• Archives of Reconstructive Microsurgery
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• 제15권2호
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• pp.70-76
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• 2006

This study investigated the clinical application of anterolateral thigh (ALT) perforator flap in reconstruction of soft tissue defect of lower extremity. There were twenty-one patients who had been taken soft tissue reconstruction with anterolateral thigh perforator flap. There were 19 males and 2 females between 3 and 65 years (mean, 36 years). This study included 4 cases of pedatric case of under 10-year-old. All cases were a cutaneous flap. Flap size averaged $160\;cm^2\;(20{\sim}450\;cm^2)$. 19 cases were musculocutaneous perforator flaps and 2 were septocutaneous perforator. T-shaped pedicle were used to reconstruct and to preserve major artery of lower extremity in 2 cases. 19 cases flaps survived completely and 2 cases flap were marginal necrosis partially. There was venous congestion in one case of type of reverse island flap but that was improved after salvage procedure with leech. While the donor sites were closed directly in 5cases, 16 cases underwent skin graft. ALT flap is suitable for coverage of defects in lower extremity where have various condition and reliable in children as in adult.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제29권4호
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• pp.366-371
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• 2007

Evaluation of the methods of processing allogenic bone must be considered in order to make an effective choice of graft materials in oral surgery. Allograft materials processed by the tissue banking industry have varying capacities of bone reconstruction. The biological function of processed bone can be affected by many factors, like particle size, processing parameters, and inclusion or exclusion of mineral and moisture. For example, freeze drying step offers a safe and economical means for packaging, shipping, storage, and preservation of homologous bone. Demineralization of cortical bone using hydrochloric acid can produce a uniform demineralized surface with a capacity for osteoinduction. The objectives of this review were to evaluate the processing methods for allogenic bone and to characterize processed materials for grafting. It is important to understand the biological, biomechanical healing of different types of allografts to make the right choice for allogenic bone on each clinical application and to achieve a successful outcome for alveolar bone reconstruction in oral surgery.

• Journal of Chest Surgery
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• 제53권6호
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• pp.411-413
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• 2020

A 34-year-old man who had undergone aortic valve replacement 8 years ago underwent an additional Bentall operation due to mechanical valve dehiscence 2 years later. Subsequently, he was diagnosed with Behçet disease and Batter syndrome. A week after being hospitalized again due to chest pain and dyspnea, a large pseudo-aneurysm was detected on computed tomography. Because of the excessively large size of the pseudo-aneurysm, surgical treatment seemed very risky. Therefore, we planned to perform thoracic endovascular aortic repair (TEVAR) and treated him successfully. However, the patient experienced recurrence of the same symptoms 4 months later, and was found to have type IV endoleak. He received a TEVAR procedure again, and it was successful.

• 한국산학기술학회논문지
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• 제10권4호
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• pp.759-764
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• 2009

본 논문에서는 다목적 시각 언어 시스템을 이용한 원스텝 모바일 쇼핑 시스템을 설계하였다. 다목적 시각언어 시스템은 점자에 그 기반을 두고 있으며, 이를 정방형 색상표로 나열하여 시각화시킴으로써, 사용의 편리성과 기본적인 개인 정보의 암호화를 동시에 이룰 수 있으며, 주고받는 정보의 양이 극히 미비하여 보다 빠른 시간에 통신이 가능한 이점도 가지고 있다. 설계된 원스텝 쇼핑 시스템은 이러한 다목적 시각 언어와 국내 성인의 대부분이 보유하고 있는 핸드폰을 접목시켜 이를-쇼핑에 적응시킨 것이다. 사용자는 TV나 PC 모니터, 인쇄물 등에 나타난 코드를 핸드폰의 카메라로 촬영한 후, 내장시킨 프로그램을 이용하여 접속 버튼을 누름으로써 원하는 쇼핑을 한 번에 끝낼 수 있도록 설계된 본 시스템을 이용하면 보다 빠르고 편하며 안전하게 원하는 상품을 구매할 수 있을 것이다.

• 폴리머
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• 제34권1호
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• pp.58-62
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• 2010

전분을 매트릭스 고분자로 하여 아크릴 단량체를 유화중합 방법으로 그래프트 중합하였다. 에멀젼의 점도와 입자경은 전분 함량이 증가함에 따라 전분의 히드록시기가 물과 상호작용하고 고분자 입자가 분산매인 물 쪽으로 팽윤함으로 인해 증가하였다. 에멀젼의 화학적 안정성은 전분 함량이 증가할수록 양호하였으나 내수성과 내알칼리성은 전분 함량이 증가할수록 친수성이 증가하면서 감소하였다. 탄산칼슘을 포함한 전분-아크릴 에멀젼 배합물의 불투명도는 전분의 함광이 증가함에 따라 전분 고유의 색깔에 의해 감소하였고 도막의 상태는 전분의 함량이 증가함에 따라 도막의 무정형 상태가 증가하면서 균열이 없는 매끈한 외관을 나타내었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제42권5호
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• pp.288-294
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• 2016

Chondrosarcoma is a malignant tumor that originates from cartilaginous cells and is characterized by cartilage formation. Only 5% to 10% of chondrosarcoma occurs in the head and neck area, and it is uncommon in the temporomandibular joint area. This report describes an unusual case with a rare, large chondrosarcoma in a 47-year-old woman who presented with painless swelling and trismus. Computed tomography showed a large mass approximately $8.5{\times}6.0$ cm in size arising adjacent to the lateral pterygoid plate and condyle. There were features suggestive of bone resorption. The tumor was resected in a single block with perilesional tissues, and a great auricular nerve graft was performed because of facial nerve sacrifice. Microscopic examination of sections stained with H&E revealed chondrocytes with irregular nuclei and heterogeneous hyper chromatic tumor cells embedded in the chondrocyte lacuna. The diagnosis was a grade I chondrosarcoma. There was no evidence of recurrence at the 8-month follow-up, and a reconstruction surgery with fibular osteocutaneous free flap was performed. We report this unusual entity and a review of the literature.

• 한국정밀공학회지
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• 제31권9호
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• pp.791-797
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• 2014

Abstract Scaffold used as a carrier of the cell has been actively conducted using plenty of technology in tissue engineering. ${\beta}$-tricalcium phosphate (${\beta}$-TCP) material has shown good biocompatibility and osteoconductive ability when it was implanted as a bone graft substitute in osseous defect in human and animal studies for bone regeneration. In this study, we fabricated the blended polycaprolactone (PCL) and ${\beta}$-TCP scaffold by the polymer deposition system (PDS). The PCL/${\beta}$-TCP scaffold was fabricated at a temperature of $110^{\circ}C$, pressure of 650 kPa, and scan velocity of 100 mm/sec. The Overall geometry and size of the scaffold were fixed circle type with a diameter of 10 mm and a height of 4 mm. PCL/${\beta}$-TCP scaffold was observed by scanning electron microscopy. Cell attachment and proliferation of the scaffold containing 30 wt% ${\beta}$-TCP was superior to those containing 10 wt% and 20 wt% ${\beta}$-TCP.

• Archives of Plastic Surgery
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• 제33권4호
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• pp.491-494
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• 2006

Purpose: To report the case of recurred malignant proliferating trichilemmal tumor on scalp Methods: Case report and literature review Results: A 40-year-old man presented with a recurred malignant proliferating trichilemmal tumor, which developed on the occipital area. It was $8{\times}9{\times}4.5cm$ in size, protruded, firm and non-tender mass. This tumor was widely excised including normal skin margin and pericranium. Immediate reconstruction using free latissimus dorsi muscle flap and skin graft were done. Histopathologic examination revealed abrubt, compact trichilemmal keratinization in the central area of lobular epithelial proliferation. Conclusion: There has been no recurrence of tumor during follow-up period of nine months without adjuvant chemotherapy or radiotherapy.

• 대한두개안면성형외과학회지
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• 제19권1호
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• pp.79-82
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• 2018

Formation of an ideally-shaped tragus remains one of the most challenging issues during staged tragus reconstruction in microtia patients. The authors describe a new method used to treat a unique case of concha-type microtia in which the 10-year-old male patient had only a portion of pre-existing cartilage at the tragus site. An anomalous skin lump was also present. During the initial stages of the reconstruction, the two-stage Nagata method was used for surgical correction of the microtia. An autologous rib cartilage graft was used to form the ear framework. A temporoparietal fascia flap was also constructed. Remnant skin tags and anomalous cartilage that accompany microtia are usually removed during microtia repair. However, the cartilage and skin lump were preserved during the reconstruction. The skin lump was later used to form a vascularized chondrocutaneous island flap that supplemented the portion of cartilage during tragus formation. The result was a new tragus that was satisfactorily improved in both size and shape. Patients with concha-type microtia may benefit from the use of this new method for tragus formation.

• Archives of Reconstructive Microsurgery
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• 제25권2호
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• pp.69-71
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• 2016

Reconstruction of the lower extremities is difficult due to a lack of skin laxity and muscular tissues. Here, we present a case of lower extremity reconstruction via the anterior tibial artery perforator based segmental muscle island flap. Our patient was a 75-year-old male with a chronic ulcerative wound on the right lower leg from an old car accident. A $5.0{\times}0.5cm$ size ulcerative wound with tibial bone exposure was noted. We planned to reconstruct the lower extremity defect with a free flap, but the vessel status was severely compromised intraoperatively. Thus, we found the anterior tibial artery perforator using Doppler ultrasound, elevated the tibialis anterior muscle segment flap, and transposed it to cover the defect successfully. The flap presented with a nice contour and the skin graft covering the flap survived completely. There were no complications of the surgical site at three months follow-up and no gait morbidity. This is a meaningful case applying the concept of segmental muscle flap based on a perforator that had advantages including proper bulkiness, vascularization, and preservation of function, which were well applied, leading to great success.