Delayed Teething in a 7-Month-Old Infant
A 7-month-old infant with no teeth yet is within the normal range of development and does not require intervention or workup at this time. 1
Normal Teething Timeline
- Infants typically begin teething at an average age of 6 months, but the normal range extends considerably beyond this. 1
- The first teeth (primary dentition) emerge over a period that can vary widely between healthy infants, and by age 3 years all primary teeth should have erupted. 1
- At 7 months of age, the absence of visible teeth does not indicate pathology or developmental delay. 1
When to Consider Further Evaluation
Dental evaluation is not indicated at 7 months for absence of teeth alone. However, certain red flags would warrant referral:
- Establish a Dental Home within 6 months of the eruption of the first tooth (not at a specific chronological age). 2
- Consider referral to a pediatric dentist if the infant has a possible oral abnormality such as visible gingival masses, asymmetric gum appearance, or craniofacial anomalies. 2
- Anodontia (complete absence of all teeth) is extremely rare and typically associated with congenital diseases such as ectodermal dysplasia, which would present with other clinical features beyond just delayed teething. 2
Reassurance and Anticipatory Guidance
Provide parents with reassurance that teething timing varies widely among healthy infants. 1
- When teeth do begin to emerge, parents may observe mild symptoms including increased biting, drooling, gum-rubbing, irritability, and mild temperature elevation. 3
- Important: Serious symptoms such as high fever (>102°F), diarrhea, vomiting, rashes beyond the face, or respiratory symptoms should never be attributed to teething alone and require evaluation for other causes. 4, 3
- No teething infant in prospective studies had fever of 104°F or life-threatening illness attributable to teething. 3
Common Pitfall to Avoid
Do not order radiographic imaging or extensive workup for a 7-month-old with no teeth and no other concerning features. Radiographic dental evaluation is not recommended before age 6 years unless there are specific clinical indications such as suspected numerical anomalies, trauma, or oral abnormalities. 2