A comparative evaluation of fracture resistance of endodontically treated teeth, with variable marginal ridge thicknesses, restored with composite resin and composite resin reinforced with Ribbond: An in vitro study

Autor: Hemalatha Hiremath, Jitendra V Kalburge, Shaikh Shoeb Yakub, Vaishali Kalburge, Anshu Chandurkar
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Dental Stress Analysis
Time Factors
Materials science
Root canal
medicine.medical_treatment
Composite number
Dentistry
Composite Resins
Dental Materials
Tooth Fractures
Composite resin
Acid Etching
Dental
stomatognathic system
Ribbond
Materials Testing
medicine
Dentin
Humans
In vitro study
Bicuspid
Bisphenol A-Glycidyl Methacrylate
Phosphoric Acids
Dental Restoration
Permanent
General Dentistry
Tooth Crown
Tooth
Nonvital
Universal testing machine
business.industry
universal testing machine
Temperature
General Medicine
fracture resistance
Ridge (differential geometry)
Dental Polishing
Root Canal Therapy
lcsh:RK1-715
medicine.anatomical_structure
Dentin-Bonding Agents
lcsh:Dentistry
Fracture (geology)
Stress
Mechanical
Polyethylenes
Dental Cavity Preparation
business
Dental restoration
marginal ridge
Zdroj: Indian Journal of Dental Research, Vol 24, Iss 2, Pp 193-198 (2013)
ISSN: 1998-3603
0970-9290
Popis: Background: The anatomic shape of maxillary premolars show a tendency towards separation of their cusps during mastication after endodontic treatment. Preservation of the marginal ridge of endodontically treated and restored premolars can act as a strengthening factor and improve the fracture resistance. Objectives: To evaluate the effect of varying thickness of marginal ridge on the fracture resistance of endodontically treated maxillary premolars restored with composite and Ribbond reinforced composites. Materials and Methods: One hundred and twenty, freshly extracted, non carious human mature maxillary premolars were selected for this experimental in vitro study. The teeth were randomly assigned in to twelve groups ( n = 10). Group 1 received no preparation. All the premolars in other groups were root canal treated. In subgroups of 3 and 4, DO cavities were prepared while MOD cavities were prepared for all subgroups of group 2, the dimensions of the proximal boxes were kept uniform. In group 3 and 4 the dimensions of the mesial marginal ridge were measured using a digital Vernier caliper as 2 mm, 1.5 mm, 1 mm and 0.5 mm in the respective subgroups. All samples in groups 2.2 and all the subgroups of 3 were restored with a dentin bonding agent and resin composite. The teeth in group 2.3 and all subgroups of 4 were restored with composite reinforced with Ribbond fibers. The premolars were submitted to axial compression up to failure at 45 degree angle to a palatal cusp in universal testing machine. The mean load necessary to fracture was recorded in Newtons and the data was analysed. Results: There was a highly significant difference between mean values of force required to fracture teeth in group 1 and all subgroups of group 2, 3 and 4 (i.e., P < 0.01) Conclusion: On the basis of static loading, preserving the mesial marginal ridge with thicknesses of mm, 1.5 mm, 1 mm and 0.5 mm, composite restored and Ribbond reinforced composite restored maxillary premolars can help preserve the fracture resistance of teeth.
Databáze: OpenAIRE
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