• 대한치과의사협회지
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• 제56권4호
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• pp.208-216
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• 2018

Patients with malocclusion may present with preexisting mucogingival problems susceptible to attachment loss during or after orthodontic treatment. Lower anterior teeth especially show a high prevalence of gingival recession following orthodontic treatment. This case report demonstrates hard tissue augmentation of labially thin or deficient alveolar bone (dehiscences and fenestrations) to prevent attachment loss during or after orthodontic treatment. Three patients presented clinically prominent root surfaces and dehiscences and fenestrations on cone-beam computed tomography (CBCT) in lower anterior teeth. Labial hard tissue augmentation of lower anterior teeth was performed with deproteinized bovine bone mineral and collagen membrane. Six months later, hard tissue augmentation reduced root prominence and created a greater volume of hard tissue on lower anterior area in clinical and radiographic findings. Hard tissue augmentation using xenograft could prevent attachment loss associated with orthodontic treatment and maintain stability of healthy periodontium.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제28권3호
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• pp.229-236
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• 2006

The biologic principle of guided bone regeneration(GBR) has been studied extensively in hopes of regenerating alveolar bone. Various materials have been utilized as regenerative membranes and grafting materials in implant surgery. To improve the ability of membranes, several types of membrane have been developed. Various materials have been utilized as regenerative membranes; however, all materials have disadvantages, and the ideal membrane material is yet to be identified. In these cases, a homologous gelatinized bone matrix(GBM) were used as a regenerative material in conjunction with the placement of endosseous root implants. 22 patients participated in this study, and 42 implants were inserted. The result of 1st operative surgery was uneventful, inflammatory reaction and dehiscences were not observed except for only one case. After the final protheses, all implants were functioning successfully. The major advantages in the use of GBMs for guided bone regeneration are of very wide application such as membrane and graft material, and that a second procedure to remove the material is not necessary, and the GBMs are accepted by the surrounding tissues without complications. The purpose of this study was to observe the usefulness of GBMs in dental implant surgery.

• 대한핵의학회지
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• 제31권3호
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• pp.365-371
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• 1997

The aim of this study is to evaluate the efficiency of the pulmonary perfusion scan(Pp scan) in the experimental animal single lung transplantation. Eight left lung transplanted mongrel dogs were included in this study. The serial Pp scan with 111MBq $^{99m}TC-MAA$ were done at the periods of immediate postoperative period, POD 3 days, and POD 10-14 days and finally autopsy was done in each cases. The transplanted lung perfusion was analysed as a percentage radioactivity of trans planted/native lung(T/N) ratio. The Pp scan of a donor mongrel dog was used as a reference(left/right lung (T/N) ratio 85.2%). The average T/N ratio of all cases on immediate postoperative state(reperfusion injury) : 19.2%, three acute rejections. 12.6%, three bronchial dehiscences 6.1% and two pulmonary thromboses : 2.0%. Two cases showed moderate improvement of reperfusion injury as increasing the T/N ratio in POD 3 days Pp scan. The T/N ratio showed sequentially decreased in six cases. As a conclusion, the Pp scan could be a non-invasive method in the evaluation of the experimental one-lung transplanted mongrel dog.

• Archives of Plastic Surgery
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• 제34권2호
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• pp.203-208
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• 2007

Purpose: Myocutaneous flap was widely used for trochanteric pressure sore but it had many drawbacks such as donor site morbidity, dog-ear deformity and functional muscle sacrifice. We have performed fasciocutaneous flap based on perforating vessels and succeeded in overcoming its drawbacks. Methods: We experienced 11 cases of perforator-based fasciocutaneous flap for the coverage of trochanteric pressure sore in 9 patients, 2 cases of which were bilateral. The ambulatory status of patient group is as follows: 6 of them used a wheelchair, 2 of them are free walking, 1 of them use a wheelchair or crutches. Flap was supplied by cutaneous perforating vessel of descending branch of the lateral circumflex femoral artery and the third perforating artery of the deep femoral artery. The size of wounds were from $4{\times}6.5cm$ to $10{\times}13cm$. Results: We did not find any flap loss or congestion except 2 partial wound dehiscences and 1 wound infection. Donor site morbidity was not found. We observed no recurrence of the pressure sore during the 2.5 year follow-up period. Conclusion: We considered that perforator-based fasciocutaneous flap could overcome the traditional drawbacks of the conventional myocutaneous flap and its modified flap for trochanteric pressure sore. And this flap has many advantages for covering trochanteric pressure sore without any donor site deformity and morbidity, which would greatly improve the aesthetic result.

• 대한두경부종양학회지
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• 제7권2호
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• pp.120-128
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• 1991

Reconstruction of the pharynx and cervical esophagus presents a tremendous surgical challenge to the Head and Neck Surgeon. Because life expectancy of patients with advanced carcinoma of the hypopharynx, and cervical esophagus is limited, treatment must be aimed at palliation. A variety of techiques have been proposed over the years with none proving entirely satisfactory. These techiques include prosthesis; skin graft; cervical flaps; tubed cutaneous and myocutaneous chest flaps; visceral reconstruction with stomach, colon. and jejunum; and jejunal free autografts. Many factors dictate the best method of reconstruction in any given clinical situation. The goal of the surgery is a one-stage reconstruction of swallowing function with minimal morbidity to allow as short a hospital stay as posible. Nine patients underwent the free jejunal autograft reconstruction of the pharyngoesophagus after the ablative surgery for the advanced hypopharyngeal cancer. Postoperative complications included one perioperative death, two abdominal wound dehiscences, two neck hematomas, one carotid rupture, one funtional dysphagia, one late strictures. There were no graft failure, no immediate stenosis and no fistula. An oral diet was started between days 8 and 16, with an average of 9 days and median of 8 days. Patients left the hospital between days 9 and days 38, with an average of 23.4 days and median of 23 days. This method of reconstruction is advocated as reliable palliative procedure with short-term follow-up. In conclusion, we at Korea Cancer Center Hospital are of the opinion that the free jejunal autograft offers an excellent, safe and relative easy method of the pharyngeal and cervical esophageal reconstruction with significant advantages over other techiques.

• 대한골관절종양학회지
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• 제6권1호
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• pp.10-16
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• 2000

목적 : 상지에 발생한 악성 및 침윤성 종양에서 분절절제 및 재접합술을 시행후 그 결과를 보고하고자 한다. 대상 및 방법 : 1986년부터 1994년까지 상지에 발생한 악성 및 침윤성 종양으로 분절절제 및 재접합술을 시행한 10례를 대상으로 평균 7년 7개월(3년 4개월~10년 2개월)간 추적하였다. 수술의 적응증은 절단 외에는 적절한 절제방법이 없는 stage II B의 종양을 대상으로 하였다. 종양의 종류는 연골육종이 3례, 골육종이 2례, 병적 골절을 동반한 거대세포종이 2례 동맥류성 골낭종을 동반한 광범위한 연골아세포종, 병적 골절을 동반한 광범위 유잉육종, 연부조직 및 골을 침범한 평활근육종이 각각 1례씩이었다. 종양의 발생부위는 근위 상완골이 6례로 가장 많았고 견갑골 3례, 전완부의 연부조직 1례였다. 10례중 7례에서 광범위 절제술을 시행하였고 3례에서는 변연절제술을 시행하였다. 결과 : 다발성 전이로 수술후 40개월에 사망한 1례를 제외하고 9례에서 종양의 국소재발이나 전이는 없었다. 최종추시시 상지의 평균기능점수는 65%(43~90%)였고, 수부의 파악력은 정상측에 비하여 평균 75%(28~95%), 집는 힘은 평균 82 %(63~100%)였다. 수술후 합병증으로는 3례에서 상처의 이개가 있었으나 치유되었고, 1례에서 수술후 요골신경의 마비소견이 보였으나 수술후 3개월에 신경기능은 회복되었다. 결론 : 상지에 발생한 악성 및 침윤성 종양의 치료로서 분절절제 및 재접합술은 선택적인 환자에서 절단술 대신에 부분 상지 구제술로서 추천할 수 있는 방법으로 사료된다.