• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권2호
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• pp.236-244
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• 1996

The maxillary sinus elevation for simultaneous placement of dental implants and combination grafts of autogenous bone harvested from the maxillary tuberosity and demineralized freeze dried bone and HA is relatively easy and safely done under local anesthesia in out patients clinic. This article is to introduce the sinus floor elevation method which has been performed to 5 patients in the department of Dentistry/Oral & Maxillofacial Surgery, Kangnam Sacred Heart Hospital, Hallym University, from 1993.

• 대한치과교정학회지
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• 제27권3호
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• pp.445-456
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• 1997

본 연구는 안면비대칭이 존재하는 사람에 있어서 상악치열궁의 좌우측 치아에서 전후방, 측방 그리고 수직 비대칭의 존재 유무와 상악 중절치의 치축경사 변화 정도및 이러한 비대칭 양상과 하악골의 편위 정도와의 상관성을 알아보고 정상군과의 비교를 통하여 상대적인 비대칭의 양상을 파악하고자 고안되어졌다. 부산대학교병원 교정과에 내원한 환자들 중 하악골의 편위를 동반한 골격성 비대칭을 가진 21명을 안면비대칭군으로 선정하고 임상적으로 양호한 안모를 가지고 골격성의 비대칭이 없는 20명을 정상군으로 선정한 후 상악치열궁모형과 정모두부방사선규격사진을 이용하여 상악치열궁을 이루는 좌우측 치아의 위치와 상악 중절치 치축경사, 그리고 상악 제1대구치의 수직위치를 계측하고 분석하여 다음과 같은 결과를 얻었다. 1. 안면비대칭군에서 치성 비대칭의 정도와 하악의 편위정도 사이에는 높은 상관성을 나타내지 않았다. 2. 안면비대칭군에서 악골이 편위된 측의 치아들이 더 측방으로 확장되어 있었다. 그리고 상악 제1대구치와 제2대구치의 전후방위치와 상악 중절치의 치축경사에서 차이가 있었다. 3. 안면비대칭군에서 측방 비대칭은 후방치아로 갈수록 증가되었으며 전후방 비대칭에 비해 더 크게 나타났다.

• 대한치과보철학회지
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• 제45권2호
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• pp.228-239
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• 2007

Statement of problem: Following tooth loss, the edentulous alveolar process of maxilla is affected by irreversible reabsorption process, with progressive sinus pneumatization leads to leaving inadquate bone height for placement of endosseous implants. Grafting the floor of maxillary sinus by sinus lifting surgery and augmentation of autologous bone or alternative bone material is a method of attaining sufficient bone height for maxillary implants placement and has proven to be a highty successful. Purpose: This study was undertaken to clarify the morphometric characteristics of inferior maxillary sinus and alveolar process for installation of implants. Material and method: Nineteen skulls (37 sinuses, 10M / 9F) obtained from the collection of the department of anatomy and cell biology of Hanyang medical school were studied. The mean age of the deceased was 69.9 years (range 44 to 88 years). The distance between alveolar border and inferior sinus margin at each tooth, the height of alveolar process and the thickness of cortical bone of the outer and inner table of alveolar process and the inferior wall of maxillary sinus were measured. Results and Conclusion: 1. The septum of inferior maxillary sinus were observe 28 sides (76.%) and located at the third molar (52.6%) and the second molar (26.3%). The deepest points of inferior border of maxillary sinus were located the first or second molar. The distance between alveolar margin and the deepest point of inferior maxillary sinus is $9.7{\pm}4.9mm$. 2. The length of the outer table of alveolar process were $4.9\sim28.2mm$ and the shortest point was between the first and the second molors. The thickness of them were $0.9\sim3.2mm$. The length of the inner table of alveolar process were $7.4\sim25.8mm$ and the shortest point was between the first and the second molars. The thickness of the were $0.9\sim4.6mm$. The results of this study are useful anatomical data for installing of maxillary implants.

• 대한소아치과학회지
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• 제37권4호
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• pp.519-525
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• 2010

이소맹출(ectopic eruption)은 여러 가지 원인들에 의해 치아가 비정상적 위치로 맹출하는 경우를 말하며, 주로 상악 제1대구치, 하악 측절치 그리고 상악 견치에서 발생된다. 이소맹출 한 상악 제1대구치는 정상보다 근심방향으로 맹출하여, 동측상악 제2유구치의 원심협측 치근을 흡수시키며, 결국 상악 제1대구치는 상악 제2유구치 하방에 걸리게 된다. 상악 제1대구치는 저작기능 및 교합에 중요한 역할을 하고 있으므로, 이소맹출 한 상악 제1대구치는 적절한 위치로 이동이 필요하다. 상악 제1대구치를 적절한 위치로 이동하기 위한 치료방법으로는 brass wire 또는 elastic ring을 이용한 separation, 상악 제2유구치의 원심면 삭제, finger spring을 포함한 고정성 또는 가철성 장치, 상악 제2유구치를 발치한 후 공간유지장치 또는 공간회복장치의 이용 등이 있다. 본 증례들은 강릉대학교 치과병원에 내원한 환자들에서 이소맹출 한 상악 제1대구치를 기성금관의 재시적, brass wire의 적용, active plate를 이용하여 적절한 위치로 이동시켜 양호한 교합을 이루었기에 이를 보고하는 바이다.

• 대한소아치과학회지
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• 제32권3호
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• pp.550-556
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• 2005

매복치아란 어떤 원인에 의하여 구강점막이나 악골내에서 치아의 맹출이 중지된 상태를 말하며, 악궁내의 어떠한 치아도 매복될 수 있으나 가장 흔하게 이환되는 치아는 상, 하악 제 3대구치, 상악 견치, 상, 하악 제 2소구치, 상악 중절치의 순으로 나타난다. 이 중 상악 영구 전치의 매복률은 0.1-0.5% 정도이며 매복 원인으로는 여러 가지가 있으나 유전치의 외상, 과잉치, 치근단 병소로 인한 매복이 흔하며 조기에 적절히 치료되지 못하면 정중선의 변위, 인접치에 의한 맹출공간 감소, 치조골 높이의 차이 등의 결과를 유발한다. 치료로는 주기적 관찰방법, 매복치의 맹출로가 정상이며 치근이 미완성일 경우 상부 연조직과 경조직을 단순히 제거하여 맹출을 유도하거나 외과적 노출 후 매복치를 교정하는 방법, 치아이식술, 발치 등을 시행할 수 있다. 본 증례들은 상악 중절치의 맹출 지연을 주소로 본원에 내원한 환아들로 상악 중절치의 변위 매복을 외과적 노출과 교정적 견인을 시행하여 양호한 결과를 얻어 보고하는 바이다.

• 치과방사선
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• 제21권2호
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• pp.297-306
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• 1991

The purpose of this study is to improve the availabilities of radiographic technics as diagnostic methods to evaluate maxillary sinus in dental clinic. For the morphologic study of maxillary sinus, 20 dry maxillas were used and intraoral standard views, orthopantomograms, and skull P-A views were taken. For measuring the vertical image magnification rates, 5 sites in maxillary molar regions of 5 dry mandibles were selected radndomly and 25 wires of the determined sizes for selected portions were attached to the sites, after then, intraoral radiograms with bisecting technic and orthopantomograms were taken. The acquired results were as follows: 1. The anterior extension of the maxillary sinus on orthopantomogram was the distal side of the canine in 45.45% of subjects, the mesial side of the canine in 27.27%, the lateral incisor in 9.09%, the mesial side of the 1st premolar in 9.09%, and the mesial side of the 2nd pre-molar in 9.09%. 2. The positional relationship between the floor of maxillary sinus and the apex of alveolar socket revealed superimposed type in 58.3% of subjects, approached type in 33.3%, and separated type in 8.4%. 3. The morphology of inferior border of maxillary sinus was simple V or U shape in edentulous stage and V or wide U shape in alveolar socket stage. 4. The vertical image length on intraoral film taken by bisecting technic was magnified by 27.23% on the average and the length on orthopantomogram by 12.35%. 5. The inferior borders of maxillary sinus coinciding with each of the areas bearing the anterior and the posterior teeth on skull P-A view were determined.

• Imaging Science in Dentistry
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• 제30권2호
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• pp.109-116
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• 2000

Purpose : To compare the size and bone wall thickness of the maxillary sinus in normal, preoperative and postoperative maxillary sinusitis patients. Materials and Methods : The author analyzed CT images of both left and right maxillary sinuses in 357 patients who visited Chonbuk National University Hospital between January 1997 and December 1998. The size and bone wall thickness of the maxillary sinus of normal, inflammatory and post-Caldwell-Luc groups were compared. Results: The significant differences of transverse, maximum medio-lateral, maximum supero-inferior dimensions and medio-lateral dimension at nasal floor level between normal and post-Caldwell-Luc groups were found (P<0.05). And the significant differences of antero-posterior dimensions between inflammatory and post-Caldwell-Luc group were found (P<0.05). But, no significant differences of vertical height dimensions between groups was found (P>0.05). The significant differences of postero-lateral, infero-lateral and medial wall thickness between normal and post-Caldwell-Luc groups were found (P<0.05). Conclusion : The results of this study will aid in the diagnosis and treatment of maxillary sinus diseases and post operative treatment planning.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제33권3호
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• pp.256-263
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• 2011

Purpose: The purpose of this study was to evaluate the effectiveness of autogenous tooth graft materials after maxillary sinus bone grafts. Methods: The study involved 23 implants in 22 patients who visited the Department of Oral and Maxillofacial Surgery and the Department of Periodontics, Chosun University Dental Hospital, in 2008 and received autogenous tooth graft materials for maxillary sinus bone grafts. Results: For eight patients with maxillary bone graft materials prior to implant placement, the healing period averaged five months. For eleven patients with simultaneous maxillary bone graft and implant placement, eight patients received a second surgery, with an average healing time of six months. Three patients had a longer observation period with only a fixture implanted. Three patients who received only a bone graft required more time to implant placement because of the lack of residual bone and also for personal reasons. Only 5 patients had biopsies performed and complications such as infection and dehiscence healed well. The application of autogenous graft materials to the maxillary bone graft sites did not exert any significant effects on the success rates. When a mixture of graft materials was used, the post-surgical bone resorption rate was reduced. Histological analysis showed that new bone formation and remodeling were initiated during the three-to-six month healing period. Bone formation capacity increased continuously up to six months after the maxillary bone graft. Conclusion: According to this analysis, excellent stability and bone-forming capacity were seen in cases where autogenous materials were used alone or mixed with other materials. Autogenous tooth graft materials may be substituted instead of autogenous bones.

• Imaging Science in Dentistry
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• 제47권1호
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• pp.33-37
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• 2017

Purpose: This study aimed to evaluate the prevalence of Haller cells and accessory maxillary ostium (AMO) in cone-beam computed tomography (CBCT) images, and to analyze the relationships among Haller cells, AMO, and maxillary sinusitis. Materials and Methods: Volumetric CBCT scans from 201 patients were retrieved from our institution's Digital Imaging and Communications in Medicine archive folder. Two observers evaluated the presence of Haller cells, AMO, and maxillary sinusitis in the CBCT scans. Results: AMO was observed in 114 patients, of whom 27 (23.7%) had AMO exclusively on the right side, 26 (22.8%) only on the left side, and 61 (53.5%) bilaterally. Haller cells were identified in 73 (36.3%) patients. In 24 (32.9%) they were present exclusively on the right side, in 17 (23.3%) they were only present on the left side, and in 32 (43.8%) they were located bilaterally. Of the 73 (36.3%) patients with Haller cells, maxillary sinusitis was also present in 50 (68.5%). On using chi-square test, a significant association was observed between AMO and maxillary sinusitis in the presence of Haller cells. Conclusion: Our results showed AMO and Haller cells to be associated with maxillary sinusitis. This study provides evidence for the usefulness of CBCT in imaging the bony anatomy of the sinonasal complex with significantly higher precision and a smaller radiation dose.

• 대한치과보철학회지
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• 제26권1호
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• pp.185-196
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• 1988

The purpose of this investigation was to analyze the color of natural teeth by means of the OFC-1001 DP colorimeter which could measure in Adams Coordinate System (L,a,b system). The subjects were the 164 persons (82 men and 82 women) ranged from the teen to the sixtieth who had come to infirmary of dental college, Chosun University. The colors of incisal third, middle third and cervical third of maxillary right incisor, maxillary right canine and maxillary right second premolar were examined after the teeth were cleaned, polished and dried. The data were analyzed statistically by means of SPSS (Statistical Package For the Social Science). The results were as follows. 1. The means of L(lightness), a (red chromaticity), b (yellow chromaticity) of all teeth were measured (Table 2,3,4). 2. The color of teeth was yellowish-gray or bluish-gray. 3. The L value and b value of the cervical third was greater than those of the incisal and middle third. 4. The L value of maxillary 2nd premolar was greater than those of maxillary incisor md maxillay canine. 5. The a & b values of maxillary canine were greater than those of maxillary incisor and maxillary 2nd premolar. 6. The average values of L,a,b of teeth between male and female were not significant. 7. The L values of teeth were decreasing and the b values of teeth were increasing as the age was increased, but there was no corelation between the a values and aging.