Early postoperative subsidence is not a common finding among asymptomatic THA patients.
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Early subsidence >1 mm appears uncommon in asymptomatic THA; this case report leaves open whether routine SPG monitoring improves outcomes.
Chafetz N, Baumrind S, Murray WR, Genant HK. Femoral prosthesis subsidence in asymptomatic patients: a stereophotogrammetric assessment. Invest Radiol 1984;19:235-241. A radiographic stereophotogrammetric technique (SPG) was used to evaluate quantitatively the presence of early femoral prosthesis subsidence after total hip arthroplasty (THA). This paper focuses on the measurement of subsidence in 12 patients who remained asymptomatic during the first two years after surgery. Only one of these had SPG estimated subsidence in excess of one millimeter at any timepoint. These findings are consistent with the conclusion that early postoperative subsidence is not a common finding among asymptomatic THA patients.
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Chafetz et al. (1984) studied this question.
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