+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Three-dimensional biomechanical study of functional stresses in composite restorations of masticatory teeth

Three-dimensional biomechanical study of functional stresses in composite restorations of masticatory teeth

Folia Medica 53(4): 60-65

The aim of the present work was to study and evaluate the intensity of stresses in the adhesive bond in composite restorations of masticatory teeth after light-curing, under temperature changes and masticatory loads. Data for the 3D model generation of a maxillary premolar were obtained during a routine CT head scan. Thirty-three cross-sections of tooth 25 were selected and used to create a 3D geometric model enmeshed using the finite element method (FEM) (made up of 106556 elements and 608724 nodes). The pulp cavity and the periodontal ligament were constructed in the same way and integrated into the premolar model. Eight cavity configurations with converging walls were designed, resistant to masticatory forces (enamel/dentin = 1/1). A comparative computer simulation was carried out of the polymerization shrinkage forces of the composite material (CM), temperature changes in the oral cavity and functional masticatory loads. The distribution of the generated stress on the adhesive bond was evaluated in eight different class I and II cavity configurations. The location of crack formation was assessed in the cases of rupture of the adhesive bond. In all cavity configurations, stress concentration in the adhesive layer is higher at the interface with the dental tissues. Low temperatures (5 degrees C) generate forces that are greater than the strength of the adhesive bond in all studied cavity configurations. The distribution of the generated stresses under the effect of axial and tangent forces of 300 N is similar to that under the effect of temperature factors. The axial masticatory forces have a pronounced adverse effect on the adhesive bond in all cavity configurations. Low temperatures and axial masticatory forces play an important role for the marginal integrity. They exacerbate the adverse effects of polymerization shrinkage in composite restorations of masticatory teeth.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 056569131

Download citation: RISBibTeXText

PMID: 22712087

Related references

Three-dimensional analysis of cavity wall deformation after composite restoration of masticatory teeth. Folia Medica 53(4): 53-59, 2012

A comparison of stresses in molar teeth restored with inlays and direct restorations, including polymerization shrinkage of composite resin and tooth loading during mastication. Dental Materials 31(3): E77-E87, 2014

Five-year retrospective clinical study of indirect composite restorations luted with a light-cured composite in posterior teeth. Clinical Oral Investigations 18(2): 615-624, 2015

Polymerization contraction stresses of resin-based composite restorations within beveled cavity preparations of Class I restorations. American Journal of Dentistry 16(2): 139-143, 2003

The influence of cavity shape on the stresses in composite dental restorations: a finite element study. Computer Methods in Biomechanics and Biomedical Engineering 5(5): 343-349, 2003

Effect of Extension and Type of Composite-Restored Class II Cavities on Biomechanical Properties of Teeth: A Three Dimensional Finite Element Analysis. Journal of Dentistry 12(2): 140-150, 2015

Cervical microleakage in composite restorations of primary teeth--in vitro study. Journal of Dentistry 33(8): 627-632, 2005

Marginal leakage in direct and indirect composite resin restorations in primary teeth: an in vitro study. Journal of Dentistry 36(5): 322-325, 2008

Three-year clinical evaluation of class II posterior composite restorations placed with different techniques and flowable composite linings in endodontically treated teeth. Clinical Oral Investigations (): -, 2016

Planning extensive esthetic restorations for anterior teeth: use of waxed-up study casts and composite resin mock-ups. General Dentistry 64(1): E6-E9, 2016

A study of effect of the cavity wall texture on the marginal leakage of composite resin restorations in bovine teeth. Tsurumi University Dental Journal 14(2): 263-284, 1988

Handling of mechanical stresses in composite restorations. Dental Update 25(7): 274-279, 1999

Fracture resistance of endodontically treated teeth restored with indirect composite inlay and onlay restorations - An in vitro study. Saudi Dental Journal 28(1): 49-55, 2016

Stresses and strains on the common boundary surface and strength of composite rock masses acted by three-dimensional compressive stresses. Proceedings - Symposium on Rock Mechanics 26: 993-997, 1985

Does layering minimize shrinkage stresses in composite restorations?. Journal of Dental Research 82(12): 967-971, 2003