A crown is a specific restoration that places a 'cap' on an existing natural tooth, or on top of a dental implant. They are often needed when a large area of decay has penetrated deep into the tooth and there is no longer sufficient tooth structure to support a simple filling. While crowns are critical for maintaining as much natural tooth structure as possible, they can also offer significant strength and cosmetic advantages.
Cosmetic bonding is the use of a composite filling material to smooth out, fill in chips, gaps, or recreate tooth structure. In the right situation, the results can be impressive and can alleviate the need for a veneer.
In some scenarios, internal bleaching can be a fantastic alternative to a crown or veneer. Not only is it less invasive, it's less expensive as well. If you've had a tooth that's had trauma or a root canal and has begun changing color, this might be the best option for you.