In vitro analysis of prosthetic abutment and angulable frictional implant interface adaptation: Mechanical and microbiological study

Immediate full-arch fixed rehabilitation of a narrow mandible with newly conceived connection system implants: A case report

“…In this regard, the Morse taper frictional implant‒abutment joint obtained better outcomes in terms of peri-implant bone resorption, realizing a deeper internal coupling between the fixture and the abutment without the need for a screw or cementum and behaving as a single-piece device. 33 , 34 The tapered fit allowed a thinner abutment concerning the fixture platform and the consequent “platform-switching” related bone overgrowth over the joint and adequate soft tissue height maintenance. 32 Nevertheless, the tapered junction is incompatible with the implants’ dis-parallelism, and angled abutments are required to obtain a superstructure passive connection.…”

Bacterial Detection, Deformation, and Torque Loss on Dental Implants with Different Tapered Connections Compared with External Hexagon Connection after Thermomechanical Cycling

“…The conical connection can bring clinical benefits derived from the increase in static friction between the components, preventing the torque loss of the prosthetic screw and fractures, which maintains stability during the action of masticatory stresses even with torque decrease over time [8]. The coefficients of friction between the surfaces of the internal conical platform, which can be related to the mechanical properties of the materials used in the components, area and roughness on the contact surface, external contaminants and the recommended torque, directly affecting the detorque values [17,19,21], where the area of contact formed between the prosthetic platform of the implant and abutment seems to have an effect on the connection efficiency [9,21]. Two internal conical connections with an angulation of 11.5 • and 16 • were used and lower values of torque loss were found in two groups of implants with a 16 • IAI (G2 and G3), showing a difference with all other groups of implants with an 11.5 • IAI.…”

“…Several connection and abutment designs have been developed, trying to improve biomechanical aspects such as torque loss, screw loosening, stability, and abutment strength [16,17]. The mismatch between the implant parts after the torque loss can cause micrometric movements, generating wear by dynamic friction in contacting surfaces of IAI, leading to fluid flow into the interface by the pumping effect [7,18,19]. Contamination by fluids at the IAI, such as saliva or blood, can decrease the removal torque values of the prosthetic screw, which ends up worsening the pump effect [16,20].…”

Investigating the Influence of All-Ceramic Prosthetic Materials on Implants and Their Effect on the Surrounding Bone: A Finite Element Analysis

“…Since clinical studies have shortcomings, finite element analysis (FEA) is a numerical stress analysis technique that has proven to be a useful tool in investigating the effect of the biomechanical properties of prostheses on dental implants [16]. Several in vitro studies and FEA were conducted to explore stress transmission at both the implant and peri-implant levels, employing various restorative materials for implant-supported prostheses [17][18][19][20][21]. This study was conducted to evaluate and compare the effect of monolithic zirconia and In-Ceram zirconia superstructures on the distribution of stresses in implants and D2 and D4 bone densities after the application of a vertical and oblique occlusal load of 200 N with the aid of a three-dimensional finite element study.…”