No first tooth

Eh, don't worry lah, plenty of babies delay teething, my friend's daughter didn't get her first tooth until 14 months and she's perfectly fine now! Most babies start between 6 to 12 months, tapi ada jugak yang lambat sikit and it's totally normal. Since he's hitting one year without any sign, probably good idea to mention it to your paediatrician at the next visit just to make sure everything's on track, but seriously most of the time it's nothing lah.