Fracture resistance of titanium and zirconia abutments: An in vitro study

Fracture Resistance and Mode of Failure of Ceramic versus Titanium Implant Abutments and Single Implant‐Supported Restorations

“…This study showed that titanium abutments were associated with the highest fracture resistance, as previously reported . The highest mean fracture load of a metal‐ceramic crown supported by titanium abutments reported in this study (1012 N) was larger than what was reported by Cho and colleagues (333 N), Kohal and colleagues (531 N), and Leutert and colleagues (678.2 N).…”

“…The fracture resistance of ceramic abutments is higher than the maximum anterior occlusal loads reported in the literature . Nevertheless, titanium abutments have higher fracture resistance than zirconia abutments …”

“…Also, ceramic crown/ceramic abutment assemblies were associated with crown and abutment fractures. Unfortunately, there is no other reported consistent mode of failure of ceramic assemblies in the literature …”

Load to failure of different zirconia abutments for an internal hexagon implant

“…These include zirconia fracture and wear of the titanium implant body at the zirconia interface. [4][5][6][7][8][9][10] Wear of the implant body at the abutment interface has been compared for titanium and zirconia 1-piece abutments after various intervals of cyclic loading in vitro 4 and quantified with scanning electron microscopy and image analysis software. Implants paired with zirconia abutments experienced a greater initial rate of wear and more overall wear than implants with titanium abutments.…”

Formation of white oxide layer on Zr-14Nb alloy using thermal treatment

“…Recently, a consistent trend has been observed toward esthetic improvements in implant restorative materials. To achieve optimal esthetics, investigators have developed zirconia ceramic abutments, advantages of which include light transmission properties, excellent esthetic qualities with resemblance to natural tooth color, and good compatibility with periimplant soft tissues 3,4) , with minimal disadvantages such as decreased fatigue resistance 5,6) . The fracture toughness of ceramics, even zirconia ceramics, is much less compared with that of metals.…”