Design and manufacture of a customised temporomandibular prosthesis C R Torres-San-Miguel 1 , JJ Hernández-Gómez 23 , G Urriolagoitia-Sosa 1 , B Romero-Ángeles 1 , L Martínez-Sáez 45 1 Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional. Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Delegación Gustavo A. Madero, 07738, Ciudad de México, México. 2 Centro de Desarrollo Aeroespacial, Instituto Politécnico Nacional. 3 Belisario Domínguez 22, Centro, Ciudad de México, 06610, México. 4 Instituto Universitario de Investigación del Automóvil, Universidad Politécnica de Madrid. 5 Carretera de Valencia, Km 7, Madrid, España. 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. OPEN ACCESS Published: 04/03/2019 Accepted: 26/02/2019 Submitted: 14/02/2018 DOI: 10.23967/j.rimni.2019.02.001 Keywords: CAD|CAM Custom prosthesis FDM FEM Digital temporomandibular models Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería Correspondence: C R Torres-San-Miguel (ctorress@ipn.mx), JJ Hernández-Gómez (jorge_hdz@ciencias.unam.mx), G Urriolagoitia-Sosa (gurriolagoitias@ipn.mx), B Romero-Ángeles (bromeroa@ipn.mx), L Martínez-Sáez (luis.martinez@upm.es). This is an article distributed under the terms of the Creative Commons BY-NC-SA license 1 1. Introduction Consequences of deceases are diverse, and might lead to total or partial loss of a member by amputation, that can significantly affect the patient. The replacement of an organ or a member with prosthesis can represent, for the person, a recovery of an aptitude to perform different tasks and even organic basic functions. According to [1] , psycho-social aspects toughen the patient in the recovery phase from surgery, mainly do to the number of successful - or not - surgical procedures. Such psycho-social deterioration is sometimes more incapacitating than the perception of the efficiency of undertaken surgical approach. Besides psycho-social, aesthetic aspects also affect the patient. All these factors contribute to his quality of life. In the case of low jaw, important factors to be considered to select the best method to reconstruct it could be the patient psychological aspects, the affecting disease, the expected quality of life, the age, height and weight of the jaw bone, the state of teeth, etc. It is also important to grant aesthetic aspects to the face in order to reinforce the natural person's confidence. Nevertheless, even with technological advances, complications in chewing, deficient sensing, infections, and weakness in the strength of the face structure are prone to exist. Much research has been done in the field of low jaw reconstruction. From open academic literature, the biomedical comparison between fixing a Titanium plate to the lateral edge of the jaw as well as to the low jaw edge is reported by [2] , finding significant differences in the implant's mechanical behaviour. In [3] , authors manufacture a replacement with specific measures of the patient's jaw, obtained prior to surgical procedure, yielding to a prosthesis which is very close to the original bone configuration of the patient. A 3D study, from tomographic resources, was developed by [4] , which allowed to determine the existence of mineralisation of the cortical bone distribution part. Additionally, in [5] , authors applied a 3D model to known the mechanical behaviour of the jaw, determining that it bears a load up to 107N/m 2 . This loading condition is generated by impact, and could lead to fractures at low jaw [5] . An anosteosynthesis plate for an atrophic jaw, by using a mono cortical osteosynthesis of 2 Titanium plates was developed by [6] . On the other side, it has been shown that a subjection element at the plate produces a better behaviour at the connection implant when chewing than other positions of