TG Osseotite 임플란트의 성공률에 대한 임상적 연구

오승환,민승기,채영원,Oh, Sung-Hwan,Min, Seung-Ki,Chae, Young-Won 대한악안면성형재건외과학회 2005 Maxillofacial Plastic Reconstructive Surgery Vol.27 No.1

The purpose of this study is to review the prognosis of the TG Osseotite implant(3i Co, USA) placed in partial edentulous area of oral cavity and to suspect the possible causes leading to failure. 124 TG Osseotite implants that had been inserted between 2000 - 2002 were followed up for 2 years(avg : 9.5 months) in function. Medical records, and radiographs were evaluated and analyzed by the over all success rate, gender and age factor, general disease, implant fixture length and diameter, implant site, bone density, and various surgical methods. Chi square test was used statistically. Of the 124 TG Osseotite implants, 9 implants(7.3%) were removed in early phase and 3 implants(2.4%) were in late phase. The cumulative survival rate was 90.2%. The failure of the TG Osseotite implant was closely related with the use of bone graft techniques such as sinus elevation or immediate implantation and not with the age, sex, general disease, implant site, bone density of implanted site. The failure of the TG Osseotite implant was well developed when it was the wide type of implant and it was inserted for single tooth replacement. The developement of peri-implantitis was the most important factor in the failure of the TG Osseotite implant.

가토의 상악동 골이식술시 미분화 간엽 줄기세포의 골형성 효과

오승환,채영원,김범수,여인범,조필귀,Oh, Sung-Hwan,Choi, Young-Won,Kim, Bum-Soo,Yeo, In-Bum,Jo, Pil-Kwy 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.6

Undifferentiated mesencymal stem cells(UMSCs) have been thought to be multipotent cells that can replicate as undifferentiated cells and that have the potential to differentiate into lineages of mesenchymal tissue including the bone, cartilage, fat, tendon, muscle, and marrow stroma. It can be used to sinus lifting, Guided bone regeneration, other bone graft in dental part. The purpose of this study is to evaluate the effect of mesencymal stem cells on sinus augmentation with autogenous bone, fibrin glue mixture in a rabbit model. 8 New Zealand white rabbits were divided randomly into 4 groups based on their time of sacrifice(1, 2, 4 and 8 weeks). First, undifferentiated mesenchymal stem cells were isolated from iliac crest marrow of rabbits and expanded in vitro. cell culture was performed in accordance with the technique described by Tsutsumi et al. In the present study, The animals were sacrificed at 1, 2, 4 and 8 weeks after transplantation, and the bone formation ability of each sides was evaluated clinically, radiologically, histologically and histomorphologically. According to the histological observations, Stem cell group showed integrated graft bone with host bone from sinus wall. At 2 and 4weeks, It showed active newly formed bone and neovascularization. At 8 weeks, lamella bone was observed in sinus graft material area. Radiologically, autobone with stem cell showed more radiopaque than autobone without stemcell. there were significant differences in bone volume between 2 and 4 weeks (p<0.05). In summary, the autobone with stem cells had well-formed, newly formed bone and neovasculization, compared with the autobone without stem cells (esp. 2 weeks and 4 weeks) The findings of this experimental study indicate that the use of a mixture of mesenchymal stem cell yielded good results in osteogenesis and bone volume comparable with that achieved by autogenous bone. Therefore, this application of this promising new sinus floor elevation method for implants with tissue engineering technology deserves further study.

하악우각부골절에서 제3대구치의 역할에 관한 통계적 연구

오승환,Oh, Sung-Hwan 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.3

Purpose : This study attempted to relate the incidence of fractures at the mandibular angle with the presence and state of eruption of lower third molars, and to find out the real risk factors for angle fractures in the states of lower third molars. Materials and Methods : Medical records and radiographs of 395 patients with mandibular fractures were retrospectively reviewed. The presence and states of third molars were assessed for each patients and related to the occurrence of angle and other mandibular fractures. Results : Of 395 patients with mandibular fractures, 142 had angle fractures. The incidence of angle fractures was found to be significantly greater when partial erupted lower third molars were present and it had a definite role for risk factors for angle fractures. But there were no clear relationship between the incidence of angle fracrtures and states of without, fully erupted lower third molars. Furthermore, the states of patial and unerupted lower third molar had an effect on bony segment displacement. Conclusions : This study provides clinical evidence to suggest that patial erupted third molar teeth weaken the mandibular angle both quantitatively and qualitatively.

악교정 수술 중 발생한 지연성 악성 고열증의 치료

오승환,민승기,권경환,조필귀,송윤강,Oh, Sung-Hwan,Min, Seung-Ki,Kwon, Kyung-Hwan,Jo, Pil-Kwy,Song, Yun-Kang 대한악안면성형재건외과학회 2005 Maxillofacial Plastic Reconstructive Surgery Vol.27 No.4

Malignant hyperthermia is a catastrophic, hypermetabolic syndrome that arises in susceptible individuals when they are exposed to certain inhalational anesthetics or muscle relaxants. It is characterized by hyperthermia, tachycardia, acidosis, and muscle rigidity. It has been noted that the majority of cases of malignant hyperthermia are fatal unless early diagnosis and treatment are performed. We experienced a 24 year old male Malignant hyperthermia presented for orthognathic surgery under $O_2-N_2O$-sevoflurane anesthesia without succinylcholine. Two half hours after induction, tachycardia developed and was followed by unstable blood pressure and hyperpyrexia. Anesthesia was terminated and vigorous emergency treatment was attempted. The patient was treated by the intravenous administration of dantrolene sodium. The diagnosis of an acute malignant hyperthermia reaction by clinical criteria can be difficult because of the nonspecific nature and variable incidence of many of the clinical signs and laboratory findings. So the malignant hyperthermia clinical grading scale is recommended for use as an aid to the objective definition of this disease. This clinical grading system provides a new and comprehensive clinical case definition for the malignant hyperthermia syndrome. We recently encountered a case of delayed malignant hyperthermia during sevoflurane anesthesia that was successfully treated by the intravenous administration of dantrolene sodium. In conclusion, exposure to sevoflurane should be avoided in patients thought to be susceprible to malignant hyperthermia.

Thin Block and Chip Bone Graft Technique을 이용한 치조골 수직 증강술 : 증례보고

오승환,Oh, Sung-Hwan 대한악안면성형재건외과학회 2008 Maxillofacial Plastic Reconstructive Surgery Vol.30 No.1

It would be desirable to regenerate bone vertically in a predictable way; such a technique would allow for more favorable implant - crown ratio and better esthetics for implant placement. Traditionally, several techniques has been proposed for this purpose including GBR with particulated bone and block bone graft using mandible or illium however, the efficacy of these techniques has not been firmly established because they have some week points or complications each other that it is difficult to draw firm conclusion for superiority. In recent years, We have treated 11-cases of vertical deficiency of alveolar bone using thin block and chip bone graft technique and the postoperative results showed good prognosis with few complications. So we report the results of its treatment and cases with review of literature.

장골과 경골의 자가입자망상골 이식에 관한 임상적 비교연구

오승환,Oh, Sung-Hwan 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.3

This is a clinical and retrospective study of 36 patients received the autogenous particulated cancellous bone grafts from anterior iliac and proximal tibial metaphysis and we compared the clinical postoperative complications in operation sites and donor site morbidity. The results of this study indicate that, in all our patients, the proximal tibia provided an adquate volume of cancellous bone and there were no special contraindications, in choosing and using the proximal tibia as a donor site in most oral and maxillofacial cancellous bone graft surgeries. Furthermore, the proximal tibial metaphysis would appear a more easily obtainable cancellous bone source and offer a superior clinical results than anterior iliac crest in donor site morbidity.

청옥산 삼림식생에 관한 연구 - 식물사회학적 분석방법으로 -

오승환,윤충원,배관호,홍성천 ( Seung Hwan Oh,Chung Weon Yun,Kwan Ho Bae,Sung Cheon Hong ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.1

The Mt. Cheongok is located at the northern part of Kyungsangpookdo from 37°00` 00`` to 37°05` 00`` latitude and from 128°55` 00`` to 129°00` 00`` longitude. The altitude of the summit is 1,276.5m. This study was carried out to classify forest communities by the methods of Zurich-Montepellier schools. And, it also might be useful for selection of plant species, forest conservation, and prompting vegetation succession. The forest vegetation in Mt. Cheongok was classified into 12 communities, 4 groups, and 4 subgroups. Rhododendron micranthum subgroup of Pinus densiflora for. erecta community and Fraxinus mandshurica community were not found in cool temperate forest, southern zone yet. According to the coincidence method, Pines densiflora for. erecta community was mainly distributed from altitude 450m to 1,100m and from upper slope to ridge, and Quercus mongolica community was dominanced in the range of over altitude 700m. Pinus densiflora for. erecta community, distributed in upper slope and ridge, is judged to be maintained in the future. But Pinus densiflora for. erecta community, distributed in below middle slope, is judged to be changed into deciduous hardwood forest.

청소년의 자살충동 결정요인 분석

오승환(Oh, Sung Hwan),이창한(Lee, Chang Han) 한국범죄심리학회 2010 한국범죄심리연구 Vol.6 No.2

본 연구는 울산지역 청소년의 자살충동에 미치는 결정요인을 규명하여 자살충동을 억제할 수 있는 정책적 대안을 제시하는 것이다. 분석결과 청소년의 자살충동에 영향을 미치는 요인은 개인적 요인 중에서는 성과 연령, 우울과 흡연, 음주 경험이, 가족변수로는 부모의 학대, 부정적 부모관계, 반사회적 가족 구성원, 가족해체 여부등이 영향을 미치는 것으로 나타났다. 또래의 비행은 영향을 미치는 것으로 나타났으나 학교의 보호요소는 영향을 미치지 않는 것으로 나타났다. 이와 같이 청소년의 자살충동은 단순한 하나의 원인에서 발생하는 것이 아니라 다양한 원인에 의해 발생하고 있음을 알 수 있다. 따라서 청소년 자살에 대한 대책은 여러 원인에 대한 체계적인 개입방법을 통해 가능하다. 본 논문에서는 청소년 자살 예방대책, 청소년 자살 위기개입대책, 자살시도 청소년 긴급구조대책, 청소년 자살 사후개입대책 등이 제시되었다 The purpose of this study is to explore impulsive suicide risk factors and to provide policy implication for suicidal behavior. The results of this study indicate two major factors: a) individual and b) family. Individual factors included sex, age, depression and smoking, and experience alcohol. Family factors included parental abuse, negative parent-child relationship, anti-social family, family break-up. Peer delinquency indicate statistically significant relationship with suicide, however school protection factors are not. Therefore there is no one good way to explain impulsive suicide risk factors, various factor related together. This study provides several types of policy implication to deter suicidal behavior. This policy implication includes juvenile suicide prevention, juvenile suicide crisis intervention, juvenile suicide attempt emergency rescue, and juvenile suicide countermeasure.

임상원저 : 상악골 전벽골 결손에 대한 재건술에 있어서 동결건조 콜라겐 매식과 소강판고정술의 임상적 유용성

오승환(Sung Hwan Oh),장관식(Kwan Sik Chang),조병호(Byung Ho Jo),민승기(Sung Ki Min),이동근(Dong Kun Lee),김수남(Su Nam Kim) 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

Maxilla is located in midfacial area and has intimate relationship with adjacent anatomical structure such as nasal cavity, orbit, oral cavity, and zygoma. Skeletal defects of maxillary antral wall may be developed by various postoperative causes for comminuted maxillary fractures, tumors of head and neck area or cystic lesions of maxillary sinuses. If these bony defects are left untreated state, this results in several postoperative complications such as soft tissue impingement into bony defects or dysfunction of sinus mucosa. Hence, these defects should be pertinently treated as possible. The main purpose of such surgery is to preservation of normal physiologic function of maxillary sinus. In the past, a variety of materials have been used to reconstruct defects of the maxillary antral wall. Alloplastic materials are popular today because of availability without an additional operation and their ease of use. With favorable results and review of related literatures, we report the availability of lyophilized collagen implantation and microplate fixation as the reconstructive surgical methods on the defects of maxillary anterior wall resulted from various reasons.

하악골의 외과적 확장

오승환(Sung-Hwan Oh) 대한치과의사협회 2013 대한치과의사협회지 Vol.51 No.6

The most common orthodontic methods of treating mandibular transverse deficiencies is extractions, interdental stripping, and other dento-alveolar compensation but it can not addressesd about skeletal problem This study assessed the treatment outcomes after surgically assisted rapid tooth orthodontics using the symphysis osteotomy and dentoalveolar distraction osteogenesis technique. The applications of distraction osteogenesis in mandibular widening, by symphysis osteotomy, has emerged as a definitive, predictable and better stability. The most important factors in mandibular widening is performed with simple surgical technique and devices. As a results, these techniques are very useful and effective in cases of difficult tooth movement in adult orthodontics transverse problems There were few intraoperative or postoperative complications and were not clinically significant.