'I haven't smiled since I was a kid without my hand over my face,' he said.
Now, Moore's Facebook profile photo features the toothy grins of not only his children, but him, too, the Daily Mail reports.
'Today was a first....actually pulling off a smile makeover without the patient even knowing....,' Wilstead wrote with the post.
Wilstead explained how he came across Moore randomly on the social networking site and noticed his lack of smile.
Today was a first....actually pulling off a smile makeover without the patient even knowing....😅😆
A year ago, I was...
Posted by Kenny Wilstead on Tuesday, 18 September 2018
Moore's 'before' photo showed badly decayed teeth across the front of his mouth, that seemed like they were barely hanging on.
'I offered my services to fix his smile and he said that he had so many issues and was hopeful to get them fixed but was unable to get off work,' Wilstead wrote.
'He completely forgot about me while an entire year went by and then he got a tooth ache. His boss chose to send him to my office to get his back tooth pulled and gave him a day off to do it.'
As luck would have it for Moore, Wilstead has an excellent memory.
'I remembered who he was when I saw him AND I remembered what I offered him a year ago,' Wilstead wrote.
'He didn't recognise that it was me who made that offer but I decided to make good on it either way.'
Wilstead said he 'secretly numbed way more of [Moore's] mouth than normal for a single tooth extraction.'
He confessed: 'Then I proceeded to do an entire smile makeover without him knowing or even giving me permission to.'
The procedure took two hours to complete, Wilstead said, with Moore's priceless reaction caught on camera when it was all said and done.
'He then sent me pics of how happy his kids were when they saw their dad smiling for the first time in their lives,' Wilstead said.
This isn't the first time Wilstead has done something like this for a person in need, but it was the first time he did it without the person even knowing.
Moore said he thinks what Wilstead does is 'awesome' and never thought it would happen for him, until it did.