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Abstract：
The aim of the current study was to retrospectively investigate the prevalence of peri-implant mucositis (PIM) and peri-implantitis (P) in a long-term follow-up (≥20 years) of implants with the same body design and body surface but different collar surfaces with laser-microtextured grooves (LMGSs) vs. no laser-microtextured grooves (no-LMGSs) in private practice patients. Furthermore, several patient-related, implant-related, site-, surgical-, and prosthesis-related potential disease risk factors were analyzed. A chart review of patients receiving at least one pair of implants (one with an LMGS and the other without LMGS) in the period 1993-2002 was used. Chi-square analysis was used to determine if a statistically significant difference between the investigated variables and PIM/P was present. Possible risk factors were statistically evaluated by a binary logistic regression analysis. A total of 362 patients with 901 implant-supported restorations (438 with LMGS and 463 no-LMGS) were included in the study. The cumulative survival rates of implants at 5, 10, 15, and 20 years were 98.1%, 97.4%, 95.4%, and 89.8%, respectively, for the LMGS group, and 93.2%, 91.6%, 89.5%, and 78.3% for the no-LMGS group. The difference was statistically significant at all timepoints (p < 0.05). In total, at the end of the follow-up period, 45.7% of patients and 39.8% of implants presented PIM, and 15.6% of patients and 14% of implants presented P. A total of 164 LMGS implants (37.4%) and 195 no-LMGS implants (42.1%) presented peri-implant mucositis, while 28 (6.3%) of LMGS implants and 98 (21.1%) no-LMGS implants demonstrated peri-implantitis. Differences between LMGS implants and no-LMGS implants were statistically significant (p < 0.05). The binary logistic regression identified collar surface, cigarette smoking, histories of treated periodontitis, and lack of peri-implant maintenance as risk factors for P. After at least 20 years of function in patients followed privately, LMGS implants compared to no-LMGS implants presented a statistically and significantly lower incidence of P. Implant collar surface, cigarette smoking, previously treated periodontitis, and lack of peri-implant maintenance are factors with significant association to P.
摘要：
本研究的目的是回顾性调查植入物周围黏膜炎（PIM）和植入物周围炎（P）的患病率，在长期随访（≥20年）中，植入物具有相同的身体设计和身体表面，但不同的领表面具有激光微纹理凹槽（LMGS）与私人执业患者没有激光微纹理凹槽（无LMGS）。此外，几个病人相关的，植入物相关，Site-,手术-，分析假体相关潜在疾病的危险因素。使用了1993-2002年期间接受至少一对植入物（一个带有LMGS，另一个没有LMGS）的患者的图表回顾。卡方分析用于确定所研究的变量和PIM/P之间是否存在统计学上的显著差异。通过二元逻辑回归分析对可能的危险因素进行统计学评估。研究共纳入362名患者，其中901个植入物支持的修复体（438个LMGS和463个无LMGS）。植入物在5、10、15和20年的累积生存率为98.1％，97.4%,95.4%,和89.8%，分别,对于LMGS集团来说，和93.2％，91.6%,89.5%,无LMGS组的比例为78.3%。所有时间点的差异均具有统计学意义(p<0.05)。总的来说,在随访期结束时，45.7%的患者和39.8%的植入物出现PIM，15.6％的患者和14％的植入物出现P。总共164个LMGS植入物（37.4％）和195个无LMGS植入物（42.1％）出现植入物周围粘膜炎，而28例(6.3%)LMGS植入物和98例(21.1%)无LMGS植入物出现种植体周围炎。LMGS植入物与非LMGS植入物之间的差异具有统计学意义（p<0.05）。二元逻辑回归识别领口表面，吸烟,牙周炎治疗史，缺乏种植体周围的维护是P的危险因素。在患者至少20年的功能之后，私下随访，与无LMGS植入物相比，LMGS植入物的P.吸烟,以前治疗过的牙周炎，缺乏种植体周围的维护是与P.
