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Abstract
The current study explored the slide-lengthening potentials of double and triple hemisections and the biomechanical effects of different inter-hemisection distances. Forty-eight porcine flexor digitorum profundus tendons were divided into double- and triple-hemisection groups (Groups A and B) and a control group (Group C). Group A was divided into Group A1 (distance between hemisections were the same as Group B) and Group A2 (distance between hemisections corresponded to the greatest distance between hemisections in Group B). Biomechanical evaluation, motion analysis, and finite element analysis (FEA) were performed. Failure load of intact tendon was significantly highest among groups. When the distance was 4 cm, the failure load of Group A increased significantly. When the distance between the hemisections was 0.5 or 1 cm, the failure load of Group B was significantly lower than Group A. Tendon elongation and failure load of Group B were significantly lower than those in Group A when the greatest distance between hemisections was the same. Consequently, Double hemisections had a similar lengthening ability to that of triple hemisections with the same distance, but better when the distances between extreme hemisections matched. However, the driving force for the initiation of lengthening may be greater.
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Details
1 Shenyang 242 Hospital, Burn and Plastic Surgery Department, Shenyang, China (GRID:grid.477856.f); Shenyang Medical College, Graduate School, Shenyang, China (GRID:grid.415680.e) (ISNI:0000 0000 9549 5392)
2 The First Hospital of China Medical University, Department of Orthopedics, Shenyang, China (GRID:grid.412636.4) (ISNI:0000 0004 1757 9485)
3 Shenyang University Of Technology, School of Mechanical Engineering, Shenyang, China (GRID:grid.443558.b) (ISNI:0000 0000 9085 6697)