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ORIGINAL ARTICLE
Year : 2018  |  Volume : 8  |  Issue : 2  |  Page : 82-86

Effect of various luting agents on retention of cement-retained implant restorations with different modifications - An in-vitro study


1 Department of Prosthodontics, Adhiparasakthi Dental College and Hospital, Melmaruvathur, Tamil Nadu, India
2 Department of Prosthodontics, Rajah Muthiah Dental College and Hospital, Chidambaram, Tamil Nadu, India
3 Private practitioner

Correspondence Address:
Dr. S Mohammed Imthiyas
Plot No 38, Sardar Patel 1st Street, ECR Road, Kanathur, Kanchipuram - 603 112, Tamil Nadu
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmd.ijmd_33_18

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Introduction: Cement-retained restorations are the most common mode of attaining retention in implant prosthesis. Surface modifications can enhance the retention of the cement-retained implant restorations. Materials and Methods: A total of 45 copings (n = 45) were fabricated and divided into three groups based on the types of cements used: Group A – zinc phosphate cement, Group B – zinc polycarboxylate cement, and Group C – glass-ionomer cement. Each group was subdivided into three subgroups depending on the surface treatment employed: Subgroup 1 – unmodified copings (controlled group), Subgroup 2 – sandblasted copings, and Subgroup 3 – roughened abutment. The blocks with abutments on which the coping was cemented on them were locked on a universal testing machine. Results: The mean load required to debond the copings cemented with zinc phosphate cement under various surface modifications was found to be 154 N for unmodified copings, 184 N for sandblasted copings, and 171 N for roughened abutments. The mean load required to debond the copings cemented with zinc polycarboxylate cement under various surface modifications was found to be 212 N for unmodified copings, 325 N for sandblasted copings, and 390 N for roughened abutments, respectively. The mean load required to debond the copings cemented with Type 1 glass-ionomer cement under various surface modifications was found to be 302 N for unmodified copings, 413 N for sandblasted copings, and 412 N for roughened abutments. Conclusion: The retentive properties of the three types of cements tested in this study were statistically significant. Type 1 glass-ionomer cement shows the highest mean retentive strength, followed by zinc polycarboxylate and zinc phosphate cement. There was no statistically significant difference between the sandblasted and roughened abutment copings cemented with Type 1 glass-ionomer cement.


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