Comparison of wet weight total CFU, S mutans and PH changes of plaque collected from composite fillings and natural teeth

In this in-vivo study carried out in the Department of Operative Dentistry, Nishtar Medical College, Multan, plaque from two different types of the composite fillings and that from natural teeth was compared by cultivation of CFU and S. mutans and pH measurements. It was observed that CFU per milligram of plaque from different sources varied. S. mutans was cultivated from plaque of Heliosit and natural teeth. pH drop was seen in plaque collected on Hospital. Despite the presence of S. mutans in plaque of natural teeth a rise in pH was observed

Amount and total viable bacteria of plaque from 3 different composite resins

The present study was designed to evaluate the differences in amount of plaque and number of viable bacteria in plaque from three different [macro-filled, micro-filled and hybrid] composite resins. An intra-oral appliance was used. Appliances were worn by ten volunteers for a period of 7 days for each material. Results revealed that macro-filled resins collected more plaque. The rougher samples collected more plaque as compared to the smoother counterpart of the same material. The samples which had more amount of plaque gave smaller member of viable bacteria