heather - even though everything's fine
(yay!) i just thought i'd say that while bumps may be a sign of malocclusion, i would imagine this would be due to root elongation and you'd usually get overgrown teeth before you get the roots. the vet would be able to see maloccluted teeth as well.
and bumps may have other causes
i'm paranoid as well, i have a rescue chin with teeth problems, she had loads of spurs and she actually stopped eating before her xray (she couldn't have had the xray as soon as i got her because she was too weak to go under anaesthetic) so it was a very tense day when she actually went in. i half expected them to call and say 'we're really sorry but the kindest thing would be to put her to sleep while she's under' but they had good news
she also has a chronic jaw bone infection which has caused her bone to elongate downwards so she pretty much has a tusk but it doesn't bother her and hopefully it will not cause any problems in the future.