Dimensional error of selective laser sintering, three-dimensional printing and PolyJet™ models in the reproduction of mandibular anatomy

The use of laser scanner and coordinate measurement machine in evaluation of geometrical precision in 3D PolyJet printing

“…Natomiast w pracach [7 i 8] szukano wartości niedokład-ności modelowania medycznego za pomocą MW. Autor [3] starał się ocenić różnicę w modelach wykonanych dwoma różnymi technikami szybkiego prototypowania: SLS i PolyJet.…”

Clinical Applications of Rapid Prototyping Models in Cranio-Maxillofacial Surgery

“…However, SLS prototypes have a better dimensional precision and reproduce anatomical details of the craniomaxillary region more accurately than 3DP prototypes . Ibrahim et al obtained a dimensional error for 3DP of 1.07 mm (2.67%) when comparing SLS (0.89 mm and 2.10%) and 3DP models and dry skulls (Ibrahim et al, 2009). …”

“…This accuracy depends on the thickness of the CT scans used, which should be as thin as possible (1 to 2 mm is a good compromise for a skull study); the field of view should have a resolution of 512 x 512 and not generate tilting during image acquisition (Sannomiya et al, 2008). Silva et al and Ibrahim et al (Ibrahim et al, 2009) found a dimensional error of 2.10% for the SLS prototype in comparison with the dry skull. The authors found an inverse correlation between the external and internal dimensions that may be explained by the dumb-bell effect described by Choi et al (Choi et al, 2002), in which an increase in external dimensions and a simultaneous decrease in internal dimensions indicated that the prototypes had larger dimensions than the original skull and that the selected threshold may have been too low.…”

Adaptação de infraestruturas metálicas de próteses fixas sobre implantes instalados na maxila por meio da cirurgia virtual guiada

“…Essa associação de tecnologias da TC e da PR tem possibilitado a construção de guias cirúrgicas, na tentativa de melhorar a precisão na instalação dos implantes (Sarment et al, 2003;Ibrahim et al, 2009). A utilização de guias cirúrgicas confeccionadas por meio da PR veio adicionar mais um fator na tentativa de um planejamento mais previsível em Implantodontia.…”

“…Hounsfield (1973), já vislumbrava a possibilidade desta tecnologia constituir uma revolução no diagnóstico por imagem. Isto culminou em um recurso valioso para o auxílio no diagnóstico e planejamento das reabilitações maxilares: a Prototipagem Rápida (Ibrahim et al, 2009).…”