• Journal of Periodontal and Implant Science
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• v.32 no.2
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• pp.291-302
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• 2002

In most of the previous studies, invasive and discrete techniques have been used to monitor the healing process of the gingival graft. However, Laser Doppler Flowmetry(LDF, floLAB(R), Moor Instruments Ltd., England) is a non-invasive technique for measurement of blood flow in the tissue and also allows continuous monitoring. Thus, we tested the usefulness of LDF in monitoring the healing process of free gingival graft at gingival recession. Eleven gingival graft site of 7 patients, including 5 males and 2 females, aged between 21 and 41 years (mean age 28.5) were monitored for the blood flow. The blood flow in gingival graft at coronal site, central site, apical site, mesial site and distal site was measured using LDF. Blood flow was measured at 1- week, 2- week, 3- week and 4- week after gingival graft surgery from 10 a.m. to 2 p.m. Time-course of the healing process was evaluated by statistical analysis using repeated ANOVA and Duncan test. The results were as follows : (1) Blood flow stayed increased for 2 weeks, and then, it was a tendency to decrease. (2) The blood flow at distal site had always higher than mesial site during the measuring periods. (3) The blood flow was high orderly after 1 week ; most coronal site, most apical site, central site. But that was high orderly after 2 week, 3 week, 4 week ; most coronal site, central site, most apical site. In conclusion, LDF was a useful and clinically adaptable method to monitor wound healing process. Our study suggested that it was important to protect surgical site to promote initial wound healing.

• The Journal of the Korean bone and joint tumor society
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• v.6 no.1
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• pp.30-34
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• 2000

Giant cell tumor of the small bones of the hands and feet is rare. Giant cell tumors in these locations develop at young age, are more commonly multifocal, and show the higher risk of recurrence than those at the end of the long bone. It should be differentiated from the other lesions of the hands, such as giant cell reparative granuloma, aneurysmal bone cyst and enchondroma. We experienced a case of giant cell tumor in the proximal phalanx of the left hand with swelling and pain. Curettage and bone graft were performed. Histologically large number of giant cells were distributed diffusely in the highly cellular stroma containing sheets of mononuclear cells. Secondary aneurysmal bone cyst and hemorrhage were associated.

• Archives of Reconstructive Microsurgery
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• v.11 no.1
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• pp.67-72
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• 2002

Purpose : Treatment of giant cell tumor of distal radius can be treated in several ways according to the agressiveness of the tumor. We treated 3 cases of widely involved giant cell tumor of distal radius with wide resection and proximal fibular graft and report the results with review of literatures. Material and Method : We have treated 3 cases of giant cell tumor of the distal radius since last 1990. Among 3 cases, two cases were grade III radiologically and treated by wide resection of distal radius and vascularized proximal fibular graft, and one case, grade II radiologically, treated by distal radial resection and non-vascularized proximal fibular graft. We followed up clinical results of above three cases 9 years, 12 years and 2 years. Result : In all three cases, tranplanted fibula graft showed solid union but grade III tumors recurred at 4 year and 6 year postoperatively. One of the case which recurred 4 year later was treated with secondary wide resection and wrist fusion with autogenous iliac bone graft, and didn't show any recurrent finding for these 5 years after re-operation. And another grade III, which recurred at 6th post-operative year, is under follow-up for 6 years after recur without 2nd operation. Grade II case didn't show any recurrent findings on 2 year follow-up. Conclusion : Grade III cases recurred at 4 year and 6 year follow-up. The cause of recurrence was thought to be invasion of remaining tumor cell in the soft tissue. To prevent recurrence, complete resection of primary tumor was necessary.

• Journal of Veterinary Clinics
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• v.32 no.5
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• pp.417-421
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• 2015

Bone grafting is widely used to bridge major bone defects or to promote bone union. Natural calcium carbonate (CC) has been used as a bone substitute material and used to scaffold for bone morphogenetic protein (BMP). The aims of this study is to evaluate the biocompatibility of cuttlebone (CB) and hydroxyapatite from CB (CBHA). Each material was shaped into disks (5 mm in diameter and 2 mm in thickness). To test biocompatibility, the disks were implanted into the dorsal subcutaneous tissue in mice. Fibrous capsule thickness around each disk was evaluated histologically at 2 and 4 weeks after implantation. Concerning biocompatibility, fibrous capsule thickness of CBHA was significantly thinner than that of CB and CHA (p < 0.05) at 2 and 4 weeks after implantation. Based on the clinical and histological results, CBHA would be a safe material for use inside the body and has more effective osteoconduction than CB.

• Journal of Chest Surgery
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• v.31 no.6
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• pp.629-633
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• 1998

Implantation of malignant cells along the needle aspiration tract is an extremely rare potential complication following a percutaneous fine needle aspiration biopsy of a lung carcinoma. The dissemination of malignant cells by a needle aspiration biopsy may convert an operable and potentially curable lesion into a fatal disease. We report two cases of chest wall implantation of carcinoma of the lung after a thin needle aspiration biopsy. A fifty-five year old male was successfully treated by a radical full-thickness excision of the chest wall and immediate reconstruction with the latissimus dorsi musculocutaneous island flap. A sixty-eight year old female was treated with a partial-thickness excision of the chest wall and skin graft due to superimposed infection and ulceration of the metastatic chest wall carcinoma. One case lived for 31 months up to November 1994, and the other's condtion has been uneventful for 3 months up to now.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.2
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• pp.294-302
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• 2009

In this paper, the trend of technology and the business strategy on 'Hearing Aids' are investigated for the industry promotion of medical devices based on IT engineering from the 316 patents of 'Hearing Aids' registered in Korean Intellectual Property Office(KIPO). The classification of technology on 'Hearing Aids' is performed according to the IPC(International Patent Classification) code to and the core technology of 'Hearing Aids' As the results of classification of IPC code, the number of patents with IPC code 'H04R', 'H04B', 'H01M', and 'A61F' are 160, 46, 40, and 19 respectively. We found that the Digital technology and the Medical Transplants technology are come to the front of 'Hearing Aids' and the foreign 'Hearing Aids' companies are filed an application with the Korean Intellectual Property Office(KIPO) before their business.

• Archives of Plastic Surgery
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• v.32 no.4
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• pp.485-490
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• 2005

Fingertip is the end of tactile organ and the part of hand most frequently injured. Fingertip injuries should be evaluated on an individual basis considering patient's overall physical condition, medical history, etiology, time of injury, and anticipated future hand use, and accordingly one of various methods of reconstruction should be selected. Complications after the reconstruction of fingertip injuries have been reported as pain, hypersensitivity, numbness, distal paresthesia, cold intolerance, and atrophy. From January to December 2002, dermofat grafts were performed on 15 patients to correct painful fingertips after injury. The thickness of the soft tissue of fingertip was measured both preoperatively and postoperatively with simple X-ray. To evaluate the improvement of pain, visual analogue scale(VAS) was used through the direct interview with patients. The average of postoperative follow-up period was 10.9 months. The average of increased soft tissue thickness ratio was 88.4%(2.3mm to 3.8mm). The average of preoperative VAS was 7.6, and postoperative VAS was 3. Dermofat graft on fingertip needs a further long-term follow-up study for the absorption ratio of dermofat, however, this procedure is simple and could be done under local anesthesia, and would be a useful alternative procedure to correct painful fingertips with the soft tissue atrophy after injury.

• The Journal of Korean Academy of Prosthodontics
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• v.58 no.4
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• pp.363-368
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• 2020

The prosthesis of the implant installed in inappropriate positions presents aesthetic and functional problems. If the implants are placed in the wrong position, re-implantation is often limited. There are surgical and non-surgical methods for resolving complications without re-implantation. The surgical costs, healing time, discomfort and unpredictability make this choice unpopular. On the other hand, a gingival mask has the advantage of solving complications quickly and simply. The patient was a 80-year-old male with palatally installed implant in maxillary anterior region and dissatisfied with his unesthetic philtrum and food impaction between the upper lip and the prosthesis. It was difficult to predict the prognosis of surgical operation, and the patient wanted treatment economically and physically burdenless because of his age and financial situation. Thus, the gingival mask was planned and the results were satisfactory.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.13 no.2
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• pp.153-159
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• 1991

The use of the autogenous free fat is a well-known procedure to fill in superficial depressions resulting from the traumatic or congenital defects. The major donor site for this procedure was the abdominal subcutaneous fat or buttocks. In 1977, Egyedi was the first to report the use of the buccal fat pad as a pedicled graft. The buccal fat pad is a structure usually considered to be a nuisance when encountered in intraoral procedures such as facial bone osteotomies, elevation of buccal falp, or procedures on Stensen's duct. In these operations, appearance of the buccal fat pad complicates surgical exposure. The buccal fat pad is a lobulated convex mass of fatty tissue covered by a very delicate membrane, and is described as having a body from which four processes extend. These projection serve as a filling material between the various muscular structures in the area. Recently malar depression was augmented with the pedicled buccal fat pad in 3 cases, and it was used for the reconstruction of the nasolabial fold in one case.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.36 no.1
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• pp.39-42
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• 2010

Maxillary sinus lift and bone graft are used to reconstruct atrophic maxilla molar area for endosseous dental implants. Many different grafting materials and techniques can be used for maxillary sinus bone graft. Bio-$Oss^{(R)}$ has been proposed as bone substitute and successfully utilized as osteoconductive filler. Platelet rich plasma (PRP) is an autologous material with many growth factors, such as PDGF, TGF-$\beta$, IGF, VEGF, facilitating bone healing process. And Platelet poor plasma (PPP) is the by-product in procedure of producing PRP. Six rabbits were used as experimental animal. Both maxillary sinus were grafted with Bio-$Oss^{(R)}$ and PRP, and Bio-$Oss^{(R)}$ and PPP. Rabbits were sacrificed at 4, 8 and 12 weeks. The grafting sites were evaluated by histomorphometric analysis. As a result, using PRP showed excellent bone formation in the early stage, but no further significant effect after that. In late stage, the ability of bone formation of using PRP was even worse than using PPP. The further studies need to be considered in this case.