하악골 골절의 원인과 양상에 관한 연구

정일혁,한기덕,서제덕,황경균,Chung, Il-Hyuk,Han, Ki-Deok,Suh, Je-Duck,Hwang, Kyung-Gyun 대한악안면성형재건외과학회 2005 Maxillofacial Plastic Reconstructive Surgery Vol.27 No.5

This study investigated the mandibular fractures that were treated at the Seoul National University Boramae Hospital in order to analyze the characteristics of mandibular fractures and the relationship between the causes and injury patterns. A total of 141 patients with mandibular fractures who were treated between 1996 and 2004 were analyzed retrospectively. The male to female ratio in the patient group was 5.13:1, and the mean age was 33.7 years. The most common etiologic factor was assaults (45.4%), and which was followed by activities associated with daily-life (40.4%) includeding falls, stumbling, collisions, and traffic accidents (11.3%). Single fracture sites were present in 75 patients (53.2%), two or more fracture sites were observed in other patients, and a total of 211 fracture sites were observed. The mandibular angle fractures (46.7%) was the most common in case of single fractures, and symphysis and angle fractures (45.4%) was most common in multiple fractures. Through out overall fracture sites, the most common fracture site was the symphysis (41.2%), followed by the angle (32.2%) and condyle (18.5%). Among assault and falls-related injuries, the common involving sites were the symphysis, and followed by the body and condyle. In case of traffic accidents, the symphysis fracture was the most common, and which was followed by the condyle and angle fractures. This study documented the characteristics of the mandibular fractures. The results demonstrate that preventive measures according to these characteristics will need to be implemented in order to minimize the risk of maxillofacial injuries. 저자 등은 1996년 1월부터 2004년 12월까지 서울대학교 보라매병원 구강악안면외과에서 치료받은 141명의 하악골 골절 환자의 임상적 연구를 통하여 다음을 알 수 있었다. 1. 전체 환자에서 남,녀 성별 발생빈도는 5.13대 1로 남자에서 호발 하였으며, 연령대별로는 20대에서 가장 빈발하였고 (30.5%), 그 다음 30대, 40대 (22.7%) 순이었다. 2. 하악골 골절의 원인으로 폭행 (45.4%), 낙상, 추락 및 충돌 (40.4%), 교통사고 (11.3%) 순이었다. 3. 골절부의 위치는 하악 정중부 (41.2%), 우각부(32.2%), 과두부 골절(18.5%)의 순으로 나타났으며, 단일 골절의 경우 하악 우각부 골절이 (46.7%)로 가장 많았고, 두 군데 이상의 골절의 하악 정중부 및 우각부 동시 골절이 가장 많았다 (45.5%). 4. 교통사고로 인한 하악 골절은 정중부, 과두부, 우각부 골절의 순으로 발생 빈도를 보였고, 폭력과 낙상, 추락 및 충돌 등으로 인한 골절의 경우 정중부, 우각부, 과두부 골절 순으로 발생빈도를 보였다.

치아 기관배양시 골형성단백의 역할에 관한 연구

정일혁,정종훈,정필훈,Chung, Il-Hyuk,Chung, Jong-Hoon,Choung, Pill-Hoon 대한구강악안면외과학회 2004 대한구강악안면외과학회지 Vol.30 No.5

Objectives : The proper development of the facial structures relies upon a sequence of tightly regulated signaling interactions between the ectoderm and mesoderm involving the participation of several families of signaling molecules. Among these, bone morphogenetic proteins (BMPs) have been suggested to be a key signal that regulates the development of the mandible and the initiation and morphogenesis of the teeth. The aim of this study was to examine the artificial development of the mandibular structures and to examine the role of BMPs on tooth morphogenesis and differentiation using an organ culture system. Materials and Methods : The tooth germs from Ed 11.5, 13.5 mice were dissected, and transplanted into the diastema of the mandible primordia. The mandibles containing the transplanted tooth germs were cultured in vitro. During this period, beads soaked with BMP4 were implanted around the transplanted tooth germs. In addition, a diastema block containing the transplanted tooth germ was dissected, then transferred to an adult mouse kidney. After the organ culture, the developing mandibular explant was removed from the kidney and prepared for the tissue specimens. Odontogeneis of the transplanted tooth germs was examined after Hematoxylin-eosin, Masson-trichrome staining. Results : Proliferation and differentiation of the tooth germs cultured in the diastema was observed. In the BMP4-treated tooth germs, the formation of the first and second molars was noted. The crown of the developing tooth showed the formation of a mature cusp with the deposition of enamel and dentin matrix. In conclusion, it was confirmed that BMP4 is involved in the formation of a dental crown and the differentiation of ameloblasts and odontoblasts of the molar tooth during the development of the transplanted tooth germs.

생체공학적 방법을 이용한 치아 및 하악골의 배양

정일혁 ( Il Hyuk Chung ),정필훈 ( Pill Hoon Choung ),조유영 ( You Young Jo ) 한국조직공학과 재생의학회 2005 조직공학과 재생의학 Vol.2 No.2

거대설 치료를 위한 혀 중앙부 절제술 :

정일혁(Il-Hyuk Chung),송승일(Seung-Il Song),김은석(Eun-Seok Kim) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.3

Macroglossia can cause dentomusculoskeletal deformities, instability of orthodontic and orthognathic surgical treatment, and create masticatory, speech and airway management problems. To determine whether a reduction glossectomy is necessary, it will important to identify the signs and symptoms of macroglossia. Development of dentoskeletal changes directly related with tongue size, such as an anterior open bite or a Angle Class III malocclusion tendency, would indicate that reduction glossectomy may be beneficial. For reduction glossectomy, several techniques have been reported. However, in most techniques the tip of tongue is removed. So its excision causes the loss of most mobile and sensitive portion of the tongue, and creates ankylosed, globular tongue. To avoid such problems, central tongue reduction technique have been proposed. This article will introduce central tongue reduction for anterior openbite case associated with macroglossia.

컴퓨터 단층촬영을 이용한 중안모 계측과 상악골 절단술에의 응용

정필훈,유충규,이은경,서제덕,정일혁,Choung, Pill-Hoon,Yoo, Chung-Kyu,Lee, Eun-Kyung,Suh, Je-Duck,Chung, Il-Hyuk 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.3

Various methods have been used in the past to indirectly analyze the craniofacial region. Among these, the lateral and posterior-anterior cephalometircs are used for the evaluation of the dentofacial deformities. However, cephalometircs create inaccuracies because of the inherent enlargement and distortion of the image. The interpretation of cephalometric films is also problematic: the number of anatomic landmarks that can be identified accurately is limited, and the overlap of structures on a radiograph making locating these landmarks difficult. To overcome these problems, computed tomography(CT) has been recommended as an useful modality in the diagnosis, surgical planning, and follow-up of craniofacial anomalies. There is no significant enlargement or distortion of the image, overlap of structure, or tracing error. And the number of anatomic landmarks is vast. The purpose of this study was to examine the orbit and midfacial region using Occlusal Maxillary CT, consisted of slices parallel to the occlusal plane. Based on these CT scan, we provide the data that could be applied to monitor an individual patient's skeletal pattern and the guide to the maxillary osteotomy.

상악결절과 다공성 골 미네랄의 복합이식을 통한 상악동 골이식술

한기덕(Ki-Deok Han),정일혁(Il-Hyuk Chung),이은경(Eun-Kyung Lee),서제덕(Je-Duck Suh),송승일(Seung-Il Song) 대한구강악안면외과학회 2007 대한구강악안면외과학회지 Vol.33 No.4

The aim of this study was to evaluate implant stability placed in the maxillary sinus which was augmented with bovine bone mineral (Bio-Oss) mixed with autogenous bone from the maxillary tuberosity. Maxillary sinus floor augmentation with the mixture of bovine bone mineral and autogenous maxillary tuberosity bone was performed in 30 maxillary sinuses, and 68 implants were placed at the time of sinus graft. After 6 months of implant placement abutments were connected and implant stability quotient (ISQ) was measured by radio frequency analysis (RFA). In addition, bone level changes was evaluated by taking periapical radiograph. During surgical procedures, no complication was observed, and all patients healed uneventfully. At 6 months the implant showed stable ISQ values. The marginal bone level changes around the fixtures was stably maintained through out the follow up period. This study confirmed that maxillary sinus floor augmentation with mixture of bovine bone mineral and maxillary tuberosity bone could be reliable for bone regeneration in subantral space.

치조정 골 소실이 심한 경우와 치간 사이 공간이 부족한 경우에서의 미니 임프란트 식립

서미현,유충규,이은경,정다운,서제덕,정일혁,Seo, Mi-Hyun,Yoo, Chung-Kyu,Lee, Eun-Kyung,Jung, Da-Unn,Suh, Je-Duck,Chung, Il-Hyuk 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.1

Purpose: This study presents the use of mini implants for fixed restoration and implant supported overdenture to enable the practitioner to overcome the anatomic obstacles of ridge width and narrow interdental space. Patients and methods: This study consisted of 9 patients who required single implants for one or two teeth replacement and 1 patient who required implant supported overdenture after mandiblectomy, iliac bone graft due to ghost cell tumor. The ages ranged from 29 to 70 years (mean 51). All patients were in good health. Clinical and radiographs were taken pretreatment, postoperatively, during rehabilitation, and at follow ups. Results: Total implant survival rate was 94.7%. One implant was removed due to its mobility as a result of bad bone quality (Type IV) and patient's carelessness (Heavy smoker). All patients except one reported complete satisfaction regarding to function, aesthetics, and phonetics. Radiographic follow up every 3months postoperatively showed success in achieving function and maintaining marginal bone level. Conclusion: Clinician can overcome both severe ridge deficiency and small interdental space with mini implant.

가토 두개골 결손부에 이식된 β-TCP의 골치유과정에서 맥동전자기장의 영향에 관한 연구

김상우(Sang-Woo Kim),황경균(Kyung-Gyun Hwang),임병섭(Byung-Sup Lim),박창주(Chang-Joo Park),정일혁(Il-Hyuk Chung),백승삼(Seung-Sam Paik),심광섭(Kwang-Sup Shim) 대한구강악안면외과학회 2006 대한구강악안면외과학회지 Vol.32 No.4

The purpose of this research was to investigate whether pulsed electromagnetic field (PEMF) stimulation applied to the rabbit cranial defects grafted with β-tricalcium phosphate (β-TCP) could affect the new bone formation. With 16 New Zealand white rabbits under the same condition, bilateral calvarial bone defects were formed around the sagittal suture line. The defect on the left side was grafted with β-TCP, while on the right side was grafted by harvested autogenous bone. PEMF was applied to 8 rabbits for 8 hours per day. The bony specimen were divided into 3 groups, the group 1 was autogenous bone grafted specimen, the group 2 was β-TCP grafted with PEMF, and the group 3 was β-TCP grafted without PEMF. We investigated the bone regeneration & growth factor expression at 2, 4, 6, and 8 weeks. As a result, BMP 2 was expressed in the group 1 from 2 weeks, the group 2 from 4 weeks, and the group 3 from 6 weeks. BMP 4 was expressed in the group 1 from 2 weeks, in the group 2 and the group 3 from 4 weeks. 4. There was no significant difference in expression pattern of BMP 7, PDGF, VEGF, and TGF-β1 during grafted bone regeneration in group 1, 2, and 3. According to our results, PEMF stimulation could be effective on the new bome formation in animal study, and have a feasibility of clinical use.