Optimising the design and manufacture of a customised, prescription fit, Maxillo-facial prosthesis


Autoria(s): McGarry, Paul
Contribuinte(s)

O’Donnell, Gerard

Costello, Gabriel

Galway-Mayo Institute of Technology

Internal Research Development Programme. (IRDP)

Data(s)

2007

Resumo

This thesis is a continuation of the Enterprise-Ireland Research Innovation Fund (RIF) Project entitled’ "Design and Manufacturing of Customised Maxillo-Facial Prostheses" The primary objective of this Internal Research Development Program (IRDP) project was to investigate two fundamental design changes 1 To incorporate the over-denture abutments directly into the implant. 2 To remove the restraining wings by the addition of screws, which affix the. implant to the dense material of the jawbone. The prosthetic was redesigned using the ANSYS Finite Element Analysis software program and analysed to* • Reduce the internal von Mises stress distribution The new prosthetic had a -63.63 % lower von Mises stress distribution when compared with the original prosthetic. • Examine the screw preload effects. A maximum relative displacement of 22 6 * lO^mm between the bone and screw was determined, which is well below the critical threshold of micromotion which prevents osseointegration • Investigate the prosthetic-bone contact interface. Three models of the screw, prosthesis, and bone, were studied. (Axisymmetnc, quarter volume, and full volume), a recommended preload torque of 0 32 Nm was applied to the prosthetic and a maximum von Mises stress of 1.988 MPa was predicted • Study the overdenture removal forces. This analysis could not be completed because the correct plastic multilinear properties of the denture material could not be established The redesigned prosthetic was successfully manufactured on a 3-axis milling machine with an indexing system The prosthetic was examined for dimensional quality and strength The research established the feasibility of the new design and associated manufacturing method.

Identificador

MCGARRY, P., 2007. Optimising the design and manufacture of a customised, prescription fit, Maxillo-facial prosthesis. Unpublished thesis (Master of Science in Engineering), Galway-Mayo Institute of Technology

MSc

http://hdl.handle.net/10759/313153

http://cual.openrepository.com/cual/handle/10759/313153

Idioma(s)

en

Publicador

Galway-Mayo Institute of Technology

Direitos

Creative Commons

Palavras-Chave #Maxillofacial prosthesis #Customised Maxillo-Facial Prostheses design #Customised Maxillo-Facial Prostheses manufacture
Tipo

Master thesis (taught)