Biomechanical properties of lateral plate combined with medial percutaneous lag screw and its application in the distal tibial fractures
10.3969/j.issn.2095-4344.2016.26.011
- VernacularTitle:外侧钢板结合内侧经皮拉力螺钉的生物力学性能及在胫骨远端骨折中的应用
- Author:
Quan WANG
;
Donglai WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2016;20(26):3870-3875
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Current clinical studies seldom concern biomechanical properties of lateral plate combined with medial percutaneous lag screw. Moreover, effects of clinical application to distal tibial fractures are not investigated. OBJECTIVE:To explore biomechanical properties of lateral plate combined with medial percutaneous lag screw, and to analyze the repair effect on distal tibial fractures. METHODS:Six adult antiseptic tibia specimens were studied. Bone saw was used to make a bone defect in 1 cm length, which was fixed with lateral plate and lateral plate combined with medial percutaneous lag screw. Three point bending test, axial compression test and rotation test were performed. Clinical data of twenty cases of distal tibial fracture patients from the Department of Orthopedics of Hebei Medical University were analyzed and randomly divided into lateral plate groupand lateral plate combined with medial percutaneous lag screw group (n=10). Clinical repair effects were compared between the two groups. RESULTS AND CONCLUSION:(1) Biomechanical indexes of cadaver specimens: no significant difference in torsional strength was determined between the two groups (P> 0.05). Bending stress and axial displacement were significantly lower in the lateral plate combined with medial percutaneous lag screw group than in the lateral plate group (P< 0.05). (2) Repair surgery related indicators: operation time, intraoperative blood loss, length of stay and fracture healing time were significantly less in the lateral plate combined with medial percutaneous lag screw group than in the lateral plate group (P< 0.05). (3) Repair effects: There were nine cases of fracture healing in the lateral plate combined with medial percutaneous lag screw group 3 months after treatment. The total effective rate was significantly higher in the lateral plate combined with medial percutaneous lag screwgroup (90%) than in the lateral plate group (70%) (P<0.05). (4) These findings indicate that lateral plate combined with medial percutaneous lag screw has a unique advantage in resisting axial compression, torsion and bending. Its application to distal tibial fractures obtains ideal effects, can improve the clinical efficacy and stability.
