• Original Article

    Clinical Precautions for Implant Placement using Computer-guided Implant Surgical Guide: A Systematic Review
    Jae-Hwi Bae, Su-Young Lee
    Purpose: The purpose of this study was to review the literature related to implant deviations that may occur when using a computer-guided … + READ MORE
    Purpose: The purpose of this study was to review the literature related to implant deviations that may occur when using a computer-guided implant surgical guide and to consider clinical precautions to reduce these deviations when placing implants using a computer-guided implant surgical guide.Materials and Methods: Articles published between 2010 and 2020 were searched in PubMed according to custom criteria. The selected articles were classif ied according to the cause of the deviation, and the degree of the deviation was analyzed.Results: Twelve articles were included based on the selection criteria. During implant surgery using a computer-guided implant surgical guide, various implant deviations were observed depending on the implant location, sleeve, drill, implant system, residual teeth, and 3D printer type.Conclusion: Deviations in implant placement can occur even when computer-guided implant surgical guide are used. It is necessary to recognize the possibility of implant deviations occurring according to various clinical situations and attempt to reduce these deviations. - COLLAPSE
    31 December 2021
  • Original Article

    A Retrospective Study on the Factors Affecting the Early Marginal Bone Loss of Tissue-Level Implants
    Seong-Mo Koo, Dae-Young Kang, Pham-Duong Hieu, Hyun-Seung Shin, Jung-Chul Park
    Purpose: Marginal bone loss (MBL) around dental implants adversely affects long-term implant treatment outcomes. The purpose of this study was to investigate … + READ MORE
    Purpose: Marginal bone loss (MBL) around dental implants adversely affects long-term implant treatment outcomes. The purpose of this study was to investigate the risk factors of MBL in tissuelevel implants.Materials and Methods: The study included 42 patients with 69 tissue-level implants placed between May 2015 and January 2020 at the Department of Periodontology of Dankook University Dental Hospital. Patient and implant data were collected f rom medical records and panoramic and periapical radiographs. MBL was measured as the distance f rom the apex of the implant fixture to the most coronal point where the implant and bone meet, and calibration was performed using the actual length of the implant. Student’s t -test was used to compare the groups by age (< 60 or ≥ 60 years), sex (male or female), hypertension status, diabetes status, implant diameter (< 5.0 or 5.0 mm), implant length (7.0 or ≥ 8.5 mm), position of implants (maxilla or mandible), collar height (≤ 2.0 or 2.8 mm), splinted implant prosthesis, and bone graf ting on MBL. One-way ANOVA was used to compare the MBL of the three groups by implant insertion depth less than 0.5 mm, between 0.5 to 1.0 mm, and more than 1.0 mm. The chi-square test for linear trend was used to determine whether the implant insertion depth affected the thread exposure.Results: There was no statistically significant difference between the groups in terms of sex, age, hypertension, diabetes, diameter, length, location, collar height, splinted implant prosthesis, and bone graf ting. One-way ANOVA showed that the MBL was signif icantly higher in the group with implant insertion depth ≥ 1.0 mm than in the other groups. However, the f requency of thread exposure decreased as the implant insertion depth increased.Conclusion: There were no statistically significant factors associated with MBL, except for implant insertion depth. As the implant insertion depth increased, the amount of MBL increased, but the f requency of thread exposure decreased. - COLLAPSE
    31 December 2021
  • Original Article

    Use of Porcine-derived Block Bone Substitutes for Guided Bone Regeneration in the Peri-implant Dehiscence Defects of the Mandibular Anterior Region
    Jae-Hong Lee, Seong-Nyum Jeong
    Purpose: Various bone graf t materials are currently used for guided bone regeneration (GBR), but data are lacking on the superiority of … + READ MORE
    Purpose: Various bone graf t materials are currently used for guided bone regeneration (GBR), but data are lacking on the superiority of one biomaterial relative to the other. In addition, achieving successf ul bone augmentation remains challenging. When used in GBR, block bone substitutes show better augmentation stability of the bone than particulated bone substitutes. Recently developed sof ttype block bone substitutes are widely used in clinical practice.Materials and Methods: This study enrolled 12 patients who underwent implant placement with GBR in the mandibular anterior region between September 2016 and May 2021 in the Department of Periodontology, Daejeon Dental Hospital, Wonkwang University. GBR was performed using demineralized porcine bone mineral with 10% collagen (DPBM-C; LegoGraf t®) and a resorbable collagen membrane (Bio-Gide® or Ossix Plus®). The surgical site was sutured with 4-0 e-PTFE (Biotex®) and 5-0 nylon (Monosof®) by using modified horizontal mattress and interrupted suture methods. Stitch-out was perf ormed two weeks af ter the operation, and reentry surgery was performed within four to six months af ter the implant surgery.Results: There was a significant decrease in bone thickness af ter five months of implant surgery with GBR compared with the decrease immediately af ter surgery. However, bone gains of more than 1.5 mm were observed at all measurement sites compared with those at baseline.Conclusion: GBR perf ormed using demineralized porcine bone mineral with 10% collagen in combination with a resorbable collagen membrane is an effective and favorable treatment modality for peri-implant dehiscence defects in terms of clinical and radiographic outcomes during the healing period. - COLLAPSE
    31 December 2021
  • Clinical or Case Report

    A Clinical Report of the Tooth-Implant Associated Double Crown Denture by Placing Additional Implants
    Jun-Yeon Kim, Jin-Hyun Cho
    When partially edentulous patients are treated using removable partial dentures, the teeth used as abutments are critical for prosthesis success. However, for … + READ MORE
    When partially edentulous patients are treated using removable partial dentures, the teeth used as abutments are critical for prosthesis success. However, for patients with few remaining teeth, the prognosis of such abutment teeth supporting the clasp of removable partial dentures is of concern. In contrast, several studies have reported the success of treatments using double-crown prostheses for patients with few remaining teeth as periodontally compromised teeth can be used as abutments for double-crown dentures even when their prognosis is doubtf ul for removable partial dentures with clasps. This provides more options for treatment planning for partially edentulous patients with few remaining teeth. In this study, the patient was treated using a conus double-crown denture, where the inner and outer crowns were fabricated using a gold alloy. Af ter 12 years, a new prosthesis was planned due to loss of denture retention and extraction of an abutment tooth. For the new prosthesis, three additional implants were placed and the original abutment teeth with gold inner crowns, except for the one that was extracted, were maintained and were used as abutments for the new hybrid telescopic double crown denture using a f riction pin method. Although the opposing arch had natural teeth and fixed prostheses, the patient adapted well af ter denture delivery and was overall satisfied. - COLLAPSE
    31 December 2021
  • Clinical or Case Report

    Titanium Mesh for Bone Augmentation in Oral Implant Surgery
    Youngdeok Chee
    Bone augmentation should be performed to recover a sufficient amount of bone before implant placement at the site where a bone defect … + READ MORE
    Bone augmentation should be performed to recover a sufficient amount of bone before implant placement at the site where a bone defect occurs due to bone resorption caused by tooth extraction or periodontitis. Currently, bone augmentation through guided bone regeneration is widely used at the site of bone defects. However, af ter guided bone regeneration, the bone cannot maintain its shape when the procedure is performed at the site of a vertical bone defect. In such a case, bone augmentation f or the desired shape can be perf ormed using a titanium-reinf orced membrane or titanium mesh to maintain the space three-dimensionally and create a bone shape at the site of the vertical bone defect. Titanium mesh, with its superior mechanical properties, prevents the collapse of the shape at the bone transplantation site, and enhances the stabilization of the wound by maintaining the space, enhancing the eff ect of bone regeneration, and contributing to the morphological enhancement of the regenerated alveolar bone. In this case, af ter bone augmentation was performed using titanium mesh at the site where the bone defect was large or a vertical bone defect occurred, the implant was placed, which led to a good outcome. - COLLAPSE
    31 December 2021
  • Clinical or Case Report

    Management of Sinus Infection After Immediate Implant Placement with Sinus Lift (Lateral Approach): Case Report
    Sang-Chang Lee, Young-Min Shin
    This report describes the case of a patient who underwent acute sinus infection af ter dental implant placement with sinus lif t. … + READ MORE
    This report describes the case of a patient who underwent acute sinus infection af ter dental implant placement with sinus lif t. The implant was placed at the right maxillary second molar area, and the sinus lif t with lateral approach was performed. Af ter one week, acute sinusitis was caused in the right maxillary sinus. Af ter the fixture and infected material were removed, sinus irrigation, membrane repair, and implant placement were performed simultaneously. This article reports a complication by iatrogenic cause of a routinely performed dental implant procedure and discusses management of sinusitis occurring by membrane perforation. - COLLAPSE
    31 December 2021