Novel Design and Finite Element Analysis of Diamond-like Porous Implants with Low Stiffness

Abstract

The purpose of this study was to design porous implants with low stiffness and evaluate their biomechanical behavior. Thus, two types of porous implants were designed (Type I: a combined structure of diamond-like porous scaffold and traditional tapered thread. Type II: a cylindrical porous scaffold filled by arrayed basic diamond-like pore units). Three implant-supported prosthesis models were constructed from Type I, Type II and commercial implants (control group) and were evaluated by finite element analysis (FEA). The stress distribution pattern of the porous implants were assessed and compared with the control group. In addition, the stiffness of the cylindrical specimens simplified from three types of implants was calculated. The Type I implant exhibited better stress distribution than the Type II implant. The maximum stress between the cortical bone–Type I implant interface was 12.9 and 19.0% lower than the other two groups. The peak stress at the cancellous bone–Type I implant interface was also reduced by 16.8 and 38.7%. Compared with the solid cylinder, the stiffness of diamond-like pore cylinders simplified from the two porous implants geometry was reduced by 61.5 to 76.1%. This construction method of porous implant can effectively lower its stiffness and optimize the stress distribution at the implant–bone interface.

Biomechanical evaluation of two implant-supported single crowns and union crown in the premolar area: a finite element analysis

“…The visualizational color stress cloud maps of the prosthetic components (abutment, implant and screw) for T1, T2 and T3 restorations models are displayed in figure 5. For all models, the greatest stress concentration was observed in the implant inner wall and abutment neck region, which was consistent with other literature [11]. However, the stress distribution on abutment and implant was obviously influenced by crown fixation mode (two separate cement-retained crowns, two separate screw-retained crowns and screw-retained union crown To further qualitatively compare the regularity of stress distribution in the three restorations models, the magnitude of the maximum equivalent stress of prosthetic components in each model was compared (Figure 6).…”

Bionic Porous Design and Mechanical Response of Short Implants

“…Therefore, low-stiffness implants have been recommended as a promising approach to reduce bone loss and have gained increasing popularity in recent years. [8].…”