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Evaluation of the Marginal Adaptation in Metal crowns Using cAD/cAM and Manual Wax Patterns

Microscopy Research 2015年第2期3卷 26-32页

作者： Alan Sepulveda-Rodríguez Felipe Guerrero-Martínez césar gaitan-fonseca Takashi Komabayashi Enrique Reyes-Vela David Masuoka Department of Stomatology Universidad Autónoma de Aguascalientes Aguascalientes Mexico Faculty of Dentistry Universidad Autónoma de San Luis Potosí San Luis Potosí Mexico Department of Endodontics West Virginia University Charleston USA

The aim of this study is to evaluate the maximum and minimum distances between the model and the cast crown of three techniques using Scanning Electron Microscopy (SEM). Three technique groups were used for this study: group A (control), traditional manual wax patterns;group B, dipping wax patterns;group c, resin patterns made with cAD/cAM. For each group, 10 samples were made using the same model, and then metal cast. Marginal accuracies of the samples were evaluated by performing gap measurements using SEM with a magnification of 1200× (minimum distance). The data were statistically analyzed using the one-way analysis of variance (ANOVA) at the 0.05 significance level. The average (standard deviation) of the minimum distance [μm] was 22.5 (12.1), 9.9 (4.3), and 14.7 (6.6), in groups A, B, and c, respectively. The average standard deviation of gap area [μm2] was 21667.2 (3476.4), 9906.4 (1512.1), and 16048.8 (8123). In the minimum distance comparison, groups A and B (p = 0.006) showed statistically significant results. In the gap area comparison, there was no statistical significance among groups A, B, and c (p = 0.174). The marginal adaptations of all three techniques were within a reported clinically acceptable range of margin.

关键词： Marginal Adaptation cAD/cAM Metal caps Wax Pattern

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coronal-Radicular Amputation or Hemisection? A Report case in Lower Molar

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Open Journal of Stomatology 2016年第5期6卷 140-143页

作者： Diana Araujo Espino Vicente Esparza cesar gaitan fonseca Area de ciencias de la Salud Universidad Autonoma de Zacatecas Zacatecas Mexico Facultad de Medicina Universidad Autonoma de San Luis Potosi San Luis Potosi Mexico

The coronal-radicular amputation or radicular hemisection is defined as the sectioning fragments coronal-radicular of the lower molar with clinical damage followed endodontic treatment and pros-thetics rehabilitation. This clinical treatment is viable in presence of the radicular decay or furca damage. This is a report case of radicular hemisection of lower molar with decay and bone loss that compromise distal root. The objective was elimination of distal root and conserved mesial root with endodontic and prosthetics treatment.

关键词： Radicular Hemisection Lower Molar Inferior Distal Root

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