Replacement of restorations occupies half the general practitioners time and represents substantial expenditure.These are not only financial loss for patients but also further destruction of the teeth.the aim of this study was to report the reasons for replacement of Amalgam and Composite restorations which provides useful guidance on treatment planning and future material development.
Method:
The study was based on cross_sectional method and non_probability sampling.70 patients were being studied whose secondary tooth repair were necessary.The information recorded in questionnaire reported the patients age,tooth number,the class of restorations,the restorative material used,oral hygiene level and the reasons for replacement of amalgam and composite restorations.The data were statistically analyzed through T_student test.
Result:
The average age of the patients were 37 years,70 patients had 82 teeth needed restoration replacement.68/89% of amalgam restored teeth belonged to the lower jaw and 31/11% to the upper jaw.In composite restored teeth 51.85% belonged to the upper jaw and 48/15% to the lower jaw.In both jaws 77.78% restored teeth were in anterior region and 22/22% were in posterior region. Of the amalgam restorations, most were replaced to restore Class I and Class V and class II preparations (47.82%,42.03% and 10.15% respectively).Of the composite restorations, most were replaced in Class II,class I,class III cavities (35.14%,32.43% and 16.22%respectively).the reasons of restoration replacement in amalgam group was 43.59% secondary caries,5.13% crack in tooth structure,16.67% crack in filling material,14.10% tooth structure fracture,11.54% filling material fracture.In composite group 27.45% secondary caries,84% crack in filling material,17.65% tooth structure fracture,23.53% filling material fracture and 21.57% color changing.
Conclusion:
The results indicates that secondary caries was the most prevalent reason for replacement of restorations, regardless of material.This information stresses the importance of selecting a better treatment plan and also the need for the optimal oral hygiene necessary for patients receiving the restorations.