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RISS 인기검색어
- 검색키워드
- 저자 : 황병화(Hwang, Byoung-Ha) (검색결과 4 건)
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Biphosphonate(Etidronate disodium) 투여 후 치아이동에 따른 치근흡수 및 치조골 변화에 관한 연구
황충주(Chung-Ju Hwang),손병화(Byung-Hwa Sohn) 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.1
Many studies has been conducted concerning prevention of unnecessary complications such as root resorption during orthodontic tooth movement under various mechanical forces. Nowadays, the cause of the root resorption is not thought to be confined only to mechanical forces. But the factor that affects bone metabolism are thought to be major one of the predisposing factors. The light microscope and scanning electron microscope were used to the effects of 60gm, and 100gm of tipping force on root resorption of cats, which were treated with Etidronate disodium. The results were as follows: 1. In the 60gm control group, hyalinization on the compression site of periodontal ligament appeared after first week and second week. In the 60gm experimental group, it appeared after first week with low frequency. In the 100gm control group it appeared with high frequency by first and second week while in 100gm experimental group, it appeared with low frequency. 2. In the 100gm control group, resorption of the cementum and the alveolar bone rapidly increased after second week. In the 60gm experimental group, resorption or formation of alveolar bone and cementum didn´t appear all through the experimental period. 3. In the 100gm control group. formation of cementum and alveolar bone appeared after first week while in the 100gm experimental group, formation of cementum and alveolar bone appeared after second week and fourth week respectively. In the 60gm control group, formation of the cementum didn´t appear all through the experimental period. 4. In the control group, the root resorption of 100gm group was higher than that of 60gm group after second week, while in experimental group, root resorption didn´t appear regardless of the forces.
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실업팀 선수들의 자기관리행동, 자신감, 팀 만족, 경기력 수준의 관계 분석
강재원(Kang, Jae-Won),임승현(Lim, Seung-Hyun),황병화(Hwang, Byoung-Ha) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.1
The purpose of this study was to investigate the relationship between self-management, confidence, team satisfaction and performance among semi-pro team athletes. Questionnaires were provided to athletes of semi-professional teams (volleyball, track and field, kendo, ssireum, handball, fencing) in 2015 for analysis. Window SPSS Ver. 20.0 statistics program was used for the 512 samples. It concluded that (1) males scored higher than females in training management and confidence among self management behavior. Males also scored higher in work satisfaction and organizational concentration among team satisfaction. (2) For self management behavior according to athlete experience, willpower management and training management in self management behavior, confidence, organizational confidence in team satisfaction, and performance factors were all higher for athletes with more athlete experience. (3) Correlation among the six sub-factors of self management behavior, confidence, team satisfaction and performance all were positive correlations. (4) Willpower management, unique behavior management, training management, interpersonal relationship management, and body management) had positive impact on confidence and work satisfaction and organizational concentration, as well as performance. (5) Confidence had positive impact on work satisfaction and organizational concentration, as well as performance, while team satisfaction had positive impact on performance.
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손병화,황충주,황현식 대한치과교정학회 1993 대한치과교정학회지 Vol.23 No.1
We tried to evaluate frequencies and severities of malocclusion of various socioeconomic areas according to growth and development. To obtain objective validity, we used Handicapping Labiolingual Deviation(HLD) suggested by Draker, Treatment Priority Index(TPI) by Grainger, Handicapped Malocclusion Assessing Record(HMAR) by American Dental Association and American Association of Orthodontist. Seoul and Kwangju were selected as an urban group, Ahnyang as an middle socioeconomic group and Hwasun near the Kwangju area as an rural group. 140 (male 63, female 73) of 5th grade in 'E' elementary school students in Seoul, 202 (male 101, female 101) of 'S' elementary school students in Kwangju, 207(male 105, female 102) of 'H' elementary school students in Hwasun, and 100(male 49, female 51) of 'M' elementary school students of in Ahnyang of all the same grade were analyzed and we obtained the results as follows ; 1. TPI, HLD, and HMAR showed high coincidence and reproducibility between different observer. (p<0.01) 2. In comparison of TPI, HLD, and HMAR according to clinical decision, there was statistically difference between each other. (p<0.01) 3. As the severity of malocclusion increases there was high correlation between TPI and HLD, and between HLD and HMAR. (p<0.05) 4. With respect to differences between areas in TPI and HLD, there was statistically difference between Ahnyang and other areas. 5. In Seoul as an urban group there was a high incidence of periodic checkup and history of orthodontic treatment than other area. 6. Mode of feeding and posture during sleeping did not affect the severity of malocclusion. As a conclusion, TPI, HLD and HMAR are so reproducible and coincident that they can be used as a guide on evaluating the frequency and severity of malocclusion and determining the priority of orthodontic treatment to determine the need and supply of orthodontic treatment. Furthermore these indices can provide objectively valid data for establishing public health problem solution.
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손병화,황충주 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.2
Crowded group is composed of 60 subjects who visited Yonsei University for orthodontic treatment and has no history of orthodontic treatment. Noncrowded group is composed of 26 subjects who has no crowding, considered to have a normal occlusion and no history of orthodontic treatment. Currently available and approved analytic method was used. Interrelationship between tooth size and arch size, and it's correlation on tooth crowding was studied and the following results were obtained. 1.In comparison of sum of mesiodistal width, of crown size of teeth was greater in noncrowded group than that of crowded group on both arch.(P<0.01). 2.In comparison of arch lengths, the values measured from arch length 2 showed greater in noncrowded group(p<0.01). Also in crowded group, arch length 1 showed greater value than arch length 2 on both arch(p<0.01). 3.In comparison of arch widths, upper interlateral(p<0.01) and upper intercanine width (p<0.05) showed greater value in noncrowded group on upper arch and intermolar width showed greater value in noncrowed group on both upper and lower arches(p<0.05). 4.In comparison of arch perimeters, arch perimeter 2 was greater value in noncrowded group on both upper and lower arches(p<0.01). 5.Dentoalveolar disproportion was greater in noncrowded group on both upper and lower arches(p<0.01). 6.In lower incisors MD/FL ratio, the central and lateral incisors were greater in crowded group, but statistial significance was only in lateral incisors(p<0.01). 7.The irregularity index of lower incisors showed greater value in crowded group(p<0.01).
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