The criteria of 1 year and 2 months old baby’s teething can be divided into three aspects: the number of teeth, the order of teething and the shape and arrangement of teeth. If the baby is found to have abnormalities, parents need not worry too much, each baby’s development is different, it is recommended to go to the hospital for examination before processing. 1, the number of teeth: 1 year 2 months old baby teeth number should be 8-12. There are 20 baby teeth, which start to erupt 6-8 months after birth and come out at 30 months. If 13 months has not yet teething, for late teething, if this situation, consider may be the baby lack of calcium or vitamin D caused, can be under the guidance of the doctor to choose calcium and vitamin D to supplement; 2, teething order: 1 year and 2 months of the baby teething standards should be in the order of the growth of the lower central incisor, upper central incisor, upper lateral incisor, lower lateral incisor, as well as part of the baby’s upper and lower jaw began to grow out The first milk molar; 3, tooth shape and arrangement: normal 1 year and 2 months baby teeth should not have enamel underdevelopment, misshapen jaws and other problems. Parents must pay attention to the cleanliness and hygiene of baby’s teeth. After breastfeeding, a clean gauze or toothbrush dipped in water can be used to wipe baby’s teeth. Usually, you can also take your baby to the sun more often, which can promote the production of vitamin D in the body, thus increasing the efficiency of calcium absorption and transformation, and help your baby to develop good habits of clean mouth from the age of 0.