From the Guidelines
It is normal for a baby not to have teeth at 9 months. While many babies get their first tooth between 4-7 months of age, there is significant variation in the timing of tooth eruption. Some babies may not get their first tooth until 12-14 months, which is still considered within the normal range of development. Genetics plays a major role in determining when teeth appear, so if parents or siblings were late teethers, the baby may follow that pattern. Premature babies may also experience delayed tooth eruption. As long as your baby is developing normally in other ways—gaining weight appropriately, reaching other developmental milestones, and showing signs of tooth development like drooling, chewing on objects, or having swollen gums—there is typically no cause for concern.
The American Academy of Pediatrics recommends continuous developmental surveillance throughout childhood, with additional screenings performed whenever concerns are raised by parents, child health professionals, or others involved in the care of the child 1. However, the provided evidence does not specifically address tooth eruption at 9 months.
In terms of oral health, the American Academy of Pediatric Dentistry recommends that the first oral examination occur within six months of the eruption of the first primary tooth but by no later than 12 months of age 1. This suggests that tooth eruption can vary significantly, and some babies may not have teeth at 9 months.
Key points to consider:
- Genetics play a role in tooth eruption timing
- Premature babies may experience delayed tooth eruption
- Babies develop at different rates, and some may not get their first tooth until 12-14 months
- If concerned, discuss with a pediatrician or pediatric dentist by 15-18 months to rule out potential issues.
From the Research
Normal Dental Development
- The eruption of teeth in infants can vary, and it is not uncommon for some babies to have no teeth at 9 months 2.
- Infancy is a critical time for the formation of habits, including oral health habits, and positive habits such as twice-daily brushing with fluoride toothpaste can help establish a lifelong healthy practice 2.
Teething Signs and Symptoms
- Parents often believe that teething is associated with certain signs and symptoms, such as the desire to bite, and may use various methods to alleviate these symptoms 3, 4.
- However, some of these beliefs and practices may be incorrect or even harmful, highlighting the need for education and guidance from healthcare providers 4.
Oral Health in Infancy
- Oral health is an integral part of overall health, and dental caries is a common and chronic disease process that can have significant consequences 5.
- Pediatricians and other healthcare providers play an important role in promoting oral health and preventing dental caries in young children, including those with no teeth 5.
Tooth Eruption
- The studies do not provide specific information on the normal age range for tooth eruption, but they do emphasize the importance of oral health and hygiene practices from an early age 2, 6.
- Further research is needed to fully understand the process of tooth eruption and the factors that influence it 6.