치성각화낭과 단방성 법랑모세포종의 감별에 관한 방사선학적 연구

최갑식 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.1

The purpose of this study was to obtain some informations for the radiographic differential diagnosis between odontogenic keratocyst and unicystic ameloblastoma in the mandible. The author compared and analysed the clinico-radiographic features of 48 cases of odontogenic keratocyst and 32 cases of unicystic ameloblastoma. The obtained results were as follows: 1. Odontogenic keratocyst and unicystic ameloblastoma occurred the most frequently in the 2nd and 3rd decades, and both lesions occurred with slight predilection in males. The most frequent lesional site was molar area in odontogenic keratocyst(50.0%) and mandibular angle and ramus area in unicystic ameloblastoma(71.9%). 2. Cortical thinning and expansion were observed with simliar occurrences in odontogenic keratocyst(77.1%) and in unicystic ameloblastoma(72.9%). 3. Typical undulating lesional border was observed more frequently in odontogenic keratocyst(79.2%) than in unicystic ameloblastoma(46.9%). 4. Well-defined lesional outline occurred more frequently in odontogenic keratocyst(97.9%) than in unicystic ameloblastoma(53.1%). 5. Root resorption of adjacent teeth occurred more frequently in unicystic ameloblastoma(65.2%) than in odontogenic keratocyst(18.8%) respectively, but loss of lamina dura was frequently observed in odontogenic keratocyst(79.2%). And tooth displacement occurred more frequently in odontogenic keratocyst(50.0%) than in unicystic ameloblastoma(17.4%). 6. Displacement of mandibular canal occurred more frequently in odontogenic keratocyst(75.0%) than in unicystic ameloblastoma(61.5%). 7. Inhomogeneous lesional radiolucency occurred more frequently in unicystic ameloblastoma(53.1%) than in odontogenic keratocyst(39.6%).

仁祖朝 政治의 理氣論的 패러다임 : 災異論을 중심으로 Focused on the Political Debates on Portents

김갑천 서울대학교 사회과학연구원 1998 한국사회과학 Vol.20 No.4

口內全顎標準放射線寫眞 撮影時 撮影法과 필름維持法에 따른 撮影上의 失策

崔甲植,卞鍾秀,崔珣哲 大韓口腔顎顔面 放射線學會 1986 Imaging Science in Dentistry Vol.16 No.1

75명의 치과대학 4학년생들이 촬영한 300예의 구내전악표준방사선사진들을 촬영법과 필름의 유지법에 따라 필름들을 피촬영자의 엄지나 검지로 유지하고 등각법으로 촬영한 경우(Ⅰ군), 필름을 Rinn Snap-A-Ray기구로 유지하고 등각법으로 촬영한 (Ⅱ군), 필름을 Rinn XCP 기구로 유지하고 Short cone에서 평행법으로 촬영한 경우(Ⅲ군), 필름을 Rinn XCP기구로 유지하고 Long cone에서 평행법으로 촬영한 경우 (Ⅳ군)으로 분류하여 75예의 구내전악표준방사선사진으로 구성된 각 군의 재촬영의 조사하여 각 군에서 가장 많이 나타난 실책의 종류와 부위, 그리고 구내전악표준방사선사진 1회당 평균재촬영매수에 대해 아래의 결과를 얻었다. Ⅰ군 : Incorrect film placement(47.8%)와 상악 견치부(26.9%)였으며 0.89매였다. Ⅱ군 : Incorrect film placement(44.0%)와 상악대구치부(28.6%)였으며 1.12매였다. Ⅲ군 : Incorrect film placement(79.1%)와 상악대구치부(32.0%)였으며 2.05매였다. Ⅳ군 : Incorrect film placement(67.7%)와 상악대구치부(30.7%)였으며 1.69매였다. 평균재촬영매수에서는 같은 촬영법인 Ⅰ군과 Ⅱ군간에서와 Ⅲ군와 Ⅳ군간에서는 유의한 차가 나타나지 않았으나(P>0.05),등각촬영법의 군(Ⅰ+Ⅱ)보다 평행촬영법의 군(Ⅲ+Ⅳ)에서 0.86매 많았다(P<0.01). The purpose of this study was to investigate the numbers and causes of retakes in 300 complete mouth radiographic surveys made by 75 senior dental students. According to radiographic techniques and film holding methods, they were divided into 4 groups: GroupⅠ: Bisecting-angle technique with patient's fingers. GroupⅡ: Bisecting-angle technique with Rinn Snap-A-Ray device. GroupⅢ: Paralleling technique with Rinn XCP instrument(short cone) GroupⅣ: Paralleling technique with Rinn XCP instrument(long cone) The most frequent cause of retakes, the most frequent tooth area examined, of retakes and average number of retakes per complete mouth survey were evaluated. The obtained results were as follows: GroupⅠ: Incorrect film placement (47.8%), upper canine region, and 0.89. GroupⅡ: Incorrect film placement (44.0%), upper molar region, and 1.12. GroupⅢ: Incorrect film placement (79.2%), upper molar region, and 2.05. GroupⅣ: Incorrect film placement (67.7%), upper molar region, and 1.69. The average number of retakes per complete mouth survey of paralleling technique (GroupIII+IV) was higher than that of bisecting-angle technique (GroupI+II)(p<0.01). There was no differnce between GroupⅠand Group Ⅱ, and between Group Ⅲ and Group Ⅳ in the average number of reatkes per complete mouth survey(p>0.05).

악골에 발생된 특발성 골경화증에 관한 방사선학적 연구

최갑식,최미,안상희 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.1

The purpose of this study was to evaluate the prevalence, distribution, and its relation with adjacent roots of idiopathic osteosclerosis in the jaws by means of the analysis of the 6,220 persons' full mouth periapical radiographs. And the following results were obtained; 1. The prevalence of idiopathic osteosclerosis in the jaws was revealed to be 2.43% in total examined persons, and there was a higher prevalence in females(3.12%) than in males(1.68%) 2. There was a higher prevalence in the mandible(94.3%) than in the maxilla(5.7%), and the most frequently involved area was the mandibular premolar area(51.9%), followed by mandibular molar area(21.52%). 3. According to the types of relation with adjacent roots, separated type(53.8%) in idiopathic osteosclerosis was the most frequent, followed by apical type(40.51%), interradicular type(e.18%), apical and interradicular type(2.51%) in descending order of frequency.

관전압 변화에 따른 방사선사진의 흑화도와 대조도

최갑식 慶北大學校 齒科大學 1990 慶北齒大論文集 Vol.7 No.2

The purpose of this study to evaluate the influence on radiographic density and contrast of 7-steps aluminum stepwedge according to kilovoltage changes(65-85 kVp range). And the influence on radiographic interpretation of experimentally produced bony lesions under kVp related radiographic densities is also examined. The following results were obtained. 1. The radiographic density of the aluminum stepwedge is increased with the increase of kVp, and increasing tendency of radiographic density is decreased with the increase of aluminum steps. 2. The range of radiographic contrast reveals 0.09-0.32 at 65-85 kVp range, and difference of radiographic contrast score is decreased with the increase of aluminum steps. 3. There is no influence on radiographic interpretation of experimentally produced bony lesions under the radiographic density range of 0.75-1.49.

파노라마방사선사진상의 이공에 관한 연구

최갑식,배용철,김동윤,손정익 경북대학교 의학연구소 1999 경북대학교병원의학연구소논문집 Vol.3 No.1

The purpose of this study was to evaluate the position and shape of mental foramen in panoramic radiographs. For this study, panoramic radiographs were obtained from the 200 adults and evaluated the position and shape of mental foramen. According to various positional changes in panoramic radiographs of the patients, the author also obtained panoramic radiographs from the 100 adults and then evaluated the positional and shape changes of mental foramen. The following results were obtained: 1. Shapes of metal foramen were observed elliptical(43.3%), round or oval(42.5%), unidentified(7.5%) and diffuse (6.7%) type in descending order of frequency. 2. Horizontal position of mental foramen were most frequently observed at the 2nd premolar area(54.2%), and area between the 1st premolar and 2nd primolar(43.1%), area between the 2nd premolar and 1st molar(2.7%) in descending order of frequency. 3. Vertical position of mental foramen were most frequently observed at the inferior of apex(88.2%), and at apex (9.7%), overlap with apex(1.9%), superior of apex(0.2%) in descending order of frequency. 4. According to various positional changes in panoramic radiographs of the patients, shape changes of mental foramen were more obviously observed at the forward 10mm and chin down 10。 positioned panoramic radiographs. And changes of horizontal and vertical position were observed in similar to compared with normal positioned panoramic radiographs.

치아형태 이상에 관한 방사선학적 연구

최갑식 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.1

The purpose of this study was to evaluate the prevalence and distribution according to the types of tooth shape anomalies in permanent teeth of 6,082 persons by means of analysis of the full mouth periapical radiographs. And the following results were obtained; 1. Among tooth shape anomalies, the highest incidence was observed on dilaceration (20.14%), followed by dens invaginatus(3.02%), peg lateralis(1.48%), taurodontism(0.34%), dens evaginatus(0.33%), talon cusp(0.20%), fusion(0.07%) and gemination(0%) in descending order of frequency. 2. Peg lateralis, dens invaginatus and dilaceration occurred more prevalent in females, and other types of tooth shape anomalies occurred more prevalent in males. 3. Dens evaginatus and taurodontism occurred with bilateral tendency, but other anomalies occured with unilateral tendency. 4. As to the involved teeth, maxillary lateral incisors were the most frequently involved teeth on peg leateralis, dens invaginatus and talon cusp. And the mandibular premolars were the most frequently involved teeth on dens evaginatus, the maxillary first molars were on taurodontism, the maxillary second premolars were on dilaceration, and the mandibular incisors and canines were on fusion.

섬유성이형성증과 골화섬유종의 방사선학적 감별진단

최갑식 慶北大學校 齒科大學 1993 慶北齒大論文集 Vol.10 No.1

저자는 섬유성 골병소 중 임상 방사선학적 및 조직병리학적으로 확진된 골 형성기이후의 섬유성이형성증 49증례와 골화섬유종 14증례의 방사선학적 소견을 비교하여 다음의 결과를 얻었다. 1. 섬유성이형성증은 10대에서, 골화섬유종은 20대와 30대에서 호발되었으나, 두 질환 모두 여성에서 다소 호발되었다. 2. 초진시의 주소는 대부분 약골의 무통성 팽창이었으며, 섬유성이형성증은 상악(61.1%)에서 다소 많았으나 골화섬유종은 하악(92.9%)에서 대부분 발생되었으며, 병소의 대부분은 구치부에서 관찰되었다. 3. 병소의 크기는 섬유성이형성증에서 다소크게 나타났으며, 하악에서 병소의 형태는 섬유성이형성증에서는 방추형이었으나 골화섬유종은 구형 또는 타원형이었다. 4. 섬유성이형성증의 병소는 방사선불투과상(63%)이 다소 많았으나, 골화섬유종은 대부분 방사선투과상과 방사선불투과상의 혼합상(92.9%)으로 나타났으며, 병소 내부의 방사선불투과상의 형태는 섬유성이형성증에서 비교적 균일하게 나타났으나, 골화섬유종에서는 중심부에서부터 주변부로 확장되는 양상이었다. 5. 섬유성이형성증의 모든 병소에서 주변 정상골과의 경계를 구분할 수 없었으나, 골화섬유종의 병소에서는 비교적 명료한 경계가 관찰되었다. 6. 피질골의 팽융과 비박이 대부분의 병소에서 관찰되었으나 섬유성이형성증에 비해 골화섬유종의 병소에서 피질골의 팽융정도가 심했다. 7. 치조백선의 소실, 치아의 편위, 하악관의 전위는 두 질환 모두에서 관찰되었으나, 치근흡수는 섬유성이형성증의 병소에서는 관찰되지 않았고 골화섬유종의 병소에서만 관찰되었다. The author observed and compared the radiographic features of 49 cases of the fibrous dysplasia and 14 cases of the ossifying fibroma in the osteoblastic or mature stage radiologically and histopathologically. The obtained results were as follows: 1. Fibrous dysplasia occurred most frequently in the 2nd decade, but ossifying fibroma in the 3rd and 4th decades, and both lesions occurred with slight prediection in females. 2. In most cases, chief complaints were painless facial swelling. And 61.1% of fibrous dysplasia occurred in the maxilla, 92.9% of ossifying fibroma in the mandible, and most of these lesions occurred in the premolar-molar region. 3. In the mandibular lesions, ossifying fibroma was shown more oval and round shape, but fibrous dysplasia was shown fusiform shape. 4. Fibrous dysplasia was shown homogeneously distributed, complete radiopaque shadow at 63%, and ossifying fibroma was shown concentric, mixed appearance of radiolucent and radiopaque shadow at 92.9%. 5. Fibrous dysplasia was entirely shown poorly outlined and blended to normal surrounding bone, but ossifying fibroma was shown well-defined border. 6. Cortical thinning and expansion were observed in these lesions, but degree of cortical expansion was more severe in ossifying fibroma than fibrous dysplasia. 7. Loss of lamina dura, tooth displacement, and displacement of mandibular canal were observed in both lesions, but root resorption was observed in ossifying fibroma only.

하악에 발생된 법랑모 섬유육종

최갑식,이은숙,박태원,최미 大韓口腔顎顔面 放射線學會 1993 Imaging Science in Dentistry Vol.23 No.2

The ameloblastic fibrosarcoma is the malignant counterpart of the ameloblastic fibrosarcoma in which the mesenchymal element has become malignant. Clinically it frequently occurs in the 3rd and 4th decades, and more frequent in the mandible than in the maxilla. Radiographic features are apparent multiocular radiolucency with ill-defined border. The authors experienced two cases of ameloblastic fibrosarcoma of the mandible in a 26-year-old male and a 48-year-old female patients who suffered from pain and swelling on the affected area. And we discussed the clinical, radiological and histopathological features of this disease with a brief review of the literatures.

파노라마 X선사진상의 무명선에 관한 연구Ⅱ

최갑식,이강숙 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.1

The purpose of this study was to investigate the changes of the shape of the panoramic innominate line and alsoto examine the relation of the panoramic innominate line to maxillary posterior wall according to positional changes in panoramic radiographs of the patients who had no pathoses in the maxillary sinus and adjacent bony structures. Thus these panoramic radiographs were obtained and evaluated in standard, forward 10mm, backward 10mm, chin down 10°,and chin up 10°positions. And the following results were obtained: 1.Panoramic innominate lines were not changed in shape according to various positional changes in panoramic radiography. 2.The panoramic innominate line was observed to be more clear images and decreased distance to the posterior wall of maxillary sinus at forward 10mm and chin down 10°positions. And the panoramic innominate line was observed more blurred images and increased distance to the posterior wall of maxillary sinus at backward 10mm and chin up 10°positions.