Hello,
Upper front tooth erupt by 7 to 8 months and you can wait 3 months after this.
If she is 1.6 yrs then it is of concern.
You will have to get x ray done .
To check whether there is the tooth in lacking eruption.
Or the tooth is missing only .
It may also effect the occlusion, and also the permanent dentition.
Answered2018-08-30 08:31:18
Let others know if this answer was helpful