[Partial exchange in total hip arthroplasty : What can we combine?]

Area of Science:

• Orthopedic surgery
• Biomaterials science

Background:

• Hip revision arthroplasty often involves retaining a well-fixed component.
• Combining implants from different manufacturers, known as "mix and match," presents compatibility challenges.

Purpose of the Study:

• To outline compatible implant combinations for partial hip revision.
• To detail specifications for successful partial hip prosthesis exchange.
• To analyze literature, surgical techniques, and clinical experiences.

Main Methods:

• Literature review of hip revision arthroplasty.
• Analysis of manufacturers' surgical techniques.
• Inclusion of clinical results and expert experience.

Main Results:

• Compatibility is crucial when mixing implants, especially concerning the stem cone and head articulation.
• Ceramic heads with titanium sleeves can be used with different cup inlays if compatible.
• Custom inlays or cementing inlays into existing cups are viable options when original parts are unavailable.

Conclusions:

• Detailed planning is essential for challenging partial hip revisions.
• Informed patient consent is required for "mix and match" procedures.
• While supported by good clinical outcomes, specific "mix and match" combinations lack definitive recommendations due to legal considerations.