• 대한치과기공학회지
• /
• 제38권1호
• /
• pp.9-22
• /
• 2016

Purpose: The Purpose of this study are to describe the Dental field of present health insurance for custom-made prosthetic implant by dental technicians' work. Results: A total of 300 dental technicians working at dental laboratories in Korea were randomly selected and surveyed, 206(68.7%) of them were used for the statistical analysis. Conclusion: Average daily working time was 10 hours 66%. The average cumulative credit of the clinic for dental prosthesis fabrication rates was Less than 10 million won(21.8%), 10~80 million won(11.7%), more than one hundred million won(1.5%). Remake dental prosthesis was one more than the monthly average of 98.5%. Causes of remake dental prosthesis was dentist impression 83% but did not pay 62.5%. Dental technicians Implant production period was 7 days(48.5%), 10 days(35%) was commissioned by dentists production time is 5 days(46.1%), 7 days(36.5%). President of dental laboratories 3.86 points and dental technicians 3.06 points knew differently about starting of implant health insurance coverage(p<.001). They alike were in favor of insurance coverage for the implant. Dental technicians were lower by 2.36 points for work do you know whether your health insurance application of dental prostheses. Dental technicians are 2.16 points on whether confidence in the pores payment of insurance coverage dental prosthesis, dental laboratory president was lower by 1.85 points. They are very low with 1.97 points on whether confidence in the rate payment of health insurance coverage dental prosthesis(p<.01). The implant prosthesis abutment selected, the abutments designed, design of the implant upper prosthetic, the upper prosthetic fitting dental technicians participate of dental laboratory president showed higher score (p <.05). Conclusion: Hours of dental technicians were making this short period of remake dental prosthesis-related dental prosthesis. Dental clinic and a detailed representation of the dental prosthodontic fabrication request is required for communication between the laboratory in order to reduce the remake of a dental prosthesis, dental insurance coverage written dental prosthodontic fabrication request should be legislated. Implant classification standard medical practice 1-3 Step conduct a thorough costing a total of no. 73 of the correct classification standard medical practice in addition to eight times defined by the act of dental technicians should be defined.

• 대한치과보철학회지
• /
• 제52권4호
• /
• pp.352-358
• /
• 2014

최근 지르코니아와 CAD/CAM을 이용하는 심미적인 임플란트 보철치료 방법들이 많이 소개되고 있다. 그러나 이러한 방법들은 치은부위와 교합면부위에서 한계점들을 가지고 있다. 이에 본 증례에서는 지르코니아와 CAD/CAM 시스템을 이용하여 고정체 1 mm 상부에서부터 형성되는 점막하지르코니아 임플란트 보철물을 제작하고 이를 타이타늄 지대주와 접착하여 시멘트 나사 유지형 보철물을 제작하였다. 임상적으로 심미적이고 기능적면에서 만족할 만한 결과를 얻었기에 이를 보고하고자 한다.

• Structural Engineering and Mechanics
• /
• 제55권1호
• /
• pp.65-78
• /
• 2015

In recent years, implants have gained growing importance in all areas of medicine. The success of the treatment depends on many factors affecting the bone-implant, implant-abutment and abutment-prosthesis interfaces. In this paper, static and dynamic behaviors of the dental prosthesis are investigated. Three-dimensional finite element models of dental prosthesis were constructed. Dynamic loads in 5 sec applied on occlusal surface. Therefore, FEA was selected for use in this study to examine the effect of the static and dynamic loads on the stress distribution for an implant-supported fixed partial denture and supporting bone tissue.

• 대한치과의사협회지
• /
• 제47권9호
• /
• pp.585-595
• /
• 2009

Purpose : The aim of this study was to compare surgical complications between simple implant placement and implant placement combined with complicated surgical procedures. We also evaluated prosthetic complications according to the specific types of prosthesis. Material and Method : A retrospective analysis of dental chart of patients who was performed implant therapy during the period from June 2003 to December 2005 was carried out. This study was performed on 408 patients (208 male, 200 female). In addition, 1671 implants were performed. Based on their medical record and radiographs, the authors evaluated surgical and prosthetic complications, surgical procedures accompanied at the time of implant, risk factors of implant failure etc. Result : Surgical complications were developed on 358 implants(21.4% on total placed implants) and wound dehiscence was most prevalent complication. On maxillary posterior area, surgical complications developed more frequently on implants with major surgery and showed a significant difference. And complication rate of implants accompanied with GBR was higher than that of simple implants placement and also showed significant difference. The implant supported prosthesis showed no statistical difference in the occurrence of complications according to the types of prosthesis, and food retention was the most common post-prosthetic complication. Also we speculated that length and width of implant showed significant correlation to the failure of implant primary osseointegration. Conclusion : Based on the result, clinician should provide more careful maintenance for patients with implant placement accompanied by complicated surgical procedure. And periodic maintenance for the patient is requested for long-term survival of implant therapy.

• Journal of Korean Dental Science
• /
• 제15권1호
• /
• pp.84-91
• /
• 2022

An all-on-4 restoration allows edentulous patients to use a fixed prosthesis with a minimum number of implants. These implant-supported fixed complete dentures have traditionally been fabricated as screw-retained or cement-retained prostheses. However, it is difficult to passively fit the long-span full-arch prosthesis using the screw-retained type restoration, and predictable retrievability is not obtained with the cement-retained type. This case report describes a prosthesis fabricated using a combination of the two retention types. The screwmentable method allows the implant-supported fixed complete denture to achieve a passive fit at the connection with retrievability. In addition, a framework with an optimized size was designed by using digital dental technology.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제47권2호
• /
• pp.149-150
• /
• 2021

Bruxism is defined as a parafunctional activity during sleep or while awake that includes locking and grinding of teeth and clenching. It generates excessive occlusal force that may lead to implant failure. Therefore, diagnosis of bruxism and providing specific protocols such as occlusal splint and/or injection of botulinum toxin before implant installation are important to prevent increases the risk of implant failure in bruxism patients.

• 대한치과보철학회지
• /
• 제44권5호
• /
• pp.584-593
• /
• 2006

Statement of problem : Dental implant which has been developed gradually through many experiments and clinical applications is presently used to various dental prosthetic treatments. To conduct a successful function of implant prosthesis in oral cavity for a long time, it is important that not only structure materials must have the biocompatibility, but also the prosthesis must be designed for the stress, which is occurred in occlusion, to scatter adequately of load support. Therefore, it is essential to give the consideration about the stress analysis of supporting tissues for higher successful rates. Purpose : Recently, many implant manufacturing company produce various taper design of root form implant, the fixture is often selected. However, the stress analysis of taper form fixture still requires more studies. Material and method : This study we make the element models that five implant fixture; Branemark system(Nobel Biocare, Gothenberg, Sweden), Camlog system(Altatec, Germany), Astra system(Astra Tech, Sweden), 3i system(Implant Innovations Inc, USA), Avana system(Osstem, Korea) were placed in the area of mandibular first premolar and prosthesis fabricated, which we compared with stress distribution using the three-dimension finite element analysis under two loading condition. Results : This study compares the aspect of stress distribution of each system with the standard of Von mises stress, among many resulted from finite element analysis so that this research gets the following results. 1. In all implant system, oblique loading of maximum Von mises stress of implant, alveolar bone and crown is higher than vertical loading of those. 2. Regardless of loading conditions and type of system, cortical bone which contacts with implant fixture top area has high stress, and cancellous bone has a little stress. under the vertical loading, maximum Von mises stress is more higher in order of Branemark, Camlog, Astra, 3i, Avana. under the horizontal loading, maximum Von mises is more higher in order of Camlog, Branemark, Astra, 3i, Avana.

• The Journal of Advanced Prosthodontics
• /
• 제2권1호
• /
• pp.4-6
• /
• 2010

PURPOSE. The aim of this article is to analyze the preference for treatment modality of dentists. MATERIAL AND METHODS. Data of 20,038 patients was involved. Data analysis were done by distribution according to the various kinds of prosthesis, including complete denture, removable partial denture, fixed partial denture, implant-supported dental prosthesis as well as distribution according to the professional titles of the dentists finishing the treatment, including resident and professors. RESULTS. The number of cases of dental prosthesis increased year by year. 61.06% of the patients accepted fixed partial denture restoration. The number of patients who accepted implant supported restoration is also increasing year by year. The number of complete denture, implant-supported dental prosthesis finished by professors was larger than that done by residents, while it was contrary for removable partial denture, fixed partial denture, and the difference was statistically significant (P < .05). CONCLUSION. Professors and residents have some difference in the categorization of prosthesis finished. Fixed partial denture and implant-supported dental prosthesis are preferred.

• 대한치과의사협회지
• /
• 제55권7호
• /
• pp.457-466
• /
• 2017

In the case of failed fixed implant prosthesis accompanied by abutment screw fracture, fractured screw fragment must be removed to use the existing implant fixtures. A 61-year-old male patient, who had a failed maxillary fixed implant prosthesis accompanied by three abutment screw fracture, hoped to reconstruct the maxillary implant prosthesis, while maintaining the existing implant fixtures. To use the existing implant fixtures, fractured screw fragments were removed. A maxillary implant overdenture using available existing implants was planned. Bar-attachment with Locator was used for implant splinting, denture stability, and retention. Final impression was taken after treatment of peri-implantitis. Jaw relation registration was taken to evaluate available interarch space for bar-attachment. After fabricating bar-attachment, centric relation was taken. Implant overdenture using bar-attachment with Locator was delivered after wax-denture evaluation. This case report showed that a satisfactory clinical result was achieved by implant overdenture using existing implant fixtures in a maxillary edentulous patient.

• Journal of Periodontal and Implant Science
• /
• 제41권2호
• /
• pp.79-85
• /
• 2011

Purpose: The aim of this study was to obtain objective and standardized information on masticatory function and patient atisfaction following second molar single implant therap. Methods: Twenty adult patient, who had restored second molar single implants more than 1 month before the study, were enrolled in this stud. All patients received a chewing test using peanuts before and after insertion of the implant prosthesi, with a questionnaire and visual analogue scale (VAS) to evaluate the effect of second molar single implant therap. Results: his study obtained standardized information on the masticatory function objectively (e.g., P, R, $X_{50}$) before (Pre-insertion) and after insertion (Post-insertion) of the implant prosthesis. Masticatory performance (P) after insertion of the implant prosthesis significantly increased from $67.8{\pm}9.9$ to $84.3{\pm}8.5$% (P<0.0001). With the implant prosthesis, the P value increased by 24%. The masticatory efficiency index (R) of Post-insertion is higher than that of Pre-insertion (P<0.0001). With the implant prosthesis, the R value increased by 29%. The median particle size ($X_{50}$) of Post-insertion is lower than that of Preinsertion (P<0.0001). More than 90% of the patients were satisfied with the second molar single implant therapy from a functional point of view. Conclusions: These findings indicate that a second molar single implant can increase masticatory function.