Can We Use the Posterior Condylar Off set as a Predictive Factor for Overhang of the Implant in Total Knee Arthroplasty?

Knee Surgery & Related Research
Yoon-Seok YoumSun-Ho Lee

Abstract

We tried to demonstrate whether the posterior condylar offset (PCO, the distance from the femoral diaphysis posterior cortex to the posterior condylar margin) and ratio (PCOR, dividing PCO by the maximum antero-posterior diameter of the distal femur) could be used as predictive factors for overhang of the implants or using gender implants in total knee arthroplasty (TKA). One hundred and one women who underwent TKA using NexGen® (LPS) implants, were analyzed prospectively. After distal femoral resection, the mediolateral (ML) width was measured at four points (anterior, distal anterior, distal posterior and posterior) and compared with the ML width of the implant. The aspect ratio (AR, ML/AP ratio) and anterior/distal posterior ML width (Ant/DP) were calculated. Preoperative radiographic PCO and PCOR were measured. Differences of PCO, PCOR, AR and Ant/DP according to the size were analyzed and correlations between PCO, PCOR and AR were also analyzed. The patients were classified into two groups according to the presence of overhang, and differences of each parameter were compared between the two groups. The size of the implant was positively correlated PCO, not significantly correlated with PCOR, and negatively correlated with ...Continue Reading

References

Feb 2, 2000·The Journal of Arthroplasty·S V VaidyaN S Laud
Feb 12, 2002·The Journal of Bone and Joint Surgery. British Volume·J BellemansA Moemans
Sep 29, 2006·Orthopedics·Robert E Booth
Oct 3, 2007·The Journal of the American Academy of Orthopaedic Surgeons·Sheryl ConleyRoy Crowninshield
Sep 19, 2008·Clinical Orthopaedics and Related Research·Steven J MacDonaldCecil H Rorabeck
Sep 30, 2008·Clinical Orthopaedics and Related Research·Alan C MerchantRobert A Teitge

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Citations

Jul 25, 2015·Orthopaedics & Traumatology, Surgery & Research : OTSR·P H Almeida, A Vilaça
Jul 22, 2015·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Yukihide MinodaHiroaki Nakamura

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