The purposes of this clinical trial is to evaluate two composite resins used to restore Class I and Class II cavities in teeth of adults. The clinical study will evaluate the resin composite restorations placed in Class I and Class II cavity preparations for anatomic form, color match, marginal integrity, marginal discoloration, proximal contact, polishability, caries, sensitivity, gingival index, staining,wear, and thermal response for 24 months..