• The Journal of Advanced Prosthodontics
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• 제5권1호
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• pp.67-72
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• 2013

Traumatic defects are mostly accompanied by hard and soft tissue loss. This report describes the surgical and prosthetic treatment of a patient with post-traumatic mandibular defect. A split-thickness skin graft was performed prior to implant placement and prefabricated acrylic stent was placed to hold the graft in place. The esthetic and functional demands of the patient were fulfilled by implant-supported screw-retained fixed prosthesis using CAD-CAM technology.

• Journal of Periodontal and Implant Science
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• 제14권1호
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• pp.78.2-78.2
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• 1984

• 대한치과보철학회:학술대회논문집
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• 대한치과보철학회 1999년도 Asian Academy of Prosthodntics. Korean Academy of Prosthodontics
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• pp.98.1-98.1
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• 1999

• 대한심미치과학회지
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• 제17권1호
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• pp.50-54
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• 2008

• 한국치위생학회지
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• 제14권5호
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• pp.617-622
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• 2014

With the explosive increase of esthetic demands by patients, many dental materials for the esthetic restoration have been introduced. Recently, zirconia based restorations are using for the cases of single crown, bridges, implant prostheses etc. Zirconia have superior mechanical properties and biocompatibility. Owing to the properties of high strength, zirconia has to be manufactured by CAD/CAM system. Dental CAD/CAM system is a futuristic treatment and technical system which makes it possible to produce the precision and uniform prosthesis and also standardize the treatments. This article introduces the characteristics of zirconia, fabrication procedure using CAD/CAM system and procedure for the cementation of zirconia based restoration.

• Journal of Periodontal and Implant Science
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• 제50권3호
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• pp.183-196
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• 2020

Purpose: This practice-based cross-sectional study aimed to investigate whether common risk indicators for peri-implant diseases were associated with peri-implant mucositis and peri-implantitis in patients undergoing supportive implant therapy (SIT) at least 5 years after implant restoration. Methods: Patients exclusively restored with a single implant type were included. Probing pocket depth (PPD), bleeding on probing (BOP), suppuration, and radiographic bone loss (RBL) were assessed around implants. The case definitions were as follows: peri-implant mucositis: PPD ≥4 mm, BOP, no RBL; and peri-implantitis: PPD ≥5 mm, BOP, RBL ≥3.5 mm. Possible risk indicators were compared between patients with and without mucositis and peri-implantitis using the Fisher exact test and the Wilcoxon rank-sum test, as well as a multiple logistic regression model for variables showing significance (P<0.05). Results: Eighty-four patients with 169 implants (observational period: 5.8±0.86 years) were included. A patient-based prevalence of 52% for peri-implant mucositis and 18% for peri-implantitis was detected. The presence of 3 or more implants (odds ratio [OR], 4.43; 95 confidence interval [CI], 1.36-15.05; P=0.0136) was significantly associated with an increased risk for mucositis. Smoking was significantly associated with an increased risk for peri-implantitis (OR, 5.89; 95% CI, 1.27-24.58; P=0.0231), while the presence of keratinized mucosa around implants was associated with a lower risk for peri-implantitis (OR, 0.05; 95% CI, 0.01-0.25; P<0.001). Conclusions: The number of implants should be considered in strategies to prevent mucositis. Furthermore, smoking and the absence of keratinized mucosa were the strongest risk indicators for peri-implantitis in patients undergoing SIT in the present study.

• 대한치과의사협회지
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• 제57권3호
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• pp.149-160
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• 2019

Atrophic alveolar ridge of maxillary anterior area is commonly observed after the extraction of teeth in patients with severely compromised periodontal disease, causing difficulties with implant placement. Successful esthetics and functional implant rehabilitation rely on sufficient bone volume, adequate bone contours, and ideal implant positioning and angulation. The present case report categorized the ridge augmentation techniques using guided bone regeneration (GBR) on the maxillary anterior site by Seibert classification. Case I patient presented for implant placement in the position of tooth #11. The alveolar ridge was considered a Seibert classification I ridge defect. Simultaneous implant placement and GBR were performed. Eight months after implantation, clinical and radiological examinations were performed. Case III patient presented with discomfort due to mobility of the upper maxillary anterior site. Due to severe destruction of alveolar bone, teeth #11 and #12 were extracted. After three months, the alveolar ridge was considered a Seibert classification III ridge defect. A GBR procedure was performed; implantation was performed 6 months later. Approximately 1-year after implantation, clinical and radiological examinations were performed. During the whole treatment period, healing was uneventful without membrane exposure, severe swelling, or infection in all cases. Radiographic and clinical examinations revealed that atrophic hard tissues and buccal bone contour were restored to the acceptable levels for implant placement and esthetic restoration. In conclusion, severely resorbed alveolar ridge of the maxillary anterior area can be reconstructed with ridge augmentation using the GBR procedure so that dental implants could be successfully placed.

• 대한치과기공학회지
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• 제43권2호
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• pp.42-47
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• 2021

Purpose: The purpose of this study was to evaluate the stability of abutment screws used with the zirconia fixture-based implant system and compare them with those used with the existing titanium fixture system via the finite element method. Methods: A single implant-supported restoration was designed for the finite element analysis. A universal analysis program was used to set 8 occlusal points along the direction to the long axis of the implant, and an occlusal load of 700 N was applied. Results: In all models (Zir and Ti-fixture model), the screw threads presented with the highest von Mises stress (VMS) values, whereas the head and end presented with the lowest VMS values. The VMS of the screw used in the zirconia-fixture model was 5.97% lower than that used in the titanium-fixture model (261.258 vs. 276.911 MPa, respectively) despite statistical significance. Furthermore, the zirconia fixture (352.912 MPa) had a higher stress value (8.42%) than the titanium fixture (332.331 MPa). In a completely tightened titanium fixture implant system, the stress was concentrated in the implant-abutment connection interface, the zirconia fixture presented with a stable stress distribution. Conclusion: Although the zirconia fixture demonstrated a high VMS value, owing to the stiffness and elasticity coefficients of the material, the stress generated in the abutment screws was similar in all models. In conclusion, the zirconia fixture-based implant system presented with a more stable stress distribution in the abutment screws than the titanium fixture-based implant system.

• 구강회복응용과학지
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• 제38권2호
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• pp.110-119
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• 2022

부분 무치악 환자의 가철성 국소의치 수복 시 지대치가 항상 유리한 위치에 존재하지는 않는다. 이로 인하여 잘 맞게 제작된 가철성 국소의치임에도 불구하고 환자는 가철성 국소의치의 안정과 지지에 대하여 만족하지 못하는 경우가 발생하게 된다. 이 때, 소수의 임플란트 크라운을 이용한 가철성 국소의치가 부분 무치악 환자에게 좋은 대안이 될 수 있다. 소수의 임플란트를 위치시키고 지대치로 이용하여 가철성 국소의치의 안정과 지지를 증가시킬 수 있다. 본 증례는 하악 편측에 잔존치를 갖는 환자에서 두개의 임플란트를 전략적으로 위치시켜 지대치를 양측으로 분포시켰다. 최종 가철성 국소의치 수복 이후 환자는 저작 기능에 만족감을 보였으며 국소의치 사용시 편안함을 나타내었다.

• 대한심미치과학회지
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• 제31권2호
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• pp.64-74
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• 2022

최근 치과 임상 영역에 디지털이 접목되면서 디지털을 활용한 임상 진료가 점차 일반화되어가고 있다. 현재까지의 디지털 치과진료는 구강스캔 등의 자료채득, 가이드를 활용한 수술, CAD CAM을 사용한 보철물 제작 등의 직접적인 부분에 다소 집중된 감이 있으나, 치과 진료의 시작인 진단 및 치료계획 수립 단계에서도 디지털의 활용은 큰 효용을 가지고 있다. 이번 증례에서는 전치부 수복을 위해 내원한 환자에게 구치부를 포함한 상악 전체의 수복을 이해시키고, 교합고경을 재설정하여 수복하는 과정의 가이드라인으로 사용한 digital mockup의 활용 예를 보고하고자 한다.