Elmesery Amr Mohammed Hussein, Korsel Amany Mohammed, Elshahawy Waleed
Fixed Prosthodontics Department, Faculty of Dentistry, King Salman International University, South Sinai, Egypt, Egypt.
Fixed Prosthodontics Department, Faculty of Dentistry, Tanta University, Tanta, Egypt.
BMC Oral Health. 2025 May 20;25(1):738. doi: 10.1186/s12903-025-06112-0.
The marginal fit and force-damping response of implant-supported restorations play critical roles in the long-term success of dental implants. This study evaluates the effect of implant abutment materials- resin-ceramic material, lithium disilicate, PEEK, and Titanium- on implant-supported restorations' marginal fit and force-damping response. The study offers novel insights into stress distribution and marginal gaps, aiming to optimize implant-supported restoration outcomes.
Forty implant abutments were divided into four equal groups: Shofu HC, Tessera, BioHPP, and Titanium. Vertical marginal gap measurements were taken using a digital microscope before and after Cementation, and force damping was assessed using a custom impact test machine. Non-metal abutments were custom-fabricated using STL files and a CAD/CAM machine (CEREC MC X5, Dentsply Sirona) for Tessera (MT/LT-BL2), Shofu HC Block (A3-LT/M), a resin hybrid ceramic (61% zirconium silicate, 39% nano-filler composite), and BioHPP (bredent GmbH & Co KG). Quantitative data were expressed as mean ± SD and analyzed using ANOVA with post hoc Tukey test. Normality was confirmed with the Shapiro-Wilk test, and differences between groups were assessed with an unpaired Student's t-test.
Before Cementation, the Biohpp group demonstrated the highest marginal gap (35.49 ± 2.31 µm), followed by Titanium (31.05 ± 1.87 µm) and Shofu HC Block (29.35 ± 1.72 µm). Tessera exhibited the lowest marginal gap (23.70 ± 2.99 µm) (P < 0.001). After Cementation, marginal gaps increased across all groups, with Biohpp (46.47 ± 3.10 µm) and Titanium (38.43 ± 2.25 µm) showing the most significant gaps, while Tessera continued to demonstrate the lowest (30.80 ± 1.64 µm) (P < 0.001). In force damping tests, Shofu HC Block recorded the lowest impact force (0.804 ± 0.034 N), followed by Biohpp (0.866 ± 0.027 N) and Tessera (0.920 ± 0.029 N). Titanium exhibited the highest force (0.970 ± 0.033 N), with all results showing statistical significance (P < 0.001).
Lithium disilicate exhibited the smallest marginal gap before and after Cementation, while PEEK showed the largest, followed by Titanium and resin-ceramic material. Resin-ceramic material had the highest shock absorption for force damping, followed by PEEK and Lithium disilicate, while Titanium recorded the highest impact force, indicating the least damping ability.
种植体支持修复体的边缘适合性和力衰减响应在牙种植体的长期成功中起着关键作用。本研究评估了种植体基台材料（树脂陶瓷材料、二硅酸锂、聚醚醚酮和钛）对种植体支持修复体边缘适合性和力衰减响应的影响。该研究为应力分布和边缘间隙提供了新的见解，旨在优化种植体支持修复体的效果。
40个种植体基台分为四组，每组数量相等：松风HC、泰瑟拉、BioHPP和钛。在粘结前后使用数字显微镜测量垂直边缘间隙，并使用定制冲击试验机评估力衰减。使用STL文件和CAD/CAM机器（CEREC MC X5，登士柏西诺德）为泰瑟拉（MT/LT-BL2）、松风HC块（A3-LT/M）（一种树脂混合陶瓷，61%硅酸锆，39%纳米填料复合材料）和BioHPP（bredent GmbH & Co KG）定制制造非金属基台。定量数据以平均值±标准差表示，并使用方差分析和事后Tukey检验进行分析。通过Shapiro-Wilk检验确认正态性，并使用未配对学生t检验评估组间差异。
粘结前，Biohpp组边缘间隙最大（35.49±2.31 µm），其次是钛（31.05±1.87 µm）和松风HC块（29.35±1.72 µm）。泰瑟拉边缘间隙最小（23.70±2.99 µm）（P<0.001）。粘结后，所有组的边缘间隙均增加，Biohpp（46.47±3.10 µm）和钛（38.43±2.25 µm）的间隙增加最为显著，而泰瑟拉仍显示最小间隙（30.80±1.64 µm）（P<0.001）。在力衰减测试中，松风HC块记录的冲击力最低（0.804±0.034 N），其次是Biohpp（0.866±0.027 N）和泰瑟拉（0.920±0.029 N）。钛的力最高（0.970±0.033 N），所有结果均具有统计学意义（P<0.001）。
二硅酸锂在粘结前后边缘间隙最小，而聚醚醚酮最大，其次是钛和树脂陶瓷材料。树脂陶瓷材料在力衰减方面具有最高的减震能力，其次是聚醚醚酮和二硅酸锂，而钛的冲击力最高，表明其减震能力最低。
