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Avaliação da progressão de desgaste dentário de atrição nos caninos com um scanner 3D intra-oral : estudo in vivo
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Abstract(s)
Objetivo: O estudo teve como objetivo avaliar a capacidade de um Scanner Intra-oral, na análise qualitativa e quantitativa do desgaste dentário em pacientes com atrição, sujeitos a reabilitação adesiva para restauração da guia canina.
Materiais e Métodos: Sete pacientes da Clínica Dentária Egas Moniz foram convidados a participar no estudo, dos quais 2 foram excluídos no decurso da investigação por fraturas nas restaurações realizadas. Realizaram-se scans intra-orais iniciais (ti) de todos os participantes com o scanner Cerec Primescan, Denstply Sirona, sendo posteriormente realizada a reabilitação adesiva direta com resina composta Filtek™ Supreme XTE e o sistema adesivo OptiBond™ FL, para restauração da guia canina. Foram realizados novos scans após a reabilitação (t0) e ao fim de 1 (t1) e 3 (t3) meses. Realizou-se a conversão das imagens tridimensionais obtidas com o scanner em ficheiros STL, sendo posteriormente feita análise dos mesmos para os 5 pacientes, com recurso ao programa de análise tridimensional Geomagic® Control XTM (3D Systems, Darmstadt, Germany). Calculou-se para cada scan o volume em mm3 dos dentes caninos restaurados e, para fins de análise estatística, determinou-se para t1 e t3 a % de volume relativo (% vol rel) em relação a t0.
Resultados: Observou-se uma tendência para aumento de volume entre ti e t0, decorrente da restauração dos dentes neste último ponto, seguido por um decréscimo em t1 e t3. A % vol rel para t3 revelou-se estatisticamente inferior à observada em t1 (p<0,001). Não se observaram diferenças significativas de variação de % vol rel, nem entre os vários dentes (p = 1,0), nem entre a maxila e mandíbula (p = 0,875).
Conclusão: Dentro das limitações do presente estudo in vivo, foi possível concluir que a utilização do scanner Cerec Primescan, permitiu detetar a perda de progressiva de volume dos dentes caninos restaurados devido à atrição.
Objective: The study aimed to evaluate the capacity of an Intra-oral Scanner for the qualitative and quantitative analysis of tooth wear in patients with attrition, undergoing adhesive rehabilitation for restoration of the canine guide. Materials and Methods: Seven patients from Clínica Dentária Egas Moniz were invited to participate in the study. Two were excluded during the study due to fractures in the restored canines. Initial intraoral scans (ti) of all participants were made with the Cerec Primescan scanner, Denstply Sirona. Then, direct adhesive restorations with resin composite Filtek™ Supreme XT and the adhesive system OptiBond™ FL, were performed to restore the canine guide. New intraoral scans were made after the rehabilitation (t0) and after 1 (t1) and 3 (t3) months. The three-dimensional images were converted into STL files, which were later analyzed using the three-dimensional analysis program Geomagic® Control XTM (3D Systems, Darmstadt, Germany). The volume in mm3 was calculated for each restored canine, and for the statistical analysis, the % of volume (% vol rel) for (t1) and (t3) was calculated relative to (t0). Results: There was a trend towards an increase in volume between ti and t0, resulting from the restoration of teeth at this last point, followed by a decrease in volume at points t1 and t3. The % vol rel for t3 was statistically lower than that observed for t1 (p<0.001). There were no significant differences in the variation of % vol rel, neither between the various teeth (p = 1.0), nor between the maxilla and mandible (p = 0.875). Conclusion: Within the limitations of the present in vivo study, it was possible to conclude that the use of the Cerec Primescan scanner, allowed detecting the progressive volume decrease of the restored canines over the time, due to the action of attrition.
Objective: The study aimed to evaluate the capacity of an Intra-oral Scanner for the qualitative and quantitative analysis of tooth wear in patients with attrition, undergoing adhesive rehabilitation for restoration of the canine guide. Materials and Methods: Seven patients from Clínica Dentária Egas Moniz were invited to participate in the study. Two were excluded during the study due to fractures in the restored canines. Initial intraoral scans (ti) of all participants were made with the Cerec Primescan scanner, Denstply Sirona. Then, direct adhesive restorations with resin composite Filtek™ Supreme XT and the adhesive system OptiBond™ FL, were performed to restore the canine guide. New intraoral scans were made after the rehabilitation (t0) and after 1 (t1) and 3 (t3) months. The three-dimensional images were converted into STL files, which were later analyzed using the three-dimensional analysis program Geomagic® Control XTM (3D Systems, Darmstadt, Germany). The volume in mm3 was calculated for each restored canine, and for the statistical analysis, the % of volume (% vol rel) for (t1) and (t3) was calculated relative to (t0). Results: There was a trend towards an increase in volume between ti and t0, resulting from the restoration of teeth at this last point, followed by a decrease in volume at points t1 and t3. The % vol rel for t3 was statistically lower than that observed for t1 (p<0.001). There were no significant differences in the variation of % vol rel, neither between the various teeth (p = 1.0), nor between the maxilla and mandible (p = 0.875). Conclusion: Within the limitations of the present in vivo study, it was possible to conclude that the use of the Cerec Primescan scanner, allowed detecting the progressive volume decrease of the restored canines over the time, due to the action of attrition.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Desgaste dentário Scanner intra-oral Diagnóstico Reabilitação