• Journal of Korean Dental Science
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• 제2권1호
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• pp.31-38
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• 2009

With today's social and cultural personal interactions, greater leisure time and participation in sports activities, and growing traffic volume, the risk of physical trauma has increased markedly. This is a clinical and retrospective study of patients exposed to oral and maxillofacial trauma. We clinically observed 72 patients with trauma in the Department of Oral and Maxillofacial Surgery, Kyunghee University Dental Hospital, from June 2006 through November 2007. The following data was obtained: 1. The male:female ratio of patients having experienced physical trauma was 6.2:1, with most patients in their twenties. 2. Traffic accident (37.5%) was the most common cause of trauma. 3. The highest incidence of fracture occurred to the zygomatic arch(22.1%) among mid-facial fractures and angle(37.5%), symphysis(35.4%) in mandible fractures. 4. Open reduction (88.9%) was the most frequently used form of treatment. Closed reduction was performed on the remaining 11.1% of cases. 5. Teeth and alveolar bone damage occurred in 23.6% of all cases. 6. Other injuries that were related to mid-face fracture occurred in 27.8% of all cases. 7. Post-operative complications occurred in 31.9% of cases, and the highest complication was the nerve injury.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제32권1호
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• pp.37-42
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• 2010

Purpose: The mental foramen (MF) is an important anatomical structure during local anesthesia and surgical procedures in terms of achieving effective mental nerve blocks and avoiding injuries to the neurovascular bundles. Thus, understanding the anatomic features of the mandibular canal and accessory mental foramen in Korean could contribute to the surgical anatomic assessment. This study was to elucidate frequency, position and course of AMF (accessory mental foramen) in Korean using 3D cone beam computed tomography. Materials and Methods: The CBCT (Conbeam computed tomography) DICOM data (Alphard, Asahi, Japan) from 540 patients in korean were analyzed. We investigated images of 3D CBCT using Ondemand (CyberMed, Korea) software program on the incidence and anatomical characteristics of accessory foramen. Results: The accessory mental foramina were found in 17 patients. Accessory mental foramina exist predominantly in the apical area of the second premolar and posteroinferior area of the mental foramen. The accessory branches of the mandibular canal showed common characteristics in the course of gently sloping posterosuperior direction in the buccal surface area. The size of most AMF was obviously smaller than that of MF. Conclusion: We could identify frequency, position and course of AMF (accessory mental foramen) by the anatomical study of the accessory mental foramen using 3D cone beam CT in Korean.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권6호
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• pp.403-408
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• 2020

Objectives: Appropriate and accurate local anesthetic (LA) techniques are indispensable in the field of oral and maxillofacial surgery to obtain a satisfactory outcome for both the operating surgeon and the patient. When used alone, the inferior alveolar nerve block (IANB) technique requires supplemental injections like long buccal nerve block for extraction of mandibular molars leading to multiple traumatic experiences for the patient. The aim of this study was to anesthetize the inferior alveolar, lingual, and long buccal nerves with single-needle penetration requiring a minimal skillset such as administering a conventional IANB through introduction of the Benny Joseph technique for extraction of mandibular molars. Materials and Methods: This was a prospective study conducted in the Department of Oral and Maxillofacial Surgery, Kunhitharuvai Memorial Charitable Trust (KMCT) Dental College, Calicut, India. The duration of the study was 6 months, from June to November 2017, with a maximum sample size of 616 cases. The LA solution was 2% lignocaine with 1:100,000 adrenaline. The patients were selected from a population in the range of 20 to 40 years of age who reported to the outpatient department for routine dental extraction of normally positioned mandibular right or left first or second molars. Results: Of the 616 patients, 42 patients (6.8%) required re-anesthetization, a success rate of 93.2%. There were no complications such as hematoma formation, trismus, positive aspiration, and nerve injuries. None of the cases required re-anesthetization in the perioperative period. Conclusion: The Benny Joseph technique can be employed and is effective compared with conventional IANB techniques by reducing trauma to the patient and also requires less technique sensitivity.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제13권3호
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• pp.291-299
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• 1991

We retrospectively reviewed 334 inpatients who sustained a total of 518 mandibular fractures and who ewer treated in our department between l980-1990. This results were obtained as follows : 1. In respect of incidence, there were the highest frequency in July, and the lowest frequency in May. The number of patients has not been increased year after year due to competition with other department in our hospital. 2. The age frequency was the highest in the 2nd decade(38.9%) and the ratio of man to women was 4.9 : 1. 3. The most frequent cause of mandibular fracture was traffic accident(43.4%), and the next was fall down(24.3%), fist blow(71%), industrial accident(21%) and others in order. In the traffic accident, autobicycle accident was 14.1%. 4. The most common location of mandibular fracture was symphysis(38.8%), condyle(20.7% ), angle(19.9%) and body(15.1%) were next in order of frequency. The classification by location of fracture, the frequency of single fracture was 54.8%. 5. In 334 patients of mandibular fracture, the frequency of associated injuries was facial laceration(58.4%), teeth injuries(37.7%), extremity injuries(13.2%) were next in order of frequency. 6. The patients arrived in hospital immediately within 24 hours after accident wee 61.4% of all. In respect of treatment, open reduction was 68.7% of all. 7. Complications including infection were present 11.1% of patient. Other complications inclued delayed healing malocclusion, malocclusion and neurologic problem.

• 치위생과학회지
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• 제12권4호
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• pp.310-319
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• 2012

본 연구는 서울에 위치한 야간 응급실이 있는 S 대학병원의 2009년 1월 1일부터 2009년 12월 31까지 내원한 환자 중 구강악안면부 외상 상병명(한국질병 분류기호: S01.5, S02.40, S02.41, S02.50, S02.51, S02.60, S02.61, S03.2)으로 집계된 1,696건의 자료 중 1,495건의 전산 통계자료를 이용하여, 구강악안면 외상발생 요인에 대한 자료를 분석하고 평가하였으며 다음과 같은 결과를 얻었다. 1. 성별 외상발생 남녀비는 1.49:1로 남자에서 더 많았고 남자가 894명(59.8%), 여자가 601명(40.2%)으로 나타났다. 2. 연령별로 외상발생은 7~14세(19.6%)에서 가장 높게 나타났고, 50~59세(13.7%), 60~69세(12.6%), 20~29세(11.8%), 30~39세(10.8%), 40~49세(9.6%), 6세 이하(9.4%), 70세 이상(605%), 15~19세(6.0%) 순으로 나타났다. 3. 원인별로는 넘어짐(25.9%)이 가장 많았고, 부딪힘(11.8%), 저작(11.6%), 교통사고((6.0%), 폭력(5.3%), 스포츠(2.4%), 추락(0.7%)의 순으로 나타났다. 4. 장소에 대한 분포는 등산, 해변, 야외 등 기타 장소가(24.7%) 가장 많았고, 공공장소 및 사무실(19.6%), 집(19.4%), 도로 길(13.8%), 학교 유치원 어린이 집(7.9%), 운동장(5.2%), 놀이터(3.6%)와 공원(3.6%), 그리고 계단(2.0%) 순으로 나타났다. 5. 외상발생 부위는 전치부(43.2%)와 구치부(43.1%)가 많았고, 이어 악골(9.2%), 혀, 입술 및 주위조직(2.6%), 악관절(1.9%) 순이었다. 6. 외상발생 시간은 15~19시(10.4%)와 19~23시 (7.1%)가 높게 나타났다. 발생 원인별 시간은 넘어짐의 경우 15~19시(14.7%), 추락의 경우 7~11시(27.3%), 부딪힘의 경우 15~19시(22.1%), 폭력에 의한 경우 19~23시와 23~3시(26.6%)에 각각 동일하게 높게 나타났고, 교통사고의 경우 15~19시(28.9%), 스포츠 활동의 경우 15~19시(48.6%), 저작 등에서는 19~23시(3.4%)에 높게 나타났다, 7. 외상 원인별 상병명은 넘어짐의 경우 S01.5 (입술 및 구강의 열린 상처), 추락의 경우 S02.51 (개방성 치아의 파절), 부딪힘의 경우 S02.50 (폐쇄성 치아의 파절), 폭력의 경우 S02.60 (폐쇄성 아래턱뼈의 골절), 교통사고와 스포츠, 저작 등의 경우 각각 S02.50 (폐쇄성 치아의 파절)이 높게 나타났다. 이상의 결과를 바탕으로 구강악안면부 외상사고에 대한 역학적 특성을 이해하고 경향을 고려하여 체계적인 구강악안면부 외상사고 예방대책 및 보완정책 수립과 적극적인 안전교육 및 홍보 활동이 필요할 것으로 생각된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제32권1호
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• pp.62-67
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• 2010

The spreading pathways which is the cause of infection on head and neck area are submandibular space, masticatory space, parapharyngeal space, retropharyngeal space, carotid sheath and mediastinum, etc. If spread to parapharyngeal area involving airway, such infection can be life-threatening by airway obstruction, or can cause vascular injury followed by hemorrhage, nerve injuries. Also, if spread to superficially, necrotizing fasciitis and many complications may occur including gangrene of skin. The key to successful treatment of infection on head and neck area is recognition of spreading pathways, early diagnosis and following therapeutic management. Our department present two cases, one is infection progressed superficially to suprasternal space, another is spreading deep according to parapharyngeal space, subclavian space and carotid sheath followed by airway obstruction, and obtained significant results with surgical incision and drainage, administration of selected antibiotics, continuous post-operative treatment. We report these 2 cases with literatures review.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권4호
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• pp.399-406
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• 2000

With the increase of industrialization, leisures, sports activities and traffic, the risk of trauma has increased markedly. Midfacial bones are relatively common sites of trauma, and are difficult sites of correct reduction and reconstruction, because midface is composed of mostly thin cortical bone surrounding cavities filled with either air or fat with discrete areas of bony condensation. A clinical study on 208 patients with midfacial bone fracture who visited Sanggye Paik Hospital during 5 years($1990{\sim}1995$) was done by analyzing sex, age, cause, fracture site, treatment method, complication and involvement of other body part, etc. The results obtained were as follows : 1. The occurrence was more frequent in male than in female with ratio of 2.7 : 1 and most frequently in twenties. 2. Traffic accident was the most common cause of midface fractures. 3. Zygoma was the most frequently occurred site(50%) of midface fractures. 4. Simple fracture(75%) was more frequently occurred than compound fracture(25%). 5. As treatment method, open reduction(76.4%) was used more frequently than closed reduction(23.6%) 6. Generally, operations are done in 5 days after admission(59.1%), and intermaxillary fixation was done in 78.4% of cases. 7. Teeth and alveolar bone damages were occurred in 32.2% of cases. 8. Other injuries that were related to midface fracture occurred in 63.3% of cases. 9. Post-operative complications occurred in 9% of cases.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제13권3호
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• pp.300-304
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• 1991

This is case report of open reduction of condylar fractures with or without discal injury. Many articles described open reduction and internal fixation of condylar fractures emphasize the method of bony reduction and fixation without mention of the position of the disc. So we like to present our cases of open reduction of condylar fractures in conjunction with reconstruction of the disc and associated structures. The pupose of this presentation is to emphasize several well - established principles of trauma management and management of temporomandibular joint injuries, such as 1) in situations of traumatic injury, anatomic restoration is the goal of treatment and, 2) anatomic alignment of the TMJ disc over the condyle is preferable to disc subluxation because the latter may lead to chronic pain, limitation of opening and degenerative arthritis. Although our case is small with short term follow up, we believe that open reduction and internal fixation of condylar fractures in conjunction with disc repair is a biologically sound approach to those fractures indicated for open surgery. Long term follow up will allow better judge the validity of this treatment approach to us.

• Imaging Science in Dentistry
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• 제37권4호
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• pp.217-220
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• 2007

Purpose: The purpose of this study was to compare the location of the mandibular canal in Class III malocclusion to its location in normal occlusion for adults. Materials and Methods: For this study 32 skeletal Class III patients and 26 normal patients were observed. Four measurements were taken on cross sectional tomography between the first and second molars: the distance from the mandibular canal to the inner surface of both the buccal and lingual cortices, the distance from the mandibular canal to the inferior border of the mandible, and the buccolingual width of the mandible. The buccolingual location of the canals was classified as lingual, central, or buccal. Each measurement was analyzed with an independent t test to compare Class III malocclusion to normal occlusion. Results: Compared to the control group, the prognathic group had a shorter distance from the canal to the inner surface of the lingual cortex and to the base of the mandible. A higher percentage of the canals were located lingually in the prognathic group. Conclusion: This study showed that the mandibular canal was located more lingually and inferiorly in prognathic patients than in patients with normal occlusion. These results could help surgeons to reduce injuries to the inferior alveolar nerve.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제28권6호
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• pp.565-569
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• 2006

The purpose of this study was to assess the influence of the presence and impacted state of the mandibular third molars on the incidence of mandibular condyle fracture. A retrospective study was designed for patients presenting to the Department of Oral and Maxillofacial Surgery, Kyungpook National University Hospital and Tae-gu Fatima Hospital for treatment of mandibular fractures from January 2003 to January 2006. The independent variables in this study were the presence, degree of impaction of third molars, and the outcome variables were the incidence of mandibular condyle fractures. Hospital charts and panoramic radiographs were used to determine and classify these variables. The demographic data included age, sex, mechanisms of injuries and number of mandibular condyle fractures. The study sample comprised 136 mandibular condyle fractures in 105 patients. Result of this study demonstrated a statistically significant difference in ipsilateral condyle fractures and mandibular third molar absence(P=0.032) and bilateral condyle fractures without another fracture and mandibular third molar absence(P=0.028).