Achieving optimum dental aesthetics is a difficult and challenging task. Fixed dental restorations play a major role in dental aesthetics. Metal ceramic and all-ceramic restorations are most commonly used in clinical practice. Metal ceramic restorations are known for its strength and reasonable aesthetics. Traditionally Metal ceramic restorations incorporate a collar which is in fact an aesthetic handicap, as the metal collar blocks light transmission through the tooth structure, darkens the root and cause discoloration of gingiva adjacent to the restoration. Generally all ceramic...

The objective of the research was to determine the effect of luting agents, height of the implant abutments and the type of copings on the retention of cemented implant prosthesis. Two brands of standard titanium implant abutments of 3.75mm diameter and 6 degree taper were used (ADIN, MIS implant systems). The abutments were machined to two different heights viz. 4mm and 6mm. The implant analogs with the abutment were positioned in cylindrical bases using surveyor. Two types of copings were fabricated viz. metal copings and Zirconia copings. The copings were cemented with De Trey Zinc and...