• 한국치위생학회지
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• 제12권2호
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• pp.409-417
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• 2012

Objectives : The purpose of this study is to figure out and establish the basic data that can help improve management of oral healthcare for the international marriage immigrant women. Methods : In this sense, we surveyed questions on 237 women out of 1,300 immigrant women, who have participated in the program by multi-cultural household supporting center, in a fashion of face-to-face investigation and on-the-spot direct cavity inspection simultaneously from May 1 to October 31, 2010. Collected data were electro-statistically computerized under SPSS 17.0 program and analyzed with frequency analysis, recurrence analysis and logistic regression analysis respectively. Results : The number of filled teeth got lower when they had lower number of dental visits. Women from the Philippines had the highest number of defect teeth, and the number of fixed prosthetic appliance became less when they had less number of dental visits. When they had no experience of oral health education, they had less fixed prosthetic appliances. There was higher percentage of periodontal disease when they did not have dental visit compared with the dental visit cases. Conclusions : Preparation of a policy for east Asian immigrant women for them to visit dentist comfortably and expansion of systematic oral health education are highly recommended.

• 한국치위생학회지
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• 제8권4호
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• pp.141-151
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• 2008

The purpose of this study was to examine the oral health awareness and oral health care of health-related and health-unrelated majors in an attempt to stress the importance of oral health education and boost the efficiency of oral health care. The subjects in this study were 363 college students. Out of the selected students, 174 were health-related majors, and 189 weren't. After a survey was conducted, the collected data were analyzed for the purpose of comparison, and the following findings were given: 1. Concerning daily mean toothbrushing frequency, the largest number of the male students who accounted for 55.2 percent brushed their teeth once a day on average, and the greatest number of the female students who represented 52.9 percent did that twice a day. As for the influence of their major, the largest group of the health-related majors who numbered 89(51.1%) brushed their teeth twice a day, and the greatest group of the health-unrelated majors who numbered 93(49.2%) did that once a day. The gaps between them were statistically significant(p<0.05). 2. As to the length of toothbrushing time by gender, it took more than two or three minutes for the largest groups of the male and female students that respectively numbered 96(76.8%) and 184(77.3%) to do toothbrushing(p<0.01). The greatest groups of the male and female students that respectively numbered 72(57.6%) and 183(76.9%) brushed their teeth after meals. 3. In regard to oral hygiene supplies, the largest groups of the health-related and health-unrelated majors that respectively numbered 78(44.8%) and 115(60.8%) had chewing gum and candy with them. As to the use of oral hygiene supplies, 99 health-related majors(56.9%) and 133 health-unrelated majors(70.4%) didn't put oral hygiene supplies to use. Thus, the use of oral hygiene supplies was statistically less common among the health-unrelated majors, and the gap between the two was significant(p<0.01). 4. As for health-related concern by gender, the largest group of the male students that numbered 56(44.8%) showed the most interest in preventing dental caries, and the greatest group of the female students that numbered 103(43.3%) were most concerned about tooth whitening. The gap between the male and female students was statistically significant(p<0.05), but the track of their major made no statistically significant difference to that. 5. Regarding the experience and awareness of scaling, the largest number of the students never got their teeth scaled regardless of gender and major, and the greatest group didn't care about scaling irrespective of gender and major, either, though they considered it advisable to do.

• 대한치과보철학회지
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• 제60권1호
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• pp.19-28
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• 2022

가철성 국소의치에서 지대치는 국소의치의 지지, 유지, 안정에 필수적으로, 기능적인 의치 제작의 중요한 요소이다. 치주적으로 건전한 지대치가 충분하고 양측으로 위치할 경우 기능적인 의치 제작이 용이 하겠지만, 지대치가 부족하거나 편측에 위치하는 경우에는 생역학적으로 불리하여 기능적인 의치를 만들기가 상대적으로 어렵다. 한편, 최근에는 임플란트 서베이드 크라운을 이용해 지지, 유지, 안정 세 요소를 보강하는 임플란트 지지 국소의치가 치료 계획으로 많이 선택되고 있다. 특히, 소수 잔존치만 남은 경우에 임플란트 서베이드 크라운을 추가함으로써 저작 능률, 심미, 환자의 편안감, 발음의 개선 등을 얻을 수 있다. 본 증례는 하악에 편측 소수 잔존 지대치를 갖는 환자에서 반대편 소구치부에 임플란트 서베이드 크라운을 추가하여 양측성 후방연장 국소의치를 제작하였다. 지대치의 비대칭성을 해소하였고, 환자와 술자 모두 만족하는 결과를 얻었기에 본 증례를 보고하는 바이다.

• 한국산학기술학회논문지
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• 제11권11호
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• pp.4354-4359
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• 2010

본 연구는 임플란트 시술선택에 따른 환자만족도에 영향을 미치는 요인을 연구하기위해, 2009년7월 1일부터 2009년 9월 12일까지 대구지역 치과 병. 의원에 (병원2곳, 의원5곳)내원하는 임플란트 시술환자를 대상으로 설문조사 한 145부를 SPSS12.0 프로그램으로 분석하였다. 그 결과 발치원인에 따른 임플란트 시술에 대한 만족도는 치아우식증, 치주질환의 원인으로 발치 후 임플란트 식립 시에는 보통이 많았고, 외상은 만족이 가장 많았다(P<0.05). 발치 원인 별로 발음 기능 만족은 보통이 가장 많았고(P<0.001), 이물감등의 기능적인 부분의 만족도는 치주질환이 원인인 경우 불만족이 가장 많았다(P<0.01). 병원선택 이유에 따른 병원환경 만족도는 의사명성을 보고 선택했을 때 만족이 많았고, 집근처로 가까워서 선택한 경우 불만족이 많았다(P<0.001). 임플란트 식립 개수에 따른 치과 내원 횟수 만족도는 식립 개수가 많을수록 불만족을 나타냈으며 (P<0.01), 치아 모양 및 색상 만족도 분석에서는 '1~2개'와 '6개 이상'에서 만족이 높게 나타났다(P<0.05). 따라서 환자의 임플란트 만족도를 높이기위해서는 각 개인의 구강상태, 요구도를 정확히 인지한 후 개인에 따른 시술기간, 내원횟수, 기능, 심미작인 예상만족도를 제시해 주는 것이 진료자와 환자 상호간의 신뢰도를 높이고 시술 후 만족도의 향상에 기여할 것으로 사료 된다.

• 한국치위생학회지
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• 제19권1호
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• pp.55-64
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• 2019

Objectives: The purpose of this study was to compare the differences in oral health-related quality of life among elderly people aged over 65 years, in terms of physical, mental and oral health status and to analyze factors affecting their oral health-related quality of life. Methods: From May 9 to June 23, 2017, we randomly visited aged-care community centers in the metropolitan area, and recruited 222 elderly, aged 65 or older. First, each participant completed a questionnaire consisting of 4 general items: 1 systematic disease, and 3 subjective oral conditions. Afterwards, the researchers interviewed the participants to assess their mental status, using MMSE-DS and recorded the responses. Finally, an oral examination was performed to determine the number of remaining teeth. The average oral health-related quality of life according to each characteristic was analyzed by t-test and ANOVA. Hierarchical multiple regression analysis and Pearson's correlation coefficient analysis were used to analyze the correlations between factors and the factors affecting oral health-related quality of life. Results: The mean oral health-related quality of life was 4.15. Participants with 20 or more remaining teeth demonstrated better oral health-related quality of life than those with 19 or less teeth. Higher oral health-related quality of life was also found among elderly without gingival bleeding, self-reported halitosis and dry mouth. In addition, positive correlation with the number of remaining teeth and negative correlation with gingival bleeding, self-reported halitosis and dry mouth, were noted. Finally, the results of the hierarchical multiple regression analysis indicated that remaining teeth, gingival bleeding, self-reported halitosis and education were influential factors in determining the oral health-related quality of life among the elderly. Conclusions: The results of this study confirmed the necessity of better policy support, and the importance of implementing delivered, elderly-centered oral health education program by professionals to prevent tooth loss and manage periodontal diseases.

• 대한소아치과학회지
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• 제41권4호
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• pp.298-305
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• 2014

본 연구의 목적은 3급 부정교합 환자에서 facemask 치료 시 bonded expander의 치아 피개 정도에 따라 facemask의 치료 효과를 비교하고, 구강 내 장치로서의 고정원 소실 정도를 평가하는 것이다. 초기 혼합치열기에 facemask 치료를 받은 18명의 환자를 대상으로, bonded expander의 피개 범위에 따라 제1군(4개 치아 피개, 9명)과 제2군(3개 치아 피개, 9명)으로 분류하였다. 치료 전과 후 측모두부방사선사진을 촬영하여 계측치를 비교하였다. Facemask 치료 후 두 군 모두 상악 전방이동 및 하악 후하방 회전의 골격적 효과가 관찰되었고, 두 군간에 유의한 차이는 없었다. 고정원 소실로서 두 군 모두 상악 구치의 근심이동이 관찰되었고, 제2군이 제1군에 비해 유의하게 큰 근심이동이 관찰되었다. 결론적으로 bonded expander의 치아 피개 범위에 따라 골격적 치료 효과에는 유의한 차이가 없었으나, 고정원으로서의 소실 정도에는 차이가 있었다.

• 대한치과기공학회지
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• 제34권3호
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• pp.291-302
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• 2012

Purpose: It is to survey old men's utilization status of dental clinic and temporary-binding dentures and then to provide basic data to make a program for manufacturing old men's dentures and their teeth health education. Methods: Random selection was made on old men living in Daejeon and Chungnam, and a survey was conducted from April 15 to May 20, 2011. 500 questionnaires were distributed and 420 questionnaires were collected. Using spss 18.0 program, final analysis was made on 363 questionnaires except for 57 questionnaires which had missing value or showed some doubts about the unreliability. Results: 1. With respect to number of natural teeth as per the age, the upper/lower jaws had meaningful differences (P<.001), which means that the older the person is, the smaller number of natural teeth is. In the meantime, there was no meaningful difference according to sex. 2. With respect to kind of prosthetics installed in a mouth as per the age, there was meaningful difference in the upper jaws (P<.05) but there was no meaningful difference in the lower jaws. It was found out that the older the persons are, the more they use removable dentures while the younger the persons are, the more they use fixed partial dentures. 3. With respect to mouth health condition recognized by oneself, it showed bad (44.4%) and good (10.3%),which means recognition as bad is greater, and the age when prosthetics were first used is dispersed variously from below 40 to over 70. 4. Dental care institutions which they mainly used are hospital and clinics (91.5%), and 66.4% of them visited dental clinics lately. Preferential treatment if they go to dentists is as follows in the order of prosthetics (33.9%), gum treatment (24.2%) and pain treatment (14.9%). 5. 68.4% of them revisited dentists after installation of dentures and the reason for revisit is as follows in the order of poorly fitted dentures (35.1%), painful gum 25.9%, regular check-up 25.4% and difficult chewing 9.6%. Conclusion: As our country enters into an aging society, mouth health problem of old men has come to a serious issue, and therefore, a survey was conducted on some old men with respect to their utilization status of dental clinic and removable dentures in order to provide basic data for improvement of quality of their life, maintenance and enhancement of their mouth health. The study result shows that the older they are, the higher the loss rate of teeth as well as needs for prosthetics are, and thus it is thought the study will help to develop mouth health education program which may improve quality of old men's life by recovery of mouth functions declined due to loss of teeth and by regular check-up, education for mouth health control and following-up control of dentures.

• Restorative Dentistry and Endodontics
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• 제38권4호
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• pp.222-226
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• 2013

Objectives: The aim of this study was to assess the influence of operator experience level on the lifespan of the WaveOne Primary file (Dentsply Maillefer, Ballaigues, Switzerland) in extracted teeth. Materials and Methods: Moderately curved canals of extracted maxillary and mandibular molars were randomly distributed into 2 groups: experienced and inexperienced operators. Ten files were allocated to each group (n = 10). Each canal was prepared until the working length was reached, and the same file was used to prepare additional canals until it separated. The number of canals prepared before file separation was recorded. The fragment length of each file was measured, and the location of the fragment in the canal was determined. Data were statistically analysed using the independent 2-sample t-test. Results: The 2 operators prepared a total of 324 moderately curved canals of maxillary and mandibular molars. There was no significant intergroup difference in the mean number of canals prepared (p = 0.27). The average lifespan of the WaveOne Primary file was 17.1 and 15.3 canals, and the longest lifespan was 25 and 20 canals, when used by experienced and inexperienced operators, respectively. There were no statistically significant intergroup differences in separated fragment length and location. Conclusions: Within the limitations of this study, operator experience level appears to have no effect on the lifespan of the WaveOne Primary file in preparation of moderately curved canals. Single teeth with multiple canals can be prepared safely even by a novice operator by using a single file.

• 대한치과보철학회지
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• 제32권2호
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• pp.235-248
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• 1994

There were many studies that distribute the partial edentulous states and examine the removable partial denture designs in the planning of removable partial denture treatment. This study was performed in the point of removable partial denture prescription to evaluate partial edentulism and its removable partial denture designs. The data was collected from the dental laboratory of each three dental colleges in Seoul and from two dental laboratories only for removable partial dentures as a prescription form. A total of 1411 cases with prescription form collected from dental laboratories were distributed for this study, then 788 cases were selected for this study. The case selection was done according to the contents of prescription form. The selected cases were divided into maxillary arch and mandibular and classified in terms of types of major connector and direct retainer, unbroken anterior teeth, Kennedy classification, the number of remaining teeth, and distribution of age and sex. The analyzed results were as follows : 1. The Kennedy classification I showed highest frequency both in maxilla and mandible. 2. The arch distribution of removable partial denture was 50.08% for maxilla and 49.92% for mandible. 3. The highest frequency in the distribution of direct retainer was the RPA clasp design. 4. The frequency of unbroken anterior 6 was 73.36% for maxilla and 82.30% for mandible. 5. The design of broad palatal strap and lingual bar revealed the highest prevalence in the major connector construction. 6. The mean number of remaining teeth per arch was 8.25 for maxilla and 8.37 for mandible. 7. The mean age of the patients supplied with removable partial denture was 52.25 years for men, 51.68 years for women, 52.11 years for maxilla, and 51.76 years for mandible and women showed more prevalence.

• Journal of Korean Dental Science
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• 제15권1호
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• pp.61-67
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• 2022

Purpose: This study aimed to evaluate the accuracy of bite registration using intraoral scanner based on data trimming strategy for fremitus teeth. Materials and Methods: A reference model was designed by Medit Model Builder software (MEDIT Corp., Seoul). Tooth number 24 and 25 were separated as dies and tooth number 26 was prepared for full-coverage crown. Those were printed using a 3D printer (NextDent 5100). The scanning procedure was performed by a single trained operator with one intraoral scanner (i700; MEDIT Corp.). The scanning groups were divided as follows: group 1 (G1), no fremitus; group 2 (G2), 0.5 mm buccal fremitus in the maxillary left first and second premolar; and group 3 (G3), 1.5 mm buccal fremitus in the maxillary left first and second premolar. Each group was scanned 10 times and were analyzed using the reference model data. Surface-based occlusal clearance was analyzed at the prepared tooth to evaluate accuracy. Result: Mean values of control group (G1) were 1.587±0.021 mm. G2 showed similar values to those from the control group (1.580±0.024 mm before trimming strategy and 1.588±0.052 mm after trimming strategy). G3 showed significantly greater values (1.627±0.025 mm before trimming strategy and 1.590±0.024 mm after trimming strategy) and the differences were found between trimming strategy (P=0.004). Conclusion: Bite trimming strategy for fremitus teeth is a reliable technique to reduce inaccuracies caused by the mobility at maximum intercuspation.