관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

비소가 가견 치아와 치조골에 미치는 영향

최순철 慶北大學校 齒科大學 1989 慶北齒大論文集 Vol.6 No.1

About 0.1㎎ of the arsenic trioxide was inserted into the pulp chambers of the third and the fourth right premolars in 10days. The arsenic trioxide was removed after 1 week in 3 dogs and after 2days in 7dogs. The serial standardized periapical radiographs using XCP instruments and resin bite blocks were taken twice in a week to the fourth week and weekly thereafter for a total of 8 weeks. All radiographs were evaluated by the visual examination on the viewbox. The obtained results were as follows; 1) In 3 dogs removing the arsenic trioxide after 1 week, all the third and the fourth right premolars were dislodged without significant radiographic change in the adjacent bone tissue. 2) In 7 dogs removing the arsenic trioxide after 2 days, the first radiographic sign of the bone destruction was observed at 7 and 10 days. 3) Variable types of alveolar bone destruction, external root resorption, periapical lesions and sequestrum formation were observed.

하악 제1대구치의 치근 만곡에 영향을 주는 요인

최항문,이원진,허민석,이삼선,김정화,최순철,박태원 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Purpose : To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Materials and Methods : Twenty six 1st graders whose mandibular 1st molars just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal plane angle, gonial angle, and gonion-gnathion distance (Go-Gn distance) were measured. In panoramic radio graph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. Results : The Pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p<0.05). There was no significant correlation between elongated root length and longitudinal variations of all variables. The resulting regression equation was Y=10.209+0.208X_(1)+0.745X_(2) (Y: root angle, X_(1): variation of occlusal plane-tooth axis angle, X_(2): variation of ramus-occlusal plane angle). Conclusion: It was suspected that the reasons of root curvature were change of tooth axis caused by contact with 2nd deciduous tooth and amount of mesial and superior movement related to change of occlusal plane. (Korean J Oral Maxillofac Radiol 2006; 36 : 55-62)

두부위치에 따른 안면골의 파노라마방사선사진상

최순철 大韓口腔顎顔面 放射線學會 1989 Imaging Science in Dentistry Vol.19 No.1

The author has evaluated the panoramic image clarity of the midfacial anatomic structures in dry skull according to the skull position. The radiopaque markers were attached to the anatomic structures: infraorbial rim, upper and lower borders of zygomatic arch, pterygomaxillary fissure, lateral pterygoid plate, pyriform aperture of nasal cavity, lateral wall of maxilla. orbital floor, infraorbital foramen, and nasal floor. Position of the skull were divided into four groups. standard, 25mm forward, chin-down, chin-up position. The results were as follows: 1. The pynform aperture of nasal cavity, lateral wall of the maxilla, orbital floor, infraobital foramen and nasal floor did not cast any discernible image. 2. Nearly all images of midfacial structures were blurred in the chin-up position. 3. The forward position provided good visualization of the maxillary sinus. 4. The chin-down position provided good visualization of the zygomatic arch, pterygomaxillary fissue, and lateral pterygoid plate.

Orthopos^� 파노라마방사선촬영기의 각종 프로그램에 다른 흡수선량

최순철,이설미 大韓口腔顎顔面 放射線學會 2001 Imaging Science in Dentistry Vol.31 No.4

Purpose : The objective of this study was to estimate the radiation absorbed doses in certain critical organs in the head and neck region with 16 imaging programs available on the Orthopos^R panoramic machine. Materials and Methods : A Rando phantom and LiF TLD chips were used for dosimetry. The absorbed doses were measured at the thyroid gland, the submandibular gland, the parotid gland, the mouth floor, the maxillary sinus, the brain, the mandibular body, the mandibular ramus, the 2nd cervical spine and the skin over TMJ area. Results : The overall absorbed doses with imaging programs available on the Orthopos^R panoramic machine were much less than that of standard program (program 1) except program 8, 11, and 16. Generally, the absorbed doses to the bone marrow of the mandibular ramus and the parotid gland were high, but the absorbed doses to the bone marrow in the mandibular body, brain, maxillary sinus, and, especially, the thyroid gland were very low. Conclusion : The modified imaging programs available on the Orthopos^R panoramic machine can be effectively used in aspect of radiation protection. (Korean J Oral Maxillofac Radiol 2001; 31 : 215-9)

측두하악관절내장증에서 하악과두운동과 측두하악관절조영상의 상호관계

최순철,박태원,유동수,이은숙 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.2

Arthrography of the temporomandibular joint is a useful method of demonstrating the soft tissue abnormalities related to disc dysfunction. In this study, 19 asymptomatic joints, 31 joints with anterior disc displacement with reduction, 31 joints with anterior disc displacement without reduction which were classified by arthrotomography under fluoroscopy were evaluated to determine the linear measurement of anterior recess of inferior joint space and the relationship between the condylar anterior translation and the severity of the internal derangements. Their fluoroscopic images were also evaluated to describe the characteristics of condylar paths in internal derangements of the temporomandibular joints. The results were as follows; 1. The mean lengths of the anterior recess in asymptomain group, reduction group, and non-reduction group were 8.7±1.6㎜, 11.2±1.7㎜, 12.8±1.7㎜ respectively. The length of the anterior recess was increased according to the severity of the internal derangements(p<0.05). 2. Linear measurements of anterior movement of condyle on maximum mouth opening were 13.1±4.2㎜, 15.9±4.1㎜, 5.0±3.7㎜ in asymptomatic group, reduction group, and non-reduction group respectively. Compared with aymptomatic group, reduction group showed hypermobolity of the condyle and non-reduction group showed hypomobility. 3. Condyles moved beyond the crest of articular eminence in 80% of reduction group and did not reach it in 70% of non-reduction group. 4. The condyle moved mainly superiorly in reduction group(66%) and horizontally in asymptomatic group(47%). There were no cases to move superiorly in non-reduction group.

이하선에 발생한 양성 림프상피성 병소

최순철,박태원,유동수,박래정 大韓口腔顎顔面放射線學會 1996 Imaging Science in Dentistry Vol.26 No.2

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 t2-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.

자발성 뇌실내출혈 환자에서 임상적 -전산화단층촬영상소견의 상관관계

황선철,김범태,장재칠,주교성,신원한,최순관,변박장 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.6

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).

방사선사진에서의 관절간극의 의의

최순철 대한 두개하악 장애학회 1996 대한두개하악장애학회지 Vol.8 No.1