Where is the protective layer?
Enamel covers the natural tooth crown and protects the dentine beneath. The root instead has an outer layer of cementum.
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What protects the visible crown of a tooth?
Enamel is the highly mineralised outer layer of a natural tooth's crown. It protects the dentine beneath. Its surface can lose and regain minerals. However, a chipped or worn-away piece of enamel does not grow back.
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The hard shell of the tooth crown
Enamel covers the natural crown. It is highly mineralised and protects the dentine beneath. The tooth root does not have this enamel shell.
Even a hard surface can be damaged
Acids can dissolve minerals from enamel. In decay, these acids are produced in the biofilm. How often the surface is exposed influences the balance.
Minerals can return; shape does not simply regrow
Early mineral loss can be partly reversed. Lost tooth shape does not grow back through this process. Protection and treatment depend on the surface's condition.
At a glance
Why can acids damage it?
Even the hard enamel surface can lose minerals. Repeated acid exposure shifts the balance between mineral loss and replacement.
What can recover, and what cannot?
Early mineral loss can be partly reversed. A chipped or worn-away piece of enamel, however, does not grow back.
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Often confused
Enamel or dentine?
Enamel is the outer shell of the tooth crown. Dentine lies beneath it and forms most of the tooth, including the root.
Quick answers
Does the tooth root also have enamel?
No. The outside of the root is covered by cementum, with dentine beneath. Enamel is found on the natural tooth crown.
Can enamel grow back?
Lost pieces of enamel do not grow back. Returning minerals to early lesions is different from rebuilding missing tooth shape.
Does being hard mean being resistant to acids?
No. Acids can dissolve minerals. Saliva and suitable fluoride-containing care support the balance and protect the tooth surface.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
Has only the mineral balance changed here, or has tooth tissue already been lost?
Healthy tooth structures are a foundation for function and aesthetic planning at the practice.
If you notice changes to your tooth surfaces or have questions about enamel, we are happy to advise.
Discuss your tooth surfacesChoose an appointment on DoctolibLearning for dental trainees & teamsUnderstand clinical terms and build your knowledge
Build on the simple explanation with clinical terms, key distinctions and a knowledge question.
- Anatomical crown
- The enamel-covered part of a natural tooth, distinct from the tooth root.
- Hydroxyapatite
- A calcium phosphate mineral that forms a major part of mineralised tooth tissue.
- Hard tooth tissues
- A collective term for enamel, dentine and root cementum.
Know the difference
Minerals can return to remaining enamel. This does not rebuild a lost piece of enamel into a new tooth shape.
Sources and context
Editorial research: 22 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.