Rathod Aradhana, Jalaluddin Mohammad, Devadiga Trupti Jagannath, Jha Shruti, Alzahrani Khaled M
Department of Prosthodontics, Al-Badar Rural Dental College and Hospital, Gulbarga, Karnataka, India.
Department of Periodontics and Oral Implantology, Kalinga Institute of Dental Sciences, KIIT Deemed to be University, Bhubaneswar, Odisha, India.
J Pharm Bioallied Sci. 2021 Nov;13(Suppl 2):S1093-S1097. doi: 10.4103/jpbs.jpbs_176_21. Epub 2021 Nov 10.
The aim of the study was to investigate whether the surface geometry or topography of implant abutments affects the retentive strength of prosthesis cemented with zinc phosphate on standard machined, sandblasted, and grooved implant abutments and to compare the results between them.
Fifteen similarly shaped implant abutments (MDcpk61; MIS Implant Technologies Ltd.,) (height 6.0 mm and 6-degree taper) were divided into three groups ( = 05): Group I - standard machined abutments without grooves, Group II - sandblasted abutments (same as Group I but sandblasted with 50 μ aluminum oxide), and Group III - abutment with prefabricated circumferential grooves. Further in these groups of 15 abutments, 5 abutments each are to be taken to check the retentive force of zinc phosphate cement. Fifteen identical cast copings was prepared to fit all 15 abutments. The castings will be cemented to each group of abutments with an above-mentioned luting agent. After thermal cycling and storage for 6 days in a water bath, a retention test is to be done with a tensile testing machine (Instron) (5 mm/min) and retentive forces will be recorded. Data will be subjected to one-way ANOVA test and Student's -test.
For zinc phosphate cement, F = 30.53 (>3.59 for = 0.05) shows a statistically significant difference between all the three groups.
Circumferential grooves on implant abutments give better retention when compared with standard machined (plain) and sandblasted abutments despite marked difference.
Retention of restoration depends on the surface of the abutment as well as the luting agents used. Incorporation of retentive grooves can enhance retention of prosthesis, especially in situation of short abutments.
本研究旨在调查种植体基台的表面几何形状或形貌是否会影响用磷酸锌粘固在标准加工、喷砂和带槽种植体基台上的修复体的固位强度，并比较它们之间的结果。
15个形状相似的种植体基台（MDcpk61；MIS种植技术有限公司）（高度6.0毫米，锥度6度）分为三组（每组n = 5）：第一组 - 无凹槽的标准加工基台，第二组 - 喷砂基台（与第一组相同，但用50μm氧化铝喷砂），第三组 - 带有预制圆周凹槽的基台。在这15个基台组中，每组再取5个基台来检测磷酸锌水门汀的固位力。制备15个相同的铸造内冠以适配所有15个基台。将铸件用上述粘结剂粘固到每组基台上。在热循环并在水浴中储存6天后，用拉伸试验机（英斯特朗）（5毫米/分钟）进行固位测试，并记录固位力。数据将进行单因素方差分析和学生t检验。
对于磷酸锌水门汀，F = 30.53（α = 0.05时>3.59）表明所有三组之间存在统计学显著差异。
与标准加工（光滑）和喷砂基台相比，种植体基台上的圆周凹槽能提供更好的固位，尽管差异明显。
修复体的固位取决于基台表面以及所使用的粘结剂。加入固位凹槽可增强修复体的固位，尤其是在基台较短的情况下。
