Comparison of 3 luting agents on retention of implant-supported crowns on 2 different abutments.

Abstract:

BACKGROUND:For fixed prostheses, retention is one of the most important factors for clinical success. It is unknown whether grooves that increase surface area of implant abutment while retaining the diameter and wall height provide greater uniaxial retention force. The purpose of this study was to determine the retention of 3 different cements on 2 implant abutments with different surface configurations. MATERIALS AND METHODS:Thirty samples on 2 different abutments (a total of 60 crowns) with different margin and axial walls configuration and surface area were used. Metal crowns were fabricated on the abutment and cemented with 3 different (zinc-phosphate [ZP], glass ionomer [GI], or eugenol-free zinc oxide [ZO]) cements. After cementation, implant-abutment-casting assemblies were thermal cycled 1000 times with 1-minute dwell-time between 5°C and 55°C then subjected to tensile test with universal testing machine until decementation occurred. The mean force required to dislodge castings from abutment was determined. RESULTS:The luting agents influenced retention of castings on implant abutments, whereas different surface configurations and total surface area of the abutments did not influence the uniaxial retention forces. Among the cements tested, ZP exhibited higher values of retention, followed by GI and eugenol-free ZO. CONCLUSIONS:The increase in surface area of abutment did not result in improved retention. The present results suggest using ZP rather than GI and eugenol-free ZO in implant-supported crowns to provide higher retention.

journal_name

Implant Dent

journal_title

Implant dentistry

authors

Güncü MB,Cakan U,Canay S

doi

10.1097/ID.0b013e318225f68e

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

349-53

issue

5

eissn

1056-6163

issn

1538-2982

journal_volume

20

pub_type

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