• 대한치과보철학회지
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• 제5권1호
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• pp.1-12
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• 1964

• 대한치과보철학회:학술대회논문집
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• 대한치과보철학회 1999년도 Asian Academy of Prosthodntics. Korean Academy of Prosthodontics
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• pp.50-50
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• 1999

• 대한치과기공학회지
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• 제2권1호
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• pp.67-68
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• 1980

• 대한치과보철학회지
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• 제44권1호
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• pp.29-39
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• 2006

Statements of problem: Zirconia core is used for posterior fixed partial dentures because it's good mechanical properties. Stress is concentrated on connectors in fixed partial dentures, so the proper design of connector areas is needed for adequate mechanical long-term properties of any prosthesis. The area of connector is critical, but tooth size and surrounding soft tissue limit the connector design. Purpose: The purpose of this study is to compare fracture strengths between different connector designs of zirconia core for posterior fixed partial dentures manufactured with CAD/CAM system and determining the optimal connector design satisfying strength and hygiene. Material and method: The following four groups of 40 posterior fixed partial denture specimens(each group 10) were fabricated as followed; group 1 vertical height of connector is 3mm (control group, all groups have the same condition); group 2, lingual vertical 1mm reinforcement on connector; group 3, lingual vertical 2mm reinforcing on connector and group 4, lingual vertical 3mm reinforcing on connector. Specimens were subjected to compressive loading on the central fossa of pontic by instron. SEM was used to identify the initial crack and characterize the fracture mode. Results: The results were as follows: 1. The mean fracture load of the non-lingual reinforcing group was 1212N and the lingual vertical 1mm reinforcing group was 1510N, the lingual vertical 2mm reinforcing group was 1882N, the lingual vertical 3mm reinforcing group was 1980N. 2. The reinforcing groups were statistically significant compared to non-reinforcing groups(P<0.001). 3. There were 2, 3mm reinforcing groups that were statistically significant compared to 1mm reinforcing groups(P<0.001), and the 3mm reinforcing group was not statistically significant compared to 2mm reinforcing groups(P>0.05) 4. Fractures were initiated in gingival embrasures of connectors and processed to the loading site. Conclusion: In this study, lingual reinforcement of connector for improved strength of zirconia based fixed partial denture is nessasary. And long-term study for clinical application is required

• The Journal of Advanced Prosthodontics
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• 제6권2호
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• pp.133-137
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• 2014

PURPOSE. The purpose of this study was to evaluate the patients' knowledge on dental implants in a Turkish subpopulation. MATERIALS AND METHODS. Five hundred twenty seven Turkish adults referred to Yeditepe University Faculty of Dentistry, Istanbul, Turkey, were presented with a questionnaire including 20 questions regarding the level of information and awareness about the dental implants. The data were collected and statistical analyses were performed with Chi square test to compare the descriptive data. RESULTS. Among 527 subjects, 54% were female and 46% were male with a mean age of 42.2 years. The rate of patients' implant awareness was 27.7%. When the patients were questioned about the treatment options for rehabilitation of tooth missing, 60.9% of patients were informed about fixed partial denture, followed by conventional complete denture (32.5%) and removable partial denture (24.9%). Six percent reported that they were very well informed about the dental implants whereas 48.2% were poorly informed. The information sources of the implants were from the dentist (44.5%), printed media (31.6%) and friends and acquaintances (17.3%), respectively. Sixteen percent of the population believed that their implants would last forever. CONCLUSION. The dentists should give more detailed information to the patients about dental implants and tooth-supported fixed partial dentures in the future.

• 대한치과보철학회지
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• 제41권1호
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• pp.81-88
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• 2003

Resin-bonded bridge has been an alternative to conventional bridge, since resin-bonded bridge has many attractive advantages such as minimal tooth preparation, short chair time and low cost over conventional bridge. Unfortunately, however, it was reported that resin-bonded bridge showed high failure rate from debonding of retainer in spite of consecutive advances in preparation and materials. And it was shown that multiple abutments were more likely to fail. The majority of debonding failure was considered due to the mobility of the abutment during function. In this view, recently, modification in resin-bonded bridge design was tried. Single retainer, single pontic. 2-unit cantilevered resin-bonded bridge was applied to clinical performance and was shown as retentive or more retentive than fixed-fixed type resin-bonded bridge. This was consistent with the results of studies in 2-unit cantilevered resin-bonded bridges made with all ceramic, In-ceram. The purpose of this article was to overview principles of design and to analyze clinical results of 2-unit cantilevered resin-bonded bridge in comparison with the reports of fixed-fixed resin-bonded bridge.

• 대한치과보철학회지
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• 제62권3호
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• pp.215-223
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• 2024

본 증례의 환자는 기존 의치에 불편함을 느껴 새로운 의치를 원하여 내원하였다. 하악 좌측 제2대구치를 제외한 모든 치아를 상실한 상태였다. 환자의 나이가 65세였기에 임플란트와 의치를 국민건강보험 제도를 이용하여 치료할 수 있었고, 환자는 하악에 임플란트를 이용한 의치 제작을 원하였다. 새 의치에 적응하기 위해 임시 의치를 제작하여 장착하고 충분한 적응 기간을 거쳐서 치료를 진행하였다. 상악은 총의치, 하악은 전방부에 임플란트 2개를 식립하여 임플란트 상부 보철물을 서베이드 크라운 형태로 제작하고 임플란트 보조국소의치를 제작하였다. 골흡수가 심한 하악 소수 잔존치 상태에서 효율적인 치료 비용과 기능적으로 환자와 술자 모두 만족하였다. 임플란트 상부 보철물을 서베이드 크라운 형태로 제작한 임플란트 보조 국소의치는 경제적, 해부학적인 한계로 총의치, 임플란트 피개의치, 임플란트 지지 완전 고정성 보철이 어려운 경우에 효과적인 대안이 될 수 있다. 그러나 과학적으로 근거가 높은 수준의 연구가 부족하여 향후 면밀한 정기검진 및 교합 검사가 필요할 것이다.

• 구강회복응용과학지
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• 제36권2호
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• pp.61-69
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• 2020

목적: 하악 제2소구치와 제2대구치를 지대치로 한 지르코니아 고정성 국소의치에서 지대치 간 거리가 파절저항성에 미치는 영향을 조사하였다. 연구 재료 및 방법: Cameleon S zirconia block과 Luxen S2 zirconia block으로 각 재료별 지대치 간 거리를 달리 하여 CS군과 S2군으로 나누어 표기하였으며, 소결된 지르코니아 고정성 국소의치를 임시접착시멘트를 이용하여 에폭시 레진 다이에 합착하였다. 이후, 가공치 교합면에 직경 6 mm 강철구를 위치시켜 로드셀 5.0 kN의 universal testing machine에서 크로스 헤드 속도 1.0 mm/min로 압력을 가하여 파절저항성을 측정하였다. 결과: 지르코니아 고정성 국소의치의 파절저항성은 지대치 간 거리에 큰 영향을 받지 않았다. CS군에서 지대치 간 거리가 15 mm인 경우가 13 mm와 17 mm인 경우보다 파절저항성이 유의하게 높았다(P < 0.05). S2군에서는 파절저항성이 세 군 간에 유의한 차이가 없었다(P > 0.05). 결론: 하악 제2소구치와 제2대구치를 지대치로 한 지르코니아 고정성 국소의치에서 지대치 간 거리는 지르코니아의 종류에 따라 파절저항성에 영향을 줄 수 있다.

• The Journal of Advanced Prosthodontics
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• 제9권3호
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• pp.232-237
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• 2017

Dentists often place post and core buildups on endodontically treated abutments for crown and bridge restorations. This article analyzes the bio-mechanical purposes, advantages and disadvantages of placing a core or a post and core in an endodontically treated tooth and reviews literature on post and core biomechanics. The author assesses the scientific rationale of the claim that the main purpose of a post is to retain a core, or the claim that posts weaken teeth. More likely, the main function of a post is to help prevent the abutment, on which a crown is cemented, from fracturing such that the abutment separates from the tooth root, at a fracture plane that is located approximately and theoretically at the level of the crown (or ferrule) margin. A post essentially improves the ferrule effect that is provided by the partial fixed denture prosthesis. This paper also explores the difference between bio-mechanical failures of crowns caused by lack of retention or excess taper, versus failures due to a sub-optimal ferrule effect in crown and bridge prostheses.

• 대한치과의사협회지
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• 제49권2호
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• pp.85-94
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• 2011

In the filed of Dentistry, minimally invasive treatment modalities are new trend for conservation of natural teeth. Of them, laminate veneer and resin bonded fixed partial denture belong to restoration procedures. In this review, survival rates of each modalities and cause of unserviceability are analyzed, and criteria for success are presented. To get successful results of minimally invasive restoration, plenty of enamel layer, thin and strong materials, and high bonding strength are essential under cyclically loaded wet oral condition. Newly tried design of minimally invasive technique nowadays have to be evaluated only on the basis of requirement for long-term success.