• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.403-414
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• 2018

본 연구는 치아미백에 대한 지식과 만족도를 알아보고자 하는 것이다. 2017년 6월1일부터 2주 동안 울산광역시에 위치한 치과의원에 방문한 환자 328명을 대상으로 자기기입식 설문 조사를 실시하였다. 연구결과 치아미백 지식수준에 따른 치아미백만족도는 통계적으로 유의하지 않았으며, 치아미백지식수준이 상(8-10)인 경우 만족도가 3.86으로 가장 높았으며 하(0-3)인 경우 만족도가 3.00으로 가장 낮았다. 일반적인 특성에 따른 치아미백 만족도는 성별과 연령에서 통계적으로 유의하게(p<0.05) 나타났으며, 여자의 만족도가 3.74로 남자의 만족도 3.11 보다 높았다. 미백경험방법과 미백동기에 따른 만족도는 통계적으로 유의하였으며(p<0.05), 전문가 미백(4.41)이 OCT미백(2.64)보다 높았다. 또한 병원의 권유로 미백을 한 경우 4.13점으로 매체광고를 통해 미백을 경험한 경우(3.00) 보다 높았다. 따라서 치아미백의 만족도는 대상자의 일반적인 특성 뿐만 아니라 치아미백에 관한 지식수준, 치아미백 방법과 치아미백 동기에 영향을 받았다. 이러한 요인을 활용하여 치아미백의 경험과 만족도를 향상시키기 위한 치료계획을 세우는데 유용하게 사용될 수 있을 것이다.

• Restorative Dentistry and Endodontics
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• 제38권4호
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• pp.194-203
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• 2013

Objectives: To investigate the effect of enamel matrix derivative (EMD) on periodontal healing of replanted teeth in animal models. Materials and Methods: The authors searched MEDLINE, PubMed, EMBASE, Cochrane Library, Web of Knowledge and Scopus for articles published up to Oct 2012. Animal studies in which EMD was applied in transplanted or replanted teeth with adequate controls and histological data were considered. Normal periodontal healing or root resorption determined by histology after EMD was applied in replanted teeth with adequate controls was used as outcome measures. The following search strategy was used: ('Emdogain' OR 'enamel matrix proteins' OR 'enamel matrix derivative') AND ('avulsion' OR 'transplantion' OR 'autotransplantation' OR 'replantation'). Results: Six animal studies were included in the final review. There was great heterogeneity in study design among included studies. Two studies with similar study designs were identified and analyzed by a meta-analysis. The pooled estimates showed a significantly higher normal healing and surface resorption and significantly less inflammatory and replacement resorption in EMD-treated groups compared with non-EMD-treated groups. Conclusions: With the limitations of this systematic review, the use of EMD led to greater normal periodontal healing and surface root resorption and less inflammatory and replacement root resorption in the presence of periodontal ligaments. However, no definite conclusion could be drawn with regard to the effect of EMD on periodontal healing and root resorption when no periodontal ligaments exist.

• Journal of Periodontal and Implant Science
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• 제52권1호
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• pp.65-76
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• 2022

Purpose: The present study measured changes in arteriolar and venular capillary flow and structure in the gingival tissues during the development of plaque-induced gingival inflammation by combining dynamic optical coherence tomography (OCT), laser perfusion, and capillaroscopic video imaging. Methods: Gingival inflammation was induced in 21 healthy volunteers over a 3-week period. Gingival blood flow and capillary morphology were measured by dynamic OCT, laser perfusion imaging, and capillaroscopy, including a baseline assessment of capillary glycocalyx thickness. Venular capillary flow was estimated by analysis of the perfusion images and mean blood velocity/acceleration in the capillaroscopic images. Readings were recorded at baseline and weekly over the 3 weeks of plaque accumulation and 2 weeks after brushing was resumed. Results: Perfusion imaging demonstrated a significant reduction of gingival blood flow after 1 and 2 weeks of plaque accumulation (P<0.05), but by 3 weeks of plaque accumulation there was a more mixed picture, with reduced flow in some participants and increased flow in others. Participants with reduced flux at 3 weeks also demonstrated venular-type flow as determined by perfusion images and evidence of the development of venular capillaries as assessed by the velocity/acceleration ratio in capillaroscopic images. After brushing resumed, these venular capillaries were broken down and replaced by arteriolar capillaries. Conclusions: After 3 weeks of plaque accumulation, there was wide variation in microvascular reactions between the participants. Reduced capillary flow was associated with the development of venular capillaries in some individuals. This is noteworthy, as an early increase in venous capillaries is a key vascular feature of cardiovascular disease, psoriasis, Sjögren syndrome, and rheumatoid arthritis-diseases with a significant association with the development of severe gingival inflammation, which leads to periodontitis. Future investigations of microvascular changes in gingival inflammation might benefit from accurate capillary flow velocity measurements to assess the development of venular capillaries.

• Restorative Dentistry and Endodontics
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• 제47권1호
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• pp.10.1-10.11
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• 2022

Objectives: This study aimed to investigate the color stability, solubility, and surface characteristics of 3 calcium silicate-based cements (CSCs) after immersion in different solutions. Materials and Methods: ProRoot white mineral trioxide aggregate (MTA), Biodentine, and Endosequence Root Repair Material (ERRM) were placed in cylindrical molds and stored at 37℃ for 24 hours. Each specimen was immersed in distilled water, 5% sodium hypochlorite (NaOCl), 2% chlorhexidine, or 0.1% octenidine hydrochloride (OCT) for 24 hours. Color changes were measured with a spectrophotometer. Solubility was determined using an analytical balance with 10^-5 g accuracy. The surface characteristics were analyzed using scanning electron microscopy and energy-dispersive spectroscopy. Data were analyzed using 2-way analysis of variance, the Tukey test, and the paired t-test. Results: MTA exhibited significant discoloration in contact with NaOCl (p < 0.05). White precipitation occurred on the surfaces of Biodentine and ERRM after contact with the solutions, and none of the materials presented dark brown discoloration. All materials showed significant solubility after immersion in the solutions (p < 0.05), irrespective of the solution type (p > 0.05). The surface topography and elemental composition of the samples showed different patterns of crystal formation and precipitation depending on the solution type. Conclusions: All materials presented some amount of solubility and showed crystal precipitation after contact with the solutions. Biodentine and ERRM are suitable alternatives to ProRoot MTA as they do not exhibit discoloration. The use of OCT can be considered safe for CSCs.

• 한국융합학회논문지
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• 제8권12호
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• pp.159-165
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• 2017

본 연구는 노인의 의치보철 사후관리와 관련하여 의치관리 교육이해에 따른 의치관리실태의 차이를 확인하고자 2016년 10월 15일부터 12월 15일까지 대구지역의 65세 이상 의치 장착자를 대상으로 구조화된 설문지를 이용한 직접면담조사를 실시하였다. 그 결과 일반적 특성에 따른 의치관리 교육이해는 연령, 교육 수준, 의치제작비용충당, 주관적 건강상태, 의치 위치, 상 하악 의치착용년수, 치과관리방문횟수, 구취 정도가 통계적으로 유의한 차이가 있었다(p<0.05). 의치관리 교육이해을 종속변수로 유의한 영향을 미치는 독립변수는 의치제작비용충당, 주관적 건강상태, 구취 정도가 부(-)적 영향을 주었고, 의치 위치가 정(+)적 영향을 주었다. 따라서 의치 장착의 사후관리에 있어서 노인의 특성을 고려한 지속적인 관리교육이 필요할 것으로 사료되며, 향후 공통된 관리교육 매뉴얼이 마련될 수 있도록 해야 할 것이다.

• 대한치과기공학회지
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• 제13권1호
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• pp.37-51
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• 1991

In order to evaluate health status of dental technicians as an individual and a group, this study was conducted with Todai Health Index Questionaire on randomly sampled 277 persons(236 males and 41 females) from Aug. 20 to Oct. 6, in 1990 obtained Following conclusions were drawn. 1. Age composition of the subjects was 136 males(57.6%) in the age of 20$\sim$29 and 28 females(68.3%) in the age of 20$\sim$24. As for working places, 215 males(91.1%) and 38 females (92.7%) were working for dental laboratories and rest of them were at clinics and hospitals. In working years, male technicians who have been working for 5$\sim$10 years amounted to 80 (33.8%) and 12 females(29.3%) were working for 1$\sim$3years. 2. Responses to psychosomatic subjective symptom complaints rated as the highest in multiple subjective symptom(males : 40.00%, females : 41.98%) and those in physical items and mental irritability(male : 24%, female : 25%) and in mental items came next in order. The rate of complaint in depression was higher in female group than in male group (p<0.05). 3. Resonses to psychosomatic subjective symptom complaints in male group were high in the age of 20$\sim$29 and in the age of 20$\sim$24 in female group. The rates of complaint were higher in multiple subjective symptom, respiratory, eye and skin(p<0.05) and digestives(p<0.01) complaints. 4. Responses to psychosomatic subjective symptom complaints were higher among persons working at dental laboratories than at other working places : dental clinics and hospitals in all the items except for respiratory, depression and aggressiveness. Rates of complaints in eye and skin showed significant difference between working places(p<0.05). 5. Those who are engaged in polishing part tended to complain more about psychosomatic subjective symptoms. 6. The higher the level of education is the more they complained the psychosomatic subjective symptoms both in male and female group. In the difference of complaint respones, male group showed high rates of complaint in depression and female group in aggressiveness(p<0.05). 7. Responses to psychosomatic complaints by the length of working service were moderate in males who were working less than 10 years, and they decreased after 10 years of service. Females showed the highest response rate in the group of 3$\sim$5 years service and the lowest response in the group of 5 years service. Male complained more in aggressiveness and female in respiratory and aggressiveness(p<0.05). 8. Responses to psychosomatic subjective symptom complaint varied according to working hours of a day both in male and female group, showing high complaint rates in multiple subjective symptom, respiratory, eye and skin, mouth and anus, digestive, mental irritability and irregular life in male group(p<0.05).

• 치위생과학회지
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• 제9권4호
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• pp.369-374
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• 2009

본 연구는 군인들의 구강건강에 관한 실천과 태도 및 스트레스 수준을 조사하고 상호연관성을 파악하여 군인의 구강건강 수준 향상을 위한 기초자료를 제공하고자 2008년 6월 11일부터 8월 10일까지 충청북도 G군에 위치한 군부대 군인들을 대상으로 자기기입식으로 응답한 144부 설문지를 분석 자료로 사용하였으며, SPSS WIN 17.0 프로그램을 이용하여 분석한 결과 다음과 같은 결론을 얻었다. 1. 연구대상자의 스트레스는 전체평균 9점 만점에서 3.55로 전반적으로 스트레스 정도는 낮은 것으로 조사되었으며, '장래에 대한 문제'가 평균 5.50으로 가장 높게 나타났고, 부모님과의 갈등이 2.17로 가장 낮은 것으로 조사되었다. 2. 일반적인 특성에 따른 구강건강실천 및 태도에서는 학력이 높을수록 구강건강실천 정도가 높은 것으로 조사되었으며, 흡연을 하지 않을 경우가 흡연을 하는 경우보다 구강건강실천 정도가 높은 것으로 조사되어 통계적으로 유의한 차이를 보였다. 3. 군인들의 스트레스가 구강건강실천 및 태도에 미치는 영향력을 살펴본 결과 구강건강태도에 영향을 미치는 스트레스 변인으로는 '학업 및 직장', '성에 대한 문제'가 영향을 미치는 변인으로 조사되었으며, 구강건강실천에 양향을 미치는 스트레스 변인으로는 '외모에 대한 불만', '성격에 대한 불만', '부모님과의 갈등', '성에 대한 문제'가 영향요인으로 조사되었다.

• 치위생과학회지
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• 제3권1호
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• pp.23-31
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• 2003

본 연구에서는 이천시에 소재하는 고등학교 3학년 학생들의 구강보건의식행태를 조사, 연구하여 학교구강보건사업 및 교육의 방향과 목표설정에 있어 기초자료로 활용하고자 2002년도 9월 23일부터 10월 5일에 걸쳐 설문조사한 결과 다음과 같은 결론을 얻었다. 1. 하루에 잇솔질을 1~2회 하는 학생이 85.0%로 대부분을 차지하였고 1일 3회 잇솔질을 하는 학생은 여학생이 남학생보다 조금 많았다. 2. 치아우식증을 경험한 학생은 전체 77%였고, 치주질환이 있는 학생은 38.0% 대부분의 학생들이 치주질환 보다 치아우식증에 이환되어 있는 것을 알 수 있었다. 3. 충치나 잇몸질환이 있는데도 병원에 갈 시간이 없어서 병원에 가지 않는 학생이 가장 많았고 치과치료 경험이 있는 학생은 84.0%로 대부분의 학생이 치과치료경험이 있음을 알 수 있었다. 4. 치아건강에 대해 관심이 있는 학생이 46.8%로 남학생이 여학생보다 관심이 더 많았으며 통계적으로도 유의미하였다(p<0.05). 5. 구강건강에 대한 중요성 및 정보를 TV나 라디오 등 대중매체와 가족 또는 주위사람들에게서 주로 듣고 있었으며 대부분의 학생이 정기적인 구강검진을 받고 있지 않았음을 알 수 있었다. 6. 구강건강 향상을 위해 학교에서 구강보건교육을 받은 적이 없는 학생이 80.8%로 대부분을 차지하였고, 구강보건교육이 필요하다고 인식하는 학생이 76.2%로 성별에 따른 차이는 없었다. 7. 구강보건교육이 필요한 이유로는 대부분의 학생이 충치나 잇몸질환을 미리 예방할 수 있기 때문이라고 생각하고 있었고, 성별에 따른 차이 없이 구강보건교육에 대한 참여 의향이 있는 학생이 그렇지 않은 학생보다 더 많음을 알 수 있었다. 8. 구강건강유지에 있어서 잇솔질이 중요하다고 인식하는 학생이 69.3%로 가장 많았고 성별에 따른 차이는 없었다. 학생들은 정기적인 치과검진과 올바른 잇솔질방법, 불소가 함유된 치약을 사용하는 것이 충치예방에 효과적이라는 것을 대부분 모르고 있었다. 9. 구강보건지식정도를 살펴 본 결과 학생들의 지식이 낮은 것으로 나타났으며 성별에 따른 차이가 없음을 알 수 있었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제36권3호
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• pp.186-196
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• 2010

Introduction: The first aim of this study was to isolate the dental tissue-derived stem cells from the dental follicle (DF), dental pulp (DP), and root apical papilla (RAP) of the extracted wisdom teeth. Second was to evaluate their characterization with the expressions of transcription factors and cell surface markers. Finally, their ability of the in vitro multi-lineage differentiations into osteogenic and adipogenic cells were compared, respectively. Materials and Methods: Dental tissues, including dental follicle, dental pulp, and root apical papilla, were separated in the extracted wisdom teeth. These three dental tissues were cultured in Dulbecco’s modified Eagle’s medium (DMEM) with supplements, respectively. After passage 3, the homogeneous shaped dental tissue-derived cells were analyzed the expression of transcription factors (Oct-4, Nanog and Sox-2) and cell surface markers (CD44, CD90 and CD105) with reverse transcription polymerase chain reaction (RT-PCR) and fluorescence-activated cell sorting (FACS) analysis. In order to evaluate in vitro multi-lineage differentiations, the culture media were changed to the osteogenic and adipogenic induction mediums when the dental tissue-derived cells reached to passage 3. The characteristics of these three dental tissue-derived cells were compared with immunohistochemistry. Results: During primary culture, heterogenous and colony formatted dental tissue-derived cells were observed in the culture plates. After passage 2 or 3, homogenous spindle-like cells were observed in all culture plates. Transcription factors and mesenchymal stem cell markers were positively observed in all three types of dental tissue-derived cells. However, the quantity of expressed transcription factors was most large in RAP-derived cells. In all three types of dental tissue-derived cells, osteogenic and adipogenic differentiations were observed after treatment of specific induction media. In vitro adipogenic differentiation was similar among these three types of cells. In vitro osteogenic differentiation was most strongly and frequently observed in the RAP-derived cells, whereas rarely osteogenic differentiation was observed in the DP-derived cells. Conclusion: These findings suggest that three types of human dental tissue-derived cells from extracted wisdom teeth were multipotent mesenchymal stem cells, have the properties of multi-lineage differentiations. Especially, stem cells from root apical papilla (SCAP) have much advantage in osteogenic differentiation, whereas dental follicle cells (DFCs) have a characteristic of easy adipogenic differentiation.

• 대한치과기공학회지
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• 제31권1호
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• pp.37-54
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• 2009

The purpose of this thesis is to address the imbalance between supply and demand of dental lab technicians and to propose its solutions by analyzing the improvement of employment rate of graduates of dental technology schools in Daegu area and the supply and demand of the technician workforce. Preliminary and full-scale surveys were performed from Aug. 10 to Oct. 10 in 2008 on 150 junior students of dental technology schools who finished their on-the-job-training and 150 dental technicians who were working for dental laboratory in Daegu by self-assessment questionnaire. Followings are the findings of this study. First, regarding the gender of the dental technicians, 32.7% of respondents were female 67.3% were male. Concerning age, respondents younger than 29 years-old occupied the highest percentage(39.3%). With respect to the lab technology school they graduated, DaeguHealthCollege took the largest proportion of 87.3%. With regard to interpersonal relationship at the school, 58.0% of respondents felt their relationship 'smooth'. Second, about the motive of choosing to be a lab technician, the biggest proportion of the respondents(34.7%) replied that 'because it is professional'. Regarding the degree of satisfaction about the profession, 'so-so' was the answer with the biggest percentage(51.3%) followed by 'satisfied'(32.0%) and 'unsatisfied'(16.7%). It showed that respondents were generally satisfied with their major. Third, regarding relevance of on-the-job-training with 'preparation for the employment', highest percentage of both students and lab technicians(50.0%) replied 'so-so'. With respect to 'necessity of practical education', highest percentage of the students and lab technicians replied 'relating didactic education in college to the real world' with 52.7% and 40.7% respectively. With regard to 'the aim of on-the-sport-training', 'practical training of didactic education' was chosen by 54.0% and 47.3% respectively. Fourth, with regard to the 'types of college education advantageous for the employment', both students and lab technicians groups chose 'practical training' with the highest percentage. Concerning 'helpfulness of clinical training on employment', students answered 'so-so' and 'helpful' by 50.0% and 42.7% respectively and dental technicians replied similarly by 50.0% and 46.0% respectively. Fifth, with regard to the influence of financial factors on the supply and demand of dental technician(question #1), 68.0% of respondents agreed that 'salary plays key role in the supply and demand of the work force'. Concerning the question about working condition, respondents requested better working environment. With reference to interpersonal relationship at the laboratory, respondents replied that interpersonal relationship affects the duration of the employment it was found out that there were many conflicts with colleagues or dental office. Sixth, regarding the satisfaction about their profession according to the characteristics of the respondents more respondents were 'satisfied'(10.30 points) with their profession and 'unsatisfied' were 9.47 points and the difference was statistically significant(p<0.05). According to the findings of this study, practical education on campus and on-the-job-training are as important as didactic education at class due to the characteristics of dental technology major. It was found that more practical training is related to higher employment rate. Therefore, efficiency of on-the-job-training by college education should be increased raise employment rate of the graduates and reduce the unemployment. Up-to-date information needs to be promptly delivered and future vision should be presented to the students to raise their satisfaction about the profession. In addition, to reduce dental technician's frequent change of their workplace after facing with the reality of the profession after graduation, related organizations should make an effort to present better future than now.