Comparison of Bending Strength of Six Different Type of the First Metatarsal Osteotomies.
- Author:
In Tak CHU
1
;
Yang Guk CHUNG
;
Cheong Ho CHANG
;
Young Mok KANG
Author Information
1. Department of Orthopaedic Surgery, Kang-Nam St. Mary's Hospital, The Catholic University of Korea, College of medicine.
- Publication Type:Original Article
- Keywords:
metatarsus primus varus;
metatasal osteotomy;
mechanical strength
- MeSH:
Bone Wires;
Cadaver;
Hallux Valgus;
Humans;
Immobilization;
Metatarsal Bones*;
Osteotomy*
- From:The Journal of the Korean Orthopaedic Association
2000;35(2):339-344
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: We compare the sagittal stability of 6 different osteotomies of the metatarsal shaft : the proximal crescentic, proximal chevron, Mau, Scarf, Ludloff, and biplanar closing wedge osteotomies. MATERIALS AND METHODS: Ten fresh frozen, human cadaveric specimens were used for each osteotomy. All specimens were then dissected out en bloc as the first metatarsal -medial cuneiform complex which was fixed with 3 Kirschner wires and clamped to a MTS Mini Bionix load frame. Cantiliver bending load was applied until bony fracture, pull out of screw, or a displacement of osteotomy greater than 2 mm as measured by the extensometer was observed. The data was compared with Student's t-test. RESULTS: The average bending strength for 6 osteotomies were 199.56 kg/cm2 in proximal crescentic osteotomy, 205.3 kg/cm2 in proximal chevron osteotomy, 372.0 kg/cm2 in Ludloff osteotomy, 428.4 kg/cm2 in Scarf osteotomy, 508.8 kg/cm2 in biplanar closing osteotomy, and 530.0 kg/cm2 in Mau osteotomy. Statistical analysis revealed insignificant difference (P>0.01) between Ludloff and Scarf and biplanar closing wedge and Mau osteotomies. There were statistical differences between Mau or Scarf osteotomy and proximal chevron or crescentic osteotomy. CONCLUSION: Proximal chevron and proximal crescentic osteotomies need longer postoperative immobilization for the prevention of plantar angulation of first metatasus.
