Poli Pier Paolo, Manfredini Mattia, Maiorana Carlo, Salina Federica E, Beretta Mario
Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy.
Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Dental Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy.
J Clin Med. 2023 Aug 3;12(15):5098. doi: 10.3390/jcm12155098.
The present pilot study was designed by hypothesizing a possible correlation between lack of accuracy in implant placement and peri-implant hard and soft tissue health. A total of five patients underwent computer-guided implant surgery and full-arch immediate loading between 2013 and 2014. They subsequently underwent postoperative cone-beam computed tomography (CBCT). After a follow-up of 5 years, all patients were recalled for a clinical-radiographic evaluation of peri-implant health status. The mean linear deviation was 0.5 ± 0.2 mm at the implant's head and 0.6 ± 0.2 mm at the implant's apex, while the mean angular deviation of the long axis was 2.8° ± 1.2°. A mean marginal bone loss (MBL) of 1.16 ± 0.94 mm and 2.01 ± 1.76 mm was observed after 1 and 5 years of follow-up, respectively. At 5 years, the mean peri-implant probing depth (PPD) was 4.09 ± 1.44 mm, 66.6% of the evaluated implants showed peri-implant bleeding on probing (BOP), keratinized mucosa (KM) was <2 mm in 48.4% of cases, and mucosal recession (REC) ≥ 1 mm was assessed in 45.4% of the included implants. A negative correlation was observed between bucco-palatal/lingual linear inaccuracy and MBL, PPD, BOP, and KM.
本前瞻性研究旨在通过假设种植体植入位置不准确与种植体周围软硬组织健康之间可能存在的相关性来进行设计。2013年至2014年期间，共有5名患者接受了计算机引导下的种植手术和全牙弓即刻负重。随后，他们接受了术后锥形束计算机断层扫描（CBCT）。经过5年的随访，所有患者均被召回，对种植体周围健康状况进行临床影像学评估。种植体头部的平均线性偏差为0.5±0.2mm，种植体根尖的平均线性偏差为0.6±0.2mm，而长轴的平均角度偏差为2.8°±1.2°。随访1年和5年后，平均边缘骨吸收（MBL）分别为1.16±0.94mm和2.01±1.76mm。5年后，种植体周围平均探诊深度（PPD）为4.09±1.44mm，66.6%的评估种植体探诊时有种植体周围出血（BOP），48.4%的病例角化黏膜（KM）<2mm，45.4%的纳入种植体评估有黏膜退缩（REC）≥1mm。观察到颊腭侧/舌侧线性不准确度与MBL、PPD、BOP和KM之间存在负相关。
