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Impact of Access Cavity Design on Fracture Resistance of Endodontically Treated Maxillary First Premolar: In Vitro.
Daniel, Anju; Saleh, Abdul Rahman; Al-Jadaa, Anas; Kheder, Waad.
Afiliação
  • Daniel A; Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates.
  • Saleh AR; Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates; Center of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, United Arab Emirates.
  • Al-Jadaa A; Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates; Center of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, United Arab Emirates.
  • Kheder W; Department of Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates.
Braz Dent J ; 35: e245676, 2024.
Article em En | MEDLINE | ID: mdl-38537021
ABSTRACT
This study was designed to investigate the impact of access cavity designs on fracture resistance of endodontically treated maxillary first premolars. The study sample consisted of 72 intact maxillary first premolars, randomly divided into six groups (n = 12). A standardized proximal cavity preparation was prepared for all samples using standard bur. Groups I control group with only standard proximal cavity and no endodontic access, group II Truss access cavity, group III Separated access to buccal and palatal canals without removal of dentine in between, group IV Access to buccal and palatal canals with removal of dentine in between, group V Traditional access cavity, group VI Mesio-occlusal-distal cavity (MOD). For groups I and VI, only composite restoration was used to restore the proximal cavity, while for groups II- V, the access was prepared and endodontic treatment was performed on all teeth, then composite restoration was placed. The root canals were instrumented using nickel-titanium files, irrigated with sodium hypochlorite, and filled with AH plus sealer and gutta-percha using warm vertical condensation. All samples were then placed in an acrylic mold and underwent thermal aging for 10,000 cycles between 5 and 55°C. The samples were fixed in a universal testing machine with the long axis of the roots positioned at 20° to a load applied at a crosshead speed of 1 mm/min using a stainless steel semi-spherical indenter (Ø = 3 mm) until fracture occurred to determine the fracture resistance force in Newton. The normality test (Shapiro-Wilk) showed that data are normally distributed. Group II exhibited the highest mean fracture resistance, and group VI was the least likely to resist the fracture. No statistically significant differences between tested groups (p-value = 0.237). The MOD group showed a more unfavorable mode of fracture compared to other groups. No significant difference in fracture resistance between conservative and traditional access cavities. The missing marginal ridges, such as in MOD cavities played an important role in decreasing the fracture resistance of endodontically treated teeth.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Fraturas dos Dentes / Dente não Vital Limite: Humans Idioma: En Revista: Braz Dent J Assunto da revista: ODONTOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Emirados Árabes Unidos País de publicação: Brasil

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Fraturas dos Dentes / Dente não Vital Limite: Humans Idioma: En Revista: Braz Dent J Assunto da revista: ODONTOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Emirados Árabes Unidos País de publicação: Brasil