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Why are there so many types of hip implants out there?

Hip replacement surgery is becoming increasingly common. While at one time, it may have been thought that one replacement is as good as the next, surgeons and researchers have learned that there is no one-size-fits all hip replacement.

Surgeons make the decision of what type of implant to use based on a few different factors:

- how big is the person having the surgery
- how much of the hip is being replaced (partial versus total)
- in what condition is the patient's bone
- how active is the patient/how old is the patient
- what is he or she most familiar with in terms of how often they've used what type of implant.

Reference: 

John J. Callaghan, MD. et al. Survivorship of a Charnley Total Hip Arthroplasty. In Journal of Bone and Joint Surgery. No. 91. Pp. 2617 to 2621.

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