In general, the teething process occurs twice in the course of life. The first dentition is called deciduous or is commonly known as milk dentition, which begins in the first months of life.
The teeth begin to form from pregnancy, approximately in the sixth week of gestation, and it goes until approximately 17 to 21 years when the third molars or wisdom teeth erupt.
The eruption of permanent teeth is a process that develops around 6 years of age.