• Journal of Dental Rehabilitation and Applied Science
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• v.25 no.1
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• pp.41-52
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• 2009

The surface treatment of titanium implant could bring out the biochemical bonding between bone and implant. The purpose of this study was to evaluate the biomechanical bone response of Mg-ion implanted implants with plasma source ion implantation method. Twelve New Zealand white rabbits were included in this study. Each rabbit received one control fixture (blasted with resorbable blasting media, RBM) and three types of Mg ion implanted fixtures in tibiae. The implants were left in place for 6 weeks before the rabbits were sacrificed. Removal torque value and resonance frequency analysis (ISQ) were compared. The repeated measured analysis of variance was used with $P{\leq}0.05$ as level of statistical significance. ISQ was not different among all groups. However, the ISQ was increased after 6 weeks healing. The group had lowest ISQ value showed the greatest increment. Mg-1 implants with 9.4% retained ion dose showed significantly higher removal torque value than that of the other implants. From this results, it is concluded that the Mg-1 implants has stronger bone response than control RBM surface implant.

• Journal of dental hygiene science
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• v.8 no.4
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• pp.387-393
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• 2008

This study was undertaken to determine the halitosis status of urban area in Dae-Gu city. The sample of this study consisted of 332 persons who lived at Dae-Gu city. The results were as follows. 1. The persons consisted of 44.6% male and 55.4% female. The 32.5 % persons were under 38 years and 82.2% of persons were married. 2. The 26.8% persons answered the last meal time was before 1-2 hours and 63.3% persons answered middle halitosis. The 26.3% persons answered the time of worst halitosis was after breakfast and 33.1% persons answered the smell type of halitosis was nasty smell. The 11.4% persons experienced dental treatment for halitosis, and 63.9% persons required dental treatment for halitosis. 3. The 100 ppb~149 ppb concentration of halitosis was 156 persons. Over 150 ppb concentration of halitosis was 54 persons. The average of halitosis concentration was 122.76 ppb and, the 63.3% persons required halitosis management and treatment. An aged persons of the halitosis concentration was significantly increased than younger persons (p < 0.05). Higher smell preception of halitosis was significantly increased in halitosis concentration test practically (p < 0.001). Subjects who treated dental treatment for halitosis was significantly increased (p < 0.01). This study results have informed that the knowledge and management of halitosis was demand and required public relation for halitosis. The halitosis management and education program will improve the oral health. Therefore halitosis management program which based on data collection and planning will be developed and activated in further study.

• Journal of Veterinary Clinics
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• v.30 no.3
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• pp.214-217
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• 2013

A 3-year-old intact female hedgehog (Atelerix albiventris) was presented for evaluation of mandibular swelling. Fine needle aspiration of swollen mandibular was performed and smears were stained with Romanowsky type stain for cytological evaluation. Smears were highly cellular with predominance of variably shaped keratinized or non keratinized squamous cells with low numbers of spindloid to abnormally elongated cells. Cytologic impression was squamous cell carcinoma. The mass was surgically removed for histological examination. Microscopically tortuous and anastomosing delicate to broad pegs and nests of neoplastic squamous epithelial cells were supported by a moderate collagenous and spindloid fibroblast stroma. Tumor cells had moderate anisocytosis and mild anisokaryosis and range from moderately to well keratinized, with areas of intratumoral acantholysis accompanied by mixed stromal lymphoplasmacytic, neutrophilic inflammation. The mitotic index is 2-3 per high-power field. Tumor cells were expanding the subcutis subjacent to the layer of skeletal muscle and incorporating the osseous tissue fragments. The final diagnosis was squamous cell carcinoma. The patient survived three months after surgery without any further medical treatments.

• The Journal of the Korea Contents Association
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• v.13 no.7
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• pp.322-332
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• 2013

This study investigated the awareness and purchase status of the private dental insurance. Self-reported survey was conducted with patients over the age of twenties who visited dental institutions located in Seoul Metropolitan City and Gyeonggi Province. The demographic and health related characteristics of respondents were analyzed, and logistic regression was conducted to examine factors affecting the awareness and purchase of private dental insurance. Because only four years had been passed since the introduction of private dental insurance, the awareness and purchase rate was found to be low. However, the number of people considering subscription due to the economic burden of dental care service was relatively high. Factors affecting awareness were satisfaction of the national health insurance, purchase of private health insurance and private dental insurance, self-perceived dental health status, and smoking. The variables affecting purchase of dental insurance were age, awareness, purchase of private health insurance, smoking, number of visits to dental institution. Because qualitative and quantitative change would be made in the dental care utilization due to the rapidly growing dental insurance subscribers, further studies regarding the trend of purchase rate of private dental insurance and the effect of dental insurance on use of dental institution are needed.

• Restorative Dentistry and Endodontics
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• v.15 no.1
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• pp.57-66
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• 1990

The author conducted a dental survey of college girl students and compared with that of college students 20 years and 10 years ago which based on the same criteria. The items of this survey included the prevalence of dental caries, DMFT and the kinds of restored materials. College girl students 2,294 were examined in May 1988, with the recommended criteria and method of W.H.O.. Among them, the data of 2,243 were analyzed and compared with the data of 1968 and 1978. The following results were obtained : 1. The average number of present teeth was $28.86{\pm}1.65$, which does not show much difference when compared to $29.00{\pm}1.94$ of 1968 and $28.97{\pm}1.64$ of 1978. 2. The prevalence of dental caries was 86.22%, which increased in comparison to 83.25% of 1968 and 84.92% of 1978. 3. DMF index was 19.98, which considerably increased in comparison to 14.56 of 1968 and 15.51 of 1978. 4. The number of DMFT was $5.75{\pm}5.04$ per student. Compared to $4.23{\pm}3.88$ of 1968 and $4.49{\pm}3.69$ of 1978, there is a considerable increase. I) The average number of decayed(D) teeth was $1.14{\pm}1.63$, which decreased from $1.16{\pm}1.57$ of 1968 and $2.09{\pm}2.16$ of 1978. II) The average number of missing(M) teeth was $0.23{\pm}0.73$, which also decreased from $0.69{\pm}1.11$ of 1968 and $0.32{\pm}0.79$ of 1978. III) The average number of filled(F) teeth was $4.39{\pm}4.91$, which increased from $2.38{\pm}3.33$ of 1968 and $2.09{\pm}3.17$ of 1978. 5. According to the analysis of filling material, filling baby including amalgam, gold inlay, resin, silicate cement and paladium inlay was 90.5%, which increased in comparison to 72.8% of 1968 and 83.6% of 1978. Among them, amalgam occupied 62.93%, which showed the most increase. On the other hand, crown and bridge was 6.5%, 3.0%, respectively, which showed continuous decrease from 12.1%, 15.1% of 1968 and 8.7%, 7.7% of 1978. Therefore, the prosthodontic treatment reduced due to the decrease of tooth extraction. In contrast, there is continuous increase of conservative treatment which maintaining natural tooth.

• Journal of Periodontal and Implant Science
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• v.36 no.1
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• pp.179-194
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• 2006

목적 : 이번 연구에서는 일반인의 치주질환 치료제에 대한 인식도를 설문을 통하여 알아보았고 현재 국내에서 시판중인 치주질환, 치료제를 의약품 검색 사이트를 이용하여 조사하였다. 조사한 치료제의 효과를 해당 약품의 성분과 관련된 문헌을 고찰함으로써 알아보았다. 재료 및 방법 : 일반인의 치주질환 치료제에 대한 인지도를 조사하기 위하여 열 개의 문항으로 구성된 설문을 실시하였다. 설문은 한림대학교 성심병원 산업의학과에 정기 건강검진을 위하여 내원한 사람들을 대상으로 하였다. 보건복지부에 등록된 치주질환 치료제를 조사하기 위하여 킴스 온라인 홈페이지를 이용하였다. 의약품 종합 검색 페이지에서 '추가조건 입력하기'의 '복지부 분류'란에 '231. 치과-구강용약'의 조건을 주어 검색하였다. 검색 결과로부터 경구 치주질환 치료제를 구별하여 정리하였다. 치주질환 치료제와 관련된 문헌을 조사하기 위하여 미국 국립도서관의 검색 서비스인 Pubmed 홈페이지를 이용하였다. 검색어는 각 지료제의 성분명과 치은염, 치주염, 치주질환의 조합어를 사용하였다. 결과 : 설문에 참여한 사람은 100명이었다. 이 중 85%는 치주질환이라는 말을 들어본 적이 있었으며 72%는 자신의 치주건강상태가 좋지 않다고 생각하였다. 14%는 치주질환 치료제를 복용한 경험이 있었다. 61%는 치주질환 치료제에 관한 정보를 광고로부터 획득하였다. 향후 치주질환 치료제의 선택과 관련하여 35%는 치과의사에게, 24%는 의사에게 그리고 20%는 약사에게 문의하겠다고 대답하였다. 치주질환 치료제는 70개였다. 이 중 38개는 아스코르빈산 제제, 25개는 옥수수 불검화 추출물 제제, 5개는 저용량 독시싸이클린 제제였고 아보카도-콩 불검화물과 동양의학적 제제가 각각 한 개였다. 결론 : 치주질환 치료제에 대한 일반인의 인지도는 비교적 낮았으며 정보를 획득하는 주요 경로는 광고였다. 일반인들이 치주질환 치료제를 선택하는 데 치과의사는 큰 역할을 하지 못하였다. 시판중인 치주질환 치료제는 70개였다. 치료제는 다섯 개의 군으로 분류할 수 있었으며, 아스코르빈산 제제, 옥수수 불검화 추출물 및 저용량 독시싸이클린이 대부분이었고 아보카도-콩 불검화물과 동양의학적 제제는 각각 한 개였다. 옥수수 불검화 추출물과 저용량 독시싸이클린은 임상 연구에 의해 그 효과가 입증되었으나 아스코르빈산 제제는 임상 연구가 없었으며 따라서 이상적인 제제라고 할 수 있다. 기존의 문헌에 기초하여 볼 때 옥수수 불검화 추출물과 저용량 독시싸이클린만이 전통적인 치주질환 치료법(SRP)과 병행하여 치료제로 사용될 수 있다.

• Journal of Dental Rehabilitation and Applied Science
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• v.31 no.3
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• pp.178-185
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• 2015

Purpose: The purpose of this study was to conduct a comparative assessment on the satisfaction level for the two interfaces of surgical guide system (SimPlant and R2GATE), the design and convenience of manufactured surgical guides and the importance of using the surgical guides thereof by means of survey. Materials and Methods: Hereupon, they simulated the implant surgical process by mounting the two manufactured systems of surgical guide on a dental mold, respectively. The study subjects were instructed to complete the questionnaire as to the satisfaction level upon completion of the simulated surgery. This study summarized the data of each question after collecting the completed questionnaires. Then, this study analyzed the summarized data by utilizing statistical program SPSS 20.0 (IBM). Results: R2GATE had a higher value of the satisfaction level on the design and convenience of manufactures surgical guides. R2GATE group ($7.33{\pm}1.26$) was found to have a higher value in terms of the overall satisfaction level compared to SimPlant group ($6.67{\pm}1.26$) (${\alpha}$ = 0.05). Conclusion: The user satisfaction level on the surgical guide manufactured for R2GATE system was to such an extent as it can be widely used in clinical environment. Moreover, the surgical guide manufactured as R2GATE system can guide both the length and direction of a drill simultaneously. As a result, it is highly recommended for those beginners who do not have a lot of experience in implant placement.

• Sleep Medicine and Psychophysiology
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• v.12 no.1
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• pp.64-67
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• 2005

Obstructive sleep apnea syndrome(OSAS) is a common disease in the field of otorhinolaryngology and is characterized by repeated upper airway occlusions occurring during sleep. OSAS can occur due to various etiologies of the nasal, oral, pharyngeal and laryngeal airway in adults. Nasal obstruction can be caused by septal deviation, nasal polyps, concha bullosa, choanal atresia, neoplasms, foreign body, postoperative/post-traumatic synechiae, various rhinitis and so on. There are various kinds of surgical treatment of OSAS including nasal surgery, LAUP, UPPP, surgery of tongue base, tracheostomy and so on, but the effect of nasal surgery on snoring and OSAS is controversial. The authors report the case of a patient who had experienced nasal obstruction, moderate snoring and OSAS and who improved after septoplasty and turbinoplasty.

• Journal of Oral Medicine and Pain
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• v.36 no.3
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• pp.161-167
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• 2011

Sialolith is one of the most common pathologic conditions found in the salivary glands. The mechanisms responsible for the formation of sialoliths have not been elucidated so far. In this article, the chemical composition and micromorphology of a sialolith of a 58-year old female patient suffering from chronic sialoadenitis of the submandibular gland was analyzed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). In a SEM evaluation, the highly mineralized amorphous core surrounded by lamellar and concentric structures was revealed, however no foreign body, organic material, or signs of microorganism were observed in the core of the sialolith. EDX analysis showed the central core was composed of only Ca, O and P, and that a high level of C was detected near the central area as well. These results indicated that the inorganic composition of the sialolith was hydroxyapatite crystals, and that inorganic and organic substances existed around the central cores. This study suggests that the sialolith was composed mainly of hydroxyapatite crystals and the formation of the nucleus of the sialolith in the submandibular gland duct was secondary to sialadenitis, which favors the growth of an inorganic crystalline nucleus.

• Journal of Oral Medicine and Pain
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• v.36 no.3
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• pp.177-185
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• 2011

Aims: The purpose of this study was to evaluate the relationship between temporomandibular joint pain and the relative signal intensity (RSI) of retrodiscal tissue on T1-, and T2-weighted MRI images. Materials and Methods: This study was based on 122 TMJs of 61 patients who complain of TMJ pain in only one side but were revealed to have disc displacement in both TMJs according to MRI findings. The signal intensities of regions of interest (ROIs) in retrodiscal tissues were measured using T1-, and T2-weighted MRI images. The RSIs of retrodiscal tissues were referenced to the signal intensities of the ROIs of brain gray matter. The relationships between the RSI of retrodiscal tissue and joint pain, joint effusion, condylar degenerative change, and degree of disc displacement were examined. In addition, the relationships between joint pain and joint effusion, condylar degenerative change, and degree of disc displacement were examined. Results: On T1-weighted MR images, the painful TMJs showed significantly higher retrodiscal tissue RSI than non-painful TMJs. In addition, there is an association between joint pain and the degree of disc displacement. However, on T2-weighted MR images, the RSIs of retrodiscal tissues didn't show any significant differences with regard to joint pain, joint effusion, condylar degenerative change, and degree of disc displacement. Conclusions: The signal intensity of retrodiscal tissue can be used as a diagnostic marker for painful TMJ. However, the overall results suggest the signal intensity of retrodiscal tissue has a limited diagnostic significance in determining the pathologic status of TMJ.