Dark spot on dental crown. Could it be a cavity?

In root canal treated teeth with insufficient tooth tissue, covering the tooth with a crown provides a longer lasting solution as it will prevent possible fractures in the future. However, crown materials offer a weaker connection than natural teeth for the attachment of orthodontic brackets....

"Considering your dental situation, it's evident that your front teeth are experiencing considerable wear, and coupled with the underbite you have, it's crucial to address this issue comprehensively. In my experience, I would consider zirconia crowns as a primary option in this case. Zirconia...

Hello..Refund is not a common way in those circumstances. Mostly recementation is being done at first. But if the problem does not resolve, the crown may be redone again with no charge.