THR ceramic vs MOM resurfacing -- check it out

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Someone posted this on another site. Looks interesting.

Joe Alvord Eagle River, Alaska

Primary Ceramic-on-Ceramic THR versus Metal-on-Metal Hip Resurfacing

in Active Young Patients

Paper No: 028

Wednesday, February 23, 2005

12:06 PM - 12:12 PM

Location: Room 207

Christophe Pattyn, MD Zomergem Belgium (n)

Koen Aime De Smet, MD Heusden Belgium (e- Medical)

Moderator(s):

Seth S Leopold, MD Seattle WA

D Ries, MD San Francisco CA

Adult Recon/Hip

The early clinical results in the group of metal-on-metal resurfacing

are very satisfactory with and PMA scores indicating early

clinical success.

The difference in outcome after uncemented ceramic-on-ceramic total

hip and metal-on-metal resurfacing is looked at in comparable patient

groups.

Theoretical advantages in resurfacing are less bone resection, normal

femoral loading, avoidance of stress shielding and restoration of

normal anatomy. In addition, reduced risk of dislocation, less leg

lengthening and easier revision should convince us to perform

metal-on-metal resurfacing.

The first 250 cases of 1067 (September 1998 – March 2004) performed

Birmingham Hip resurfacings (MMT, UK) (follow up 2-5 years, mean age

49.54) were scored clinically and functionally.

In the same period (July 1996 – September 2003) 164

ceramic-on-ceramic Ancafit total uncemented prostheses (

Medical, US) were implanted in the same age and activity group as the

resurfacings. The first group of 126 patients (follow up 2 – 6 years,

mean age 46.76) was compared with the resurfacing group.

At the most recent follow-up there was a significant statistical

difference in Hip Scores (global and total), and activity

function between the 2 types of prostheses. Resurfacing scored a

Hip Total of 97.9 (ceramic THA 92.1). Of the resurfacing

patients 60.71 had a strenuous activity (ceramic THA 30.43).

Dislocation rate in resurfacing group was 0.4 percent (ceramic THA 3

percent).

The early clinical results in the group of metal-on-metal resurfacing

are very satisfactory with and PMA scores indicating early

clinical success. The high percentage of strenuous activity and better

Hip Score in this young patient group satisfies the

expectations of the resurfacing.

Floor discussion immediately follows paper presentation.

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