• 대한치과보철학회지
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• 제55권2호
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• pp.212-217
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• 2017

임플란트의 협설 측으로 잔존 골조직이 불충분할 경우 골증대술을 시행하지 않기 위해서는 작은 직경의 임플란트를 사용할 수 있다. 작은 직경 임플란트의 경우는 파절 저항성이 낮고, 골과 임플란트의 접촉 면적이 좁아 구치부에는 부적절한 것으로 여겨져 왔다. 최근의 연구에서는 새로운 임플란트 합금의 개발 및 표면 처리방법의 발전으로 구치부에서도 표준 직경 임플란트와 유사한 성공률이 보고되고 있다. 이 증례에서는 구치부 상실 부위 잔존골의 협설 폭이 부족한 상황에서 작은 직경 임플란트를 이용하여 심미적, 기능적으로 만족스러운 치료 결과를 보였다. 현재까지 추적 검사 기간은 4년 이상 되었고 특이할만한 합병증 없이 유지되었다. 향후 장기적인 안정성에 대한 추가적인 연구가 필요할 것으로 사료된다.

• The Journal of Advanced Prosthodontics
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• 제12권4호
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• pp.239-249
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• 2020

PURPOSE. The purpose of this study was to investigate survival rates of the implants used in implant assisted removable partial dentures (IARPDs). MATERIALS AND METHODS. The study was conducted on 21 patients who were treated with IARPDs. The mean follow-up period for IARPD patients ranged from 12 to 185 months (mean 47.9 months). A total of 58 implants were used for IARPDs in two different modalities: 41 for surveyed crowns and 17 for overdentures. The survival of implants was determined by clinical and radiographic evaluations considering relevant factors: location, RPD classification, opposing dentition, splinting, and implant diameter. RESULTS. The survival rate of total 58 implants was 93.1%: 95.1% for implants supporting surveyed crowns and 88.2% for implants used in overdentures. Considering only the implants supporting surveyed crown, regular diameter implants showed a higher survival rate than narrow or wide diameter implants. CONCLUSION. The survival rate of the implants used in IARPDs was 93.1% (surveyed crown: 95.1%, overdenture: 88.2%).

• 대한심미치과학회지
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• 제25권1호
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• pp.25-34
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• 2016

상실한 하악 4전치에서의 치료 계획은 어느 다른 부위보다 수술의 성공률이나 보철치료시 유리한 환경을 지니고 있다고 흔히 생각되는 부위이다. 하지만 하악 전치들의 M-D 사이즈나 crowding으로 인한 공간적 제한, 임시치아 문제, 치조골 흡수로 인해 생기는 심미적인 문제 등 의외로 까다로운 경우가 종종 발생하는 부위기도 한다. 본문에서는 하악 4전치 상실 시의 치료 계확에 대해서 케이스를 통해 알아 보겠다. 하악 4전치 상실시 가능한 옵션들: 하나 혹은 4전치중 일부 상실의 경우나 잔존 치조골의 흡수가 거의 없어 임플란트 위치 관계가 심미적으로 중요하다고 판단되는 경우라면 직경이 작은 임플란트들을 원래 발치와 중앙에 식립(Narrow type 이나 One body mini implant type) 최종 보철물 형태가 Pink porcelain을 포함하는 이미 광범위한 치조골의 흡수가 일어난 경우 즉 임플란트 식립 위치가 덜 중요한 상황이라면 regular size의 임플란트들을 측절치와 중절치의 사이 Interseptal bone위치에 식립 4전치중 하나 혹은 일부가 상실됐고 남아 있는 전치들의 예후가 불량하다고 의심되나 환자가 당장 나머지 전치들의 발치에는 동의하지 않을 때 남아 있는 전치들이 발치 될 때까지의 Tentative restoration로서 Resin Bonded Bridge(Resin Retained Bridge/Resin Bonded Fixed Partial Denture)의 적용.

• 대한치과보철학회지
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• 제60권1호
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• pp.119-126
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• 2022

하악 전치부와 같이 골 폭이 좁은 환자에서 미니 임플란트 사용은 기존의 직경 임플란트의 대안으로 보고된다. 그러나, 기존 일체형 미니 임플란트의 사용시 보철물 탈락과 시멘트 사용으로 인한 임플란트 주위염과 같은 합병증의 발생이 보고되고 있다. 최근 미니 임플란트의 유지력 및 안정성을 높이기 위해 상부에 부가적인 유지구조를 가진 일체형 미니 임플란트가 소개되었다. 상부 탄성부를 스프레더로 벌려 줌으로써 지르코니아 보철물 내면의 결합구조와 결합하는 방식을 기반으로 한다. 이에 본 증례는 좁은 폭경의 하악 전치부에서 상부에 결합구조를 가진 일체형 미니 임플란트를 통하여 이러한 합병증을 줄이고자 하였으며 디지털 시스템을 이용하여 전반적인 치료기간을 단축하였다. 두명의 환자에서 유지기능과 심미적인 면에서 만족스러운 임상결과를 얻었기에 본 증례를 보고하고자 한다.

• Journal of Periodontal and Implant Science
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• 제50권2호
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• pp.97-105
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• 2020

Purpose: The present retrospective clinical study aimed to evaluate and compare the clinical and radiographic parameters, complications, and satisfaction in patients who received fixed prostheses supported by narrow-diameter implants (NDIs) in the anterior and posterior jaw. Methods: Patients aged ≥30 years who had NDI-supported fixed prostheses in the anterior or posterior region of either jaw for at least 2 years were included. Complications such as chipping of the crown; loosening or fracture of the screw, crown abutment, or implant; and loss of retention were recorded. Clinical peri-implant outcomes and crestal bone loss (CBL) were measured. A questionnaire was used to record responses regarding the aesthetics and function of the fixed restorations. Analysis of variance was used to assess the significance of between-group mean comparisons. The log-rank test was performed to analyze the influence of location and prosthesis type on technical complications. Results: Seventy-one patients (mean age: 39.6 years) provided informed consent with a mean follow-up duration of 53 months. Only bleeding on probing showed a statistically significant difference between NDIs in the anterior and posterior regions. The complication rate for NDIs in the posterior region was significantly higher than that for NDIs in the anterior region (P=0.041). For NDIs, CBL was significantly higher around splinted crowns than single crowns (P=0.022). Overall mean patient satisfaction was 10.34±3.65 on a visual analogue scale. Conclusions: NDIs in the anterior and posterior jaws functioned equally well in terms of periimplant soft and hard tissue health and offered acceptable patient satisfaction and reasonable complication rates.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제36권4호
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• pp.325-330
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• 2010

Introduction: Mini-implant system is applicable to areas of narrow space and area requiring temporary loading support. The purpose of this study was to evaluate the clinical outcome of a mini-implant system as well as the application of mini-implant system in the dental clinical field. Materials and Methods: The patients who had been operated from Jan 2007 to Dec 2007 in the four dental facility including Seoul National University Bundang Hospital were enrolled. To evaluate the factors associated with the clinical outcome, the patients were classified according to gender, age, area of surgery, type of implant, diameter and length of the implant, and the purpose of the mini-implant system application. Results: From 147 implants, only three implants failed, one of them was for temporary loading. There were no serious surgical or prosthetic complications in this study. Conclusion: An analysis of the preliminary data revealed a satisfactory clinical outcome. However, more long-term evaluation of narrow ridge type as well as the patient’s satisfaction on the use of a provisional type mini-implant system is needed.

• 대한심미치과학회지
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• 제27권2호
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• pp.97-104
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• 2018

하악 전치부는 다른 구강 내 영역에 비해 높은 임플란트 성공률과 더 나은 접근성을 갖고 있다. 비록 부적절한 드릴링으로 인한 설측 피질골 천공 가능성과 설동맥 손상으로 인한 출혈 가능성이 있더라도 다른 부위와 비교했을 때 주요 해부학적 구조물이 적기 때문에 상대적으로 안전하다. 또한 상악 전치부와 비교했을 때 환자들이 심미적으로 덜 민감한 부위이다. 그러나 좁은 협설측 치조골 폭 때문에 이상적인 임플란트 식립 위치로의 식립은 상악 전치부만큼 어렵다. 이러한 하악 전치부에서 일체형 임플란트는 매우 유용한 치료방법이다. 하악 전치의 해부학적 치근형태와 얇은 치조골을 고려할 때, 임상적으로 3mm보다 큰 직경의 임플란트 식립은 어렵다. 본 증례는 하악 전치부 무치악 부위에서 일체형 임플란트의 식립과 즉시 부하를 동반하여 심미적인 보철물을 구현한 경우이다.

• Journal of Korean Dental Science
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• 제15권1호
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• pp.92-99
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• 2022

This case report describes the immediate loading of narrow diameter implants in the mandibular incisor area using full-digital flow. The 3-dimensional position of the implants was planned using digital software, and the corresponding surgical template was fabricated. The implants were inserted immediately after extraction and on the same day, the interim abutment and bridge were placed. At 8 weeks after surgery, the stability of the implants was measured and a digital impression was made using a scan body. Customized titanium abutments and a cement-type full zirconia bridge were delivered. At 36 weeks' follow-up, no clinical or radiographic complications were detected, and the patient was satisfied with the results.

• The Journal of Advanced Prosthodontics
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• 제8권4호
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• pp.304-312
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• 2016

PURPOSE. The aim of this study was to investigate the stress distribution of 2-short implants (2SIs) installed in a severely atrophic maxillary molar site. MATERIALS AND METHODS. Three different diameters of internal connection implants were modeled: narrow platform (NP), regular platform (RP), and wide platform (WP). The maxillary first molars were restored with one implant or two short implants. Three 2SI models (NP-oblique, NP-vertical, and NP-horizontal) and four single implant models (RP and WP in a centered or cantilevered position) were used. Axial and oblique loadings were applied on the occlusal surface of the crown. The von Mises stress values were measured at the bone-implant, peri-implant bone, and implant/abutment complex. RESULTS. The highest stress distribution at the bone-implant interface and the peri-implant bone was noticed in the RP group, and the lowest stress distribution was observed in the 2SI groups. Cantilevered position showed unfavorable stress distribution with axial loading. 2SI types did not affect the stress distribution in oblique loading. The number and installation positions of the implant, rather than the bone level, influenced the stress distribution of 2SIs. The implant/abutment complex of WP presented the highest stress concentration while that of 2SIs showed the lowest stress concentration. CONCLUSION. 2SIs may be useful for achieving stable stress distribution on the surrounding bone and implant-abutment complex in the atrophic posterior maxilla.

• 대한치과의사협회지
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• 제46권4호
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• pp.243-247
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• 2008

Purpose : Ridge expansion osteotomy (REO) has been introduced when it is necessary to expand narrow crestal ridge with simultaneous implant placement. This study has designed to evaluate the clinical availability of REO. Materials and methods : Subject were patients who had visited Seoul National University Bundang Hospital from July. 2003 to December, 2005 for implant placement using REO by one surgeon. Intraoperative and postoperative complication, failure of initial osseointegration and marginal bone resorption were estimated using electronic medical record and periapical radiography. Twenty?three patients, 8 males and 15 females, mean age 51, ranged 18 to 72, were treated for mean 26 months, ranged from 16 months to 46 months. Results : Mean diameter and length of implants placed at upper anterior, were 3.72mm and 13.32mm each other. Guided bone regeneration and ridge splitting were accompanied in this study. Five cases of cortical bone fracture, three cases of crestal bone loss more than 2mm, 2cases of gingival recession, and 2 cases of infection were noted, but there were no implants removed because of disintegration. Success rate of implant was 91.7%, even if survival rate of implant was 100%. In addition, there were no statistical significance between the success rate of REO and bone graft(p>0.05). Conclusion : Based on the results of the present study, it can be concluded that REO technique is reliable for implant placement at atrophic ridge with adequate height compared to bone graft and other osteotomies for ridge expansion, but care should be taken of esthetic problem such as gingival recession because of crestal bone resorption from trauma by osteotome.