Influence of dental crown topography on fracture resistance of premolars with MOD preparation and subjected to different restorative protocols
| Autor: | Carulina Bueno de Mesquita, Tiago André Fontoura de Melo, Rafael Melara, Luiz Henrique Burnett, Simone Bonato Luisi |
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| Rok vydání: | 2021 |
| Předmět: |
Resistance test
Orthodontics medicine.medical_specialty Materials science Crowns medicine.medical_treatment 0206 medical engineering Fracture test 030206 dentistry 02 engineering and technology Endodontics 020601 biomedical engineering Crown (dentistry) Restorative treatment 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure stomatognathic system Mod medicine Premolar Fracture (geology) Humans Bicuspid General Dentistry |
| Zdroj: | Australian endodontic journal : the journal of the Australian Society of Endodontology IncReferences. 47(3) |
| ISSN: | 1747-4477 |
| Popis: | To evaluate whether dental crown topography influences the fracture resistance of premolars treated endodontically and with MOD preparation subjected to different restorative protocols. Sixty-four human premolars with one or two roots in equal numerical proportions (n) were selected and randomly divided into four groups (n = 8): (S = single-rooted; D = double-rooted) SS: sound single-rooted; SNR: endodontics (E) + MOD cavity preparation; SR: E + MOD + resin restoration (RS); SP: E + MOD + RS + horizontal zirconia post (ZP); DS: sound double-rooted; DNR: E + MOD; DR: E + MOD + RS; and DP: E + MOD + RS + ZP. After allocation to the groups, the samples were thermocycled and then subjected to the fracture resistance test. Failures after the fracture test were classified as irreparable (with pulp floor fracture) or reparable (without pulp floor fracture). Data were analysed using one-way anova and the Tukey test (α = 0.05). Single-rooted premolars were more resistant to fracture than double-rooted premolars. The restorative treatment using a horizontally transfixed zirconia post improved fracture resistance, resembling that of a healthy tooth. |
| Databáze: | OpenAIRE |
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