• Journal of Korean Dental Science
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• 제2권2호
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• pp.31-34
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• 2009

The survival rate of the OSSTEM GS II Implant 1 year after serving the prosthetic function in 2 domestic and foreign medical institutes was 97.57%; the success rate was 95.7%, and the average alveolar bone resorption was 0.24mm(n=389). In particular, the alveolar bone resorption occurred differently according to the placement location as well as whether or not the patient underwent bone grafting operation, but the implant s length and diameter did not have significant impact on alveolar bone resorption.

• 대한치과의사협회지
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• 제48권1호
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• pp.56-62
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• 2010

In recent years, a number of special treatment procedures have been introduced to reestablish new tooth supporting tissues with varying degrees of success including guided tissue regeneration(GTR), bone grafting(BG) and the use of enamel matrix derivative(EMD). EMD is an extract of enamel matrix and contains amelogenins of various molecular weights. Emdogain(EMD) might have some advantages over other methods of regenerating the tissue supporting teeth lost by gum disease, such as less postoperative complications. Emdogain contains proteins(derived from developing pig teeth) believed to regenerate tooth attachment. The decrease in probing depth after EMD treatment is achieved primarily by clinical attachment gain and bone regeneration and only to a minor extent by gingival recession. In conclsion, EMD seems to be safe, was able to regenerate lost periodontal tissues in previously diseased sites based on clinical parameters.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제39권
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• pp.5.1-5.9
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• 2017

Many congenital and acquired defects occur in the maxillofacial area. The buccal fat pad flap (BFP) is a simple and reliable flap for the treatment of many of these defects because of its rich blood supply and location, which is close to the location of various intraoral defects. In this article, we have reviewed BFP and the associated anatomical background, surgical techniques, and clinical applications. The surgical procedure is simple and has shown a high success rate in various clinical applications (approximately 90%), including the closure of oroantral fistula, correction of congenital defect, treatment of jaw bone necrosis, and reconstruction of tumor defects. The control of etiologic factors, size of defect, anatomical location of defect, and general condition of patient could influence the prognosis after grafting. In conclusion, BFP is a reliable flap that can be applied to various clinical situations.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제47권1호
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• pp.57-61
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• 2021

Immediate implant placement (IIP) in fresh extraction sockets exhibits similar survival and success rates to delayed implant placement in healed sockets. Several advantages of IIP involve shortened total treatment time, reduction of the number of invasive surgeries, and subsequent reduction of patient discomfort due to lack of additional surgeries. The major shortcomings in IIP, however, include the inability to obtain early bony support, presence of a gap between the extraction socket and fixture, and the inability to cover the fixture with soft tissue, leading to increased risk of infection and implant loss. When IIP is performed, atraumatic or minimally traumatic extractions, conservation of the septal bone in molars, minimal flap elevation or flapless surgery, bone grafting the gap between the fixture and the extraction socket, and coverage with soft tissue or a membrane must be considered.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권5호
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• pp.232-239
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• 2015

Objectives: The purpose of this study was to estimate the volumetric change of augmented autobone harvested from mandibular body cortical bone, using cone-beam computed tomography (CBCT) and three-dimensional reconstruction. In addition, the clinical success of dental implants placed 4 to 6 months after bone grafting was also evaluated. Materials and Methods: Ninety-five patients (48 men and 47 women) aged 19 to 72 years were included in this study. A total of 128 graft sites were evaluated. The graft sites were divided into three parts: anterior and both posterior regions of one jaw. All patients included in the study were scheduled for an onlay graft and implantation using a two-stage procedure. The dental implants were inserted 4 to 6 months after the bone graft. Volumetric stability was evaluated by serial CBCT images. Results: No major complications were observed for the donor sites. A total of 128 block bones were used to augment severely resorbed alveolar bone. Only 1 of the 128 bone grafts was resorbed by more than half, and that was due to infection. In total, the average amount of residual grafted bone after resorption at the recipient sites was $74.6%{\pm}8.4%$. Conclusion: Volumetric stability of mandibular body autogenous block grafts is predictable. The procedure is satisfactory for patients who want dental implants regardless of atrophic alveolar bone.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제45권6호
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• pp.332-342
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• 2019

Objectives: Socket grafting is vital to prevent bone resorption after tooth extraction. Several techniques to prevent resorption have been described, and various bone graft substitutes have been developed and used with varying success. We conducted this pilot study to evaluate the performance of nanohydroxyapatite (nHA) derived from chicken eggshells in socket preservation. Materials and Methods: This was a prospective, single center, outcome assessor-blinded evaluation of 23 sockets (11 patients) grafted with nHA and covered with platelet-rich fibrin (PRF) membrane as a barrier. Bone width and radiographic bone density were measured using digital radiographs at 1, 12, and 24 weeks post-procedure. Postoperative histomorphometric and micro-computed tomography (CT) evaluation were performed. The study protocol was approved by the Institutional Ethics Committee. Results: All patients had uneventful wound healing without graft material displacement or leaching despite partial exposure of the grafted socket. Tissue re-epithelialized with thick gingival biotype (>3 mm). Width of the bone was maintained and radiographic density increased significantly with a trabecular pattern (73.91% of sockets) within 12 weeks. Histomorphometric analysis showed 56.52% Grade 3 bone formation and micro-CT analysis revealed newly formed bone with interconnecting trabeculae. Conclusion: Use of a PRF membrane with nHA resulted in good bone regeneration in sockets. Use of a PRF membrane prevents periosteal-releasing incisions for primary closure, thereby facilitating the preservation of keratinized mucosa and gingival architecture. This technique, which uses eggshell-derived nHA and PRF membrane from the patient's own blood, is innovative and is free of disease transfer risks. nHA is a promising economic bone graft substitute for bone regeneration and reconstruction because of the abundant availability of eggshell waste as a raw material.

• 한국의류학회지
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• 제31권9_10
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• pp.1418-1430
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• 2007

To strength global competitivenss and raise reputation in times of globalization, the practical use and development of traditional culture which must be discriminated against other countries wedging their ways. The purpose of this study is, 1. Make the mutual relationship between globalization of Korean traditional clothing(Hanbok) and the strean of the international fashion clear. 2. Deduce a common primary fact through commonness of international great products and a success of globalization in Asian nations 3. Suggest a scheme for globalization of Korean traditional clothing from the flank of a design and a policy on the basis of analysis. The consequence of this study is, 1. In the situation that modern international fashion focused Re-Orienting Fashion, Korean traditional clothing-Hanbok is considered as the most priceless value of application for an effective design sauce to differentiate.2. The common point between International leading fashion brands and success of globalization of each Asian nation is to pursuit an effective marketing strategy through a proper harmony with a differentiated 'uniqueness' which is motivated from their tradition, a sense of modern trend reading, and a 'generality' which fits in their lige styles. In consequence, we must develop typical design factors to be connected directly with Korean traditional image from the flank of design, For this, the typical design factors need to be applied with grafting tradition and modern ideas, simplicity, convenience, fleshly senses, and youth.

• Archives of Plastic Surgery
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• 제47권5호
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• pp.444-450
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• 2020

Background Fingertip injuries are the most common type of traumatic injury treated at emergency departments and require prompt and adequate interventions for favorable wound survival outcomes. Hyperbaric oxygen (HBO₂) therapy is well known for its many positive effects on wound healing. We hypothesized that treatment with HBO₂ would improve the graft survival outcomes of amputated fingertip injuries treated with composite grafts. Methods This retrospective observational study included fingertip amputations that were treated between January 2013 and December 2017. A conventional group and an HBO₂ therapy group were statistically compared to evaluate the effect of HBO₂ treatment. Graft survival was categorized as either success or failure. Results Among 55 cases (digits), 34 digits were conventionally treated, while 21 digits were treated with HBO₂. No statistically significant differences were observed between the groups with regard to general characteristics. Among patients with guillotine-type injuries, the composite graft success rate was statistically significantly higher in the group that received HBO₂ therapy than in the conventional group (P=0.0337). Overall, the HBO₂ group also demonstrated a statistically significantly shorter healing time than the conventional group (P=0.0075). As such, HBO₂ treatment facilitates composite graft survival in cases of fingertip injury. Conclusions HBO₂ treatment was associated with an increased composite graft survival rate in guillotine-type fingertip injuries and reduced the time required for grafts to heal.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권5호
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• pp.278-286
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• 2023

Objectives: This review assessed the performance of implant-supported fixed hybrid prostheses in 21 patients who received a total of 137 implants between 2003 and 2010. The implants were evaluated for marginal bone resorption, complications, success rate, and survival rate based on their vertical angularity, type of bone graft, and measured implant stability. Materials and Methods: One-way ANOVA and chi-square tests were used to analyze the relationships among long-term evaluation factors and these variables. The mean initial bone resorption in the implant group with a vertical angle of more than 20° was 0.33 mm and mean final bone resorption was 0.76 mm. In contrast, the mean initial bone resorption in the implant group with a vertical angle of less than 10° was 1.19 mm and mean final bone resorption was 2.17 mm. Results: The results showed that mean bone resorption decreased with an increase in the vertical placement angle of the implants used in fixed hybrid prostheses, as well as in the group without additional bone grafts and those with high implant stability. The success rate of implants placed after bone grafting was found to be higher than those placed simultaneously. Conclusion: These results suggest that implant-supported fixed hybrid prostheses may be an effective treatment option for edentulous patients, and intentionally placing implants with high angularity may improve outcomes.

• Journal of Chest Surgery
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• 제35권3호
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• pp.182-187
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• 2002

배경: 그간 관상동맥 우회수술후의 관상동맥 조영술 결과는 주로 우회도관의 개존률에 초점을 맞추어 보고되어 왔다. 그러나 수술후의 관상동맥 조영술 검사로부터 얻을 수 있는 유용한 정보의 폭은 훨씬 넓으며, 이는 수술 전략 설정에 큰 도움을 줄 수 있으리라 생각된다. 대상 및 방법: 1994년 11월부터 1999년 3월까지 관상동맥 우회수술을 시행받고 퇴원한 환자 448명중 1개월 이상 경과후 관상동맥 조영술 추적이 이루어진 73명을 대상으로 하였다. 수술후 평균 10.6개월 경과시 관상동맥 조영술 검사가 시행되었고 검사 이유는 협심증의 잔존이나 재발이 54명, 심근관류검사나 초음파검사상의 이상이 13명, 단순한 추적목적이 6명이었다. 결과: 우회도관 개존률은 단순추적검사 환자들에서는 80.9%(내흉동맥 100%, 복재정맥 75.0%), 심근 허혈이 있는 것으로 판단된 환자들에서는 61.6%(내흉동맥 81.1%, 복재정맥 55.3%)였다. 50명(68.5%)의 환자에서 우회도관 조성 근위부의 관상동맥 내경협착이 20% 이상 진행한 곳이 한 군데 이상 나타났다. 수술 전 완전 폐쇄되지 않았던 201개의 관상동맥 분지중 95개(47.3%)에서 협착 정도가 20%이상 진행하였고 이중 64개(31.8%)는 완전 폐쇄로 진행하였다. 협착이 진행하는 빈도는 수술후 경과한 시간이나 수술전의 협착정도와는 연관이 없었고 우회도관이 폐쇄된 경우(36.3%)보다 개통되어 있는 상태(56.5%)에서 더 높게 나타났다(p<0.05). 내흉동맥과 복재정맥의 비교시 개존률(83.3% vs 56.6%) 뿐만 아니라 경피적 중재술이 필요한 경우 성공적으로 시행될 확률도 큰 차이를 보였다(100% vs 62%, p<0.05). 결론: 관상동맥 우회술 후 비교적 조기에 우회도관 조성 근위부의 관상동맥 협착이 진행하는 빈도가 상당히 높은 것으로 나타난 만큼 복재정맥의 불량한 장기 개존률을 고려할 때 중등도 이하의 협착을 가진 관상동맥 분지의 우회로 조성에는 신중을 기할 필요가 있다고 판단된다. 또한 본 연구 결과 관상동맥 우회수술시 좌전하행지 우회로의 중요성과 함께 내흉동맥의 우수성을 확인할 수 있었다.