• Journal of Technologic Dentistry
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• v.40 no.3
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• pp.173-180
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• 2018

Purpose: The purpose of this study was to verify the remake rate and cause of dental prosthesis and to investigate major factors of remake of dental prosthesis. Methods: This study carried out self-administered questionnaire survey from 126 nationwide dental laboratory CEO and directors, which was conducted from September to October in 2016. Results: Total remake rate of dental prosthesis was 10.1% at the nationwide dental laboratories. It was in order of remake rate of dental prosthesis 11.8% for CAD/CAM, 11.5% for porcelain and 11.0% for implant prosthesis. Error of clinical impression was the highest remake cause(63.7%). Nevertheless, dental laboratory take the responsibility of expense for remake of dental prosthesis, regardless of remake cause(67.4%). There was no relation between dental laboratory characteristics and the remake rate of dental prosthesis(p>.05). Conclusion : The remake rate of dental prostheses should be reduced to minimize the economic loss of dental laboratories and raise dental prosthesis satisfaction. It is required to communicate of dentist, dental technicians, and patients, moreover, undistorted information about oral environment should be provided to the dental technicians.

• Journal of Korean society of Dental Hygiene
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• v.7 no.1
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• pp.15-30
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• 2007

The main objective of this study is to investigate the improvement of the quality of dental health based on the dental service satisfaction factors of the old dental prosthesis patients of more than 60 years of age who use the dental institutes including dental hospital, clinic, and public health center and to identify the interest in the dental prosthesis as changing paint. Across the country through a questionnaire survey of a question and answer type conducted by the trained dental hygienists or dentist's. Major results of the empirical analysis are as follows. 1. looking at variation of the variables of socio-demographic features of the respondents, the group of female, age distribution of 60-65, average monthly income of 0.5-1 million Won, and schooling background of college showed significant difference. And the prosthesis treatment in terms of the purpose of isiting a dental institute, and the dental clinic in terms of the type of visiting dental institute showed a remarkably significant difference. 2. looking at variation of variables of the general features of the respondents, a prosthesis satisfaction service in terms of age showed significant difference: a prosthesis satisfaction service, dental staffs' service and dental facilities' service in terms of average monthly income showed significant difference: the entire conditions except for the dental facilities' service in terms of schooling and general features showed significant difference: and in terms of the purpose of visiting dental institute, it showed no significant difference. In terms of a visiting dental institute, the prosthesis satisfaction service, dental facilities, overall level of satisfaction, result of treatment, word of mouth and revisit showed significant difference. 3. looking at variation of the variables of post-installation prosthesis satisfaction of the respondents, the prosthesis satisfaction service, dentist's dental service, staffs' service, dental facilities' service and revisit in terms of the prosthesis type: and the prosthesis satisfaction service, word of mouth, revisit and overall level of satisfaction from the perspective of serious concern showed significant difference. The prosthesis satisfaction service and dentist's service in terms of the solving the economic burden: and the entire variables in terms of dissatisfaction elements showed a similar level of significant difference 4. in regard to the satisfaction of dental service and the change of the recognition of prosthesis patients, it was revealed that the level of dental prosthesis satisfaction of the respondents was closely related to the dentist's service, staffs' service, and dental facilities' service. Finally, looking at the influence of the dental service on the treatment result, satisfaction, word of mouth, revisit and the overall satisfaction level, it was revealed that they had a great impact on the prosthesis satisfaction service.

• Journal of Technologic Dentistry
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• v.29 no.2
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• pp.105-117
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• 2007

As a dental technician, the aim of the present study on maxillofacial prosthesis was to research its relation with dental technology and further development aspects by looking into its history, kinds, production materials and process. Dental technicians are to expect a great potential to work as maxillofacial prosthetist if having an interest in education of maxillofacial prosthesis field, and developing and operating the education process by expanding the range of dental technology. This article is to present overall history of maxillofacial prosthesis and some background information on the materials which have been used from the past. The maxillofacial field plays essential functions of mastication and speech, as well as performs appearance, which evokes good or bad feelings as an instant and instinctive response. The use of maxillofacial prostheses is not merely the replacement of a missing part of the face, resulted from injuries, but a rehabilitation process to help individuals come back to society. Rehabilitation includes both patient's physical and psychological recovery, such as self-esteem and selfconfidence. There has been a rapid development in application potentials of maxillofacial prosthesis technology which include implant, which can penetrate skin, and new materials. In order to produce maxillofacial prosthesis, general procedures of maxillofacial laboratory work should be understood first. Maxillofacial prosthesis and the dental prosthesis have many similarities in its academic perspective and originality. Maxillofacial prosthesis should be added into the curriculum for dental technology to achieve co-enhancement of the two fields.

• Journal of Korean society of Dental Hygiene
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• v.17 no.4
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• pp.681-691
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• 2017

Objectives: The purpose of this study is to investigate the relationship between education experience, awareness and practice of infection control during the prosthodontic treatment in clinical dental hygienists. Methods: A self-reported questionnaire was answered by 255 clinical dental hygienists in Seoul and Gyeonggi areas from October 10 to December 30, 2016. The questionnaire consisted of general characteristics of the subjects (8 items), dental prosthesis infection education experience (5 items), dental prosthesis infection awareness (5 items) and dental prosthesis infection practice (14 items) based on Likert 5 point scale. For statistical analysis, SPSS Statistic 22.0 was used. Results: A significant association was shown among education experience, awareness and practice of infection control during the prosthodontic treatment of clinical dental hygienists (p<0.001). Dental hygienists count, dental prosthesis infection education experience and awareness had positive influences, but the age group from 26 to 30 had negative influence on dental prosthesis infection practice. Conclusions: The study confimed that the dental prosthesis infection education program and continued education is necessary for the safety and health of patients, and to prevent the cross-infections of the clinical dental hygienists.

• Tribology and Lubricants
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• v.24 no.1
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• pp.44-48
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• 2008

The wear characteristics of the gold alloy dental prosthesis have been investigated. The wear tests were performed by using a pin-on-disk wear tester at room temperature. Vickers hardness and fracture toughness measurement of dental materials were preformed. Microscopic observations on worn surfaces of specimens were conducted by microscope. The friction coefficient of the gold alloy dental prosthesis was investigated according to weight and slinging velocity. The hardness of the gold alloy dental prosthesis were similar and a half of the enamel of natural teeth.

• Journal of Technologic Dentistry
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• v.43 no.1
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• pp.19-28
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• 2021

Purpose: This study aimed to obtain basic data on oral health improvement by investigating the EQ-5D index according to the oral prosthesis status of elderly persons aged 65 years or older in Korea using the Seventh Korea National Health and Nutrition Examination Survey. Methods: In this study, 3,426 elderly persons aged 65 years or older were included to analyze the relationship between the dental prostheses status and EQ-5D index in the collected data. Results: Compared to the "complete denture" in oral prosthesis, EQ in case of no dental prostheses or fixed dental prostheses is comparable to removable prosthetics such as "no dental prostheses," "one fixed bridge," and "two or more fixed bridges." Removable partial denture and complete denture required for the maxillary and mandibular EQ-5D index were significantly higher in "not necessary" than in "complete denture necessary" in all the elderly persons. Conclusion: The condition of the dental prosthesis and the need for a removable partial denture and complete denture for the elderly's EQ-5D index were confirmed, and it was found that the fixed dental prostheses were more effective than the removable dental prostheses. Therefore, oral health education programs for the elderly should be developed to promote dental function and oral health maintenance.

• Journal of Technologic Dentistry
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• v.33 no.3
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• pp.227-236
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• 2011

Purpose: The purpose of this study was to reduce the remake rate of dental prosthesis. We examined remake cause and major factor of dental prosthesis to determine methods for raising dental prosthesis satisfaction. Methods: Subjects included dental technicians in the metropolitan areas of the cities of Daegu and Gyeong-buk. Surveys were filled out by consenting dental technicians. Statistical analysis was done using SPSS version 19.0 for Windows. We determined frequencies and percentage, calculating means, and standard deviations, and determining statistical significance using t-tests, analysis of variance. Results: Impression or material transform is high among remake cause and margin is high among remake major factor. Crown class showed differences in General characteristics associated with age, number of employees, and number of connection dental. Porcelain class showed differences in General characteristics associated with age, number of employees, and number of connection dental. Denture class showed differences in General characteristics associated with age, monthly salaray, and career. Implant class showed differences in General characteristics associated with age, education, and career. Conclusion: In order to reduce remake rate of dental prosthesis, communication of dentist, dental technician, and the patient are require and correct information of patient and dental prosthesis are need.

• Journal of Technologic Dentistry
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• v.23 no.2
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• pp.75-93
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• 2002

This research was preformed for the purpose of preparing the items of standard model of the national dental technician test base on the duty analysis of the dental technician. The results of the duty analysis for the dental technician follows. 1. The dental technician is a profession to make the oral function smooth through the dental supplement and equipment in a scientific method and the skilled technique. 2. The duty of the dental technician are determined as A. preparation for manufacture B. manufacture C. management of the place of the dental technology D. self-development. A. The field of "the preparation for manufacture" are determined as 1. to confirm work authorization 2. To confirm the working model, B. The field of "In manufacture" are determined as 1. to manufacture the temporary crown 2. to manufacture the inlay and crown & bridge prosthesis 3. to manufacture the porcelain fused metal crown prosthesis 4. to manufacture the all ceramic crown prosthesis 5. to manufacture the temporary denture prosthesis 6. to manufacture the partial denture prosthesis 7. to manufacture the complete denture prosthesis 8. to manufacture the attachment prosthesis 9. to manufacture implant prosthesis 10. to manufacture the removable orthodontic device, 11. to manufacture the fixed orthodontic device, 12. to manufacture the orthodontic study cast C. The field of "in management of the dental lab." are determined as 1. management 2. to control the dental lab. D. The field of "In the self-development" are determined as 1. to improve the professionalism 2. self-control. 3. The developing items selected under the duty evaluation of the dental technician are l7s in the manufacture preparation, 1,011s in the manufacture, 7s in the management for the dental technology, 5s in self-development, and in all together 1,040s

• Journal of Technologic Dentistry
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• v.40 no.2
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• pp.73-82
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• 2018

Purpose: The purpose of this study was to investigate the production environment of crown prosthesis for National Health Insurance(NHI) benefit. Methods: This study carried out self-administered questionnaire survey from September 1, 2016 to October 31 by having research subjects as 261 dental technician. Except 100 copies with incomplete response, 161 copies were used as the materials of final analysis. Results: Unlike gold crowns, the material cost of metal crowns was paid at the dental laboratory(86.3%). Total material consumption for making metal crown was more than gold crown(63.4%), especially for the finishing and polishing processes(78.3%). The subjects responded that a routine dental laboratory fee of crown prosthesis is unreasonable, and it is necessary to adjust and improve it(metal crown 96.2%, gold crown 96.9%). NHI coverage dental prosthesis was not marked on the order form(46.0%), and the dental laboratory fee of that was nor received(64.0%). Conclusion : It is necessary to estimate the NHI cost level of the crown prosthesis by reflecting the production environment and engineering process in dental laboratories. In addition, institutional arrangement should be backed up so that dental laboratories can receive appropriate dental laboratory fee.

• Journal of Oral Medicine and Pain
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• v.20 no.2
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• pp.317-325
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• 1995

This study was performed to investigate the mean life expectancy of dental prosthetic restorations. The author has examined 352 dental prosthesis clinically and radiologically, and decided the success(survival) and failure(mortality) of the dental prosthesis. The dental prosthesis which had been treated in the Seoul National University Dental Hospital, two private clinics in Seoul, one university dental hospital, and two private clinics in local province were included in this study. The survival analysis using product limit estimator was used and the mean life expectancy of each type of dental prosthesis was calculated. The results were as follows : 1. The life expectancies were 10.5 years in gold crown and bridge, 8.5 years in porcelain fused to metal crown and bridge, 8.3 years in nonprecious metal crown and bridge, 8.1 years in removal partial denture, and 7.7 years in full denture. 2. The causes of mortality were in the order of dental caries(24.6%), fracture of dental prosthesis(19.2%), periodontal problems(18.6%), chronic chewing difficulty and dysfunction due to dental prosthesis(15.0%), excessive exposure of abutments due to the marginal defect of dental prosthesis(14.4%), abnormal occlusion due to severe attrition of artificial teeth in dentures(3.0%), periapical problems(2.4%), perforation of dental prosthesis(1.8%), and loose contacts with neighboring tooth(1.2%). 3. Among survival cases, 66.5% showed normal chewing ability and 31.9% showed partial chewing ability. However, 1.6% of them complained loss of chewing ability. 4. Among failure cases, 6.6% showed normal chewing ability and 38.9% showed partial chewing ability. However, 54.5% of them complained loss of chewing ability.