Advancements in Inlay Glenoid Components for Anatomic Total Shoulder Arthroplasty: A Review

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Arthroplasty design

Background:

• Anatomic total shoulder arthroplasty success is limited by glenoid component loosening.
• Inlay glenoid components show good outcomes but raise concerns about pain relief.
• Surgeons are hesitant to adopt certain glenoid designs due to potential complications.

Purpose of the Study:

• To review the design rationale of the inset glenoid component.
• To examine the biomechanical evidence supporting the inset glenoid.
• To assess the clinical performance of the inset glenoid component.

Main Methods:

• Review of existing literature on glenoid component designs.
• Analysis of biomechanical studies comparing inset, inlay, and onlay components.
• Evaluation of clinical outcome data from case series with short-term follow-up.

Main Results:

• The inset glenoid component aims for stability via subchondral bone implantation and reduced vault removal.
• Its design seeks to mitigate the rocking-horse phenomenon.
• Limited series indicate superior biomechanical and clinical performance compared to onlay components.

Conclusions:

• The inset glenoid component presents a promising alternative to traditional designs.
• Further clinical studies are needed to fully establish its long-term efficacy.
• Favorable short-term outcomes suggest potential for improved shoulder arthroplasty results.