1.A case of bronchial obstruction due to occult aspiration of a tooth.
Jung Hyun CHANG ; Se Kyu KIM ; Kyung Young CHUNG ; Dong Won MIN ; Dong Hwan SHIN ; Hong Leoyl LEE ; Sung Kyu KIM ; Won Young LEE
Tuberculosis and Respiratory Diseases 1993;40(4):442-448
No abstract available.
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2.A comparative study on subgingival microbial composition between natural teeth and osseointegrated implants.
Yong Sik LIM ; Yung Soo KIM ; Chang Whe KIM
The Journal of Korean Academy of Prosthodontics 1993;31(3):411-422
No abstract available.
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3.A study of ancient Korean teeth.
Chong Youl KIM ; Chang Lyuk YOON
Korean Journal of Legal Medicine 1992;16(1):30-46
No abstract available.
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4.Influence of individual tooth tray on the teeth with undercut in impression taking.
Kowang Won SEO ; Sang Wan SHIN ; Jeong Yeol LEE
The Journal of Korean Academy of Prosthodontics 2004;42(1):11-20
PROBLEM: The several studies were reported to the effects of individual tooth tray with the parallel tooth, but not reported to the effect of individual tooth tray with severe undercut in impression making. PURPOSE: The purpose of this study is to examine the effect of individual tooth tray; 1) the accuracy of impression in in terms of distance. 2) reproducibility of pocket. MATERIAL AND METHODS: In this study, a metal model with 3 teeth including tooth prepared 30-degree undercut and gingival crevice of the depth 5mm, width 0.4mm was cast. Impressions of the metal model were taken in 5 times used 4 kinds of impression materials with individual tooth tray and another impression taking were made with conventional method without individual tooth, used same materials, procedure. The stone models were made. Distances between abutments were measured with a Micromeasurescoup-mm. RESULT: The following results were obtained; 1. In the comparison of inter-abutment distance between parallel tooth without individual tooth tray, 4elastomeric materials have not significant difference to the metal model(p>0.05). 2. In the comparisonof inter-abutment distance with undercut tooth without individual tooth tray, 4elastomeric materials have a significant difference to the metal model(p<0.05), especially polyether's dimensional change is large. 3. If individual tooth tray was used to take impression in abutment teeth with severe undercut, more stable results was achieved easily than conventional metho.(p>0.05). 4. It is not true that the pressure of impression material with individual tooth tray increased to gingival sulcus. CONCLUSION: By the results, I knew the fact that individual tooth tray was useful impression method on the teeth with severe undercut for the dimensional stability. Also, I could not confirm the fact that individual tooth tray would increase the penetrating pressure into cervice.
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5.Predictable management of the cracked tooth.
Restorative Dentistry & Endodontics 2016;41(1):79-79
No abstract available.
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6.The analysis of initial apical file size before and after coronal flaring.
Ho Keel HWANG ; Chan Ho PARK ; Seong Chul BAE
Journal of Korean Academy of Conservative Dentistry 2003;28(1):64-71
The purpose of this study was to compare the initial apical file(IAF) first file that fits to the apex in each canal before and after early flaring to analyze if the size of file to fit to the apex would increase after flaring. Eighty anterior teeth with complete apical formation and patent foramens were selected. The samples were randomly divided into 4 groups(GG, OS, GT, PT Group) of 20 teeth each. A file was fit to the apex in each canal and that size recorded. Radicular flaring were completed using different types of instruments. After flaring a file was again fit to the apex in the same manner as before and its size recorded. The results of this study were as follows: 1. The mean diameter of IAF before flaring(file diameters in mmx10-2) was 19.81+/-8.32 before and 25.94+/-9.21 after(p<0.05). 2. The increase in diameter of IAF was approximately one file size for all groups. 3. Ranking of increasing diameter of IAF were GG>GT>OS>PT group. There was a statistically significant difference between before and after flaring(p<0.05). 4. Ranking of the time for flaring were GG>GT>OS>PT group. There was a statistically significant difference between GG group and other groups(p<0.05). 5. In the case without change of IAF diameter, they showed decrease in force after flaring when IAF was pulled out from root canal(p<0.05). This study suggested that early radicular flaring increases the file size that is snug at the apex, and awareness of that difference gives the clinician a better sense of canal size. Early flaring of the canal provides better apical size information and with this awareness, a better decision can be made concerning the appropriate final diameter needed for complete apical shaping.
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7.3-D FEA of three different single tooth abutments : Cement-retained Vs Screw-retained.
Jung Min LEE ; Youn Soo KIM ; Chung Whe KIM ; Yong Ho KIM
The Journal of Korean Academy of Prosthodontics 1999;37(2):269-288
No abstract available.
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8.Considerable factors for final occlusion in pre-orthodontic lower anterior segmental surgery and its availability.
Baek Soo LEE ; Hyun Jung CHOI ; Kwang Ho NAM ; Dong Mok RYU
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2003;29(1):43-47
Anterior set back segmental surgery has been used for shortening the period of orthodontic treatment in case of bimaxillary or maxil-lary protrusion. In most cases, it requires pre-operative orthodontic treatment. Through properly performed leveling and tooth aligning, the operative porcedure can be easier and post-operative occlusal stability can be increased. But it takes time for orthodontic treatment. Recently, we have been using anterior segmental surgery before orthodontic treatment and have reliable results from that. Therefore, we have to consider arch shape, curve of Spee, tooth selection to be extracted for obtaining of post-operative occlusal stability without preoperative orthodontic treatment.
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9.Construction procedure of tooth positioner.
Hee Moon KYUNG ; Jae Hyun SUNG
Korean Journal of Orthodontics 1982;12(1):61-68
No abstract available.
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10.Analysis of force system developed by continuous straight archwire.
Kwang Chul CHOY ; Byung Hwa SOHN
Korean Journal of Orthodontics 1996;26(3):281-290
Determination of force system and prediction of side effects from unbent straight wire engaged in edgewise bracket is clinically very difficult because it is statically indeterminate system. This study is to develop a linear beam theory that explains the force system for straight wire engaged in edgewise bracket regardless of geometry(a/b), material, cross section of wire, and interbracket distance. 1. Formula for force system of bilateral fixed end beam was derived. 2. It is possible to calculate force system of each tooth engaged in continuous straight wire. 3. The possibility and location of permanent deformation can be predicted.
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