Abstract

Purpose of the Study: The purpose of this study was to evaluate the retention values and marginal adaptation of implant- supported metal crowns using four different cementation techniques.

Materials and Methodology: Eighty implant abutment complex (IAC) and metal crowns with defect free and smooth marginal surface were used in the study. Each IAC was composed of a 5.5 mm high titanium abutment screwed onto a 10mm long stainless steel implant analog with 25 Ncm torque according to manufacturer’s instructions. The specimens were divided into four groups (groups A-D, twenty specimens per group) according to the cementation technique employed. In Group A, cement was evenly placed over the entire interior marginal surface (IMS) of the crown. In Group B, cement was evenly placed only on the occlusal surface of the crown. In Group C, cement was evenly applied on all the axial walls of interior surface of crown excluding occlusal surface In Group D resin abutment replica technique was used. Zinc phosphate cement (DPI, Harvard) was used for all cementation procedures according to manufacturer’s instructions. All specimens were subjected to 1000 thermal cycles between 5˚C and 55˚C with a dwell time of 10 seconds in a thermocycling device. Marginal accuracy was detected after cementation of all specimens by stereomicroscope. The tensile force required to dislodge the copings were determined using a universal testing machine with a cross-head speed of 0.5 mm/ min. Data was collected and statistically analyzed.

Results: Highly significant differences in the marginal discrepancies were observed when different cementation techniques were used. Group D (abutment replica) had the highest mean retentive strength while having the least marginal discrepancy when compared to other groups.

Conclusion: Based on the results obtained from this study it was concluded that the use of abutment replica technique resulted in the best marginal adaptation retention of cement retained implant prosthesis as compared to other techniques used in the study.

Keywords: Implant Crown Cementation; Marginal Discrepancy; Peri Implantitis

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Citation

Citation: Swati Jain., et al. “A Comparative Evaluation of Cement Application Methods on Marginal Discrepancies and Retention of Cement Retained Implant Restorations: An In Vitro Study”. Acta Scientific Dental Sciences 4.9 (2020): 155-163.

Copyright

Copyright: © 2020 Swati Jain., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.