Statistical relationship of morsal to bucco-lingual, approximal and sulcal caries in rats.

The correlation of morsal with sulcal, bucco-lingual and approximal caries scores of rats was compared. The morsal and bucco-lingual plus approximal correlation was significantly better than the morsal with sulcal correlation. When reporting rat caries, sulcal scores should be reported alone; morsal scores should be grouped with bucco-lingual and approximal to demonstrate total smooth surface lesions.