• Journal of Periodontal and Implant Science
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• 제34권4호
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• pp.819-836
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• 2004

Nowdays, the awareness of implant treatment has grown rapidly among dentists and patients alike in Korea, as it becomes a widely accepted treatment. The reason is that unlike crown and bridge or denture treatment, implant treatment helps preserve existing bone and improve masticatory functions. So, It is needed understanding about the type, distribution of implant patient. The following results on patient type and implant distribution were compiled from 4433 implant cases of 1596 patients treated at the periodontal dept. of Y University Hospital during 1992 to 2004. 1. There are no dissimilarities between men and women, with patients in their 40, 50s accounting for 52.5% of patients and 57.5% of implant treatments; the largest share of patients and implant treatments. 2. Mn. posterior area accounted for 54.9% of implant treatments followed by Mx. posterior area(27.6%), Mx anterior area(11.9%) and Mn anterior area(5.6%). 3. Partial edentulous patients treated by single crown and bridge-type prosthesis accounted for 97.5% and fully edentulous patient accounted for the remaining 2.5%. 4. The major cause of tooth loss is periodontal disease, followed by dental caries, trauma and congenital missing. Also, older people are more likely to suffer from tooth loss due to periodontal disease rather than dental caries. 5. In the distribution of bone quality for maxillae, type III was most, followed by type II, r type IV and r type I. As for mandible, type II was most, followed by type III, type IV and for type I. 6. In the distribution of bone quantity for maxillae, type C was most, followed by type B, type D, type A, and for type E. As for mandible, type B was 52% most, followed by type C, type D, type A and type E. 7. The majority of implants were those of 1O-14mm in length (85.2%) and regular diameter in width (64%). The results provided us with basic data on patient type, implant distribution, bone condition, etc. We wish that our results coupled with other research data helps assist in the further study for better implant success/survival rates, etc.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제43권2호
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• pp.100-105
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• 2017

Objectives: Localization of the mandibular canal (MC) and measurement of the height and width of the available alveolar bone at the proposed implant site in the posterior segment of the mandible using cone-beam computed tomography (CBCT) in patients with a single missing tooth. Materials and Methods: A cross-sectional study was performed where CBCT scans of the patients with a single missing tooth in the posterior segment of the mandible-premolar, I (1st) molar, and II (2nd) molar were used. The scans were assessed using OnDemand3D software (version 1.0; CyberMed Inc., Seoul, Korea) for localization of the MC asnd remaining alveolar bone both vertically (from the superior position of the MC to the crest of the alveolar ridge) and horizontally (buccolingual, 3 mm below the crest of the alveolar ridge). The findings were statistically analyzed using independent t-test. Results: A total of 120 mandibular sites (40 sites for each of the three missing premolar, I molar, and II molar) from 91 CBCT scans were analyzed. The average heights (from the alveolar crest to the superior margin of the MC) at the premolar, I molar, and II molar areas were $15.19{\pm}2.12mm$, $14.53{\pm}2.34mm$, and $14.21{\pm}2.23mm$, respectively. The average widths, measured 3 mm below the crest of the alveolar ridge, at the premolar, I molar, and II molar areas were $6.22{\pm}1.96mm$, $6.51{\pm}1.75mm$, and $7.60{\pm}2.08mm$, respectively. There was no statistically significant difference between males and females regarding the vertical and horizontal measurements of the alveolar ridges. Conclusion: In the study, the measurements were averaged separately for each of the single missing teeth (premolar, I molar, or II molar), giving more accurate information for dental implant placement.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2003년도 추계학술발표회초록집
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• pp.59-59
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• 2003

In recent, various functional coatings on artificial tooth implants have been conducted to enhance the bonding strength between implants and bones. Despite of these efforts, some previous reports argued that an adhesion strength between titanium implant and the final coatings like hydroxyapatite(HA) is weaker than the strength between coating and bone. In order to increase the adhesion force between the final coating and implant surface, TiN/DLC based functionally graded coating, which has higher mechanical strength than the titanium implant, was applied as a middle layer between titanium implant and final coating. Particularly we finally coated a biocompatible hydroxyapatite film on the DLC layer and examined the mechanical properties. As a result, TiN/DLC based functionally graded coating showed the higher adhesion strength compared with hydroxyapatite single layer coating on the titanium implant.

• 구강회복응용과학지
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• 제33권3호
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• pp.223-229
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• 2017

단일 치아의 인상채득을 위해서는 바이트 트레이를 이용한 폐구인상법이 선호된다. 그러나 임플란트 인상채득을 위해서는 단일치와 다수치 구분 없이 편악 트레이를 이용한 개구인상법이 주로 사용되고 있다. 바이트 트레이를 이용하는 폐구인상법은 시간이 절약되고 재료가 적게 들며, 모형의 교합기 부착 시 상하악 악간 위치 관계 오차 발생 확률이 적다. 본 증례에서는 2 가지 종류의 폐구인상용 코핑을 이용해 바이트 트레이로 인상채득 후 단일 임플란트 고정성 보철물을 제작함에 있어 만족할 만한 결과를 얻어 보고하고자 한다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권1호
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• pp.39-47
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• 2005

The purpose of this study is to review the prognosis of the TG Osseotite implant(3i Co, USA) placed in partial edentulous area of oral cavity and to suspect the possible causes leading to failure. 124 TG Osseotite implants that had been inserted between 2000 - 2002 were followed up for 2 years(avg : 9.5 months) in function. Medical records, and radiographs were evaluated and analyzed by the over all success rate, gender and age factor, general disease, implant fixture length and diameter, implant site, bone density, and various surgical methods. Chi square test was used statistically. Of the 124 TG Osseotite implants, 9 implants(7.3%) were removed in early phase and 3 implants(2.4%) were in late phase. The cumulative survival rate was 90.2%. The failure of the TG Osseotite implant was closely related with the use of bone graft techniques such as sinus elevation or immediate implantation and not with the age, sex, general disease, implant site, bone density of implanted site. The failure of the TG Osseotite implant was well developed when it was the wide type of implant and it was inserted for single tooth replacement. The developement of peri-implantitis was the most important factor in the failure of the TG Osseotite implant.

• 대한치과기공학회지
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• 제40권2호
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• pp.63-69
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• 2018

Purpose: The purpose of this study is to investigate the non-precious metal core materials used in the dental laboratory to fabricate the implant superstructure by CAD / CAM method. And to observe and compare the morphology and distribution of the osteoblasts in relation to implant osseointegration. Methods: In this study, the mandibular right first molar tooth model was selected as an international standard to produce a single core. Using this model, the impression was made with the silicone rubber, the tooth model was scanned, and a single core was designed and 5-axis milling was performed. The materials used were Cobalt-Chromium and Nickel-Chromium, and the cores for dental implant top structures were fabricated according to the procedures of the dental labs. After the fabrication, the marginal area of the core was separated and cell culture experiment was performed. The osteoblast cells used MC3T3-E1, which is currently widely used. For morphological analysis of osteoblasts, cells were posttreated and observed using CLSM (Confocal Laser Scanning Microscope) and compared. Results: The cell adhesion behavior of the specimen surface measured by CLSM was uniformly distributed in specimen A (Cobalt-Chromium) than in specimen B (Nickel-Chromium). The distribution and changes of the cells were different in the two specimens. Conclusion : It is possible to confirm that specimen A (Cobalt-Chromium) is suitable for the living body through adhesion and proliferation of osteoblasts related to implant osseointegration in the non-precious metal superstructure used after implantation. It is considered that it is preferable to use Co-Cr when fabricating the superstructure.

• 대한치과교정학회지
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• 제44권4호
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• pp.217-225
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• 2014

Single-tooth implantation has become a common treatment solution for replacement of a root-fractured maxillary incisor in adults, but the long-term esthetic results can be unfavorable due to progressive marginal bone loss, resulting in gingival recession. In this case report, a maxillary central incisor with a root fracture in its apical one-third was orthodontically extruded and extracted in a 21-year-old female. Implant surgery was performed after a 3-month healing period, and the final crown was placed about 12 months after extraction. After 12 years, favorable osseous and gingival architectures were visible with adequate bone height and thickness at the buccal cortical plate, and no gingival recession was seen around the implant-supported crown. Although modern dentistry has been shifting toward simplified, clinical procedures and shorter treatment times, both general dentists and orthodontists should be aware of the possible long-term esthetic advantages of orthodontic extrusion of hopelessly fractured teeth for highly esthetically demanding areas and should educate and motivate patients regarding the choice of this treatment solution, if necessary.

• 대한치과보철학회지
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• 제51권4호
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• pp.252-260
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• 2013

연구 목적: 치과 임플란트가 소개된 이후로 단일 치아 상실에 따른 임플란트 수복에 관한 성공적인 연구 결과들이 보고되고 임상적으로도 널리 사용되고 있다. 구강내의 다양한 부위에 따른 연구들이 있어 왔으나, 교합력이 강한 구치부 특히 하악 구치부에서 단일 임플란트에 관한 연구가 필요할 것이다. 본 연구는 하악의 제1대구치와 제2대 구치 부위에 식립된 단일 임플란트의 생존율에 관해 연구, 분석하였다. 연구 대상 및 방법: 2002년부터 2009년까지 대구광역시 소재의 7개 치과의원에서, 하악 제1, 2대구치에 단일 임플란트 치료를 받은 환자 284명에게 식립된 308개의 임플란트를 대상으로 하였다. 하악 제1대구치에 168개의 임플란트가 식립되었고, 하악 제2대구치에 140개의 임플란트가 식립되었다. 이들 임플란트는 식립위치, 환자의 성별, 연령, 임플란트의 직경 및 길이에 따라 분석하였다. 결과:하악 제1대구치에서는 4개의 임플란트가, 하악 제2대구치에서는 10개의 임플란트가 실패하였다. 하악 제1대구치에서는 97.6%, 하악 제2대구치에서는 92.9%의 성공률을 나타내었다. 환자의 연령, 성별, 식립방법, 임플란트의 직경 등에 따른 차이는 관찰할 수 없었다. 결론: 하악 제1대구치 단일 임플란트의 생존율은 하악 제2대구치 단일 임플란트의 생존율보다 높게 나타났다. 이는 하악 제2대구치 부위의 골질이 좋지 않고, 하악의 해부학적인 구조로 인해 하악 제2대구치 부위에 과도한 교합력이 가해질 우려가 있기 때문이라 생각된다.

• 대한치과보철학회지
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• 제62권2호
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• pp.146-156
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• 2024

임플란트 보조 국소의치의 치료는 오래전부터 여러 형태로 시도되어 왔으며, 이 중 임플란트 서베이드 크라운 국소의치의 경우 점차 예지성을 얻고 있으며, 특히 경제적, 해부학적으로 불리한 부분 무치악 환자에게 한 가지 치료 방법이 될 수 있다. 이때 임플란트의 식립 위치는 치료 목적에 따라 전방 식립과 후방 식립으로 분류될 수 있는데, 이는 환자의 치조제, 잔존치 예후, 대합치 등 여러 상황을 고려하여 결정되어야 한다. 본 증례에서는 하악 Kennedy 1급 부분 무치악 환자에게 두 개의 임플란트 서베이드 크라운을 활용한 하악 임플란트 보조 국소의치를 통해 수복하였다. 본 환자에게 후방 식립이 어렵다는 점과 잔존치의 예후를 고려하여 임플란트를 잔존치에 근접한 부위에 두 개를 식립하는 것이 계획되었으며, 가이드 수술을 통해 계획한 위치, 각도, 깊이에 식립되었다. 고정성 보철물 제작 과정은 상악 무치악 치아 배열 과정과 병행하여 예지성을 높였고, 국소의치를 제작 시에는 임플란트가 최후방 지대치로서 과도한 하중이 가하지 않도록 기능 운동을 허용하는 형태로 디자인되고, 이차 인상 과정을 거쳐 제작되었다. 각 치료 과정을 계획한대로 진행하여 환자와 술자 모두 심미적, 기능적으로 만족스러운 결과를 얻었기에 이를 보고하는 바이다.

• Journal of Periodontal and Implant Science
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• 제38권2호
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• pp.207-214
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• 2008

Purpose: The aim of augmentation of the alveolar ridge is to restore absorbed alveolar ridges for future implant site or esthetic prosthodontic restoration. The present clinical report describes the anterior maxillary augmentation cases using a soft tissue rotated palatal flap, and considers various problems of before and after surgery. Method: First & second patients were treated by vascularized interpositional periosteal-connective tissue(VIP-CT) flap for horizontal soft tissue augmentation. Especially second patient was progressed with bone grafting at the same time. Third patient was treated by the same flap with bone graft and implant placement in single tooth missing premaxillary area. Result: The obtained horizontal augmentation width measured $0.5{\sim}2.7\;mm$. Conclusion: This technique constitutes a viable approach for augmentation the anterior sector of alveolar ridge with the placement of dental implants. But it needs correct diagnosis preparation and careful surgery skill.