Papi Piero, Jamshir Sara, Brauner Edoardo, Di Carlo Stefano, Ceci Antonio, Piccoli Luca, Pompa Giorgio
Department of Oral and Maxillo-Facial Sciences, "Sapienza" University of Rome, Italy.
Ann Stomatol (Roma). 2015 Feb 9;5(4):136-41. eCollection 2014 Oct-Dec.
The aim of this study is to present 18 months follow-up results of porous tantalum trabecular metal-enhanced titanium dental implant (PTTM) in implant supported prosthesis in post-oncological patients.
A total of 25 PTTM implants were placed in each jaw of 6 patients that met specific inclusion and exclusion criteria. Resonance Frequency Analysis (RFA) was conducted and Implant stability was recorded in ISQ values (Osstell ISQ, Osstell AB, Goteborg, Sweden) at implant placement and after 2,4,6,12 and 18 months of functional loading. Mean bone loss was also evaluated at the same interval of time on each periapical radiographs, bone levels were calculated by measuring the distance from the implant shoulder to the first bone to implant contact.
Cumulative implant survival rate is 100% (n=25/25) to date and mean ISQ values recorded were: 72.14±5.61 (range= 50-81) at surgery, 64.39±8.12 (range=44-74) after 2 months, 74.26±7.14 (range=44-74) after 4 months, 76.84±7.65 (range=60-83) after 6 months, 78.13±4.14 (range=64-84) after 12 months and 80.22±6.23 (range=68-89) after 18 months of functional loading. Mean crestal marginal bone loss was 0.19±0.25 mm after 2 months of functional loading on periapical radiographs, 0.22±0.4 mm at 4 months, 0.3±0.46 mm at 6 months, 0.57±0.62 at 1 year and 0.64±0.60 mm after 18 months.
The results of this study, even if limited by the number of implants placed indicate that PTTM dental implants have a clinical efficacy in prosthetic rehabilitation of post-oncological patients, due to trabecular structure of the porous Ta metal that increases bone-implant connection values.
本研究旨在呈现多孔钽小梁金属增强型钛牙种植体（PTTM）在肿瘤患者种植支持修复体中的18个月随访结果。
在6例符合特定纳入和排除标准的患者的每侧颌骨中植入25枚PTTM种植体。进行共振频率分析（RFA），并在种植体植入时以及功能负荷2、4、6、12和18个月后记录种植体稳定性的ISQ值（Osstell ISQ，Osstell AB，瑞典哥德堡）。在相同时间间隔内，通过根尖片评估平均骨丢失情况，通过测量从种植体肩部到首次骨与种植体接触的距离计算骨水平。
迄今为止，种植体累积存留率为100%（n = 25/25），记录的平均ISQ值为：手术时72.14±5.61（范围 = 50 - 81），2个月后64.39±8.12（范围 = 44 - 74），4个月后74.26±7.14（范围 = 44 - 74），6个月后76.84±7.65（范围 = 60 - 83），12个月后78.13±4.14（范围 = 64 - 84），功能负荷18个月后80.22±6.23（范围 = 68 - 89）。根尖片显示，功能负荷2个月后平均嵴顶边缘骨丢失为0.19±0.25 mm，4个月时为0.22±0.4 mm，6个月时为0.3±0.46 mm，1年时为0.57±0.62，18个月后为0.64±0.60 mm。
本研究结果虽受种植体植入数量限制，但表明PTTM牙种植体在肿瘤患者的修复重建中具有临床疗效，这归因于多孔钽金属的小梁结构增加了骨 - 种植体连接值。
