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A COMPARISON OF REVISION RATES FOR STEMMED AND STEMLESS PRIMARY ANATOMIC SHOULDER ARTHROPLASTY WITH ALL-POLYETHYLENE GLENOID COMPONENTS: ANALYSIS FROM THE AUSTRALIAN ORTHOPAEDIC ASSOCIATION NATIONAL JOINT REPLACEMENT REGISTRY

conference contribution
posted on 2023-03-01, 21:57 authored by David Gill, Sophie Corfield, D Harries, Richard PageRichard Page
We compared the rate of revision of two classes of primary anatomic shoulder arthroplasty, stemmed (aTSA) and stemless (sTSA) undertaken with cemented all polyethylene glenoid components. A large national arthroplasty registry identified two cohort groups for comparison, aTSA and sTSA between 1st January 2011 and 31st December 2020. A sub-analysis from 1 January 2017 captured additional patient demographics. The cumulative percentage revision (CPR) was determined using Kaplan-Meier estimates of survivorship and hazard ratios (HR) from Cox proportional hazard models adjusted for age and gender. Of the 7,533 aTSA procedures, the CPR at 8 years was 5.3% and for 2,567 sTSA procedures was 4.0%. There was no difference in the risk of revision between study groups (p=0.128). There was an increased risk of revision for aTSA and sTSA undertaken with humeral head sizes <44mm (p=0.006 and p=0.002 respectively). Low mean surgeon volume (MSV) (<10 cases per annum) was a revision risk for aTSA (p=0.033) but not sTSA (p=0.926). For primary diagnosis osteoarthritis since 2017, low MSV was associated with an increased revision risk for aTSA vs sTSA in the first year (p=0.048). Conversely, low MSV was associated with a decreased revision risk for sTSA in the first 6 months (p<0.001). Predominantly aTSA was revised for loosening (28.8%) and sTSA for instability/dislocation (40.6%). Revision risk of aTSA and sTSA was associated with humeral head size and mean surgeon volume but not patient characteristics. Inexperienced shoulder arthroplasty surgeons experience lower early revision rates with sTSA in the setting of osteoarthritis. Revision of aTSA and sTSA occurred for differing reasons.

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Alternative title

A COMPARISON OF REVISION RATES FOR STEMMED AND STEMLESS PRIMARY ANATOMIC SHOULDER ARTHROPLASTY WITH ALL-POLYETHYLENE GLENOID COMPONENTS: ANALYSIS FROM THE AUSTRALIAN ORTHOPAEDIC ASSOCIATION NATIONAL JOINT REPLACEMENT REGISTRY

Volume

105-B

Pagination

57-57

Location

Christchurch, New Zealand

Start date

2022-10-31

End date

2022-11-03

Title of proceedings

Orthopaedic Proceedings

Event

The New Zealand Orthopaedic Association and the Australian Orthopaedic Association (NZOA AOA) Combined Annual Scientific Meeting

Issue

Supp_2

Publisher

Bone and Joint

Place of publication

London

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