Amini Parviz, Hejazi Maryam, Taghva Masumeh, Safari Sina
DDS. Prosthodontics Research Center, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
DDS, MSc. Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Clin Exp Dent. 2024 Apr 1;16(4):e399-e405. doi: 10.4317/jced.61175. eCollection 2024 Apr.
The purpose of this study was to determine the effect of one-wall elimination of the abutment and also the surface treatment of the abutment on the retention of cement-retained, implant-supported zirconium oxide copings.
In this experimental study, four straight abutments were connected to four implant analogs (DIO, UF, Busan, Korea) with 35 Ncm torque. They are mounted vertically in resin blocks. Abutments were prepared as following groups: A) abutment was used in its intact standard form as a control group. B) 4 mm of the flat wall was removed to produce an abutment with 3 walls. C) The abutment surface was abraded with 50 µm AL2O3 powder. D) 4 mm of a flat wall of the abutment was removed, then the abutment surface was abraded with 50 µm AL2O3 airborne particle.10 zirconium oxide copings were made. Samples were cemented with temp bond NE to abutments. The retention of copings was measured before and after incubation using the universal testing machine. T-test, one-way ANOVA, and Post Hoc Tukey Test were used for statistical analysis of data.
In all groups, retention was decreased after thermocycling ( ≤0.001). 3 wall abutments had less retention than the control group before thermocycling. A significant difference was detected between 3 wall abutments and 4 walls of sandblasted abutments before thermocycling. After thermocycling, no difference in retention was seen between groups.
Thermocycling significantly reduces the retention of implant-supported ceramic copings. Sandblasting abutments with 50 µm AL2O3 air-borne particles did not increase the retention of ziconium oxide copings which were cemented with temp bond NE. One wall elimination of abutment decreased the retention of zirconia copings. Retention, crown, abutment, zirconia coping, sandblasting.
本研究的目的是确定基台单壁消除以及基台表面处理对粘结固位的种植体支持氧化锆冠桥固位力的影响。
在本实验研究中，将四个直基台以35 Ncm的扭矩连接到四个种植体代型（韩国釜山DIO、UF）上。它们垂直安装在树脂块中。基台按以下组制备：A）基台以其完整的标准形式作为对照组使用。B）去除4 mm的平壁以制备具有三壁的基台。C）用50 µm的AL2O3粉末对基台表面进行研磨。D）去除基台4 mm的平壁，然后用50 µm的AL2O3气载颗粒对基台表面进行研磨。制作了10个氧化锆冠桥。样本用临时粘结剂NE粘结到基台上。使用万能试验机在孵育前后测量冠桥的固位力。采用t检验、单因素方差分析和事后Tukey检验对数据进行统计分析。
在所有组中，热循环后固位力均降低（≤0.001）。在热循环前，三壁基台的固位力低于对照组。在热循环前，三壁基台和喷砂处理的四壁基台之间检测到显著差异。热循环后，各组之间在固位力方面未见差异。
热循环显著降低种植体支持的陶瓷冠桥的固位力。用50 µm的AL2O3气载颗粒对基台进行喷砂处理不会增加用临时粘结剂NE粘结的氧化锆冠桥的固位力。基台单壁消除会降低氧化锆冠桥的固位力。固位力、牙冠、基台、氧化锆冠桥、喷砂处理。
