Posterior femoral condylar offsets of a Chinese population |
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| Institution: | 1. Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA;2. Department of Orthopaedic Surgery, Second Affiliated Hospital, Medical School of Xi''an Jiaotong University, Xi''an, Shaanxi Province, China;3. Department of Orthopaedic Surgery, Shanghai Ninth People''s Hospital, Shanghai, Shanghai, China;1. Department of Orthopaedics, General Hospital of Guangzhou Military Command of PLA, Guangdong 510010, China;2. Bioenginering Laboratory, Department of Orthopaedics, General Hospital of Guangzhou Military Command of PLA, Guangdong 510010, China;1. Bone and Joint Disease Research Center, Department of Orthopedic Surgery, Chamran Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;2. Department of Pathology, Chamran Hospital, Shiraz University of Medical Sciences, Shiraz, Iran;3. McGill University, Montreal, Quebec, Canada;1. Section of Orthopaedic Surgery, University of Manitoba, AD4-820 Sherbrook Street, Winnipeg, Manitoba R3A 1R9, Canada;2. Pan Am Clinic, University of Manitoba, 75 Poseidon Bay, Winnipeg, Manitoba R3M 3K3, Canada;3. Department of Orthopaedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, United States;4. UPMC Center for Sports Medicine, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, 3200 South Water Street, Pittsburgh, PA 15203, United States |
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| Abstract: | BackgroundThe effect of posterior condylar offset (PCO) on maximal flexion of the knee after TKA is controversial. Another parameter, the posterior condylar offset ratio (PCOR), has been recently introduced to describe the posterior condylar geometry. This study measured the posterior femoral condyle geometry of a Chinese population and compared with those of a Western population published in the literature.MethodsWe measured the PCO and PCOR of 100 Chinese knees (50 males, 50 females). The distances from the anterior and posterior femoral shaft cortex line to the most posterior femoral condyle tangent line were defined as the anterior–posterior dimension (ACP) and posterior condylar offset (PCO). The PCOR was calculated as PCO/ACP. The measured PCO and PCOR were compared to those of a Western population reported in the literature.ResultsThe PCOs were 25.80 ± 2.71 and 27.32 ± 2.34 mm for the Chinese females and males, respectively, where the PCO of the females was significantly smaller than that of the males (p < 0.05). The PCORs were 0.47 ± 0.04 and 0.46 ± 0.03 for the Chinese females and males, respectively, where the PCORs were similar among the Chinese males and females (p > 0.05).ConclusionsWhile the PCO of the Chinese females was smaller than that of the males, their PCORs were similar. Compared to the data of a Western population reported in literature, the PCO of the Chinese population is significantly smaller, but the PCOR is significantly larger. |
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