The Utility of Implant-Supported Fixed Dental Prosthesis Material for Implant Micromovement and Peri-implant Bone Microstrain: A Study in Rabbit Tibia

ABSTRACTThe abutment(s) of a partial fixed dental prosthesis (PFDP) should have a minimal total occlusal convergence (TOC), also called a taper, in order to ensure adequate retention of a PFDP that will be made for the abutment(s), given the height of the abutment(s). This article reviews the concept of PFDP abutment TOC and presents an alternative definition of what TOC is, defining it as the extent to which the shape of an abutment differs from an ideal cylinder shape of an abutment. This article also reviews experimental results concerning what is the ideal TOC in degrees and explores clinical techniques of estimating the TOC of a crown abutment. The author suggests that Dentists use high magnification loupes (×6-8 magnification or greater) or a surgical operating microscope when preparing crown abutments, to facilitate creating a minimum abutment TOC.

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Will implants with a fixed dental prosthesis in the molar region enhance the longevity of teeth adjacent to distal free‐end edentulous spaces?

Clinical Oral Implants Research ◽

10.1111/clr.13695 ◽

2020 ◽

Author(s):

Kodai Hatta ◽

Toshihito Takahashi ◽

Hitomi Sato ◽

Shinya Murakami ◽

Yoshinobu Maeda ◽

...

Keyword(s):

Dental Prosthesis ◽

Fixed Dental Prosthesis ◽

Molar Region

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The Influence of Custom-Milled Framework Design for an Implant-Supported Full-Arch Fixed Dental Prosthesis: 3D-FEA Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17114040 ◽

2020 ◽

Vol 17 (11) ◽

pp. 4040

Author(s):

João Paulo Mendes Tribst ◽

Amanda Maria de Oliveira Dal Piva ◽

Roberto Lo Giudice ◽

Alexandre Luiz Souto Borges ◽

Marco Antonio Bottino ◽

...

Keyword(s):

Experimental Design ◽

Dental Prosthesis ◽

Von Mises Stress ◽

Homogeneous Material ◽

Element Analysis ◽

Framework Design ◽

Fixed Dental Prosthesis ◽

Modeling Software ◽

3D Fea ◽

Von Mises

The current study aimed to evaluate the mechanical behavior of two different maxillary prosthetic rehabilitations according to the framework design using the Finite Element Analysis. An implant-supported full-arch fixed dental prosthesis was developed using a modeling software. Two conditions were modeled: a conventional casted framework and an experimental prosthesis with customized milled framework. The geometries of bone, prostheses, implants and abutments were modeled. The mechanical properties and friction coefficient for each isotropic and homogeneous material were simulated. A load of 100 N load was applied on the external surface of the prosthesis at 30° and the results were analyzed in terms of von Mises stress, microstrains and displacements. In the experimental design, a decrease of prosthesis displacement, bone strain and stresses in the metallic structures was observed, except for the abutment screw that showed a stress increase of 19.01%. The conventional design exhibited the highest stress values located on the prosthesis framework (29.65 MPa) between the anterior implants, in comparison with the experimental design (13.27 MPa in the same region). An alternative design of a stronger framework with lower stress concentration was reported. The current study represents an important step in the design and analysis of implant-supported full-arch fixed dental prosthesis with limited occlusal vertical dimension.

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