Avaliação tridimensional de fatores que influenciam na exatidão do escaneamento intraoral em arcadas parcialmente dentadas com implantes: estudo in vitro
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Data
2023-05-23
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Universidade Estadual Paulista (Unesp)
Resumo
As moldagens digitais são uma alternativa viável quando comparado às técnicas convencionais devido às limitações, como alterações dimensionais do material, tempo de cadeira e desconforto do paciente. No entanto, a literatura ainda carece de um consenso sobre a precisão dos escâneres intraorais em arcadas com implantes. Assim, o objetivo deste estudo foi avaliar, diversos fatores que podem influenciar na veracidade e precisão do escaneamento intraoral de arcadas parcialmente dentadas com implantes instalados. Um modelo mestre de uma maxila parcialmente dentada com cinco implantes, nas regiões dos dentes 14, 16, 22, 23 e 24, foi escaneado com um escâner de bancada R700 3Shape, para ser utilizado como imagem STL (estereolitografía) referência. Foram realizadas digitalizações, alternando as variáveis de padrões de escaneamento de acordo com os grupos: CH: continuo horizontal; CV: continuo vertical; SH: segmentado horizontal; SV: segmentado vertical; além disso, foi avaliada a extensão da digitalização de acordo com os grupos: DPD (parcial direita), DPE (parcial esquerda) e DT (total) e tipo de espaço protético de acordo com os grupos, implante/implante e implante/dente, com digitalizações parciais de cada lado do modele mestre. As digitalizações foram feitas com o escâner intraoral Cerec Omnicam para cada grupo (n=10). Para avaliação da veracidade e precisão do sistema, os STLs foram exportados para um software (Geomagic Control X) para posterior sobreposição das imagens de estudo. Os dados de desvio foram submetidos ao teste de normalidade de Shapiro-Wilk com teste não paramétrico de Kruskall-Wallis complementado pelo teste de Dunn. O software GraphPad Prism 8 foi utilizado com nível de significância de 5 %. Os resultados mostraram que o padrão CH foi o que apresentou maior veracidade, com um valor de 0,06 mm. Para a extensão de digitalização o grupo de escaneamento parcial foi o mais satisfatório em relação ao total com um valor de 0,05 e 0,06 mm respectivamente. Quando comparados os diferentes espaços protéticos, o grupo implante/dente teve menores desvios quando comparado ao lado implante/implante. Em conclusão, os escâneres intraorais podem ser utilizados para a digitalização de arcos parcialmente dentados com implantes. Todavia, deve ser considerado que os diferentes padrões de escaneamento, o tipo de espaço protético e a extensão da digitalização influenciam na veracidade e precisão dos escâneres intraoral Cerec Omnicam.
Digital impressions are a viable alternative when compared to conventional techniques due to limitations such as material dimensional changes, chair time and patient discomfort. However, the literature still lacks a consensus on the accuracy and veracity of intraoral scanners in arches with implants. Thus, the aim of this study was to evaluate possible factors that may influence the veracity and precision of intraoral scanning of partially dentate arches with implants installed. A master model of a partially dentate maxilla with five implants, in the regions of teeth 14, 16, 22, 23 and 24, was scanned with an R700 3Shape benchtop scanner, to be used as a reference STL (stereolithography) image. Scans were performed, alternating the variables of continuous, segmented, horizontal and vertical scanning patterns, according to the groups: CH: continuous horizontal; CV: vertical continuous; SH: horizontal segmented; SV: vertically segmented; in addition, the extent of digitalization was evaluated according to the groups: DPD (partial right), DPE (partial left) and DT (total) and type of prosthetic space according to the groups, implant/implant and implant/tooth, with partial scans of each side of the master model. Scans were taken with the Cerec Omnicam intraoral scanner for each group (n=10). To evaluate the veracity and precision of the system, the STLs were exported to a software (Geomagic Control X) for subsequent superimposition of the study images. Deviation data were submitted to the Shapiro-Wilk normality test with the non-parametric Kruskall-Wallis test, complemented by the Dunn test. The GraphPad Prism 8 software was used with a significance level of 5%. The results showed that the CH pattern was the one with the highest accuracy, with a value of 0.06 mm. For the scanning distance, the partial scanning group was the most satisfactory in relation to the total with a value of 0.05 and 0.06 mm respectively. When comparing the different prosthetic spaces, the implant/tooth group had smaller deviations when compared to the implant/implant side. In conclusion, intraoral scanners can be used for scanning partially dentate arches with implants. However, it must be considered that the different scanning patterns, the type of prosthetic space and the length of the scan influence the accuracy of the Cerec Omnicam intraoral scanners.
Digital impressions are a viable alternative when compared to conventional techniques due to limitations such as material dimensional changes, chair time and patient discomfort. However, the literature still lacks a consensus on the accuracy and veracity of intraoral scanners in arches with implants. Thus, the aim of this study was to evaluate possible factors that may influence the veracity and precision of intraoral scanning of partially dentate arches with implants installed. A master model of a partially dentate maxilla with five implants, in the regions of teeth 14, 16, 22, 23 and 24, was scanned with an R700 3Shape benchtop scanner, to be used as a reference STL (stereolithography) image. Scans were performed, alternating the variables of continuous, segmented, horizontal and vertical scanning patterns, according to the groups: CH: continuous horizontal; CV: vertical continuous; SH: horizontal segmented; SV: vertically segmented; in addition, the extent of digitalization was evaluated according to the groups: DPD (partial right), DPE (partial left) and DT (total) and type of prosthetic space according to the groups, implant/implant and implant/tooth, with partial scans of each side of the master model. Scans were taken with the Cerec Omnicam intraoral scanner for each group (n=10). To evaluate the veracity and precision of the system, the STLs were exported to a software (Geomagic Control X) for subsequent superimposition of the study images. Deviation data were submitted to the Shapiro-Wilk normality test with the non-parametric Kruskall-Wallis test, complemented by the Dunn test. The GraphPad Prism 8 software was used with a significance level of 5%. The results showed that the CH pattern was the one with the highest accuracy, with a value of 0.06 mm. For the scanning distance, the partial scanning group was the most satisfactory in relation to the total with a value of 0.05 and 0.06 mm respectively. When comparing the different prosthetic spaces, the implant/tooth group had smaller deviations when compared to the implant/implant side. In conclusion, intraoral scanners can be used for scanning partially dentate arches with implants. However, it must be considered that the different scanning patterns, the type of prosthetic space and the length of the scan influence the accuracy of the Cerec Omnicam intraoral scanners.
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Impressão tridimensional, Implantes dentários, Prótese dentária, Printing, three-dimensional, Dental implants, Dental prosthesis