• Original Article

    Effect of Glycemic Control on the Incidence of Dental Implant Complications in Diabetic Patients
    Sung-Wook Chae, Young-Sung Kim, Won-Kyung Kim, Young-Kyoo Lee, Su-Hwan Kim
    Purpose: This retrospective cohort study aimed to explore the impact of glycemic control on the survival of dental implants and the rates … + READ MORE
    Purpose: This retrospective cohort study aimed to explore the impact of glycemic control on the survival of dental implants and the rates of post-loading complications in patients with well to fairly well-controlled diabetes. Although diabetes is acknowledged as a relative risk factor for dental implants, few studies have investigated the incidence of complications or implant survival in individuals with treated diabetes. Materials and Methods: A total of 128 patients with 347 implants were enrolled. Patients and implants were grouped into two categories based on glycated hemoglobin (HbA1c) values in the pre- or postoperative period within two months: < 7% (well-controlled group) and 7% to < 9% (fairly well-controlled group). Comparative analyses included cumulative survival rates (CSR) and the occurrence of biological and technical complications between the two HbA1c levels.Results: After six years, implant survival was 98.0% in the well-controlled group and 98.8% in the fairly well-controlled group, with no statistically significant difference observed between the two groups (p = .853). The higher HbA1c level group exhibited a greater incidence of soft tissue complications than the lower HbA1c level group (p < .005).Conclusion: Implant therapy demonstrates predictability and satisfactory survival rates in patients with controlled diabetes. However, individuals with higher glycemic levels are more susceptible to soft tissue complications and bone loss following implant therapy. - COLLAPSE
    31 December 2023
  • Original Article

    Implant Surface Changes Observed with Confocal and Electron Microscopy After Probing with Metal and Plastic Periodontal Probes
    Seong-Ho Jin, Jun-Beom Park, Joowan Son, Youngkyung Ko
    Purpose: Probing around dental implants is recommended for the monitoring of peri-implant tissue health, but there are some risks associated with this … + READ MORE
    Purpose: Probing around dental implants is recommended for the monitoring of peri-implant tissue health, but there are some risks associated with this procedure. There is a paucity of concrete evidence that contact with periodontal probes may leave remnants or indentations on the implant surface. The objective of this study was to provide visual evidence of the effects of probing around a rough-surface implant with metal and plastic periodontal probes, as assessed by confocal and scanning electron microscopy.Materials and Methods: Rough surface implants were placed in a pig mandible to simulate 8 mm of peri-implant bone loss. Probing around the entire circumference of the implants was performed using a metal and a plastic periodontal probe. Surface analysis was performed using confocal and scanning electron microscopy.Results: Confocal microscopy showed plastic remnants left on the thread peaks of the implant. Scanning electron microscopy showed smoothening of the sandblasted and acid-etched implant after probing.Conclusion: Contact with a periodontal probe leads to changes in the surface of rough-surface implants. The use of plastic probes may leave plastic remnants on the implant surface. - COLLAPSE
    31 December 2023
  • Original Article

    Comparative Analysis of Pre-formed 3D-Printed PCL/β-TCP Membrane Versus Collagen Membrane for Guided Bone Regeneration: A Preliminary Pilot Study
    Subramanian Keerthana, Jae-Hun Kim, Hyun-Wook An, Jin-Hyung Shim, Jae-Hong Lee, Jeong-Ho Yun
    Purpose: This study aimed to assess and compare the effectiveness of 3D-printed pre-formed resorbable polycaprolactone/β-tricalcium phosphate (PCL/β-TCP) membrane and collagen membrane, combined … + READ MORE
    Purpose: This study aimed to assess and compare the effectiveness of 3D-printed pre-formed resorbable polycaprolactone/β-tricalcium phosphate (PCL/β-TCP) membrane and collagen membrane, combined with demineralized bovine bone mineral (DBBM), for guided bone regeneration (GBR) for peri-implant dehiscence defects. Materials and Methods: Twelve patients underwent GBR using either a PCL/β-TCP membrane with DBBM (PM group) or a collagen membrane with DBBM (CM group). Clinical assessments, including measurements of vertical defect height and width after implant placement (baseline) and re-entry surgery, were conducted. Cone-beam computed tomography imaging was performed to measure the augmented horizontal bone width (HW0, HW2, and HW4 at 0, 2, and 4 mm apical to the implant shoulder), vertical thickness (VT), and VT at a 45° angle (VT-45) at both time points. Results: No adverse effects, such as soft tissue dehiscence, membrane exposure, or severe postoperative complications, were observed during the healing period. The mean reductions in the defect height and width were 89% and 80% in the PM group and 73% and 71% in the CM group, respectively. The horizontal bone width and vertical thickness between the two groups were statistically significant (p < .05) at HW0, VT, and VT-45, both at baseline and re-entry surgery. Meanwhile, the changes in bone augmentation between baseline and re-entry surgeries were not significantly different (p > .05) between the two groups. Conclusion: Based on the findings of this study, pre-formed resorbable 3D-printed PCL/β-TCP membrane with DBBM could be an effective treatment option for peri-implant dehiscence defects, providing stability and vertical and horizontal bone augmentation. - COLLAPSE
    31 December 2023
  • Clinical or Case Report

    Zirconia Abutment Fracture in the Anterior Region: Case Series
    Ha Young Roh, Re-Mee Doh
    This case report examines the cause of zirconia abutment fracture in implant treatments. Two patients who experienced a fracture of a maxillary … + READ MORE
    This case report examines the cause of zirconia abutment fracture in implant treatments. Two patients who experienced a fracture of a maxillary incisor received a titanium base implant with zirconia custom abutments. Fractures were observed at the cervical area of the connection of the titanium base and zirconia abutment. Six causes of fracture were analyzed for each of the two cases including manufacturing defects of zirconia blocks, thin sidewall thickness of zirconia, strong internal stress, implant angulation, concentration of excessive stress according to occlusal aspect, adhesion problem of titanium base, and zirconia abutment. - COLLAPSE
    31 December 2023
  • Clinical or Case Report

    Metastasis of Lung Adenocarcinoma Around Mandibular Dental Implant: A Clinical Case Report
    Taek-Geun Jun, Sehyun Choi, Sang-Hoon Kang
    Malignant tumors of extra-oral origin rarely metastasize to the oral cavity. Here we report the metastasis of a lung adenocarcinoma around a … + READ MORE
    Malignant tumors of extra-oral origin rarely metastasize to the oral cavity. Here we report the metastasis of a lung adenocarcinoma around a mandibular dental implant that was misdiagnosed as peri-implantitis. - COLLAPSE
    31 December 2023
  • Clinical or Case Report

    A Case of Implant Installation at Sinus Septa Using Sinus Crestal Approach: A 7-year Follow-up
    Jun-Hyeong Kong, Hyeon-Seong Ahn, Hieu Pham Duong, Sung-Jo Lee
    Minimal bone height for sinus crestal approach at upper molar site for implant placement was more than 5 mm. When the septum … + READ MORE
    Minimal bone height for sinus crestal approach at upper molar site for implant placement was more than 5 mm. When the septum was located at implant installation site, it had a risk of membrane perforation. However, it was useful for initial fixation due to its high bone density. A 54-year-old patient had a septum at left upper 1st molar site. Implant installation was performed using sinus crestal approach using the fixing force of the septum. The 7-year follow-up revealed that the bone and implant conditions were maintained without any complications. - COLLAPSE
    31 December 2023
  • Clinical or Case Report

    Management of Early Implant Failure Associated with A Remnant: A Case Report
    Jungwon Lee, Dongseob Lee, Young-Chang Ko, Jungwoo Jung, Seunghee Lee, Yong-Moo Lee
    Implant restoration, a predictive procedure for edentulous areas, can suffer from early failure due to several factors. While thorough debridement of the … + READ MORE
    Implant restoration, a predictive procedure for edentulous areas, can suffer from early failure due to several factors. While thorough debridement of the extraction socket is standard practice for implant placement, unintentional remnant can occur. This case report presents an early implant failure following placement and guided bone regeneration. Radiological examination revealed radiopaque material around the implant, prompting material removal and subsequent biopsy. The histological analysis identified the area surrounding the bone material as granulation tissue containing chronic inflammatory cells, while the hard tissue area exhibited hypercementosis or periapical cemento-osseoeous dysplasia. These findings suggest unintentional placement of the implant into a remnant following the previous extraction. This case highlights the importance of thorough debridement after tooth extraction. Moreover, pre-implant placement radiological evaluation is necessary to avoid implant failure associated with unintentionally retaining lesion. - COLLAPSE
    31 December 2023