• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제31권6호
• /
• pp.499-504
• /
• 2009

We investigated 52 cases of 42 patients who were diagnosed as odontogenic keratocyst in the department of Oral and maxillofacial Surgery of Kyungpook National University from 2006 to 2008, and following results were obtained. 1. Among 52 cases of OKCs, all cases were parakeratinzied. 2. Among 52 cases of OKCs, 42 cases were type I, 9 cases were type II and 1 case was type V. 3. Among 52 cases of OKCs, there were bud-like proliferation of basal cell layer on connective tissue area on 10 cases, satellite cysts on overlying oral mucosa or connective tissue area on 6 cases and rests of epithelium on connective tissue area on 6 cases. 4. Among 52 cases of OKCs, there were focal inflammation on the epithelium of the OKCs on 6 cases and diffuse inflammation on 8 cases. 5. Among 52 cases of OKCs, cytokeratin-10 was expressioned on superficial and intermediate layer on all cases. Accordingly, the presence or absence of cytokeration-10 on the epithelium of the cyst will be good differential diagnosis of between OKC and dentigerous cyst.

• Imaging Science in Dentistry
• /
• 제49권2호
• /
• pp.79-86
• /
• 2019

Purpose: This study reviewed the common conditions associated with displacement of inferior alveolar nerve canal. Materials and Methods: General search engines and specialized databases including Google Scholar, Pub Med, Pub Med Central, Science Direct, and Scopus were used to find relevant studies by using keywords such as "mandibular canal", "alveolar canal", "inferior alveolar nerve canal", "inferior dental canal", "inferior mandibular canal" and "displacement". Results: About 120 articles were found, of which approximately 70 were broadly relevant to the topic. We ultimately included 37 articles that were closely related to the topic of interest. When the data were compiled, the following 8 lesions were found to have a relationship with displacement of mandibular canal: radicular/residual cysts, dentigerous cyst, odontogenic keratocyst, aneurysmal bone cyst, ameloblastoma, central giant cell granuloma, fibrous dysplasis, and cementossifying fibroma. Conclusion: When clinicians encounter a lesion associated with displaced mandibular canal, they should first consider these entities in the differential diagnosis. This review would help dentists make more accurate diagnoses and develop better treatment plans according to patients' radiographs.

• 치과방사선
• /
• 제25권2호
• /
• pp.399-408
• /
• 1995

악골의 매복치아와 관련된 단방성의 치관부 방사선투과상을 나타내는 병소들 중에서 임상적, 방사선학적, 조직병리학적 검사를 통해 함치성 낭으로 진단된 233증례들의 임상, 방사선학적소견을 분석하여 다음과 같은 결론을 얻었다. 1. 함치성 낭은 10대(38.2％)에서 가장 호발되었으며, 남성(67.4％)에서 더 많았다. 2. 주소는 무통성의 종창(33.9％)이 가장 많았고, 대부분 외과적으로 치료되었으며 적출술(76.6％) 또는 조대술(23.4％)이 사용되었다. 3. 병소는 중심형(72.5％)이 대부분이었으며, 병소의 크기는 2~2.9cm인 경우(33.0％)가 가장 많았다. 4. 병소는 상악에서는 전치부(32.6％), 하악에서는 구치부(22.7％)에서 호발되었으며, 원인치아는 상악 과잉치(34.3％)에서 가장 많았다. 5. 주변 정상 골조직과의 경계는 과골성의 분명한 골경화로 나타난 경우(49.8％)가 가장 많았으며, 병소의 변연형태가 평활한 경우(73.4％)와 병소 내부의 방사선투과상이 균일한 경우(79.4％)가 대부분이었다. 6. 병소와 관련된 피질골의 비박과 팽융이 대부분의 경우(82.0％)에서 나타났으며, 그 방향은 협측인 경우(64.0％)가 가장 많았다. 7. 병소가 발생된 치아의 전위(41.2％)와 치관발육의 지연(19.3％)이 나타났으며, 원인치아의 백악ㆍ법랑 경계부와 치아부착부 사이의 거리는 2mm미만인 경우(79.6％)가 가장 많았다. 8. 병소와 관련된 치아의 치조백선 소실(66.8％), 치근 흡수(33.9％), 치아 전위(31.5％)가 관찰되었으며, 하악관의 전위(46.5％)와 상악동 또는 비강의 전위(72.2％)가 관찰되었다.

• Imaging Science in Dentistry
• /
• 제33권4호
• /
• pp.211-215
• /
• 2003

Purpose: To assess the radiographic findings of odontogenic cysts showing displacement of the mandibular canal using computed tomographic (CT) and panoramic images. Materials and Methods : CT and panoramic images of 63 odontogenic cysts (27 dentigerous, 16 odontogenic keratocysts, and 20 radicular cysts) were analyzed to evaluate the following parameters: the dimension and shape of the cysts, and the effect of the cysts on the mandibular canal and cortical plates. Results: Of the 63 cysts examined in the study, 35 (55.6%) showed inferior displacement of the mandibular canal and 46 (73.0%) showed perforation of the canal. There were statistically significant differences between CT and panoramic images in depicting displacement and perforation of the mandibular canal. Cortical expansion was seen in 46 cases (73.0%) and cortical perforation in 23 cases (36.5%). The radicular cysts showed cortical expansion and perforation less frequently than the other cyst groups. Conclusion: Large cysts of mandible should be evaluated by multiplanar CT images inorder to detect the mandibular canal and cortical bone involvement.

• 치과방사선
• /
• 제3권1호
• /
• pp.43-46
• /
• 1973

Authors have observed a rare case of adenoameloblastoma in panagram and topographic occlusal film of the maxillary anterior region of 15 years old female, and obtained the following conclusions: 1. Adenoameloblastoma commonly occured in 1st and 2nd decade of life. 2. The incidence of the lesion is higher in the female than in the male. 3. The incidence of the lesion is higher in the maxillae especially canine region) than in the mandible. 4. The tumor is often related to an unerupted tooth. 5. The tumor resembled a dentigerous cyst but calcified bodies and clusters appeared in the cystic cavity 1 that shows radiopaque in the roentgenograms.

• 대한치과의사협회지
• /
• 제16권1호통권104호
• /
• pp.37-42
• /
• 1978

A study on the impacted teeth of the anterior segment was carried out. The data for this study were compiled form 1739 outpatients of the Department of Orthodontics, College of Dentistry, Seoul National University. The following conclusions were obtained; 1. The frequency of the impacted teeth of the anterior segment was 2.8% and the frequency of male was 4.0%, that of female was 2.1%., respectively. 2. The order of occurrence of the impacted teeth in the anterior segment was maxillary canine mesiodens, maxillary central incisor, maxillary lateral incisor, mandibular canine. 3. The etiologic factors of the impaction were the space deficiency for eruption, cleft palate, the prolonged retention of deciduous teeth, dentigerous cyst. 4. The favorable results of treatment and prognosis were obtained from the impacted teeth of the normal shape after surgical exposure and adhered the plastic attachment and inducted them into the dental arch.

• Imaging Science in Dentistry
• /
• 제44권2호
• /
• pp.171-175
• /
• 2014

One of the most common oral surgical procedures is the extraction of the lower third molar (LTM). Postoperative complications such as paresthesia due to inferior alveolar nerve (IAN) injury are commonly observed in cases of horizontal and vertical impaction. The present report discusses a case of a vertically impacted LTM associated with a dentigerous cyst. An intimate contact between the LTM roots and the mandibular canal was observed on a panoramic radiograph and confirmed with cone-beam computed tomographic (CBCT) cross-sectional cuts. An orthodontic miniscrew was then used to extrude the LTM prior to its surgical removal in order to avoid the risk of inferior alveolar nerve injury. CBCT imaging follow-up confirmed the success of the LTM orthodontic extrusion.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제27권2호
• /
• pp.167-173
• /
• 2001

Cystic lesion of the jaw are frequently encountered clinically. Although they rarely lead to development of tumors, they can result in resorption of the jaw bone or asymmetry of the face may occur. The purpose of this study is to find the clinical and histopathological pattern of cysts and to help better understanding for the diagnosis and treatment of jaw cysts. The hospital chart, out-patient chart, panorama X-ray, histopathological report and operation report of 246 patients were reviewed who had been diagnosed as cyst. Sex distribution, age distribution, classification, anatomic distribution, clinical sign & symptoms, treatment, post-operation complications, recurrence rate were studied. Then significant difference between the diameter of cyst with bone graft and none-bone graft was calculated with SAS program. The results were as follows. 1. Among the total patient of 246 cases, male were 163 case(67.0%), and female were 83 case(37.0%), male predominated by the ratio of 1.98. 2. By age group, the 20's accounted for the largest proportion of the cases(27.2%) and the 30' accounted for the 2nd largest proportion of the case(19.5%). 3. Radicular cyst and dentigerous cyst were most common cysts, irrespective of 166 case(67.5%) and 62 case(25.2%). 4. Clinical sign & symptoms were swelling(167case), pain(85case), pus discharge(53case), teeth discoloration(28case), indicating that most complaints were related to inflammation and facial asymmetry. 4.9% of the total cases were discovered accidentally. 5. The primary site of cysts were maxillary anterior area(43.9%), the others were, in descending order, mandibular posterior area(25.6%), maxillary posterior area(14.6%). 6. Enucleation with endodontic treatment was a main treatment method(133 case, 54.1%) and 38 cases(15.4%) were enucleation with extraction, and 37 cases(15.0%) were only enucleation, and 21 cases(8.5%) were enucleation with bone graft. 7. The average diameter of cysts with bone graft was significally greater than with non-bone graft(p<0.05). 8. Post-operation complications occurred in 10 case(4.1%), all of this were due to secondary infection.

• 대한소아치과학회지
• /
• 제43권3호
• /
• pp.237-245
• /
• 2016

낭은 액체 또는 반유동성 액체를 함유하는 상피세포층으로 둘러싸인 공동이다. 낭은 모든 연령대에서 진단될 수 있으나, 소아 청소년 환자는 성인들과 다른 병소의 종류와 양상을 보일 수 있으며, 후속 영구치가 발육 중이므로 치료법도 다를 수 있다. 본 연구는 2005년 1월부터 2015년 3월까지 최근 10년간 경희대학교 치과병원을 내원한 19세까지의 소아 청소년환자 중임상적, 방사선학적 및 조직학적으로 낭으로 확진된 253명의 환자들을 분석하였다. 그 결과 낭은 남아 142명(56.1%)에서 다소 많았으며, 치성낭이 209개(82.6%)로 대다수를 차지하였고, 전체적으로 발육성 낭이 염증성 낭보다 많았다. 발육성 낭에서는 함치성낭, 염증성 낭은 치근낭이 많았다. 한편 하악 구치부에서 발생 비율이 높았다. 환자들 중 많은 경우 임상 증상이 없었으며, 낭의 치료 방법으로는 적출술만을 시행하고 원인치 발거를 동시에 진행한 경우가 많았다.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제36권1호
• /
• pp.1-6
• /
• 2014

Purpose: This study was designed for identification of the main clinicopathological features of cysts in the oral and maxillofacial regions. Methods: A retrospective observational study was conducted on 164 patients who had been diagnosed with cyst of the jaw, from the database of 168 histopathological diagnoses at the Department of Oral and Maxillofacial Surgery of Busan Paik Hospital at Inje University, from January 2009 to December 2011. The subjects were treated and the following variables were recorded: gender, age, clinical signs and symptoms, histopathological distribution, treatment methods, and complications. A descriptive analysis of the study variables was performed using a chi-square test. Results: Among the 164 patients, there were more male than female patients (male-female ratio: 1.7:1). The most predominant ages were the 20s and 40s. Among the classes of pathological cysts, radicular cysts and dentigerous cysts were the most common, with incidences of 56.0% and 35.1%. Thirty-six percent of the patients had no symptoms; and of those who had symptoms, the main signs and symptoms were swelling (24.4%) and pain (17.1%). The most frequent management method was the combination operation, such as enucleation with or without extraction and apicoectomy of the causative teeth. Of the 164 patients, 13 had complications; and one patient who had been treated with enucleation with apicoectomy had a recurrent cyst. Conclusion: Using a chi-square test, no significant differences in prevalence were observed in relation to gender according to age. Comparative analysis of radicular and dentigerous cysts showed a significant difference in their prevalence according to their anatomical location, however, no significant differences in were observed in their incidence rates according to age.