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Incorrect sizing of femoral and/or tibial components
58%
1467/2541
Male gender
11%
282/2541
Obesity
17%
431/2541
History of trauma
3%
64/2541
Presence of preoperative osteophytes (hypertrophic arthrosis)
283/2541
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Heterotopic bone ossification (HO) following TKA has not been associated with valgus knee deformity. HO formation can be noted both after a THA and TKA, but unlike the hip, it rarely becomes a clinical problem in the knee. The overall incidence of HO after TKA varies greatly among published studies, ranging from 15-50%. In the study by Dalury et al, they noted a 15% HO incidence. Among those with HO, 95% had osteoarthritis and 5% had a history of inflammatory arthritis. In their study, obese and male patients also had a higher incidence of developing post-operative HO. Toyoda et al. showed a significantly higher rate of HO in patients with osteoarthritis and pre-operative osteophyte formation (hypertrophic arthrosis). Overall, the significant risk factors include hypertrophic arthrosis (often seen with trauma), male gender, and obesity.
2.4
(47)
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