• 대한수의학회지
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• 제42권3호
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• pp.411-418
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• 2002

단측성 외고정기구를 이용한 대퇴골 신연술의 합병증을 조사하기 위하여 30마리의 토끼를 대상으로 대퇴골 신연술을 실시하였다. 20마리의 토끼는 대퇴골 신연부의 가골이 완전 경화될 때까지 생존하였다. 10마리의 토끼는 대퇴골 신연 도중 합병증으로 인해 안락사 시켰다. 20마리의 토끼는 대퇴골 신연 비율에 따라 두 군으로 분류하였다: I군(대퇴골 길이의 10%를 신연한 군), II군(대퇴골 길이의 20%를 신연한 군). 두 군 사이에서 대퇴골 신연부위의 골경화 기간은 통계학적으로 유의적인 차이를 보이지 않았다(p=0.25). 두 군의 60%에서 골신연부위의 내반변형이 발생하였으며, I군에 비해 II군에서 보다 높은 내반각 변형을 관찰할 수 있었다. II군의 30%에서 대퇴골 내측관절융기에서 퇴행성 관절염 소견이 나타났다. 골신연을 중단했던 10마리의 토끼에서 핀 빠짐 5두, 골절 2두, 골수염 3두의 합병증이 나타났다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 춘계학술대회 논문집
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• pp.158-161
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• 2002

We investigated whether controlled dynamization enhanced regenerative bone healing of the tibia in 12 adult mongrel dogs. An average of 2 cm (∼ 10% of bone length) lengthening was obtained. The left hindlimb was allowed dynamization of 1 mm, 2 mm, and 3 mm in magnitude when 1 cm (∼ 5%) of lengthening was achieved, whereas the right hindlimb was not dynamized and served as a control. Bone mineral density (BMD) of the regenerative bone was measured periodically until nine weeks after the end of distraction. After sacrifice, uniaxial compression testing was performed. Relative BMD ratio and

• 대한족부족관절학회지
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• 제3권1호
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• pp.33-39
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• 1999

Brachymetatarsia of the first metatarsal is uncommon. It may occur as a congenital condition. Hallux varus is the name given to a medially deviated position of the first metatarsophalangeal joint with a nonpurchasing hallux in varus position. To have a patient with not only both hallux varus and brachymetatarsia, but for the brachymetatarsia to occur about the first metatarsal, is extremly rare. We experienced a case of the brachymetatarsia of the first metatarsal with hallux varus treated by callotasis. Excellent cosmetical and funtional outcome were obtained. So we reporting the case with a review of the literatures.

• 대한족부족관절학회지
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• 제16권3호
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• pp.197-201
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• 2012

Callotasis has been widely used to treat brachymetatarsia. But various complications have been reported. Avascular necrosis of the $4^{th}$ brachymetatarsia treated by callotasis has not been frequently addressed in the literature. We report 1 cases of avascular necrosis of the $4^{th}$ brachymetatarsia treated by callotasis with a review of the literature.

• 대한족부족관절학회지
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• 제6권1호
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• pp.73-79
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• 2002

Purpose: To evaluate the effectiveness of callotasis using the external fixator for the treatment of brachymetatarsia. Materials and Methods: Eleven patients(15 cases) who underwent callotasis were available. Follow-up averaged 23 months(15-38 months). Both the patients' postoperative satisfaction and the postoperative radiographic results were retrospectively evaluated. Results: The duration from applying the external fixator to remove averaged 15 weeks (8-21 weeks). We did osteotomy again in two cases because of early consolidation at the osteotomy site during distraction period. All cases were evaluated mild claw toe deformity and motional pain in metatarsophalangeal joint, but all patients satisfied the postoperative results except one complained motional pain and stiffness in metatarsophalangeal joint. The metatarsal shortening averaged 13mm(9-18mm) before operation. The amount of distraction for shortened metatarsals averaged 15mm(5-22mm). We found the 6 cases of narrowing of the metatarsophalangeal joint, 2 cases of subluxation of the metatarsophalangeal joint. Conclusion: We think that callotasis with external fixator is good operative method for the brachymetatarsia.

• 대한족부족관절학회지
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• 제14권2호
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• pp.186-189
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• 2010

Among congenital brachymetatarsias fourth metatarsal bone shortening is most common form and unusually involves multiple metatarsal bones. We report a case of the patient with bilateral 1st and 4th multiple rays brachymetatarsia treated with callostasis. Twenty eight months after procedure, right side showed 1st metatarsal lengthening about 11.5 mm (29.23%) and 4th metatarsal 17.86 mm (35.87%). Twenty one months later, left side showed 1st metatarsal lengthening about 14.58 mm (36.8%) and 4th metatarsal 20.52 mm (43.01%). In healing index right side showed 1st metatarsal 3.4 month/cm, 4th metatarsal 2.5 month/cm and left side showed 1st metatarsal 4.2 month/cm, 4th metatarsal 2.3 month/cm. Final follow-up results presented excellent outcome in cosmetic problem, easy wear of shoes, and measurement of patient's self satisfaction.

• 대한족부족관절학회지
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• 제9권2호
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• pp.140-145
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• 2005

Purpose: To analyze the outcome of metatarsal lengthening of first brachymetatarsia by callotasis using an external fixator. Materials and Methods: Between January 1998 and February 2004, 10 patients (17 cases) were reviewed. The mean age at operation was 17.3 years. Seven patients had bilateral first brachymetatarsia and eight patients had combined 4th brachymetatarsia. The operations were performed with a monoexternal fixator, and distraction was started at a rate of 0.75 mm/day after 7 days. The radiographic results were evaluated by lengthening amount and percentage, fixation time, and healing index. Complications and AOFAS score were evaluated. Results: The average lengthening amount was 17.7 mm and the average lengthening percentage was 43.4%. The external fixation time was 107 days and average healing index was 69.8 days/cm. The evaluation according to AOFAS score was excellent in 12 cases and good in 5 cases. Complications were 4 cases of hallux valgus, 4 of metatarsophalangeal joint stiffness, 3 of medial angular deformity, 3 of pes cavus, 2 of pin breakage, 2 of pin site infection, and 1 of skin hyperpigmentation. Conclusion: Callotasis for 1st brachymetatarsia is a very useful treatment method with high patient satisfaction, excellent healing rate and early ambulation without bone graft. Nevertheless, great care must be taken to minimize the various possible complications.