초등학교 아동 구치의 치면열구전색 효과

국승호(Seung Ho Gug),정학균(Hak Kyoun Jung),김동기(Dong Kie Kim) 조선대학교 구강생물학연구소 1998 Oral Biology Research (Oral Biol Res) Vol.22 No.2

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중합방법에 따른 치면열구전색재의 물리적 성질에 관한 연구

국승호(Seung Ho Gug),성진효(Jin Hyo Seong),김동기(Dong Kie Kim) 조선대학교 구강생물학연구소 1995 Oral Biology Research (Oral Biol Res) Vol.19 No.2

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중합방법에 따른 치면열구전색재의 물리적 성질에 관한 연구

국승호,성진효,김동기 朝鮮大學校 口腔生物學硏究所 1995 口腔生物學硏究 Vol.19 No.2

초등학교 아동 구치의 치면열구전색 효과

국승호,정학균,김동기 朝鮮大學校 口腔生物學硏究所 1998 Oral Biology Research (Oral Biol Res) Vol.22 No.2

Dental caries and periodontal disease are the major oral diseases. Especially, dental caries is the main cause of tooth loss in children. DMFT index in 12-year-old children in Korea has been increased such as 0.6 in 1972, 2.5 in 1979 and 3.1 in 1990. Approximately 50% or more of all the caries lesions in the mouth occur on the occlusal surfaces of the posterior teeth. Many children suffer from the dental caries. To relief the pain from the dental caries and to make their school-life enjoyable, we should prevent the dental caries, especially occlusal surface caries in children. The method available to prevent occlusal surface caries is sealants which occlude the deep pits and fissures of teeth and isolate the occlusal surfaces from the oral environments. As long as the sealants are retained, no more dental caries occur on occlusal surfaces. But if they are not retained fully or partially, it has a possibility that dental caries occur on occlusal surfaces. The purpose of this study is to evaluate the amounts of carious lesions developed by the retention type of the sealants and then to decide whether the lost sealants would be replaced or not, and the last, to evaluate the cost-benefit effect of the pit and fissure sealants. We will select 466 subjects who are from first to third grade children and have 1st molar in right and left side which is sound and has the deep pit and fissure. One side of 1st molar will be sealed(experimental goup), the other will be not sealed(control group). The results obtained as follows: 1. It took 5 minutes and 21 seconds in average to sealing on 1st molars. 2. The complete retention rate for light curing was 99.2% which was higher than for self curing. 3. In case of light curing, the complete retention rate was a little highly dried of cool air than dried of warm air. 4. It needs to progress and develop the incremental oral health care system as a way of national policy for child oral health.

중합방법에 따른 치면열구전색재의 물리적 성질에 관한 연구

국승호,성진효,김동기 대한구강보건학회 1996 大韓口腔保健學會誌 Vol.20 No.2

In order to progress the physical property of sealants for enhancing caries preventive effectiveness, the author used the argon laser in the range of visible light for curing sealants and analyzed the difference of the physical property between visible light curing sealants and argon laser curing sealants. The obtained results were as follows; 1. There was statically significant difference in compressive strength between laser curing sealants and visible light curing sealants(P<0.05). 2. There was statically significant difference in shear strength between laser curing sealants and visible light curing sealants in case of Teethmate-A and Superlux seal(P<0.05). 3. There was statically significant difference in surface microhardness between laser curing sealants and visible light curing sealants expect 3M Concise^(TM)(P<0.05). 4. The Physical property was more progressed by laser curing than visible light curing.

중합효소 연쇄반응법을 이용한 Fusobacterium nucleatum ATCC 25586 의 동정

국승호,성진효,국중기,김동기 대한구강보건학회 1999 大韓口腔保健學會誌 Vol.23 No.4

The purpose of the present study was to develop DNA probe and polymerase chain reaction (PCR) primer for rapid and accurate detection and identification of Fusobacterium nucleatum ATCC 25586. This study procedure includes (1) whole-genomic DNA extraction of Fusobacterium nucleatum ATCC 25586, (2) construction of the genomic DNA library, (3) screening of restriction fragment of genomic DNA, (4) identification of species-specific DNA probe by Southern blot hybridization, (5) determination of nucleotide sequences of species-specific DNA probe, (6) design of PCR primer, (7) PCR. Three restriction fragments of Fusobacterium nucleatum ATCC 25586 genomic DNA digested with the endonuclease Xba I were obtained. The probe F25 was shown to be hybridized with Fusobacterium nucleatum ATCC 25586 strongly. The nucleotide sequences of probe F25 (830 base pairs) was obtained by dideoxy-chain termination method. From that results, the specific primers (GSH1 & GSH2) to Fusobacterium nucleatum ATCC 25586 were designed. It has been found that primer GSH1 and GSH2 could detect Fusobacterium nucleatum ATCC 25586 using PCR. These data indicated that these DNA probe and PCR primers could be used to detect and identify the Fursobacterium nucleatum ATCC 25586.

영호남농촌지역 노인구강실태조사

정학균,국승호,김재곤,김동기 朝鮮大學校 口腔生物學硏究所 1998 口腔生物學硏究 Vol.22 No.1

Recently, as aging people increase, oral health care was recognized as essential factor. The aim of this study is utilizing oral hygiene state of aging people in country in oral health care project of aging people. Subjecs & methods of study is followed: Total subjects is compromised of 474 patients over 60 years and subjects of research is, Jun book(182), Jun nam(133), Kyung book(71), Kyung name(86) in each region. We investigated from September, 9, 1996 to October, 25, 1996. We got a conclusion from oral health care investigation. 1. Tooth brushing more than once per day is 84.63 percents of country agaed people and mean tooth brushing time is thirteen miniutes and there is no difference in age, sex. 2. About 41 percents of country aged people which wears dentures was fabricated their dentures in dental clinic and 59 percents of them was fabricated in unacceptable oral technique. 3. DMFT number was 3.8 per man in from 60 to 69 year old people and mean root caries tooth number was 0.2 per men and DMFT number was 4.7 man in average and root caries teeth number was 0.6 per men in more than 70 year old people. 4. Morbidity of periodontal disease is 2.2% in sound periodontal tissue, 15.4% in bleeding periodontal tissue, 56.5%in calculus forming periodontal tissue. 12.5% in shallow periodontal pocket forming tissue, 3.4 percents in deep periodontal pocket forming tissue of total subject teeth in from 60 to 69 year-old people and 0.9 percents in sound periodontal tissue, 15.7 percents in bleeding periodontal tissue, 58.3 percents in calculus forming periodontal tissue, 13.7 percent in shallow periodontal pocket forming tissue, 2.9 percents in deep periodontal pocket forming tissue in more than 70 year-old people. 5. The Rate of wearing dentures was 37.5 percents in jun book, 36.7 percent in Jun Nam, 23.2 percents in Kyung book, 43.6 percents in Kyung nam and 36 percents in total region. 6. It was showed 37.2 percents in denture wearing people should repair their dentures. 7. 33.6 percents of aged people needs denture fabrication regardless complete denture and partial denture. 8. It was investigated that the number of 3 units bridge which is needed was 0.23 percents of per man from 60 to 69 year-old people and the number of 4 units bridge was 0.21 percents, the number of 5 units bridge was 0.05 and the number of 6 units bridge was 0.04 in average in from 60 to 69 year-old people, and the number of 3 units bridge which was weared was 0.13 per man, the number of 4 unit bridge was 0.04, 5 units bridge was 0.02 and 6 units bridge was 0.07 in average in more than 70 year-old people.