mom denying acess to dental records?

With joint legal custody you have the legal right to take your daughter to a dentist or see her dentist records. If you know who her dentist is then they should already have your daughter's medicaid card on file and be able to do a check up.

Not taking her to the dentist is not not enough reason to file for sole legal custody but her inability to co-parent or promote a relationship with you is a possibility. The judge wants to see a "substantial change in circumstances" to look at modifying custody. I would keep track of every visit she denied you and whether or not she is allowing you access to the child's school records or even making decision regarding which school she goes to. You are supposed to have just as much legal right to make major decisions for your daughter as she is. Keep a list of dates and detailed information. All of it adds up. Fight for more time with your daughter, like every Sunday and Wednesday evening. The judge isn't going to want to give you sole legal custody if your daughter spends most of her time with her mother. He isn't going to want to change her address unless you can prove abuse, but you can take her back to court to enforce the current court order.