The Journal of bone and joint surgery. American volume
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J Bone Joint Surg Am · Jan 2007
Randomized Controlled Trial Multicenter StudyPrevalence of heterotopic ossification following total disc replacement. A prospective, randomized study of two hundred and seventy-six patients.
Despite reports of good clinical outcomes in patients treated with lumbar and cervical disc replacements, varying degrees of heterotopic bone have been observed around these devices. The purposes of the present study were to determine the prevalence of heterotopic ossification following lumbar disc replacement and to investigate whether heterotopic ossification results in loss of motion or negatively affects clinical outcome. ⋯ Heterotopic ossification is infrequent in patients treated with the CHARITE Artificial Disc, and it does not impact the range of motion or clinical outcome.
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J Bone Joint Surg Am · Jan 2007
Multicenter StudyInfluence of preoperative functional status on outcome after total hip arthroplasty.
International registries with large, heterogeneous patient populations provide excellent research opportunities for studying factors that influence treatment outcomes after total hip arthroplasty. In the present study, we used a European multinational database to investigate whether there is an association between three functional variables (preoperative pain, mobility, and motion) and functional outcome. ⋯ Patients with poor preoperative walking capacity and hip flexion are less likely to achieve an optimal outcome with regard to walking and motion. In contrast, there is no correlation between the preoperative pain level and pain alleviation, which is generally good and long-lasting after total hip arthroplasty.