Action mechanism for effects of tibial rotational alignment technique on patellofemoral joint biomechanics
10.3969/j.issn.2095-4344.2016.22.015
- VernacularTitle:胫骨假体旋转对线技术影响髌股关节生物力学的作用机制
- Author:
Kai LIU
- Publication Type:Journal Article
- Keywords:
Subject headings:Arthroplasty,Replacement,Knee;
Prosthesis Implantation;
Biomechanics;
Tissue Engineering
- From:
Chinese Journal of Tissue Engineering Research
2016;20(22):3301-3307
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:At present, the placement of tibial anatomic landmarks has no gold standard during total knee arthroplasty. In order to achieve the most ideal rotation function of the tibial prosthesis, we should do the preparation before surgery, understand tibial rotational alignment to rationaly select and apply the prosthesis.
OBJECTIVE:To investigate the effect of tibial rotational alignment technique on patelofemoral joint biomechanics and related mechanisms.
METHODS:Ten pairs of human knee joint specimens were colected to prepare experimental platform. Specimens were fixed on the experiment frame, which was fixed on the material testing instrument for mechanics experiment. Weset different knee flexion angles, including 30°, 60°, 90° and 120°. Joint replacement was performed with the knee prosthesis. Samples were randomly assigned to two groups (n=5). Tibial nodule technology and ROM technology were used to identify rotationalalignment of the tibial prosthesis. The medial and lateral patelofemoral joint contact pressure peak and patelofemoral contact area at different knee angles, and the medial and lateral parts of patelofemoral contact area at deep knee angles were observed in both groups.
RESULTS AND CONCLUSION:(1) During flexion angle from 30° to 60°, the peak contact pressure of medial patelofemoral joint increased, and decreased gradualy in both groups. At flexion angle of 90°, contact pressure reached the minimum value, then increased gradualy, and reached the maximum value at 120°. No significant difference in peak contact pressure of medial patelofemoral joint at different knee angles was detected between the two groups (alP> 0.05). (2) During flexion angle from 30° to 60°, peak contact pressure of lateral patelofemoral joint decreased constantly, and then gradualy increased. No significant difference in peak contact pressure of lateral patelofemoral joint at different knee angles was detectable between thetwo groups (alP> 0.05). (3) During flexion angle from 30° to 60°, patelofemoral contact area decreased, and then increased gradualy in both groups. No significant difference in patelofemoral contact area at different knee angles was identified between the two groups (alP> 0.05). (4) At 90° and 120°, no significant difference in the area of medial and lateral contact parts was determined between the two groups (alP> 0.05). (5) Experimental results showed that tibial nodule technology and ROM technology for identifying tibial rotational alignment during total knee arthroplasty can obtain considerable biomechanical effects of patelofemoral joint.
