In general, dentists are expected to follow ethical guidelines and submit accurate claims for the services they provide. Most dentists are honest and fair in their billing practices. However, just like in any profession, there may be a minority who engage in fraudulent practices, such as overcharging insurance.

Instances of overcharging can include:

Billing for services not performed: Claiming for a service that was never provided to the patient.
Upcoding: Billing for a more expensive service than the one actually performed.
Unbundling: Separating components of a procedure and billing them individually instead of using a bundled code, resulting in higher overall charges.
It's essential for patients to review their billing statements, explanation of benefits (EOB) from their insurance company, and communicate with both their dental office and insurance provider if they suspect any discrepancies or overcharging.

Insurance companies also have systems in place to monitor and audit claims to identify potential fraudulent activities. If you suspect any fraudulent billing practices, you can report your concerns to your insurance company or the appropriate dental regulatory board in your country or region.

Overall, the majority of dentists adhere to ethical billing practices, but it's crucial for patients to stay informed about their dental treatments and charges to ensure they receive accurate and fair billing.