Abstract：
INTRODUCTION:Lateral retinacular release (LRR) is a common procedure during total knee arthroplasty (TKA), especially if patellar maltracking is observed intraoperatively. The impact of LRR on patellofemoral kinematics is well-examined, but the influence on femorotibial kinematics requires more elucidation. Therefore, the aim of this study was to evaluate the effects of LRR on femorotibial kinematics in vitro. MATERIALS AND METHODS:A fixed bearing TKA was implanted in six human knee specimens. Femorotibial kinematics were measured dynamically through the use of a custom-constructed knee rig which flexes the knee from 20° to 120° under weight bearing conditions. Measurements were performed before and after LRR. LRR was performed completely including transection of synovium, retinaculum and tractus fibers. For the registration of tibiofemoral kinematics a 3-dimensional-ultrasound-based motion analysis system was used. RESULTS:LRR revealed a significant reduction of femoral rollback at the lateral compartment (9.4 ± 5.0 vs 7.8 ± 9.4 mm; p < 0.01), whereas the present decrease of femoral rollback at the medial compartment was not significant (3.4 ± 4.7 vs 2.3 ± 5.9 mm; p = 0.34). Accordingly, LRR significantly reduced internal rotation of the tibia (0.8°; p < 0.01). CONCLUSION:The results suggest that LRR significantly decreases lateral femoral rollback as well as internal rotation of the tibia, probably by changing the tension of the iliotibial band. When performing a LRR in clinical routine, surgeons should be aware of altering not only patellofemoral kinematics but also the femorotibial kinematics.
journal_name
Arch Orthop Trauma Surgjournal_title
Archives of orthopaedic and trauma surgeryauthors
Steinbrück A,Schröder C,Woiczinski M,Glogaza A,Müller PE,Jansson V,Fottner Adoi
10.1007/s00402-017-2843-3subject
Has Abstractpub_date
2018-03-01 00:00:00pages
401-407issue
3eissn
0936-8051issn
1434-3916pii
10.1007/s00402-017-2843-3journal_volume
138pub_type
杂志文章abstract：INTRODUCTION:Many studies have identified factors prognostic for soft tissue sarcomas of local recurrence, and distant metastasis. Several studies demonstrated that some subsets of patients could be safely treated by surgery alone, with acceptable rates of local recurrence. The aim of this study was to better clarify t...
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journal_title：Archives of orthopaedic and trauma surgery
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