Hello Robinson,
Thanks for posting your query.
As per the details provided,you were wearing
splint to prevent grinding of teeth.
This has lead into jaw deterioration due to imbalanced occlusion or biting.
I would suggest you to use either side of the jaws equally/simultaneously,without applying pressure on a single side.
If required,the splint has to be removed.
You can also try jaw movement exercises.
avoid too much of wide mouth opening.
hope this helps.