I suspect DS2 who is 20mths old may have chipped a small fragment off of one of his bottom front teeth. I haven't been able to get a really good look as he is keeping his mouth clamped tightly shut but the top edge of the tooth doesn't look as straight as it used to. He has a fall yesterday which could account for it. Do I need to take him to a dentist or is it something that can just be left. He's got another 4 teeth coming through painfully so a dentist is going to have his work cut out for him trying to get DS2 to open his mouth!