First temporary or milk teeth appear in children at the age of 6-9 months - central incisors. In 12-15 months erupt molars, and in 1.5 years - canines. Till 2-2.5 years the child must have 20 temporary teeth. In 5-6 years, the permanent teeth begin to erupt. They gradually replace milk teeth. This process is completed till the age of 14. Temporary and permanent teeth have similar structure. Temporary teeth also have root canals. Temporary teeth are susceptible to the same diseases as the permanent: dental caries, pulpitis, and periodontitis. Endodontists in Kentucky specialize in root canal treatment of primary teeth.