The measurement and clinical significance of the posterior slope angle of medial tibial plateau in normal Chinese
- VernacularTitle:华北地区成人正常胫骨内侧平台后倾角的测量及临床意义
- Author:
Tiebing QU
;
Jizhou ZENG
;
Yuan LIN
- Publication Type:Journal Article
- Keywords:
Tibia;
Arthroplasty, replacement, knee;
China
- From:
Chinese Journal of Orthopaedics
2001;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective The measurement of normal tibia was aimed to obtain the value of the posterior slope angle of the medial tibial plateau in Chinese adult and its related parameters in order to improve the design of knee prosthesis more suitable for Chinese people, and also provide an essential features of tibia for resecting tibial plateau in total knee arthroplasty. Methods 450 knees of 428 persons which were healthy Chinese adult long living in North China, were 252 male knees and 198 female knees with an average age of 43.9 years ranging from 18 to 79 years. The criteria of the subjects were no tibial deformity, no genu varum and valgum, abnormal changes of articular surface, and had sustained ever any tibial trauma. Depending on the age of subjects, they were divided into three groups, group A was between 18 and 39 years, group B between 40 to 59 years, and group C more than 60 years. Moreover, 6 tibias harvested from healthy Chinese corpses were measured as well. Computer radiography was used to take standard lateral aspect of X-ray film. The imagines were stored into computer by scanning the films, and so the measurement was taken in computer using Danzig method. The data were analyzed statistically. Results By two factors analysis, the sex and age had no significant influence of the posterior slope angle of the tibia; furthermore, the angle was not different between the left and right tibia. In male adult, the average degrees of left posterior slope angle of the medial tibial plateau were 13.2??4.4?, the right 10.5??5.1?, and the average degrees of posterior slope angle of both sides were 11.7??4.9?. In female adult, the average degrees of left posterior slope angle of the medial tibial plateau were 11.2??3.5?, the right 10.6??4.4?, and the average degrees of posterior slope angle of both sides were 10.8??4.0?. The average degree of group A were 11.7??4.4?, group B 10.4??4.7?, group C 12.3??4.4?. In summary, there was no significant difference of posterior slope angle of the medial tibial plateau between sex, side and age. Conclusion The average degrees of posterior slope angle of the medial tibial plateau in North China adult were 11.3??4.5? ranging from 0??21? to 9?-13?, and were larger than that of the Westerns.
