Publicação
Soft tissue replication in single unit implant impressions: a three-dimemsional clinical study
| Resumo: | Objective: Validation of a novel technique for comparison of soft tissue replication between conventional and digital impressions for definitive single unit implant rehabilitation in the esthetic zone. Materials and Methods: Six patients were recruited according to inclusion criteria for this cross-over pilot study and submitted to a conventional silicone implant impression with customized coping and a digital impression with an intraoral scanner. Stereolithography files obtained from the same patient were superimposed with appropriate software and trueness evaluated between methods at predetermined locations (56 in hard and soft tissues and 18 in the emergence profile, per patient). Results were presented as mean Root Mean Square 95% confidence interval and effect size calculated with Hedges’g 95%. Mann-Whitney and Kruskal-Wallis were performed when appropriate and α was set at 0.05. Results: Trueness between methods equated to 51.08 [45.68;56.47] µm and 60.46 [52.29;68.62] µm in hard and soft tissues, respectively. Soft tissue replication by intraoral scanner acquisition corresponded to a statistically significant Root Mean Square of 243.89 [209.15;278.63] µm equating to a Hedges’g of 1.52 [1.22;1.82] with corresponded to a large effect size. Conclusion: The proposed technique allows for 3D determination of peri-implant tissues’ changes in digital models with higher sensitivity than visual techniques, thus presenting itself as a promising alternative in clinical studies, and that the use of an intraoral scanner obtained significant differences in the soft tissue emergence profile replication when compared with the gold standard. Clinical Significance: The proposed methodology allows the assessment of changes in digital models with higher sensitivity than visual techniques. Although the use of an intraoral scanner allowed for statistically significant discrepancies when compared to the use of customized implant impression copings, those differences were below the clinical visual threshold. The proposed technique shows promise in future clinical studies to quantify changes in hard or soft tissues. |
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| Autores principais: | Pinto, Ricardo Jorge Marques |
| Assunto: | Saúde oral Teses de mestrado - 2019 |
| Ano: | 2019 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | Objective: Validation of a novel technique for comparison of soft tissue replication between conventional and digital impressions for definitive single unit implant rehabilitation in the esthetic zone. Materials and Methods: Six patients were recruited according to inclusion criteria for this cross-over pilot study and submitted to a conventional silicone implant impression with customized coping and a digital impression with an intraoral scanner. Stereolithography files obtained from the same patient were superimposed with appropriate software and trueness evaluated between methods at predetermined locations (56 in hard and soft tissues and 18 in the emergence profile, per patient). Results were presented as mean Root Mean Square 95% confidence interval and effect size calculated with Hedges’g 95%. Mann-Whitney and Kruskal-Wallis were performed when appropriate and α was set at 0.05. Results: Trueness between methods equated to 51.08 [45.68;56.47] µm and 60.46 [52.29;68.62] µm in hard and soft tissues, respectively. Soft tissue replication by intraoral scanner acquisition corresponded to a statistically significant Root Mean Square of 243.89 [209.15;278.63] µm equating to a Hedges’g of 1.52 [1.22;1.82] with corresponded to a large effect size. Conclusion: The proposed technique allows for 3D determination of peri-implant tissues’ changes in digital models with higher sensitivity than visual techniques, thus presenting itself as a promising alternative in clinical studies, and that the use of an intraoral scanner obtained significant differences in the soft tissue emergence profile replication when compared with the gold standard. Clinical Significance: The proposed methodology allows the assessment of changes in digital models with higher sensitivity than visual techniques. Although the use of an intraoral scanner allowed for statistically significant discrepancies when compared to the use of customized implant impression copings, those differences were below the clinical visual threshold. The proposed technique shows promise in future clinical studies to quantify changes in hard or soft tissues. |
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