The compressive strength of implant-abutment complex with different connection designs

Abstract

Background/purposeImplant-abutment connection is the component responsible for the transmitting of occlusal force from the crown down to the implant fixture. Different connection geometric structure will lead to different mechanical performance. The purpose of this study was to compare the stability of internal hex Implant -abutment connection with internal hex with Morse taper implant-abutment connection by testing their compressive strength.Materials and methodsThis was an in vitro study. The test group and the control group had 8 specimens separately. The test group was internal hex combined with Morse taper implant connection design, and the control group was internal hex connection design. Static force was applied to the specimens at a 30° angle until failure. The testing protocol was designed according to ISO14801 regulations. We compared the compressive strength of both groups.ResultsThe control group showed significantly higher compressive strength than the test group (p < 0.0001).ConclusionsFor the compressive strength of implant abutment complex, incorporating Morse taper design into internal hex connection failed to enhance its mechanical performance. According to this study, internal hex connection has higher compressive strength than internal hex connection combined with Morse taper design.

Marginal Bone Loss around Implants with Internal Hexagonal and Internal Conical Connections: A 12-Month Randomized Pilot Study

“…Thus, the crown-implant-bone occlusal load distribution system is key. On the contrary, Hung et al ensured that implants with an internal hexagonal connection show higher compressive strength than those with an internal hexagonal connection in combination with the Morse taper design [42]. It must be kept in mind though that the strength of a connection does not necessarily mean that the microbial contamination would be less or the load distribution better.…”

The mechanical and clinical influences of prosthetic index structure in Morse taper implant-abutment connection: a scoping review

“…The external hexagon was the first anti-rotation system in implant dentistry, after which Morse cone implants with indexed prosthetic connections were developed for more precise positioning between the abutment and the implant. The influence of the restorative index on the restoration of the Morse taper abutment on the implant stability has been evaluated using three-dimensional finite element analysis (FEA) [ 11 , 28 – 30 ] (Table 2 ). The FEA of Zancopé et al showed that the prosthetic index zone was in an out-of-stress condition and that the presence of the prosthetic index on the Morse tapered implant did not reduce the fracture resistance of the implant [ 28 ].…”

Mechanical in vitro fatigue testing of implant materials and components using advanced characterization techniques

“…Abutments are the connecting element between the dental implant and the visible dental crown, thus they transmit the forces from the oral cavity, which arise, for example, during chewing, and are, therefore, exposed to daily multiaxial stress. 25 Due to its high corrosion resistance and biocompatibility in combination with a high strengthto-weight ratio, [26][27][28] titanium alloys, among others, are state of the art for this application. 29 Concerning mechanical testing, the standard DIN EN ISO 14801 regulates the fatigue testing of endosseous dental implants.…”