• Original Article

    Comparison of Reproducibility of Milled Acrylic Resin and Zirconia Models for 3-unit bridge Using Three-dimensional Analysis

    밀링 방법으로 제작한 레진과 지르코니아 3본 브릿지 모델의 3차원 분석을 이용한 재현성 비교

    Gang-Seok Park, Seong-Kyun Kim, Seong-Joo Heo, Jai-Young Koak, Ji-Man Park, Jin-Soo Ahn, Deog-Gyu Seo

    박강석, 김성균, 허성주, 곽재영, 박지만, 안진수, 서덕규

    Purpose: The objective of this study was to investigate the reproducibility of milled acrylic resin and zirconia models using three-dimensional analysis. Material ... + READ MORE
    Purpose: The objective of this study was to investigate the reproducibility of milled acrylic resin and zirconia models using three-dimensional analysis. Material and Methods: Zirconia discs and acrylic resin blocks were milled to make models. Each model was scanned with a model scanner. The zirconia models were superimposed with other zirconia model, and the acrylic resin models were superimposed with other acrylic resin model threedimensionally. Root-mean-square (RMS) values were obtained. Distances between two superimposed models were measured. Statistical significances were tested using the Mann-Whitney U test and t-test. Results: The RMS values of the zirconia model and the acrylic resin model were not significantly different (p ≥0.05). At the premolar site, distances between the zirconia models at the upper axial and at the lower axial wall were significantly smaller than for the acrylic resin models (p <0.05). At the molar site, distance between the zirconia models at the lower axial wall was significantly smaller than for the acrylic resin models (p <0.05). Conclusion: Although there is a difference in reproducibility between the milled acrylic resin model and the zirconia model in the localized region, no significant difference was found in the whole model. - COLLAPSE
    September 2018
  • Clinical or Case Report

    Monolithic Zirconia Implant Restorations using CAD/CAM Double Scanning

    CAD-CAM Double Scanning 을 이용한 단일 구조 지르코니아 임플란트 보철수복: 증례보고

    Hyun-Ji Hwang, Eun-Jin Park, Young-Eun Cho

    황현지, 박은진, 조영은

    Alongside the development of digital devices and materials, the concept of digital dentistry has been advancing throughout the field of prosthetic dentistry. ... + READ MORE
    Alongside the development of digital devices and materials, the concept of digital dentistry has been advancing throughout the field of prosthetic dentistry. Patients with missing teeth often visit dental clinics in a functionally and esthetically disrupted state. Provisional restorations play an important role in setting the patient-specific information, such as the position and alignment of teeth for esthetics, pronunciation, lip support, vertical dimension and occlusal plane. In conventional methods, there are many difficulties in reflecting provisional prosthesis to final restorations. However, with the double scanning method, which is a process of superimposing and replicating scanned models of provisional prosthesis on a definitive model, it is easier to reflect provisional restorations to final ones. It also has the advantages of simplifying the manufacturing process, and making it possible to reproduce the same prosthesis when it has been fractured or lost. In this case report, two patients went through a provisional restoration phase to evaluate function and esthetics. The final monolithic zirconia implant restorations were fabricated using the double scanning method. These cases are presented to show that with CAD/CAM technology and double scanning method, it is possible to fabricate an esthetic and functional final restoration that reflects the provisional restoration. - COLLAPSE
    September 2018
  • Clinical or Case Report

    Implant Placement of Severe Alveolar Bone Resorption Site with Oroantral Fistula: A Case Report

    구강 상악동 누공 동반한 심한 치조골 흡수부위 임플란트 식립: 증례보고

    Kuk-Won Jang, Hee-Sung Hawng, Chul-Hun Kim, Bok-Joo Kim, Jung-Han Kim, Moo-Sung Kim, Do-Hee Kim

    장국원, 황희성, 김철훈, 김복주, 김정한, 김무성, 김도희

    Introduction: Patients with oroantral fistula usually have severe alveolar bone defects. Alveolar bone augmentation procedure may be needed when placing implant in ... + READ MORE
    Introduction: Patients with oroantral fistula usually have severe alveolar bone defects. Alveolar bone augmentation procedure may be needed when placing implant in atrophic bone. Currently, various alveolar bone augmentation techniques are recognized as promising treatments. The purpose of this study is to evaluate the results of simultaneously performed sinus augmentation, guided bone regeneration (GBR) and block bone graft procedures in patient who have the severe alveolar bone loss with oroantral fistula. Case: A 58-year-old male patient was referred for implant removal at #15, 16 intruded in the right maxillary sinus. At first, implant fixture was removed and, #14 was extracted. After 7 months, combination technique including sinus augmentation & block bone graft & GBR was carried out. Sinus augmentation was performed by the lateral approach. The bone block harvested from the mandibular ramus was performed. The bone block is placed on the alveolar bone and fixed with a screw to the alveolar bone with GBR. At 7 months after bone augmentation, Implants were placement at the #14, 16, 17 edentulous site. After implantation 6 months, implant second operation was done. And the prosthetic procedure was completed. Conclusion: Healing occurs without complications and at 9 months follow-up check, normal clinical and radiological findings were observed. - COLLAPSE
    September 2018
  • Review Article

    Possibility and Limitation of Applying Occlusal Adjustment on Implant Prosthesis similar to Natural Teeth

    임플란트 고정성 보철물에서 자연치와 비슷한 교합형성법에 대한 가능성과 한계

    Bo-Seul Jeon, Seung-Kyun Kim, Jung-Jin Lee, Jae-Min Seo

    전보슬, 김승균, 이정진, 서재민

    Restoration with fixed prostheses using implants is a generalized treatment method in partially or fully edentulous patients. In the past, where only ... + READ MORE
    Restoration with fixed prostheses using implants is a generalized treatment method in partially or fully edentulous patients. In the past, where only the function of the implant prostheses was emphasized, successful osseointegration was just enough to be considered clinically satisfactory. Recently, however, as the patient’s demands have increased, the recovery of function and esthetics similar to the lost natural teeth has become an important issue for implant prostheses restoration. There may be controversy as to whether occlusion of natural teeth can be applied to implants with different morphological, histological, and dynamical characteristics from those of natural teeth. Therefore, this article will investigate the possibility, prerequisites, limitations and solutions of implant occlusion formation similar to natural teeth. - COLLAPSE
    September 2018
  • Review Article

    Peri-implant Disease: Etiological Factors and Microbiological Approaches

    임플란트 주위 질환: 원인 요소 및 미생물학적 접근

    Hyun Ju Kim, Kyoung-Hwa Kim, Yong-Moo Lee, Young Ku, In-Chul Rhyu, Yang-Jo Seol

    김현주, 김경화, 이용무, 구 영, 류인철, 설양조

    Peri-implant disease has been defined as an inflammatory process affecting the hard and/or soft tissues surrounding an implant in function. The major ... + READ MORE
    Peri-implant disease has been defined as an inflammatory process affecting the hard and/or soft tissues surrounding an implant in function. The major etiological factors of peri-implantitis are pathogenic microorganisms, which are very similar to the bacterial flora related to the periodontitis. It has been reported that orange complex and red complex microorganisms were highly associated with the development of periodontitis and lots of studies revealed that these were associated with the peri-implantitis as well. However, it is often reported that some other microorganisms not regarded to be related with the periodontitis are recently observed around the implants having the peri-implantitis. The purpose of this article is to describe the etiological factors and to review updated knowledge studied with microbiological approaches hoping to help clinicians to prevent, diagnose or treat the peri-implant disease. - COLLAPSE
    September 2018