Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

[Guest guest]

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.

“I don’t need chiropractic, I’ve already had it treated by a surgeon.”

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Tue, 18 Jul 2006 16:47:03 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron fuchs dc

Eck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HS

Biomechanical study on the effect of cervical spine fusion on

adjacent-level intradiscal pressure and segmental motion.

In: Spine (2002 Nov 15) 27(22):2431-4

ISSN: 1528-1159

STUDY DESIGN: A biomechanical study was performed using cadaveric

cervical spine specimens. OBJECTIVE: To determine the effect of

cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY

OF BACKGROUND DATA: Clinical studies have reported that patients with

spinal fusion are at greater risk of pathology and early disc

degeneration at adjacent levels. It is hypothesized that eliminating

motion at one level leads to hypermobility and increased forces at

adjacent levels, thus increasing the rate of disc degeneration.

METHODS: Six cadaveric cervical spine specimens were tested.

Specimens were stabilized at T1 and loaded at C3 to 20 degrees of

flexion and 15 degrees of extension. Intradiscal pressures and

segmental motion at C4-C5 and C6-C7 were recorded first on intact

specimens, and then after anterior cervical plating at C5-C6. Changes

in intradiscal pressure and segmental motion were calculated and

statistically analyzed using a paired Student t test. RESULTS:

Intradiscal pressures were significantly increased during flexion at

both adjacent levels. The pressure increased by 73.2% at C4-C5 (P =

0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures

increased at both adjacent levels during extension, but not

significantly. During flexion, segmental motion increased at both

adjacent levels, with greater increases at C4-C5. During extension,

segmental motion increased at both adjacent levels, with greater

increases at C6-C7. CONCLUSIONS: Clinical studies have reported

increased rates of disc degeneration at levels adjacent to fusion. It

is believed that eliminating motion through fusion shifts the load to

the adjacent levels, causing earlier disc degeneration. This study

has shown that significant increases in intradiscal pressure and

segmental motion occur at levels adjacent to fusion during normal

range of motion. These results may partially explain the mechanism of

early disc degeneration at levels adjacent to cervical spine fusion.

Institutional address:

Center for Sports Medicine and Orthopaedics Foundation for Research

Chattanooga

Tennessee

USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.

“I don’t need chiropractic, I’ve already had it treated by a surgeon.”

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Tue, 18 Jul 2006 16:47:03 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron fuchs dc

Eck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HS

Biomechanical study on the effect of cervical spine fusion on

adjacent-level intradiscal pressure and segmental motion.

In: Spine (2002 Nov 15) 27(22):2431-4

ISSN: 1528-1159

STUDY DESIGN: A biomechanical study was performed using cadaveric

cervical spine specimens. OBJECTIVE: To determine the effect of

cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY

OF BACKGROUND DATA: Clinical studies have reported that patients with

spinal fusion are at greater risk of pathology and early disc

degeneration at adjacent levels. It is hypothesized that eliminating

motion at one level leads to hypermobility and increased forces at

adjacent levels, thus increasing the rate of disc degeneration.

METHODS: Six cadaveric cervical spine specimens were tested.

Specimens were stabilized at T1 and loaded at C3 to 20 degrees of

flexion and 15 degrees of extension. Intradiscal pressures and

segmental motion at C4-C5 and C6-C7 were recorded first on intact

specimens, and then after anterior cervical plating at C5-C6. Changes

in intradiscal pressure and segmental motion were calculated and

statistically analyzed using a paired Student t test. RESULTS:

Intradiscal pressures were significantly increased during flexion at

both adjacent levels. The pressure increased by 73.2% at C4-C5 (P =

0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures

increased at both adjacent levels during extension, but not

significantly. During flexion, segmental motion increased at both

adjacent levels, with greater increases at C4-C5. During extension,

segmental motion increased at both adjacent levels, with greater

increases at C6-C7. CONCLUSIONS: Clinical studies have reported

increased rates of disc degeneration at levels adjacent to fusion. It

is believed that eliminating motion through fusion shifts the load to

the adjacent levels, causing earlier disc degeneration. This study

has shown that significant increases in intradiscal pressure and

segmental motion occur at levels adjacent to fusion during normal

range of motion. These results may partially explain the mechanism of

early disc degeneration at levels adjacent to cervical spine fusion.

Institutional address:

Center for Sports Medicine and Orthopaedics Foundation for Research

Chattanooga

Tennessee

USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Sharron,

Re: I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

A more accurate term might be “innapropriate adjustments.”

Of course some people need fusions.

Some people need thorazine. But I digress. And just who are those voices? Nevermind.

Hypoth 1) If they had proper spinal care- adjustments AND exercises to address the postural and muscle imbalance issues blah blah provided by a chiropractor...who else? Maybe they wouldn’t have needed a fusion in the first place. Same as brushing and flossing.

Hypoth 2) People frequently fail to get comprehensive spinal care AFTER spinal surgery. In fact they are dissuaded from seeing a chiropractor by the surgeon who intervened in their degeneration crisis; the selfsame surgeon who give no valuable follow-up care recommendations.

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Wed, 19 Jul 2006 12:12:41 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: RE: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...]

Sent: Wednesday, July 19, 2006 8:31 AM

Sharron Fuchs;

Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.

“I don’t need chiropractic, I’ve already had it treated by a surgeon.”

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Tue, 18 Jul 2006 16:47:03 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron fuchs dc

Eck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HS

Biomechanical study on the effect of cervical spine fusion on

adjacent-level intradiscal pressure and segmental motion.

In: Spine (2002 Nov 15) 27(22):2431-4

ISSN: 1528-1159

STUDY DESIGN: A biomechanical study was performed using cadaveric

cervical spine specimens. OBJECTIVE: To determine the effect of

cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY

OF BACKGROUND DATA: Clinical studies have reported that patients with

spinal fusion are at greater risk of pathology and early disc

degeneration at adjacent levels. It is hypothesized that eliminating

motion at one level leads to hypermobility and increased forces at

adjacent levels, thus increasing the rate of disc degeneration.

METHODS: Six cadaveric cervical spine specimens were tested.

Specimens were stabilized at T1 and loaded at C3 to 20 degrees of

flexion and 15 degrees of extension. Intradiscal pressures and

segmental motion at C4-C5 and C6-C7 were recorded first on intact

specimens, and then after anterior cervical plating at C5-C6. Changes

in intradiscal pressure and segmental motion were calculated and

statistically analyzed using a paired Student t test. RESULTS:

Intradiscal pressures were significantly increased during flexion at

both adjacent levels. The pressure increased by 73.2% at C4-C5 (P =

0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures

increased at both adjacent levels during extension, but not

significantly. During flexion, segmental motion increased at both

adjacent levels, with greater increases at C4-C5. During extension,

segmental motion increased at both adjacent levels, with greater

increases at C6-C7. CONCLUSIONS: Clinical studies have reported

increased rates of disc degeneration at levels adjacent to fusion. It

is believed that eliminating motion through fusion shifts the load to

the adjacent levels, causing earlier disc degeneration. This study

has shown that significant increases in intradiscal pressure and

segmental motion occur at levels adjacent to fusion during normal

range of motion. These results may partially explain the mechanism of

early disc degeneration at levels adjacent to cervical spine fusion.

Institutional address:

Center for Sports Medicine and Orthopaedics Foundation for Research

Chattanooga

Tennessee

USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Sharron,

Re: I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

A more accurate term might be “innapropriate adjustments.”

Of course some people need fusions.

Some people need thorazine. But I digress. And just who are those voices? Nevermind.

Hypoth 1) If they had proper spinal care- adjustments AND exercises to address the postural and muscle imbalance issues blah blah provided by a chiropractor...who else? Maybe they wouldn’t have needed a fusion in the first place. Same as brushing and flossing.

Hypoth 2) People frequently fail to get comprehensive spinal care AFTER spinal surgery. In fact they are dissuaded from seeing a chiropractor by the surgeon who intervened in their degeneration crisis; the selfsame surgeon who give no valuable follow-up care recommendations.

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Wed, 19 Jul 2006 12:12:41 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: RE: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...]

Sent: Wednesday, July 19, 2006 8:31 AM

Sharron Fuchs;

Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.

“I don’t need chiropractic, I’ve already had it treated by a surgeon.”

( E. Abrahamson, D.C.)

Chiropractic physician

Lake Oswego Chiropractic Clinic

315 Second Street

Lake Oswego, OR 97034

503-635-6246

Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>

Date: Tue, 18 Jul 2006 16:47:03 -0700

< >

Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Subject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron fuchs dc

Eck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HS

Biomechanical study on the effect of cervical spine fusion on

adjacent-level intradiscal pressure and segmental motion.

In: Spine (2002 Nov 15) 27(22):2431-4

ISSN: 1528-1159

STUDY DESIGN: A biomechanical study was performed using cadaveric

cervical spine specimens. OBJECTIVE: To determine the effect of

cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY

OF BACKGROUND DATA: Clinical studies have reported that patients with

spinal fusion are at greater risk of pathology and early disc

degeneration at adjacent levels. It is hypothesized that eliminating

motion at one level leads to hypermobility and increased forces at

adjacent levels, thus increasing the rate of disc degeneration.

METHODS: Six cadaveric cervical spine specimens were tested.

Specimens were stabilized at T1 and loaded at C3 to 20 degrees of

flexion and 15 degrees of extension. Intradiscal pressures and

segmental motion at C4-C5 and C6-C7 were recorded first on intact

specimens, and then after anterior cervical plating at C5-C6. Changes

in intradiscal pressure and segmental motion were calculated and

statistically analyzed using a paired Student t test. RESULTS:

Intradiscal pressures were significantly increased during flexion at

both adjacent levels. The pressure increased by 73.2% at C4-C5 (P =

0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures

increased at both adjacent levels during extension, but not

significantly. During flexion, segmental motion increased at both

adjacent levels, with greater increases at C4-C5. During extension,

segmental motion increased at both adjacent levels, with greater

increases at C6-C7. CONCLUSIONS: Clinical studies have reported

increased rates of disc degeneration at levels adjacent to fusion. It

is believed that eliminating motion through fusion shifts the load to

the adjacent levels, causing earlier disc degeneration. This study

has shown that significant increases in intradiscal pressure and

segmental motion occur at levels adjacent to fusion during normal

range of motion. These results may partially explain the mechanism of

early disc degeneration at levels adjacent to cervical spine fusion.

Institutional address:

Center for Sports Medicine and Orthopaedics Foundation for Research

Chattanooga

Tennessee

USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

chucklechuckle ... how is this 'hypothesized'? Seems to me we've known it for as long as I've been part of the profession. At least the 'real science' proves what we already know ...don'tchajustloveitwhenthathappens?!

Sunny

Sunny Kierstyn, RN DC Fibromyalgia Care Center of Oregon 2677 Willakenzie Road, 7C

Eugene, Oregon, 97401

541- 344- 0509; Fx; 541- 344- 0955

From: Abrahamson <drscott@...>Sharron Fuchs <sharronf@...>,< >Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineDate: Wed, 19 Jul 2006 08:31:24 -0700

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.“I don’t need chiropractic, I’ve already had it treated by a surgeon.”( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Tue, 18 Jul 2006 16:47:03 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net> Play FOX Fantasy Football with MSN: Live scoring, fully customizable completely free

[Guest guest]

Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 8:31 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.“I don’t need chiropractic, I’ve already had it treated by a surgeon.”( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Tue, 18 Jul 2006 16:47:03 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.

For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 8:31 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

No one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.“I don’t need chiropractic, I’ve already had it treated by a surgeon.”( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Tue, 18 Jul 2006 16:47:03 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Oh, I agree with you about prevention.

Dr. Pierce used to ask, ' Has anyone had a 'good' adjustment ?'. Lots of hands went up. Then he would ask, ' Has anyone had a 'bad' adjustment ?' and lots of hands went up. Good, bad, inappropriate or 'I just want to hear the pop', or rip as the case may be, call it what you want.

It would be nice if good Chiropractic care could prevent all spinal problems and sicknesses. But I have yet to see it.

It would be nice if good Chiropractic care could prevent all further degeneration after a fusion but I have yet to see it.

These are the studies that need to be done and what ever the results, fearlessly published.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 11:46 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron,Re: I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments. A more accurate term might be “innapropriate adjustments.”Of course some people need fusions.Some people need thorazine. But I digress. And just who are those voices? Nevermind.Hypoth 1) If they had proper spinal care- adjustments AND exercises to address the postural and muscle imbalance issues blah blah provided by a chiropractor...who else? Maybe they wouldn’t have needed a fusion in the first place. Same as brushing and flossing.Hypoth 2) People frequently fail to get comprehensive spinal care AFTER spinal surgery. In fact they are dissuaded from seeing a chiropractor by the surgeon who intervened in their degeneration crisis; the selfsame surgeon who give no valuable follow-up care recommendations.( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Wed, 19 Jul 2006 12:12:41 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: RE: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference. sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 8:31 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineNo one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.“I don’t need chiropractic, I’ve already had it treated by a surgeon.”( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Tue, 18 Jul 2006 16:47:03 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Oh, I agree with you about prevention.

Dr. Pierce used to ask, ' Has anyone had a 'good' adjustment ?'. Lots of hands went up. Then he would ask, ' Has anyone had a 'bad' adjustment ?' and lots of hands went up. Good, bad, inappropriate or 'I just want to hear the pop', or rip as the case may be, call it what you want.

It would be nice if good Chiropractic care could prevent all spinal problems and sicknesses. But I have yet to see it.

It would be nice if good Chiropractic care could prevent all further degeneration after a fusion but I have yet to see it.

These are the studies that need to be done and what ever the results, fearlessly published.

sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 11:46 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine

Sharron,Re: I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments. A more accurate term might be “innapropriate adjustments.”Of course some people need fusions.Some people need thorazine. But I digress. And just who are those voices? Nevermind.Hypoth 1) If they had proper spinal care- adjustments AND exercises to address the postural and muscle imbalance issues blah blah provided by a chiropractor...who else? Maybe they wouldn’t have needed a fusion in the first place. Same as brushing and flossing.Hypoth 2) People frequently fail to get comprehensive spinal care AFTER spinal surgery. In fact they are dissuaded from seeing a chiropractor by the surgeon who intervened in their degeneration crisis; the selfsame surgeon who give no valuable follow-up care recommendations.( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Wed, 19 Jul 2006 12:12:41 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: RE: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Some people need fusions. Some people need fusions who see Chiropractors for years and years. I believe that some Chiropractic care can hurt the spine. There indeed are 'bad' adjustments.For those who handle PI cases ,and their patients have fusions, this just might be a helpful reference. sharron fuchs dc

From: Abrahamson [mailto:drscott@...] Sent: Wednesday, July 19, 2006 8:31 AMSharron Fuchs; Subject: Re: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineNo one thinks to adjust and strengthen the upper cervical spine and upper throacic spine and instruct in the anterior head carriage and unhealthy behaviors that probably brought about the DJD in the first place.“I don’t need chiropractic, I’ve already had it treated by a surgeon.”( E. Abrahamson, D.C.)Chiropractic physicianLake Oswego Chiropractic Clinic315 Second StreetLake Oswego, OR 97034503-635-6246Website: http://www.lakeoswegochiro.com

From: Sharron Fuchs <sharronf@...>Date: Tue, 18 Jul 2006 16:47:03 -0700< >Conversation: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. SpineSubject: An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>

[Guest guest]

Prevention is a tricky word. Lets not assume that the word means to always prevent spinal problems or sickness from ever occuring. Just as exercise, good diet, brushing flossing, , yoga etc. cannot guarantee one from ever becoming afflicted with an ailment, neither can chiropractic care act as a cure of potential spinal and other problems. All one can do is give the body the best shot at a defense and roll the dice.

Dr. ph Medlin D.C.Spine Tree Chiropractic1627 NE Alberta St. #6Portland, OR 97211Ph: 503-788-6800c: 503-889-6204

An HS Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine Sharron fuchs dcEck JC Humphreys SC Lim TH Jeong ST Kim JG Hodges SD An HSBiomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion.In: Spine (2002 Nov 15) 27(22):2431-4ISSN: 1528-1159STUDY DESIGN: A biomechanical study was performed using cadaveric cervical spine specimens. OBJECTIVE: To determine the effect of cervical spine fusion on adjacent-level intradiscal pressure. SUMMARY OF BACKGROUND DATA: Clinical studies have reported that patients with spinal fusion are at greater risk of pathology and early disc degeneration at adjacent levels. It is hypothesized that eliminating motion at one level leads to hypermobility and increased forces at adjacent levels, thus increasing the rate of disc degeneration. METHODS: Six cadaveric cervical spine specimens were tested. Specimens were stabilized at T1 and loaded at C3 to 20 degrees of flexion and 15 degrees of extension. Intradiscal pressures and segmental motion at C4-C5 and C6-C7 were recorded first on intact specimens, and then after anterior cervical plating at C5-C6. Changes in intradiscal pressure and segmental motion were calculated and statistically analyzed using a paired Student t test. RESULTS: Intradiscal pressures were significantly increased during flexion at both adjacent levels. The pressure increased by 73.2% at C4-C5 (P = 0.002), and by 45.3% at C6-C7 (P = 0.006). Intradiscal pressures increased at both adjacent levels during extension, but not significantly. During flexion, segmental motion increased at both adjacent levels, with greater increases at C4-C5. During extension, segmental motion increased at both adjacent levels, with greater increases at C6-C7. CONCLUSIONS: Clinical studies have reported increased rates of disc degeneration at levels adjacent to fusion. It is believed that eliminating motion through fusion shifts the load to the adjacent levels, causing earlier disc degeneration. This study has shown that significant increases in intradiscal pressure and segmental motion occur at levels adjacent to fusion during normal range of motion. These results may partially explain the mechanism of early disc degeneration at levels adjacent to cervical spine fusion.Institutional address: Center for Sports Medicine and Orthopaedics Foundation for Research Chattanooga Tennessee USA. jason-laurie@... <mailto:jason-laurie%40worldnet.att.net>