Abstract

In this work, design, manufacture and surgical success of a personalised temporomandibular prosthesis is featured. A fused deposition modelling technique and Die forging process constitute the methodology used in a patient who had an amputation in the upper third branch of the mandible, without considering the joint capsule. The implant was designed using a processed resection image of a computational tomography and using the methodology of Özkaya and Nordin. The jaw operating conditions were simulated by the finite element method (FEM). The main considered factors were the morphological geometry of the patient, implant fixation in the first third of the branch, implant fixation on the chin, dental post for placement of the teeth, and the form of the sub-lingual fossa weight optimisation. Special consideration was to preserve the patients facial aesthetics.

Abstract

Abstract

Abstract

Additive manufacturing technologies allow us the creation of 3D objects through layer overlay. This process is faster than other traditional manufacturing processes and it enables the customization of parts. Nowadays Fused Deposition Modelling (FDM) is the most used techonology. However, due to the nature of the process, resulting parts have complex mechanical behaviour, due to the fact that their properties vary according to the direction or the type of effort, which limits their applications in functional parts. To predict the behavior of a component Finite Element Analysis (FEA) are made. Although, the material models used by these analysis tools are not able to simulate the mechanical behavior of FDM products. Thus, a model supported by a finite element analysis tool, able to predict the behaviour of these materials has been developed. It works in the elastic and plastic region, for any geometry and load case. The model, feed by theoretical behavior models and experimental tensile, compression and shear tests, and implemented in FEA software, allows us to simulate the anisotropy of these materials in an easy and versatile way. The calculation methodology has also been experimentally validated.