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단측성 외고정 기구를 이용한 개의 대퇴골 신연에 있어서 골수강내 K-강선 삽입의 효과
황재민,김영기,진희택,석성훈,이희천,고필옥,장홍희,이효종,연성찬 한국임상수의학회 2006 한국임상수의학회지 Vol.23 No.3
During long bone lengthening, there are many disadvantages including axial deviation, malalignment andre-fracture which are comonly 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 subperiostealosteotomy. Right femurs of group II (5 dogs) were fixed with monolateral external fixator and intramedullary K-wireafter subperiosteal osteotomy. Lengthening was started at 7 days after the surgery with the rate of 0.5 m per dayfor 5 weeks and the dogs were sacrificed after 15 weeks postoperatively to examine histologic differences and evaluatebone mineral density. Radiographic examination at an interval of two weeks was done to evaluate the type of callusdensity at the lengthened area and contralateral nonlengthened area were measured using quantitative computerizedtomography. Histological examination of regenerated bone was performed using Mason's trichrome stain method. Theradiographs demonstrated poor callus formation, higher incidence of axial deviation and screw loosening in the groupI compared to the group II. The bone mineral density at the lengthened area in the group II was higher than thatof the group I (P<0.05). Histological examination showed that the new bone trabeculae in the group II were greaterthan that of the group I. In conclusion, the combination of monolateral external fixator and intramedullary K-wirecan prevent pin loosening, axial deviation and reduce healing period in dogs.
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