Journal of Conservative Dentistry
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Year : 2003  |  Volume : 6  |  Issue : 1  |  Page : 8-12

Comparative Evaluation Of Resistance Form Of Class II Cavity Designs; Restored With Silver Amalgam With And Without Bonding Agent – An In Vitro Study

Correspondence Address:
Sumeeth Sharma

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Source of Support: None, Conflict of Interest: None

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Dental Amalgam still remains the most widely used posterior restorative material, ease of use and cost effectiveness. One of the primary shortcoming of amalgam is its inability to bond to tooth structure. To retain the restoration in the cavity healthy tooth structure has to be sacrificed. Hence this in vitro study was under taken to evaluate the resistance form of different class II cavity designs, restored with silver amalgam with and without the use of bonding agent. 84 freshly extracted teeth were selected for the study. They were divided into 4 major groups I, II, III and IV of 21 teeth each, depending on different cavity designs. Each group was further subdivided into 3 sub groups A, B, C having 7 teeth in each sub group depending on the different restorative procedures. They were then subjected to universal testing machine. The results were statistically analyzed. When the mean failure loads in Newton was considered, group II i.e. cavities with retentive grooves and those restored without the use of amalgam bond or bond plus i.e. sub group B and C required higher load to fracture the restoration. However the adhesive failure was seen at the junction of tooth restoration in cavities without retentive grooves and when restored without the use of adhesive liner. The study concludes the grooves, amalgam bond, bond plus provides significant level of resistance to dislodgement for Class II amalgam restoration.

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