• Restorative Dentistry and Endodontics
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• v.30 no.3
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• pp.149-157
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• 2005

Mechanical removals in decayed teeth have been performed using drill and sharp hand instruments. These methods have some disadvantages such as pain, local anesthesia and overextended cavities Therefore chemo-mechanical excavation of dentin carious lesions has been introduced. The purpose of this study was to evaluate the efficacy of traditional mechanical methods using burs and chemo-mechanical methods (Carisolv) of caries dentin. Mechanical caries removal was carried with low speed round bur Chemo-mechanical caries excavation was performed with Carisolv (Medi-team), using the Carisolv hand instruments. The mean time to remove caries with two different methods was evaluated and the data analyzed with SPSS software (ver 11.5) by t-test (p < 0.05). For histomorphometry of caries removal were also carried with mechanical or chemo-mechanical (Carisolv) methods from 20 extracted caries permanent molars. Complete caries removal was verified with a $\#$23 sharp explorers, Caries Detector (Kuraray Co. Japan), and standard apical radiography. 1. Chemo-mechanical method was taken more times than mechanical method (1.5 fold) (p < 0.05) 2. Excavation for caries took more time for molar lesion than premolar lesion, and the least time was taken to remove the caries in incisor lesion (p < 0.05). 3. There were no significant differences to remove the caries between the maxilla and mandible (p > 0.05). 4. The remaining carious dentin was detected after the ckemo-mechanical removal of the carious dentin, and no smear layer were seen after the mechanical and chemo-mechanical removal of the carious dentin.

• Proceedings of the KACD Conference
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• 2002.05a
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• pp.322-322
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• 2002

치경부 병소는 부적절한 칫솔질, 화학적 침식 및 차아의 굴곡 등의 여러 원인에 의해 크게 cervical abrasion, erosion 및 abfraction의 형태로 나타난다. 최근 노령 환자층의 증가와 치주 치료에 의한 구강내 치아 잔존율의 증가는 치경부 병소의 증가를 가져왔다. 이러한 치경부 병소는 지각과민증, 우식 및 심미적 이유 등으로 수복을 시행하며 구치부위에 작은 우식이 없는 치경부 병소가 있는 경우 환자에게서 지각과민증를 유발하지 않는 경우라면 수복을 시행하지 않을 수도 있지만, 많은 예에서 더 이상의 치아 및 치주 조직의 손상을 억제하고 치수의 보호를 위해서 수복을 시행한다. 특히 전치부의 경우에는 병소가 작고 우식에 이완되지 않았다 할지라도 그 심미적 측면 때문에 수복을 시행하는 예가 증가하고 있다.(중략)

• Proceedings of The Korean Society of Health Promotion Conference
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• 2009.05a
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• pp.83-83
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• 2009

본 연구는 한국인 노년층이 대표적으로 섭취하는 강도별 음식을 조사하고 각 음식별로 씹어 먹을 수 있는 음식들이 무엇인지를 조사하여 자신이 보유하고 있는 자연치아수와의 상관관계를 알아보아 자연치아의 건강도를 유지, 관리, 예방하는데 하나의 지표로 사용하고 더 나아가 국민구강건강향상에 이바지 하고자 실시되었다. 전국의 60세 남 녀 586명을 대상으로 치과의사와 치과위생사가 구강검사와 면접법으로 설문내용을 기록하는 방식으로 진행하였다. 수집된 자료는 SPSS WIN 14.0 프로그램을 이용하여 분석하였다. 분석기법으로는 잔존치아수와 저작능력간의 관계를 상관계수와 회귀분석으로 분석 검증을 실시하여 다음과 같은 결과를 얻었다. 1. 저작능력과 구강상태와는 치석, 동요도, 충전점수, 우식경험점수, 발거치아수, 임플란트 수, 자연치아수와 나이, 고혈압, 당뇨병, 기타질환, 흡연이 유의한 것으로 나타났다(p<0.05). 2. 회귀분석 결과 나이가 높을수록 저작능력이 감소하며, 자연치아수가 많을수록 저작능력이 높은 것으로 나타났으며 회귀방정식은 저작능력=79.417-(연령$\times$0.281)+3.813$\times$치아수와 같았다(p<0.05). 3. 회귀분석결과 저작능력점수와 자연치아수와의 관계가 가장 높은 것으로 나타났고 회귀방정식은 저작능력=3.817$\times$자연치아+58.694와 같았다(p<0.05). 4. 자연치아로 식사를 하기 위해서는 한국 노인의 주식인 밥과 김치정도를 잘 씹어 먹으려면 잔존 자연치아수가 18개 정도는 있어야 아주 잘 씹어 먹을 수 있고, 잘 먹으려면 12개의 자연치아가 있어야 하며, 육류를 잘 먹기 위해서는 최소한 18개는 있어야 잘 먹을 수 있고, 25개가 있으면 아주 잘 씹어 먹을 수 있다는 연구결과가 나왔다.

• Journal of dental hygiene science
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• v.11 no.4
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• pp.305-310
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• 2011

The purpose of this study was to investigate association between oral health related quality of life(OHRQoL) and health outcome, such as evaluated oral health state, perceived health state and perceived oral health state. 148 of individuals over 50 years old completed a self-reported questionnaire on Oral Health Impact Profile(OHIP-14) and oral examination was perfomed. 9.5% of respondents reported no problems or discomfort using OHIP-14. The most frequently reported problems were physical pain(69.8%) and psychological discomfort(63.5%). 43.9% of the individuals rated their health and oral health as poor and 54.7% were dissatisfied with their oral health. The study showed association between number of DMFT, missing teeth, perceived health state, perceived oral health state, oral health satisfaction and oral health related quality of life. Perceived heath sate was correlated with oral health related quality of life. But the study showed no association between DMFT, number of missing teeth and oral health related quality of life.

• Journal of dental hygiene science
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• v.14 no.3
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• pp.379-389
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• 2014

This study intended to examine the health status and quality of life among the elderly patients who stayed in geriatric hospitals for a long period of time. The study involved 222 elderly who were older than 65-year-old, an oral examination was conducted in 10 geriatric hospitals located in the metropolitan area and Chungcheong-do. Cross-tabulation, one-way ANOVA, t-test, and Stepwise multiple regression were performed for analysis. The average number of teeth among the subjects was 11.22 and that of dental caries was 1.17. Also, the average number of teeth mobility was 0.93 and halitosis was detected among 81.9%. Only 29.70% reported absence or a kind of systemic disease and 70.31% of the subjects was shown to have more than two kinds of complex disease. In addition, 87.8% of the subjects had depression and among them, 55.40% showed serious depression. The average score on quality of life was 2.62 points and as for the related factors, the number of remaining teeth and dental caries were counted along with care grade, hospitalization period, and age. According to such results, the oral health status among the elderly patients staying long in geriatric hospitals were not good in general; also they showed high level of systemic disease and depression and low quality of life.

• Journal of Dental Rehabilitation and Applied Science
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• v.26 no.2
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• pp.145-156
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• 2010

Loss of posterior support may cause overloading and excessive wear of remaining teeth. Moreover, the extrusion of antagonistic teeth leads to the destruction of the occlusal plane. The loss of vertical dimension of occlusion (VDO) also emerges clinically, which may bring the loss of esthetic appearance and function. These patients who suffer from the loss of posterior support, often require vigorous periodontal treatments (osteotomy, crown lengthening) and extensive oral rehabilitation. Sixty three years old female patient visited for the prosthetic treatment of the posterior edentulous area. She had no other systematic disease and parafuctional habits for prosthetic treatment. Intraoral and radiographic examinations were done. The evaluation of VDO and vertical dimension of rest position were evaluated for proper prosthetic procedures and diagnostic wax up was done. As a result of diagnosis, VDO was increased by 2 mm considering the loss of VDO and space for the prosthetic treatment. After the pretreatments, initial preparation of teeth and provisionalization were carried out. Six weeks later of provisionalizaion, final preparation and impression was performed. Using the duralay resin copings, jaw relation was registered. The master cast was mounted and definitive restoration was fabricated. After the evaluation of esthetic and function, pick up impression for clinical remounting was done. Lucia jig was made for new jaw relation and occlusal adjustment on the articulator. Definitive restoration was delivered and the patient was periodically recalled for additional occlusal adjustment. From this case, the satisfactory functional and esthetic results through full mouth rehabilitation with increase vertical dimension were achieved.

• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.4
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• pp.412-418
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• 2017

During orthodontic treatment, formation of white spot lesions (WSLs) around brackets has long been recognized as a potential risk. This study performed to investigate effect of preventing enamel demineralization and remineralization by application of fluoride-containing orthodontic primer. Fifty extracted bovine incisors teeth were randomly allocated to 3 groups: (I) Non-preparation specimens, (II) Application of Light Bond$^{TM}$ as fluoride containing orthodontic primer, (III) Application of Transbond$^{TM}$ XT Primer as traditional orthodontic primer without fluoride. Each group is demineralized under artificial carious solution. The demineralization pattern was evaluated using a Q-ray view, Vickers hardness test and polarized light microscope. The remained primer was calculated as 35 - 50%. The highest surface microhardness was shown on Light Bond$^{TM}$ surface. There were statistically significant differences in Vickers microhardness number between adjacent areas of Light Bond$^{TM}$ and non-prepared area. There was almost no demineralization of the enamel surface under the Light Bond$^{TM}$. At the adjacent site of Light Bond$^{TM}$, the shallow caries pattern and remineralization appearance were also observed. These results suggest that the use of fluoride-containing primers may be useful for bracket attachment to reduce enamel demineralization during orthodontic treatment.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.1
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• pp.102-107
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• 2009

In clinical pediatric dentistry, we have many chances to encounter the white spot like incipient enamel lesions on the mesial surfaces of the 1st molars with direct vision, especially just after the 2nd primary molars were exfoliated. But it was thought highly desirable to assess if these lesions are properly and effectively managed yet. This study aims at surveying the prevalence of incipient lesions on the mesial surfaces of the 1st molars in children through direct observation and examining the suitability of adhesive sealing on them as a pilot trial in searching for their proper management. 1. Among the 124 mesial surfaces of the 1st molars examined, 34% were sound, 53% had incipient carious lesions and 13% had cavitated lesions. 2. In the sectional views of the specimens, 20% showed microleakage after thermo-cycling and it was thought not recommendable as a permanent method. Therefore in order to effectively fight against the incipient caries lesions in children‘s permanent teeth, it was thought proper not to rely on any one method, but to perform reinforcing oral hygiene and promotion of remineralization in combination with therapeutic sealing which is stronger in short-term sealing effect. Although therapeutic sealing has been considered as the core in minimally invasive concept to treat the white spot lesions, its long-term clinical trials have not been suggested. Continuous research is strongly required for making this approach to acquire permanent nature, especially in regards of proper pretreatment and high molecular materials deeply penetrable into enamel.

• The Journal of Korean Academy of Prosthodontics
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• v.58 no.4
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• pp.342-348
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• 2020

Anatomical changes in the facial and alveolar bones occur after multiple teeth are extracted. In the maxilla, the alveolar bone is absorbed in the direction and inclination of the root, and the remaining alveolar bone becomes shorter, reducing the diameter of the arch. In addition, as the nasolabial angle increases, the support of the lips and the aesthetics of the face are lost. This case reports a functional and aesthetically satisfactory results of full mouth rehabilitation with the implant-supported fixed prosthesis using a zirconia framework.

• Journal of Dental Rehabilitation and Applied Science
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• v.32 no.4
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• pp.301-306
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• 2016

It is very hard for edentulous patients to satisfy retention and stability with their complete denture. Especially, for patients with systemic diseases such as Parkinson's disease causing involuntary and limited movements, fabricating complete dentures may be challenging to both dentists and patients due to functional limitations. To overcome this problem, overdentures can be used through conserving retained roots. In this case, a 45-year-old male patient had to extract numerous teeth due to dental caries, and at the time of visit he was taking drugs for diabetes and Parkinson's disease for a period of long time. A complete denture was applied to maxilla, and for mandible, an overdenture on two preserved retained roots was applied where its retention and stability were obtained by magnetic attachments. This case reports that overdenture with retained roots improved overall functional limitations.