The use of 3D printing technology in human defect reconstruction-a review of cases study

Abstract

In this paper, we report the benefit of Computer Tomography (CT), reverse engineering (RE) and rapid prototyping (RP) in individual implant production for maxillofacial surgery. The design and fabrication processes includes: a) processing medical image data of a patient's pathologically defective area having a symmetrical part to construct a three-dimensional (3D) digital model; b) forming an image on the defective side, in this step different techniques are applied for individual cases, including mirroring the non-defect side, implant design from other skull CT data; c) implant geometry modeling; d) 3D printing of the skull and implant model; e) surgical planning and prosthesis fitting; f ) casting of a custom-fit titanium implant. Results show that the CAD method can reconstruct the defect after surgical resection. The 3D printing technique provides an accurate tool for preoperative, surgical simulation. The design and manufacturing time of the bone implant has thus been significantly reduced using the CAD method.

Biomateriales y tecnologías de impresión 3D en entrenamiento quirúrgico en otorrinolaringología: una revisión

“…Destaca la generación de modelos mandibulares completos, en los cuales se reemplaza el segmento afectado con una imagen en espejo del lado mandibular normal. De forma similar, Singare y cols 37 nos presenta una serie de casos de implantes en reconstrucción de defectos nasales, mandibulares y maxilares mediante uso de tecnología de impresión 3D, en los cuales el modelo creado se utiliza para planeamiento, ajuste y creación de prótesis pre-cirugía en materiales biocompatibles clásicos (como el titanio), logrando mejores resultados, menor pérdida de sangre y recuperación más expedita. En estos estudios se destaca el diseño de la neo-mandíbula basándose en una imagen especular del lado sano, por lo que ofrece un buen resultado estético.…”

Reconstruction of Complex Zygomatic Bone Defects Using Mirroring Coupled with EBM Fabrication of Titanium Implant

“…There are two types of implant reconstruction techniques widely used in custom designs [32]. The first is a mirror reconstruction technique and the other is an anatomical reconstruction design based on a curve based and refinement approach [4].…”

Novel finite element‐based plate design for bridging mandibular defects: Reducing mechanical failure

“…Numerous studies applied patient-specific reconstruction plates (PS-RP) to prevent plate fracture by changing the material or design of conventional RP (Li et al, 2013;Luo, Xu, Guo, & Rong, 2017;Narra et al, 2014;Singare, Shenggui, & Sheng, 2017) but did not look at screw pull-out and its prevention. In order to prevent failure in further developed PS-RP, it is necessary to assess current conventional reconstructions biomechanically.…”