3D Printed Temporary Veneer Restoring Autotransplanted Teeth in Children: Design and Concept Validation Ex Vivo

Abstract

(1) Background: Three-dimensional printing is progressing rapidly and is applied in many fields of dentistry. Tooth autotransplantation offers a viable biological approach to tooth replacement in children and adolescents. Restoring or reshaping the transplanted tooth to the anterior maxilla should be done as soon as possible for psychological and aesthetic reasons. However, to avoid interfering with the natural healing process, reshaping of transplanted teeth is usually delayed three to four months after transplantation. This delay creates a need for simple indirect temporary aesthetic restoration for autotransplanted teeth. The aim of this study was to develop and validate a digital solution for temporary restoration of autotransplanted teeth using 3D printing. (2) Methods: Four dry human skulls and four dry human mandibles were scanned using cone beam computed tomography to create 3D models for 15 premolars. Digital impression of the maxillary arch of one of the skulls was captured by intra oral scanner. The digital work flow for the design and fabrication of temporary veneers is presented. The seating and adaptation of the 3D printed veneers were evaluated using stereomicroscopy and micro-computed tomography. (3) Results: Evaluation of the veneer seating using stereomicroscopy showed that the mean marginal gap at all of the sides was below the cut-off value of 200 µm. The overall mean marginal gap was 99.9 ± 50.7 µm (median: 87.8 (IQR 64.2–133 µm)). The internal adaptation evaluation using micro-computed tomography showed an average median gap thickness of 152.5 ± 47.7 (IQR 129–149.3 µm). (4) Conclusions: The present concept of using temporary veneers that are designed and fabricated with CAD/CAM (computer-aided design/computer-aided manufacturing) technology using a DLP (digital light processing) printer may present a viable treatment option for restoration of autotransplanted teeth.

The Using Virtual Computer-Assisted Planning in Orthognathic Surgery: A Systematic Review and Meta-Analysis

“…Furthermore, it has been suggested 3D planning and fabrication of intermediate splints for bimaxillary orthognathic surgery [11]. Other studies also confirmed these results [14,15]. In this regard, the designed intermediate splint was accurate enough to satisfy the requirements of bimaxillary surgery [8].…”

Ten Years of Micro-CT in Dentistry and Maxillofacial Surgery: A Literature Overview

“…Dental caries is characterized by demineralization and the degeneration of organic matrix [66]. Micro-CT analysis resulted helpful to evaluate the validation of temporary and innovative restoration solutions [67]. The mineralization of carious enamel for the identification of a regenerative treatment solution for dental caries [68], as well as the demineralization of tissues, as the enamel adjacent to restoration margins in cavities filled with experimental composites, from extracted bovine incisors [69], are some of the aspects that were investigated.…”

“…In recent years, the power of the available commercial systems is continuously growing in terms of range of dimensions and resolutions. Table 1 reports, as an example, the datasheets of the laboratory micro-CT and CBCT systems considered in the previous cited study [124] and of recent frequently used micro-CT models [67,93,99], also for larger object sizes [95], allowing the comparison of the technical specifications. Firstly, it should be noted that micro-CT is not the only one tomography system applied in dentistry and MFS.…”

“…CAD/CAM, 3D printing, and AM benefit from microtomographic analysis to develop and validate solutions in dentistry, and MFS [120]. Rimawi et al presented an integrated approach applying intra-oral scanner, CBCT, micro-CT, 3D printing, and stereomicroscopy for temporary restoration of auto-transplanted teeth [67].…”

Polímeros para fabricación análoga y digital de bases de dentadura: un estudio comparativo de la resistencia flexional, módulo elástico y resistencia a la compresión de sus propiedades mecánicas

“…Adicionalmente, las propiedades mecánicas, químicas y tribológicas de este polímero lo hacen un material óptimo para ser utilizado también en la tecnología CAD/CAM, donde es posible fabricar coronas, puentes y bases de dentadura a partir de bloques o discos densos de PMMA. Por otra parte, la estereolitografía utiliza resinas acrílicas para la impresión de dientes provisionales 10 , bases de dentadura 11 , placas retenedoras para tratamientos de ortodoncia invisible 12 , carillas 13 , entre otras. Cada resina debe presentar diferentes características y propiedades, dependiendo de su aplicación final, que garanticen el desempeño ideal de la pieza impresa.…”