Abstract:

BACKGROUND: During China knee prosthesis design and total knee replacement, not only the anatomical characteristics of the proximal tibia of the Chinese population and the differences in geometry should be considered, but also should pay attention to the differences between the different individuals.
OBJECTIVE: To analyze the changes of morphology reference value of normal proximal tibia of the Chinese population by digital technology.
METHODS: We collected the original CT scan images of knee joints in both sides of the Chinese population, and the three-dimensional digital model of knee joint was established with Mimics 10.1 software. The simulation osteotomy of proximal tibial model was performed and the relevant linear parameters of tibia section were measured.
RESULTS AND CONCLUSION: In addition to the anteroposterior diameter of the lateral tibial plateau/anteroposterior diameter of the medial tibial plateau and the difference between anteroposterior diameter of the lateral tibial plateau and anteroposterior diameter of the medial tibiale plateau, the transverse diameter and anteroposterior diameter of male patients were bigger than those of the female patients, there was significant difference of proximal tibial osteotomy nominal value between most of the male patients and female patients (P < 0.01). With the increasing of body mass index, the anteroposterior diameter of the medial tibial plateau and the transverse diameter of the tibial plateau were also increased. It indicates that there is difference among the proximal tibia morphology of normal Chinese people in gender and body mass index, reflecting in: ①The data measured by different measurement methods can fully reflect the morphological characteristics of the proximal tibia. ②The ration of anteroposterior diameter of the tibial plateau /transverse diameter of the tibial plateau of female patients is higher than that of the male patients.