Journal of Korean Foot and Ankle Society (대한족부족관절학회지)

Korean Foot & Ankle Society (대한족부족관절학회)
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A Comparison of the Contact Area between Three Different Correcting Angles after Proximal Crescentic Osteotomy and Ludloff Osteotomy of the First Metatarsal (Preliminary Report)

제1 중족골 근위 반월형 절골술과 Ludloff 절골술 후 교정 각도에 따른 절골편간 접촉 면적 비교(예비보고)

  • Park, Yong-Wook (Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine) ;
  • Jang, Keun-Jong (Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine) ;
  • Park, Sang-Ho (Department of Mechanical Design Engineering, Chungnam National University)
  • 박용욱 (한림대학교 강남성섬병원 정형외과) ;
  • 장근종 (한림대학교 강남성섬병원 정형외과) ;
  • 박상호 (충남대학교 기계설계공학과)
  • Received : 2010.04.20
  • Accepted : 2010.05.13
  • Published : 2010.06.15
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Abstract

Purpose: This study was performed to compare the contact area between three different correcting angles after the proximal crescentic and Ludloff osteotomies of the first metatarsal. Materials and Methods: We used the two sawbone models. Proximal crescentic (PCO) and Ludloff osteotomies (LO) were performed and secured using K-wires under the correcting intermetatarsal angle (IMA) $5^{\circ}$, $10^{\circ}$, and $15^{\circ}$. Then each 6 osteotomized model was scanned five times and measured the contact area using the calculating program. We excluded the highest and lowest values. Results: The mean area of cutting surface was 189 $mm^2$ in PCO, 863 $mm^2$ in LO. The mean contact area (contact ratio; contact area $\times$100/area of cutting surface) of PCO was 149 $mm^2$ (79%) in $5^{\circ}$, 139.5 $mm^2$ (74%) in $10^{\circ}$, 107 $mm^2$ (57%) in $15^{\circ}$ IMA. The mean contact area (contact ratio) of LO was 711 $mm^2$ (82%) in $5^{\circ}$, 535.5 $mm^2$ (62%) in $10^{\circ}$, 330 $mm^2$ (38%) in $15^{\circ}$ IMA. Conclusion: A significant decrease in the contact area and contact ratio according to increase in correcting IMA was noticed in LO. We recommend the PCO rather than LO, when the IMA is needed to correct over $15^{\circ}$.

Keywords

References

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