Fixation Pins Increase the Accuracy of Implant Surgery in Free-End Models: An In Vitro Study

作者全名："Chen, Xi; Yang, Zhenyu; Wang, Yuan; Fu, Gang"

作者地址："[Chen, Xi; Yang, Zhenyu; Wang, Yuan; Fu, Gang] Chongqing Med Univ, Chongqing Key Lab Oral Dis & Biomed Sci, Chongqing Municipal Key Lab Oral Biomed Engn Highe, Stomatol Hosp, Chongqing, Peoples R China; [Fu, Gang] Chongqing Med Univ, Dept Implantol, Stomatol Hosp, Chongqing, Peoples R China; [Fu, Gang] Chongqing Med Univ, Stomatol Hosp, 426 Songshi North Rd, Chongqing 401147, Peoples R China"

通信作者："Fu, G (通讯作者)，Chongqing Med Univ, Stomatol Hosp, 426 Songshi North Rd, Chongqing 401147, Peoples R China."

来源：JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY

ESI学科分类：CLINICAL MEDICINE

WOS号：WOS:000991677600001

JCR分区：Q2

影响因子：2.3

年份：2023

卷号：81

期号：5

开始页：593

结束页：601

文献类型：Article

关键词：　

摘要："Purpose: Implant surgical guides, in combination with implant planning software, have been designed for accurate surgery, especially in partial edentulism. The purpose of this study was to examine the effect of fixation pins of surgical guides on the accuracy of static computer-assisted implant surgeries in a maxillary free-end situation. Materials and Methods: This in vitro study was conducted to compare surgical guides using various fix-ation pin protocols in implant surgery. A patient dental model with missing teeth from maxillary right first premolar to third molar was used as the study model. Implant placement was planned at maxillary right first premolar, right first molar, and right second molar; Straumann full guide templates were designed and fabricated using the coDiagnostiX software. The experiment involved surgical guides with no fixation pins (NF), buccal unilateral fixation pin (BF), palatal unilateral fixation pin (PF), and bilateral fixation pins on the buccal and palatal sides (BPF), based on the position and number of fixation pins. The deviation between the actual and planned positions was used to evaluate implant accuracy. The fixation pin protocols were the primary predictive variables. Angular, 3D platform, and 3D apex deviations were the primary outcome variables. Statistical analysis was performed using the one-way analysis of variance and Tukey's test (a = 0.05). Results: NF generated the maximum angular deviation (3.65 + 1.39 degrees), 3D platform deviation (1.58 + 0.55 mm), and 3D apex deviation (2.18 + 0.79 mm), whereas BPF produced the minimum angular deviation (1.88 + 0.86 degrees), 3D platform deviation (1.09 + 0.51 mm), and 3D apex deviation (1.53 + 0.45 mm). A statistically significant difference between NF and BPF in the angular deviation, 3D platform, and apex deviation (P < .0001, P = .009, and P = .002, respectively) was identified. The unilateral fixation pin exerted a significant effect only on the angular accuracy (BF, P = .0018; PF, P = .0001). Conclusion: In a maxillary free-end situation, templates with a fixation pin generate better implant accuracy than those without it. A bilateral fixation pin protocol may produce less deviation than those without fixation pins. The implant accuracy does not appear to be affected by the position of the unilateral fixation pin. (c) 2023 American Association of Oral and Maxillofacial Surgeons"

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