Song Young Woo, Yoo Seung Ha, Park Jin-Young, Cha Jae-Kook, Paik Jeong-Won, Lee Jung-Seok, Thoma Daniel S, Jung Ui-Won
Department of Periodontology, Dental Hospital, Veterans Health Service Medical Center, Seoul, Korea.
Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, Korea.
J Periodontal Implant Sci. 2025 Apr;55(2):153-166. doi: 10.5051/jpis.2401100055. Epub 2024 Nov 13.
This study retrospectively investigated the long-term clinical and radiographic outcomes of a bone-level type, 2-piece, internal connection dental implant system characterized by coronal microthreads.
A total of 872 implants placed in 284 patients were selected from 1,845 implants placed in 691 patients by experienced periodontists at Yonsei University Dental Hospital. These selected implants had been followed up for over 10 years and were included in the present study. A statistical evaluation of implant survival and treatment success, based on changes in marginal bone levels, was conducted using electronic records and consecutively taken radiographs.
Over a follow-up period of 12.3±2.0 years, 830 of the 872 implants remained intact, yielding a cumulative survival rate of 95.2% at the implant level and 88.4% at the patient level. The cumulative treatment success rates, characterized by marginal bone loss of less than 2 mm, stood at 87.0% for implants and 76.1% for patients. Among the 830 surviving implants, 113 fixtures were classified as ailing, with an average marginal bone loss of 4.09±1.44 mm. Cox regression analysis revealed that implants 8 mm in length or shorter were significantly more likely to fail or experience pathologic marginal bone resorption, with hazard ratios of 3.71 and 2.00, respectively (<0.05).
The survival and treatment success of the investigated microthreaded, bone-level, 2-piece, internal connection implants were acceptable over a follow-up period exceeding 10 years. However, shorter dental implants exhibited a higher propensity for failure and excessive marginal bone loss.
本研究回顾性调查了一种具有冠部微螺纹的骨水平型、两件式、内部连接牙科种植体系统的长期临床和影像学结果。
从延世大学牙科学院经验丰富的牙周病医生为691例患者植入的1845颗种植体中，选取了为284例患者植入的872颗种植体。这些选定的种植体已随访超过10年，并纳入本研究。基于边缘骨水平的变化，使用电子记录和连续拍摄的X线片对种植体存活情况和治疗成功率进行了统计评估。
在12.3±2.0年的随访期内，872颗种植体中的830颗保持完好，种植体水平的累积存活率为95.2%，患者水平为88.4%。以边缘骨丢失小于2mm为特征的累积治疗成功率，种植体为87.0%，患者为76.1%。在830颗存活的种植体中，113颗种植体被归类为状况不佳，平均边缘骨丢失为4.09±1.44mm。Cox回归分析显示，长度为8mm或更短的种植体显著更易失败或发生病理性边缘骨吸收，风险比分别为3.71和2.00（<0.05）。
在超过10年的随访期内，所研究的微螺纹、骨水平、两件式、内部连接种植体的存活情况和治疗成功率是可以接受的。然而，较短的牙种植体表现出更高的失败倾向和过度的边缘骨丢失。
