Biomechanical requirement for the reconstruction of patellar fracture treated with cancellous bone screw and nickel-titanium-patellar concentrator internal fixation

doi:10.3969/j.issn.2095-4344.2013.22.011

Abstract

Abstract:

BACKGROUND: There are various internal fixation methods for the clinical treatment of patellar fractures, but each method has advantages and disadvantages, respectively. The selection of proper internal fixation method will directly affect the healing time and recovery of knee joint function.
OBJECTIVE: To investigate the biomechanical reconstruction effect on patellar fracture treated with cancellous bone screw and nickel-titanium-patellar concentrator internal fixation.
METHODS: A retrospective analysis was performed on 27 cases of acute patellar fracture patients from January 2011 to January 2012 in the Department of Orthopedics, Jinshan Hospital, Fudan University, including 13 cases of transverse fracture, 11 cases of comminuted fracture and three cases of upper or lower pole fracture. All the 27 patients received cancellous bone screw and nickel-titanium-patellar concentrator internal fixation without plaster external fixation, and then the quadriceps active contraction training was performed from the 2nd day after internal fixation, and bed knee flexion and extension exercises were performed at 1 week after internal fixation. The knee joint function was evaluated with Böstman score system.
RESULTS AND CONCLUSION: All the 27 patients were followed-up for 4-14 months. Incisions obtained stage Ⅰ healing, and there was no fracture fixation or shedding, wound infection, skin necrosis or other complications. The average healing time was 8.5 weeks without delayed healing. According to clinical grading scale of Böstman score system, the mean score was 27.9, included 27 cases of excellent (81%), four cases of good (15%), one case of poor (4%), and the excellent and good rate was 96%. The results suggest that cancellous bone screw combined with nickel-titanium-patellar concentrator internal fixation can maintain the advantages of traditional internal fixation method, and can avoid the disadvantages of the traditional internal fixation method.

Key words: bone and joint implants, orthopedic implants, patellar fracture, cancellous bone screw, nickel-titanium-patellar concentrator, internal fixation, biomechanics

CLC Number:

R318

Gao Zhen-chao, Liu De-chang, Cai Guo-ping. Biomechanical requirement for the reconstruction of patellar fracture treated with cancellous bone screw and nickel-titanium-patellar concentrator internal fixation[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(22): 4062-4069.

Figures/Tables 4

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