Abstract:
UNLABELLED:Controversy exists as to whether bearing mobility facilitates centralization of the extensor mechanism after TKA. To assess the incidence of lateral retinacular release, we retrospectively reviewed 1318 consecutive primary TKAs (1032 patients) performed by one surgeon using either a rotating-platform bearing (940) or a fixed bearing (378) from the same implant system. The selection of a fixed- versus mobile-bearing TKA was primarily based on age with patients younger than 70 years receiving a mobile-bearing TKA. We performed a lateral release whenever continuous symmetric patellar facet contact with the trochlear groove from 0 degrees to 90 degrees of flexion was not obtained using the rule of no thumb after tourniquet release. One hundred four of 1318 knees (7.9%) had a lateral release. We performed more lateral releases in the fixed-bearing group (14.3% [54 of 378]) than in the mobile-bearing group (5.3% [50 of 940]). Patellar tilt occurred more often in the mobile-bearing group (10% [94 of 940]) than in the fixed-bearing group (6.9% [26 of 378]), although the magnitude of mean patellar tilt was small in both groups (mobile-bearing 3.0 degrees ; fixed bearing 2.55 degrees ). No patient had patellar subluxation greater than 5 mm. We suspect the fewer lateral releases in the mobile-bearing group is the result of better extensor mechanism centralization provided by bearing rotation. LEVEL OF EVIDENCE:Level III, prognostic study. See the Guidelines for a complete description of levels of evidence.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Yang CC,McFadden LA,Dennis DA,Kim RH,Sharma Adoi
10.1007/s11999-008-0425-ysubject
Has Abstractpub_date
2008-11-01 00:00:00pages
2656-61issue
11eissn
0009-921Xissn
1528-1132journal_volume
466pub_type
杂志文章abstract::Minimizing the surgical approach in treating patients with spinal infections by using local antibiotic treatment and avoiding a ventral approach reduces the anesthesia and surgical risks in patients with comorbidities. In this study we used calcium sulphate pellets (OsteoSet T and the OsteoSet Bone-void Filler kit) as...
journal_title:Clinical orthopaedics and related research
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journal_title:Clinical orthopaedics and related research
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journal_title:Clinical orthopaedics and related research
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journal_title:Clinical orthopaedics and related research
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Clinical orthopaedics and related research
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journal_title:Clinical orthopaedics and related research
pub_type: 杂志文章,随机对照试验
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更新日期:2011-12-01 00:00:00