Comparative evaluation of fracture resistance of teeth restored with different types of restorative material- An in vitro study.
Journal Title: International Journal of Dental Science and Innovative Research (IJDSIR) - Year 2019, Vol 2, Issue 3
Abstract
The development of adhesive dental materials resulted in good chemical bonding to tooth structure. However, they are still lacking in color s stability and strength in oral environment over a long period of time. Duo to these disadvantages of dental materials, amalgam restoration is still preferable as the restorations of choice for posterior region. The use of adhesive resins to increase the retention, resistance and marginal seal of amalgam restoration has gained a strong foothold in restorative dentistry. The advantage of bonded restoration is the conservation of tooth structure as well as tooth reinforcement. The aim of the study was to investigate and compare the fracture resistance of conventional amalgam restoration with bonded amalgam, pin retained amalgam restoration and composite restoration and influence of bonded amalgam restoration on the fracture resistance of mandibular molars and to determine whether bonding amalgam are suitable alternative to the pin retained amalgam restoration system. Seventy five extracted mandibular molars were randomly divided in to five groups including one control group. A mesio-occlusal preparation including lingual cusp was performed on all the teeth. Group 1 serves as negative control group with no tooth preparation. Group 2 were restored with conventional restoration. Group 3 were restored with bonded amalgam restoration. Group 4 were restored with pin retained amalgam restoration. Group 5 were restored with posterior composite (Micro hybrid) restoration. All the specimens were mounted in acrylic block and thermocycled. Each specimen was loaded in compression at 90 degree angle in an Instron testing machine with cross head speed of 5mm/min. The load required to fracture the teeth were graphically recorded in Newton and data obtained were subjected to statistical analysis.
Authors and Affiliations
Dr. Surya Narayan Rai
Keywords
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