Yang Zhang1, Jian Wang1, Jun Xiao1, Liang Zhao1, Zhi-Han Li1, Ge Yan1, Zhan-Jun Shi2. 1. Department of Orthopaedic Surgery, Nanfang Hospital, Guangzhou 510515, Guangdong Province, China. 2. Department of Orthopaedic Surgery, Nanfang Hospital, Guangzhou 510515, Guangdong Province, China. Electronic address: mariaresearcher@hotmail.com.
Abstract
BACKGROUND: The tibial posterior slope (PTS) is an important parameter for sagittal alignment which is associated with postoperative range of motion. However, the variations of different population subsets and different referential axes are still uncertain. METHODS: In this study, 80 healthy people from South China were recruited and measured on three-dimensional reconstruction of CT, with application of three referential axes, the proximal tibial long axis, the anterior and posterior cortices. RESULTS: The averages and standard deviations of medial PTS (MPTS) in the three methods were 8.43±3.06, 11.45±2.82 and 6.31±3.24, separately. The results of lateral PTS (LPTS) were 7.56±2.51, 10.17±2.42 and 5.22±2.59. There was no significant difference between the male and the female, and the two sides of one body. The results of the three axes varied but correlated with each other significantly. Through comparison it was found that, MPTS/LPTS of people from South China were different from the published data of other countries. CONCLUSIONS: Although PTS change markedly according to the reference axis, they show significant correlations with each other, and may be used safely. There are differences associated with races, but not gender nor the two sides of the body. CLINICAL RELEVANCE: The results of the study provided references for the reconstruction of the knee PTS, if the differences of reference axes, races and genders were considered.
BACKGROUND: The tibial posterior slope (PTS) is an important parameter for sagittal alignment which is associated with postoperative range of motion. However, the variations of different population subsets and different referential axes are still uncertain. METHODS: In this study, 80 healthy people from South China were recruited and measured on three-dimensional reconstruction of CT, with application of three referential axes, the proximal tibial long axis, the anterior and posterior cortices. RESULTS: The averages and standard deviations of medial PTS (MPTS) in the three methods were 8.43±3.06, 11.45±2.82 and 6.31±3.24, separately. The results of lateral PTS (LPTS) were 7.56±2.51, 10.17±2.42 and 5.22±2.59. There was no significant difference between the male and the female, and the two sides of one body. The results of the three axes varied but correlated with each other significantly. Through comparison it was found that, MPTS/LPTS of people from South China were different from the published data of other countries. CONCLUSIONS: Although PTS change markedly according to the reference axis, they show significant correlations with each other, and may be used safely. There are differences associated with races, but not gender nor the two sides of the body. CLINICAL RELEVANCE: The results of the study provided references for the reconstruction of the knee PTS, if the differences of reference axes, races and genders were considered.
Authors: Y Akamatsu; M Sotozawa; H Kobayashi; Y Kusayama; K Kumagai; T Saito Journal: Knee Surg Sports Traumatol Arthrosc Date: 2014-10-29 Impact factor: 4.342