Prevalence location and patency of accessory canals in primary molars using dye penetration under vacuum suction technique--an in vitro study.

A study conducted on 120 primary molars (30 each of maxillary and mandibular 1st and 2nd molars) to find out the prevalence, location and patency of accessory canals and furcation formina using safranin red dye revealed the presence of accessory canals in 46 teeth (38.33 percent) with the major site being the furcation and furcation region.