Gradual partial weight bearing is generally recommended guided by the articular involvement, patient factors, fracture pattern and fixation.
逐渐部分负重一般建议遵循关节参与，病人因素，骨折固定模式。
2
According to elastic mechanics theories and fracture mechanics knowledge, the mechanics models for boundary value problem to a class of partial differential equations are presented.
据弹性力学理论、断裂力学知识，给出了该问题的力学模型：一类偏微分方程边值问题。
3
Objective: to analyses the design factors contributed to the fracture of removable partial dentures in the elderly in order to improve the design level and the quality of the dentures.