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Medição de desgaste dentário com goteira guia : estudo clínico
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Objetivo: Este estudo teve como objetivo avaliar se o uso de uma goteira fresada com pontos guias nos dentes padrão, in vivo, apresenta redução no erro do alinhamento de pequenas alterações de desgaste dentário utilizando um scanner intraoral.
Materiais e Métodos: A amostra incluiu 10 estudantes de medicina dentária com idades compreendidas entre 22 e 25 anos. Foram confecionadas goteiras personalizadas para cada participante utilizando o software BlueSky Plan®, com base em modelos 3D digitais obtidos do scaneamento da maxila com o scanner 3Shape Trios®. As goteiras foram fresadas numa máquina fresadora. Realizaram-se inicialmente (t0) os scans intraorais com a goteira colocada em boca (CG) e após um mês (t1), novos scans foram feitos sem (SG) e com a goteira (CG). A análise comparativa foi efetuada utilizando a ferramenta best-fit alignment com 3 estratégias de alinhamento: BFall (dentes todos), BFpg (pontos da goteira) e BFg (goteira completa), tendo sido escolhido o RMS como variável para calcular a magnitude dos desvios entre os scans sobrepostos.
Resultados: Observou-se que não existem diferenças estatisticamente significativas entre as diversas estratégias de alinhamento com utilização da goteira (CGt0-CGt1-BFall, CGt0-CGt1-BFpg e CGt0-CGt1-BFg), nem entre estas e a análise sem goteira (SGt0-SGt1-BFall). Os valores de RMS das análises (CG-SG-BFall), tanto para (t0) como para a comparação (t0-t1), foram estatisticamente superiores (p<0,001) às restantes análises com o mesmo alinhamento, tanto com utilização de goteira (CGt0-CGt1-BFall), como sem utilização da mesma (SGt0-SGt1-BFall). O grupo que apresentou menor valor de RMS foi o best-fit nos próprios dentes.
Conclusões: A goteira fresada não reduziu substancialmente o erro de alinhamento, mas ofereceu uma referência estável que pode ser benéfica para futuras investigações. A deteção do desgaste dentário continua a ser desafiadora, destacando a necessidade de melhorar estratégias para a intervenção precoce.
Objective: The aim of this study was to assess whether the use of a reference splint with guide points on standard teeth, in vivo, shows a reduction in the alignment error of minor tooth wear changes using an intraoral scanner. Materials and Methods: The sample included 10 dental students aged between 22 and 25. Custom splints were made for each participant using BlueSky Plan® software, based on digital 3D models obtained from scanning the maxilla with the 3Shape Trios® scanner. The splints were milled on a milling machine. Initially (t0), intraoral scans were taken with the splint placed in the mouth (CG) and after one month (t1), new scans were taken without (SG) and with the splint (CG). The comparative analysis was carried out using the best-fit alignment tool with 3 alignment strategies: BFall (all teeth), BFpg (splint points) and BFg (complete splint), and the RMS was chosen as the variable to calculate the magnitude of the deviations between the overlapping scans. Results: It was observed that there were no statiscally significant differences between the various alignment strategies using the splint (CGt0-CGt1-BFall, CGt0-CGt1-BFpg and CGt0-CGt1-BFg), nor between them and the analysis without the splint (SGt0-SGt1-BFall). The RMS values of the (CG-SG-BFall) analyses, both for (t0) and for the comparison (t0-t1), were statistically higher (p<0.001) than the other analyses with the same alignment, both with the use of a splint (CGt0-CGt1-BFall) and without it (SGt0-SGt1-BFall). The group with the lowest RMS value was the best-fit on the teeth themselves. Conclusions: The milled splint did not substantially reduce the alignment error, but it did provide a stable reference that could be beneficial for future research. Detection of tooth wear remains challenging, highlighting the need to improve strategies for early intervention.
Objective: The aim of this study was to assess whether the use of a reference splint with guide points on standard teeth, in vivo, shows a reduction in the alignment error of minor tooth wear changes using an intraoral scanner. Materials and Methods: The sample included 10 dental students aged between 22 and 25. Custom splints were made for each participant using BlueSky Plan® software, based on digital 3D models obtained from scanning the maxilla with the 3Shape Trios® scanner. The splints were milled on a milling machine. Initially (t0), intraoral scans were taken with the splint placed in the mouth (CG) and after one month (t1), new scans were taken without (SG) and with the splint (CG). The comparative analysis was carried out using the best-fit alignment tool with 3 alignment strategies: BFall (all teeth), BFpg (splint points) and BFg (complete splint), and the RMS was chosen as the variable to calculate the magnitude of the deviations between the overlapping scans. Results: It was observed that there were no statiscally significant differences between the various alignment strategies using the splint (CGt0-CGt1-BFall, CGt0-CGt1-BFpg and CGt0-CGt1-BFg), nor between them and the analysis without the splint (SGt0-SGt1-BFall). The RMS values of the (CG-SG-BFall) analyses, both for (t0) and for the comparison (t0-t1), were statistically higher (p<0.001) than the other analyses with the same alignment, both with the use of a splint (CGt0-CGt1-BFall) and without it (SGt0-SGt1-BFall). The group with the lowest RMS value was the best-fit on the teeth themselves. Conclusions: The milled splint did not substantially reduce the alignment error, but it did provide a stable reference that could be beneficial for future research. Detection of tooth wear remains challenging, highlighting the need to improve strategies for early intervention.
Descrição
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Palavras-chave
Desgaste dentário Scanner intraoral Goteira Best-fit alignment