Fracture resistance in non-vital teeth: absence of interproximal ferrule and influence of preparation depth in CAD/CAM endocrown overlays - an in vitro study
Author
Barallat, Lucía
Arregui, María
FERNANDEZ-VILLAR, SANDRA
Paniagua, Blanca
Pascual La Rocca, Andres Matteo
Publication date
2022ISSN
1996-1944
Abstract
There is ample evidence to support the use of endocrowns to restore endodontic teeth. However, the influence of the position of the interproximal margins on fracture strength has not yet been studied. The aim was to determine the relationship between the apicocoronal position of the interproximal restorative margins and fracture resistance in nonvital teeth restored with CAD/CAM endocrown overlays. Forty extracted human maxillary premolars were prepared for endocrown overlay restorations without ferrule on the interproximal aspects and classified according to the position of the interproximal restoration margins in relation to the alveolar crest: 2 mm (group A), 1 mm (group B), 0.5 mm (group C), and 0 mm (group D). Fracture strength was measured using a universal testing machine applying a compressive force to the longitudinal tooth axis. Group A had a mean fracture resistance of 859.61 (±267.951) N, group B 1053.9 (±333.985) N, group C 1124.6 (±291.172) N, and group D 780.67 (±183.269) N, with statistical differences between groups. Group C had the highest values for fracture strength compared to the other groups (p < 0.05). The location of the interproximal margins appears to influence the fracture resistance of CAD/CAM endocrown overlays. A distance of 0.5 mm between the interproximal margin and the alveolar crest was associated with increased fracture resistance.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
616.3 - Pathology of the digestive system. Complaints of the alimentary canal
Keywords
Resistència a la fractura
Restauració de superposició
Endocronar
Virolla
Premolars
Resistencia a la fractura
Restauración de superposición
Endocorona
Contera
Premolares
Fracture resistance
Overlay restoration
Endocrown
Ferrule
Premolars
Pages
9
Publisher
MDPI
Collection
15;2
Is part of
Materials
Citation
Barallat, Lucía; Arregui, María; Fernandez-Villar, Sandra [et al.]. Fracture resistance in non-vital teeth: absence of interproximal ferrule and influence of preparation depth in CAD/CAM endocrown overlays - an in vitro study. Materials, 2022, 15(2), 436. Disponible en: <https://www.mdpi.com/1996-1944/15/2/436>. Fecha de acceso: 8 feb. 2022. DOI: 10.3390/ma15020436
This item appears in the following Collection(s)
- Odontologia [228]
Rights
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc/4.0/