• 대한치과보철학회지
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• 제55권2호
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• pp.198-204
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• 2017

악안면부의 결손은 선천적으로 결손을 가지고 있거나 외상이나 수술적인 절제 등에 의한 후천적 원인에 의해 발생할 수 있다. 특히 구강 내 결손을 가진 환자 중 상악의 결손과 연관되어 있는 경우가 높은 비중을 차지하고 있으며 보철적 치료의 필요성이 높다. 하악의 부분적 결손을 가질 경우 기능적 회복에 상당한 한계점을 보이나 양측 턱관절이 정상적으로 남아 있을 경우 국소의치를 이용한 악안면 보철물을 제작함으로써 양호한 결과를 기대할 수 있다. 본 증례의 환자는 58세 남자 환자로서 안면부 총상으로 인한 구개부 및 좌측 하악 구치부 결손을 가진 분으로 obturator와 하악 RPD 재제작을 위해 내원하였다. 환자의 상악 결손 범위는 Aramany 분류법 Class IV에 해당되는 상태이며, 하악은 Cantor와 Curtis 분류법 Type V resection 상태이다. 상, 하악의 우측 구치부가 잔존하였으나, 수술 후 악골 변형으로 인해 서로 교합되지 않았으며 치주상태 불량으로 인한 동요도도 존재하는 상태였다. Obturator의 유지를 위해 잔존 지대치를 최대한 활용하였고 안정적인 교합이 형성되도록 치아를 배열하였다. 하악 RPD는 하악 절제술로 변형된 연조직에 적합하도록 제한된 범위를 피개하는 RPD를 제작하였다. 이에 환자분의 저작, 연하, 발음 기능이 많이 개선되었으며 만족할 만한 결과를 보여주어 본 증례를 발표하는 바이다.

• 대한치과보철학회지
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• 제55권2호
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• pp.205-211
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• 2017

구치부 지지 상실은 대합치의 정출, 잔존 치아의 교모 등으로 교합평면의 부조화와 보철수복공간 부족을 야기할 수 있다. 이러한 환자는 수직교합고경 분석이 선행되어야 하며, 수직교합고경의 증가가 필요한 경우 적절한 임시 수복물 제작을 통해 기능적, 심미적 측면을 평가해야 한다. 최종 보철물 제작에 임시 수복물의 정보를 반영하는 방법으로 이중 스캔을 이용할 수 있다. 본 증례는 구치부 상실 및 대합치의 정출로 보철수복공간이 부족하나 수직교합고경의 감소가 미미한 환자에서 이중 스캔을 이용하여 수복하였다.

• 대한치과교정학회지
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• 제41권1호
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• pp.51-58
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• 2011

Objective: To evaluate the shear bond strength (SBS), fracture mode, wire pull out (WPO) resistance and microleakage between low-shrinking and conventional composites used as a lingual retainer adhesive. Methods: A total of 120 human mandibular incisor teeth, extracted for periodontal reasons, were collected. Sixty of them were separated into two groups. To determine the SBS, either Transbond-LR (3M-Unitek) or Silorane (3M-Espe) was applied to the lingual surface of the teeth by packing the material into standard cylindrical plastic matrices (Ultradent) to simulate the lingual retainer bonding area. To test WPO resistance, 20 samples were prepared for each composite where the wire was embedded in the composite materialand cured. Then tensile stress was applied until failure of the composite occurred. The remaining 60 teeth were divided into two groups and multi-stranded 0.0215-inch diameter wire was bonded with the same composites. Microleakage was evaluated by the dye penetration method. Statistical analyses were performed by Wilcoxon, Pearson chi-square, and Mann-Whitney-U tests at p < 0.05 level. Results: The SBS and WPO results were not statistically significant between the two groups. Significant differences were found between the groups in terms of fracture mode (p < 0.001). Greater percentages of the fractures showed mix type failure (85%) for Silorane and adhesive (60%) for Transbond-LR. Microleakage values were lower in low-shrinking composite than the control and this difference was found to be statistically significant (p < 0.001). Conclusions: Low-shrinking composite produced sufficient SBS, WPO and microleakage values on the etched enamel surfaces, when used as a lingual retainer composite.

• 치위생과학회지
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• 제18권1호
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• pp.1-8
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• 2018

Stroke is the second cause of death worldwide, although the survival period is increasing after the occurrence of stroke, severe physical disability is caused with aftereffect. Oral inflammation is not limited to the oral cavity, it can cause malignant changes in other tissues and organs. In previous studies, we confirmed the relationship between tooth loss and stroke due to periodontal inflammation. The purpose of this study was to investigate the relationship between oral health and stroke such as oral hygiene behavior, tooth loss and periodontal disease among Korean adults over 40 years of age. This study was analyzed using the 6th Korea National Health and Nutrition Examination Survey (KNHANES) data. A total of 3,389 adults over 40 years of age were analyzed as final subjects. Socioeconomic statuses and oral health status was analyzed using a complex sample analysis technique. Logistic regression was used to analyze the relationship of oral health and stroke, and 95% confidence intervals were computed using SPSS. When the prevalence of stroke according to oral hygiene behavior was checked, the prevalence of strokes was lower in subjects who had a lot of brushings per day and subjects who used oral hygiene products (p<0.05). The risk of stroke was 2.17 times (95% confidence interval, 1.43~3.28) higher in the group with less than 19 remaining teeth, but it was not statistically significant as a result of adjusting for age and sex, income level, education level, drinking and smoking (p>0.05). Loss of teeth was found to be associated with the risk factor of stroke. Therefore, loss of teeth due to periodontal disease is an additional issue that should be considered as a risk factor for stroke.

• 한국융합학회논문지
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• 제10권12호
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• pp.429-436
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• 2019

본 연구는 2013-2015년도 국민건강영양조사 원시자료를 이용하였고, 65세 이상 한국노인에서 발거가 필요한 치아와 관련된 요인을 파악하고자 다변량 로지스틱 회귀분석을 실시하였다(4.037명). 그 결과, 치아발거필요의 위험도가 남성에서 1.84배, 연령에서는 75세 이상 1.52배, 소득 하에서 2.36배, 소득 중은 2.04배, 흡연자에서 1.44배 높았고, 본인인지 구강건강상태가 나쁘다고 생각할수록 1.44배, 1년간 구강검진을 안함 1.49배, 1년간 치과진료 치료 안함이 2.30배로 높아 통계학적으로 유의하였다. 이를 통해 현재의 건강행태와 구강건강행태를 통해 발거필요치아와 관련된 위험요인의 근거를 강화할 수 있다고 생각되며, 향후 노인의 정기적인 구강검진과 구강보건교육 및 치과치료비의 경감을 통해 치과치료의 문턱을 낮출 수 있도록 국가적인 차원에서 다각적으로 모색해야 할 것으로 판단된다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권3호
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• pp.119-123
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• 2015

Objectives: Dentin is composed of many minerals and growth factors. Based on this composition, we studied its effect as a possible regenerative material for alveolar healing. Materials and Methods: This study was conducted using four 2.5-year-old mongrel dogs (male; weight, 25 to 30 kg). The third mandibular premolars were carefully mobilized with a dental elevator and then removed using forceps. The crown portions of the extracted teeth were removed with cutters, and the root portions of the remaining teeth were collectively trimmed as closely as possible to 350 to $500{\mu}m$. Dentin and cementum (DC) chips harvested from the extracted teeth were soaked in blood and packed into the fresh sockets (autograft). Biopsies were performed at the ends of day 14 and day 56 following implantation. Data were expressed as $mean{\pm}standard$ deviation and compared with t-test results. Results: The ratio of $S_A$(bone) to total area of each probe was determined and was $170{\pm}16{\mu}m^2$ for the control group and $71{\pm}14{\mu}m^2$ for the DC group, a significant difference (P <0.05). Conclusion: DC particulate grafts offered no improvement in bone regeneration in alveolar extraction sockets.

• 대한치과보철학회지
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• 제28권2호
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• pp.217-229
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• 1990

The Applegate-Kennedy classification, the drawing of removable partial denture design using color coding, the selective tissue placement impression method in case of Class I and Class II removable partial dentures, the design of the swing lock attachment of an alternative approach to conventional removable partial denture, the design of the intracoronal or extracoronal attachment, and the removable partial denture design using a rotational path were presented. The following conclusions from the above things were presented : 1. The swing lock attachment removable partial denture can be effective to an alternative approach when the design of conventional removable partial denture is improper with markedly mobile remaining teeth or missing key abutments. 2. Intracoronal or extracoronal attachments must be selected care-fully considering the conditions of the abutment teeth and alveolar ridge whether more occlusal loads to the abutment teeth or to the alveolar ridge are distributed. 3. It must be almost prerequisite that a functional impression is taken in case of Class I and class II removable partial dentures and in case of tooth-borne removable partial dentures, a removable partial denture using rotational path is strong, hygienic, esthetic, and can be accomplished successfully in the clinical aspect when it is properly designed and fabricated through the complete understanding of an indication and a principle. 4. All necessary informations must be achieved with carefully investigated surveying procedure according to each clinical case by Applegate-Kennedy classification which can be helpful and useful in the clinical application and it is important that dentists themselves must be in the habit of drawing a reasonable partial denture design using a color coding in the paper sheet.

• 대한치과보철학회지
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• 제52권3호
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• pp.252-257
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• 2014

완전 무치악 환자에서 전악 수복시 환자 고유의 악간관계, 교합평면의 위치, 구순지지, 치아형태와 교합양상을 알 수 없기 때문에 그 모든 것을 임시의치에 기록한 후 이것을 최대한 최종 보철물에 반영하여 이상적인 보철물을 제작해 주어야 한다. 본 증례의 환자는 치주질환에 의한 다수 치아 동요가 존재하여 예후가 불량한 잔존치아 전악 발거 후 임플란트 식립하여 임시치아에 환자의 수직 및 수평 악간관계, 교합평면의 위치, 수직 및 수평 피개의 양, 치아 크기, 전치부 길이를 기록하였다. 그 후 임시치아를 스캐너와 CAD/CAM 기술을 이용하는 double scanning technique로 복제하여 임시치아와 동일한 형태의 단일 구조 지르코니아 브릿지 보철물을 제작하였다. 치료 이후 4개월간의 임상 관찰에서 환자는 심미적, 기능적으로 만족하고 안정적으로 유지되었기에 이를 보고하고자 한다.

• 대한소아치과학회지
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• 제24권3호
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• pp.556-561
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• 1997

Intentional replantation of the posterior teeth has been performed as a last resort except extraction when it is impossible to perform the conventional endodontic or surgical endodontic treatment. Many studies have done with the prognosis, and root resorption, of which the responsibility might have been injury of periodontal ligament and remaining periodontal lesion, proved to be major cause of failure. Intentional replantation, however, can exclude anatomic difficulty, risk of nerve injury, and maxillary sinus trauma that surgical access can raise, especially in posterior teeth, and it is reported that success rate is not less than surgical endodontics, independent of replantation of traumatically avulsed teeth. The success of intentional replantation can be evaluated with, clinically, reduction of pocket depth, pain and mobility(physical mobility), and, radiographically, hard tissue formation, reduction of periapical radiolucency. In this case report, for the maxillary left first bicuspid with dens evaginatus that had periapical lesion, painfulness, mobility and showed no reduction of mobility after even extirpation and a number of irrigation, extraction followed by extraoral root filling with calcium hydroxide and replantation was performed. Based on many studies, it is concluded that hard tissue formation capacity of calcium hydroxide, preceded extirpation before extraction, and careful extraction without injuring periodontal ligament affected successful results of this case.

• 한국치위생학회지
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• 제10권6호
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• pp.983-990
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• 2010

Objectives : This study was to investigate the level of oral health, xerostomia, and oral health related activities of daily living(ADL) and the clinical factors influencing oral health related quality of life(OHIP-14) in elderly for visiting healthcare. Methods : Data were obtained from a cross-sectional survey of 106 elderly people(mean age=$77.5{\pm}4.98$). Participants in the study were recruited when they attended the public health center in Cheonan-si. Data were collected by means of a personal interview from July 19 through to August 20, 2010. Oral health related ADL, OHIP-14 and dry mouth was measured by the total 24-items. The data was analysed with t-test, one-way ANOVA, and multiple regression using the SPSS program. Results : Participants had a mean of 13.6 remaining natural teeth, which was significantly with age and perceived oral health. Xerostomia score achieved a mean of 6.39 out of a maximum 12 points. Powerful predictors of OHIP-14 were natural teeth, masticatory difficulty, oral pain, PHP index, perceived oral health, age and living together for the elderly Conclusions : Based on the findings, OHIP-14 has a significantly impact on oral health related ADL. These results suggest that elder people oral health promotion should be developed assessment index which was measured predictors related oral health in the elderly for visiting healthcare.