• 대한기관식도과학회:학술대회논문집
• /
• 대한기관식도과학회 1993년도 제27차 학술대회 초록집
• /
• pp.95-95
• /
• 1993

상악암은 비교적 진행되어서야 발견되는 수가 많지만 경부 임파절 전이나 원격 전이는 다른 두경부 암에 비해 흔하지 않기 때문에 종양의 국소 억제가 치료의 성패를 좌우하게 된다. 그러나, 상악동은 안와나 두개저에 접하고 있어서 다른 악성 종양처럼 충분하게 안전한 절제연을 두고 제거하는 것이 불가능한 수가 많다. 한편 대부분의 시설에서 수술과 방사선요법을 단독 또는 병행요법으로 시행하고 있는데 그 치료성적이 보고자에 따라 다양하며 비교적 좋지 못한 형편이다. 저자들은 88년 t월부터 91년 12월까지 상악암으로 진단받고 동맥내 항암제 주입요법, 방사선 치료및 수술을 포함한 집합적 치료를 시행하였던 16례(전례 편평상피암, T2 1례, T3 6례, T4 9례, 평균 연령 57.2세)에 대하여 그 결과를 후향적으로 검토하였다. Kaplan-Meier법에 의한 5년 생존률은 51.95%였으며 안구나 구개, 안면 피부등을 일부 보존할 수 있었고 기능적으로도 만족할 만하였다.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제13권1호
• /
• pp.9-15
• /
• 1991

치조골 파열은 전체 구개파열 환자의 약 75% 정도 발생하며 발생원인은 유전적 요인이 강하며 환경적 요인으로 모체의 영양장애, 방사선조사, 스테로이드투여, 저산소증, 양수변화 바이러스에 의한 질환등을 들 수 있다. 치조골 파열시 상악골의 전후방관계의 전방골결손 및 수평관계의 후방골결손, 인접치아에 대한 골지지력 결여, 측절치의 조기결손, 그리고 안모의 외형에도 많은 변화를 줄 수 있다. 치조골 파열에 대한 골이식은 치조골을 안정시키고, 치조골의 연속성 도모 및 인접치아에 대한 골지지와 치아상실 예방 및 비익저부를 제공하는데 그 목적이 있다. 골이식은 시기에 따라 2세미만에 실시하는 일차 골이식술, 2세에서 5세사이에 시술하는 조기 이차 골 이식술, 5세에서 16세 사이에 실시하는 이차 골 이식술, 그리고 16세 이후에 실시하는 말기 이차골 이식술 등이 있으며 이중 혼합치열기인 5세에서 16세 사이에 실시하는 이차골 이식술이 가장 성공률이 높은 것으로 알려져 있다. 본 교실에서는 치조골 파열환자에 자가망상골을 이용한 골이식술을 시행하여 비교적 양호한 결과를 얻었기에 이에 보고하는 바이다.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제39권
• /
• pp.22.1-22.9
• /
• 2017

Background: Two-jaw surgery including mandibular and maxillary backward movement procedures are commonly performed to correct class III malocclusion. Bimaxillary surgery can reposition the maxillofacial bone together with soft tissue, such as the soft palate and the tongue base. We analyzed changes of pharyngeal airway narrowing to ascertain clinical correlations with the prevalence of snoring after two-jaw surgery. Methods: A prospective clinical study was designed including a survey on snoring and three-dimensional (3D) computed tomography (CT) in class III malocclusion subjects before and after bimaxillary surgery. We conducted an analysis on changes of the posterior pharyngeal space find out clinical correlations with the prevalence of snoring. Results: Among 67 subjects, 12 subjects complained about snoring 5 weeks after the surgical correction, and examining the 12 subjects after 6 months, 6 patients complained about the snoring. The current findings demonstrated the attenuation of the largest transverse width (LTW), anteroposterior length (APL), and cross-sectional area (CSA) following bimaxillary surgery given to class III malocclusion patients, particularly at the retropalatal level. The average distance of maxillary posterior movements were measured to be relatively higher (horizontal distance 3.9 mm, vertical distance 2.6 mm) in case of new snorers. Conclusions: This study found that bimaxillary surgery could lead to the narrowing of upper airway at the retropalatal or retroglossal level as well as triggering snoring in subjects with class III malocclusion. Based on the current clinical findings, we also found that upper airway narrowing at retropalatal level may contribute to increasing the probability of snoring and that polysonography may need to be performed before orthognathic surgery in subjects with class III malocclusion.

• 대한치과교정학회지
• /
• 제34권5호
• /
• pp.458-464
• /
• 2004

교정치료에 있어서 고정원의 조절은 매우 중요한 요소이며, 상악에서 특히 그러하다. 이를 얻기 위해 많은 노력을 해 왔으나 대부분이 환자의 협조에 대한 의존이 필수적이었기 때문에 고정원 보강에 대하여 확신할 수 없었다. 하지만 최근 skeletal anchorage를 이용하여 환자의 협조를 최소화하면서도 보다 효과적으로 고정원 보강을 할 수 있는 방법이 시행되고 있다. 또한 과거의 골 융합성 임프란트와 달리 미니 스크류는 구강 내의 어느 부위에나 식립할 수 있을 정도로 식립 부위의 제한성이 적다는 장점이 있다. 저자는 titanium miniscrew를 구개 정중부의 약간 측방에 식립하고, indirect active P.S.A.(Palatal skeletal anchorage)를 이용하여 치료한 결과 상악 구치부에서의 고정원 보강을 얻을 수가 있었다. 이 치료 결과로 보아 PSA는 상악 구치부의 고정원 보강 역할을 할 수 있을 것으로 생각되며. 또한 transpalatal arch system의 다양한 design을 응용한다면 효율적인 치아 이동을 하는데 많은 도움이 될 것으로 생각된다.

• 치과방사선
• /
• 제26권2호
• /
• pp.165-174
• /
• 1996

The authors diagnosed a 33 years old female as benign lymphoepithelial lesion after undergoing clinical, radiological and histopathological examinations and the characteristics were as follows : 1. Clinically, the patient complained of painless bilateral swelling of the parotid glands and dryness of the palate. Rheumatoid factor was detected in her serum. 2. Sialograms showed punctate or globular collections of contrast media distributed evenly throughout the parotid glands in so-called 'cherry blossom' or 'leafless fruit-laden tree' appearance. 3. A salivary gland scan showed no uptake of radioisotopes by the parotid glands. 4. At Tl-weighted imaging of PNS MRI, the lesions had the same signal intensity as the rest of the gland. At TI-weighted imaging, the lesions could be seen as high signal intensity 1.3 cm and 2.1 cm in diameter in the left and the right parotid gland respectively. 5. Ultrasonogram showed sonolucent lesions 20×15mm and 17×14mm in size in the lower part of the left parotid gland and another 18×11mm in size in the lower part of the parotid gland as well as many other small sonolucent lesions. 6. Histopathologically, lymphocytic infiltration replacing the normal acini and lymphoid follicles containing germinal centers could be seen. Epimyoepithelial islands were scattered throughout the lesion and benign lymphoepithelial cysts were also observed.

• 치과방사선
• /
• 제15권1호
• /
• pp.75-83
• /
• 1985

Bitewing and periapical radiographic techniques are used in clinical and epidemiological studies to assess crestal alveolar bone levels. The purpose of the present study investigated relationships between these techniques by assessing alveolar crest location at the same site. Bitewing and periapical radiographs were available from posterior quadrants of 120 subjects. The distance from cemento-enamel junction to the alveolar crest (CEJ -CR) was measured for each proximal surface from the distal of the cuspid to the distal of the second molar. Data were arranged according to the proximal surface examined, and bitewing and periapical measurements were compared using paired tests. The obtained results were as follows; 1. In maxilla, a significant t ratio with a P value of 0.05 or less was reached for 78% and in mandible reached for 39%. 2. Pearson correlations were calculated 32 surfaces (89%) had values below 0.70 and so, data obtained by these techniques can not be used interchangeably on an individual or group basis. 3. In situations where the periapical measure was greater than the bitewing, it ranged up to 20.7% greater with a mean 9.8%. Where the bitewing was greater than periapical, it ranged up to 51. 9% greater, with a mean 18.2%. 4. The percentage difference was greater in maxillary posterior areas than in mandibular molar, premolar areas. A lower prevalence of significant differences was attributed to relatively more simple root and favorable radiographic conditions in mandibular molar and premolar areas. 5. The anatomical limitations imposed on periapical radiographic technique, most often result in somewhat foreshortened radiographic images. This situation would tend to be accentuated by the anatomical restrictions of the hard palate. 6. Consequently, since the significant differences frequently exist between measurements obtained from bitewing and periapical techniques, it is important to define which technique is used.

• Imaging Science in Dentistry
• /
• 제48권1호
• /
• pp.51-57
• /
• 2018

Purpose: To perform a comparative analysis of the palatal bone thickness in Thai patients exhibiting class I malocclusion according to whether they exhibited a normal or open vertical skeletal configuration using cone-beam computed tomography (CBCT). Materials and Methods: Thirty CBCT images of Thai orthodontic patients (15-30 years of age) exhibiting class I malocclusion with a normal or open vertical skeletal configuration were selected. Palatal bone thickness was measured in a 3.0-mm grid pattern on both the right and left sides. The palatal bone thickness of the normal-bite and open-bite groups was compared using the independent t-test. The level of significance was established at P<.05. Results: The palatal bone thickness in the normal-bite group ranged from $2.2{\pm}1.0mm$ to $12.6{\pm}4.1mm$. The palatal bone thickness in the open-bite group ranged from $1.9{\pm}1.1mm$ to $13.2{\pm}2.3mm$. The palatal bone thickness was lower at almost all sites in patients with open bite than in those with normal bite. Significant differences were found at almost all anteroposterior sites along the 3 most medial sections (3.0, 6.0, and 9.0 mm lateral to the midsagittal plane)(P<.05). Conclusion: Class I malocclusion with open vertical skeletal configuration may affect palatal bone thickness, so the placement of temporary anchorage devices or miniscrew implants in the palatal area in such patients should be performed with caution.

• 대한장애인치과학회지
• /
• 제12권2호
• /
• pp.92-95
• /
• 2016

Beckwith-Wiedemann syndrome은 다양한 임상적 특징을 보이는 질환이다. 거대설은 BWS 환아에서 가장 흔히 관찰되는 특징으로 그로 인한 섭식 문제와 호흡곤란이 야기될 수 있어 치과 치료 시, 주의를 요하게 된다. 또한 거대설로 야기될 수 있는 골격적인 문제에 대한 장기적인 평가가 필요하다.

• 대한구순구개열학회지
• /
• 제4권2호
• /
• pp.19-27
• /
• 2001

This study was performed to determine the prevalence of hypodontia and hyperdontia of permanent teeth among Korean schoolchildren, and to compare differences in the prevalence between Korea, other country, and other ethnic groups. The sample consisted of 346 girls aged 6.9～0.3 yr and 375 boys aged 6.8～0.4 yr on whom a panoramic radiograph was taken at Yeonchun-Gun community in Korea. The prevalence of congenitally missing teeth (third molars excluded) was 6.7% in boys and somewhat higher, 9.5% in girls, and 8.0% for both sexes combined. On the average, number of missing teeth per affected child was 1.9 teeth. The most commonly congenitally missing teeth were the mandibular second premolar (32.7%), followed by the mandibular incisor (28.7%), the maxillary second premolar (16.7%), and the maxillary lateral incisors (10.2%). The prevalence of supernumerary teeth was 2.1 % in boys, 1.4% in girls, and 1.8% for both sexes combined. The most common supernumerary teeth were the mesiodens (76.9%), followed by the supernumerary premolar (23.1 %). The affected male-female ratio was 1.6: 1.0. The prevalence of congenital missing teeth in this study was similar to in studies of Japanese, Danish, American and German. The frequency of hyperdontia was lower in this study than in studies of Chinese children, Japanese and American.

• 대한구순구개열학회지
• /
• 제4권2호
• /
• pp.69-78
• /
• 2001

Alveolar cleft exists in 75% of cleft patients, In alveolar cleft patients, alar base is widening, palatal fistular formation, maxillary growth disturbance & tooth loss of adjacent area is raised, Alveolar bone grafting, especially iliac bone grafting, is a general treatment method. As operation timing, bone grafting is classified with primary, early secondary, secondary, & late secondary, Here we report cleft width, marginal bone height, bone resorption rate, grafted shape & bone densities after secondary iliac bone grafting was done in the Dept. of oral and maxillofacial surgery of chonbuk national university hospital. We compared cleft width to bone resorption rate and grafted shape. Also, alveolar bone densities of grafted and contralateral site was compared with Emago 3 package? (Oral Diagonostic System, The Netherlands), The data obtained were analyzed using Spearman's rho coefficients and sign test with SPSS for window, The results were obtained as follows. 1. As alveolar cleft width is increase, bone resorption rate is, too. This relation showed significant difference(P<.01). 2, In proximal & distal area, alvolar cleft width and bone graft contour after bone grafting had a reverse proportional difference. It was not significant difference(P>.05). 3. After 3 month, in bone density results by using Emago 3 package? with periapical standard view, occlusal view & panoramic view, differences between grafted bone and alveolar bone of contralateral site didn't show a significant difference(P>.05). Thus, differences of bone densities in the alveolar bones didn't exist.