A comparison between a hinged plate and screw system and a conventional tension-band plate and screw system used for correction of an angular deformity of the lower limb: an animal study

Journal of Orthopaedic Surgery and Research

Daniel Edward Porter¹  Fengcang Ma³  Jie Zhu²  Hai Li²  Jianlin Liu²  Li Zhao²  Dahang Zhao²  Zhenkai Wu² 

[1] Department of Orthopaedic Surgery, Edinburgh Orthopaedic Trauma Unit Royal Infirmary of Edinburgh, Edinburgh EH16 4SU, UK;Department of Pediatric Orthopaedics, Xin-Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, No. 1665, Kongjiang Road, Shanghai 200092, China;School of Materials Science & Engineering, University of Shanghai for Science and Technology, No. 516, Jungong Road, Shanghai 200093, Shanghai, China

关键词: Angular deformity;    Hinged plate and screw system;    Staple;    Tension-band plate and screw system;    Temporary hemiepiphysiodesis;   

Others  :  1180757
DOI  :  10.1186/s13018-015-0198-4

 received in 2015-02-11, accepted in 2015-04-10,  发布年份 2015

【 摘 要 】

Background

The purpose of the animal study is to introduce a newly designed hinged plate and screw system for correction of angular deformities of the lower limbs. The technique was compared with the use of a conventional tension-band plate and screw system.

Methods

This is a randomized controlled animal trial. Eight 3-month-old Bama miniature pigs were used to establish animal models. In each animal, one leg was randomly allocated into study group and another leg into control group. Legs of the study group were corrected with a hinged plate and screw system, and legs of the control group were corrected with a conventional tension-band plate and screw system. The corrective rates of medial slope angle, medial proximal tibial angle, and angle of the two arms of the hinged plate were measured. Residual stress on the implants was also evaluated. A P < 0.05 was statistical significant.

Results

At the final measurements of 18 weeks, the mean corrective rates of medial slope angle, medial proximal tibial angle, and angle of the two arms of the study group were 0.71°/week, 0.85°/week, and 2.18°/week, respectively; the data in the control group were 0.84°/week, 0.89°/week, and 2.13°/week, respectively. No significant difference was found between the groups regarding the mean corrective rates of the angles (P < 0.05). The mean residual stress in the study group was 643.35 MPa, and measurement in the control group was 1,273.63 MPa, with a significant difference (P < 0.05).

Conclusions

Compared to the conventional tension-band plate and screw system, the hinged plate and screw system may be more reliable for correction of angular deformities of the lower limb.

【 授权许可】

   
2015 Wu et al.; licensee BioMed Central.

【 图 表 】

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