Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Effects of Intramedullary K-wire Insertion on Femoral Lengthening in Canine with Monolateral External Fixator

단측성 외고정 기구를 이용한 개의 대퇴골 신연에 있어서 골수강내 K-강선 삽입의 효과

  • Hwang, Jae-Min (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Kim, Young-Ki (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Chin, Hee-Tec (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Seok, Seong-Hoon (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Lee, Hee-Chun (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Koh, Phil-Ok (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Chang, Hong-Hee (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Lee, Hyo-Jong (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Yeon, Seong-Chan (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
  • 황재민 (경상대학교 수의과대학 동물의학 연구소) ;
  • 김영기 (경상대학교 수의과대학 동물의학 연구소) ;
  • 진희택 (경상대학교 수의과대학 동물의학 연구소) ;
  • 석성훈 (경상대학교 수의과대학 동물의학 연구소) ;
  • 이희천 (경상대학교 수의과대학 동물의학 연구소) ;
  • 고필옥 (경상대학교 수의과대학 동물의학 연구소) ;
  • 장홍희 (경상대학교 수의과대학 동물의학 연구소) ;
  • 이효종 (경상대학교 수의과대학 동물의학 연구소) ;
  • 연성찬 (경상대학교 수의과대학 동물의학 연구소)
  • Published : 2006.09.30
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Abstract

During long bone lengthening, there are many disadvantages including axial deviation, malalignment and re-fracture which are commonly encountered inspite of its proven abilities. To study the effects of intramedullary K-wire application on the lengthening of long bone, ten skeletally mature mongrel dogs were separated into two groups(Group I, II). Right femurs of group I(5 dogs) were fixed with only monolateral external fixator after subperiosteal osteotomy. Right femurs of group II(5 dogs) were fixed with mono lateral external fixator and intramedullary K-wire after subperiosteal osteotomy. Lengthening was started at 7 days after the surgery with the rate of 0.5 mm per day for 5 weeks and the dogs were sacrificed after 15 weeks postoperatively to examine histologic differences and evaluate bone mineral density. Radiographic examination at an interval of two weeks was done to evaluate the type of callus formed and to analyze complications including instability of external skeletal fixation and axial deviation. Bone mineral density at the lengthened area and contralateral nonlengthened area were measured using quantitative computerized tomography. Histological examination of regenerated bone was performed using Masson's trichrome stain method. The radiographs demonstrated poor callus formation, higher incidence of axial deviation and screw loosening in the group I compared to the group II. The bone mineral density at the lengthened area in the group II was higher than that of the group I(P<0.05). Histological examination showed that the new bone trabeculae in the group II were greater than that of the group I. In conclusion, the combination of monolateral external fixator and intramedullary K-wire can prevent pin loosening, axial deviation and reduce healing period in dogs.

Keywords

References

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