Resistance to dislodgement of zirconia copings cemented onto titanium abutments of different heights

Cement Selection for Implant‐Supported Crowns Fabricated with Different Luting Space Settings

“…The presence of a cement gap reduces the elevation of restorations, improves the outflow of excess cement, and lowers the seating forces, resulting in a better fit and retention of the final restoration 9,17‐19 . The cement gap thickness should be large enough to allow proper seating of the restoration but not so large as to cause excessive cement thickness 20 .…”

“…It is also accepted that for optimal results, the cement gap should be uniform 17 . The nature of CAD/CAM copings is that they are fabricated for a ‘“passive fit” with the assistance of an algorithm that provides for a uniform luting space 18 . By using CAD/CAM technology, it is possible to fabricate standard implant‐ and/or tooth‐supported metal copings with uniform but different luting space values 18,28 …”

Effect of different preparation heights and luting agents on tensile bond strengths in Nickel Chromium crown – a comparative invitro study

“…Clinically, a crown would hardly undergo such great tensile efforts as those applied in this study, but the tested experimental conditions serve as parameters to evaluate different properties and behaviors of the materials used. 8,9 The results of the present study may be explained by the fact that higher preparation height promotes greater superficial area with the crown. Although other factors may influence on crown retention, the preparations were standardized (cervical diameter, taper, roughness, piece fit), thus eliminating or minimizing the interference of these variables on the results.…”

Effect of Using Nano and Micro Airborne Abrasive Particles on Bond Strength of Implant Abutment to Prosthesis

“…The other factor, which affect the retentive strengths, is the height of abutments (23)(24)(25); meaning that higher abutments made higher values of retention. Saleh Saber et al (6) evaluated the retention of cemented coping to abutments with 2 mm height without any prior surface preparation in one of their groups.…”