Acuidade dimensional de coroas totais provisórias confeccionadas pelo método de impressão 3D
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Data
2023-03-16
Autores
Pereira, Ellen Randoli
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Universidade Estadual Paulista (Unesp)
Resumo
Atualmente, a impressão 3D, método de fabricação aditivo do sistema CAD/CAM, veio para implementar o conceito de customização em massa na odontologia: permite que uma grande quantidades de produtos personalizados sejam produzidos a custos relativamente baixos. Há, atualmente, uma gama de materiais utilizados para impressão 3D na odontologia, de acordo com suas indicações, porém, são necessários mais estudos detalhando o desempenho de materiais confeccionados por essa tecnologia, bem como a metodologia aplicada. Esse estudo teve como objetivo avaliar a acuidade dimensional de coroas totais provisórias impressas com resina fotopolimerizável por uma impressora 3D tipo LCD por meio da metrologia optica, variando angulação de impressão e número de coroas impressas por vez em uma única plataforma de construção. As coroas foram impressas com resina para coroa provisória, A2 temporário (Wilcos), divididas em quatro grupos com n=12: grupo A - 3 coroas posicionadas a 150° no eixo x; grupo B - 4 coroas posicionadas a 150° no eixo x; grupo C - 3 coroas posicionadas a 180° no eixo x e grupo D - 4 coroas posicionadas a 180° no eixo x. A acuidade dimensional foi feita com a sobreposição de imagens no programa de aferição Gom Inspect, em que o STL de cada coroa foi alinhado e comparado ao modelo mestre. Para análise estatística, foram utilizados os testes ANOVA um fator e Shapiro-Wilk. Com base na acuidade dimensional, a impressão de coroas provisórias com impressora 3D tipo LCD é mais precisa com angulação de 150 graus e não há diferença entre 3 e 4 coroas impressas por vez.
Currently, 3D printing, additive manufacturing method of the CAD/CAM system, has come to implement the concept of mass customization in dentistry: it allows a large amount of personalized products to be produced at relatively low costs. There is currently a range of materials used for 3D printing in dentistry, according to their indications, however, more detailed studies are needed on the performance of materials made by this technology, as well as the applied methodology. This study aimed to evaluate the dimensional accuracy of full provisional crowns printed with photopolymerizable resin by an LCD-type 3D printer using optical metrology, varying printing angle and number of crowns printed at a time on a single construction platform. The crowns were printed with A2 temporary crown resin (Wilcos), divided into four groups with n=12: group A - 3 crowns positioned at 150° on the x axis; group B - 4 crowns positioned at 150° on the x axis; group C - 3 crowns positioned at 180° on the x axis and group D - 4 crowns positioned at 180° on the x axis. Dimensional acuity was performed by superimposing images in the Gom Inspect gauging program, in which the STL of each crown was aligned and compared to the master model. For statistical analysis, one-way ANOVA and Shapiro-Wilk tests were used. Based on dimensional accuracy, printing temporary crowns with LCD type 3D printer is more accurate with 150 degree angulation, and there is no difference between 3 and 4 crowns printed at a time.
Currently, 3D printing, additive manufacturing method of the CAD/CAM system, has come to implement the concept of mass customization in dentistry: it allows a large amount of personalized products to be produced at relatively low costs. There is currently a range of materials used for 3D printing in dentistry, according to their indications, however, more detailed studies are needed on the performance of materials made by this technology, as well as the applied methodology. This study aimed to evaluate the dimensional accuracy of full provisional crowns printed with photopolymerizable resin by an LCD-type 3D printer using optical metrology, varying printing angle and number of crowns printed at a time on a single construction platform. The crowns were printed with A2 temporary crown resin (Wilcos), divided into four groups with n=12: group A - 3 crowns positioned at 150° on the x axis; group B - 4 crowns positioned at 150° on the x axis; group C - 3 crowns positioned at 180° on the x axis and group D - 4 crowns positioned at 180° on the x axis. Dimensional acuity was performed by superimposing images in the Gom Inspect gauging program, in which the STL of each crown was aligned and compared to the master model. For statistical analysis, one-way ANOVA and Shapiro-Wilk tests were used. Based on dimensional accuracy, printing temporary crowns with LCD type 3D printer is more accurate with 150 degree angulation, and there is no difference between 3 and 4 crowns printed at a time.
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Impressão 3D, coroa total, prótese dental, escaneamento, 3D printing, full crown, Dental prosthesis, scan