What does a filling restore?
It fills a defect to restore the shape and function of the affected tooth area. A direct filling is shaped and hardened at the tooth.
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What does a filling do in a tooth?
A dental filling replaces missing tooth tissue, for example after decay or a small fracture. It restores the shape and function of the affected area. The material and technique depend on the defect and the forces it bears.
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A defect in the tooth tissue
Decay or a broken piece can leave a defect. An examination shows whether a filling is suitable and how much healthy tooth tissue can be preserved.
The defect is given shape again
A direct filling is shaped and hardened in the tooth. An inlay, by contrast, is made outside the mouth and then fitted.
Contacts and bite must fit
Finally, the shape and tooth contacts are checked. A filled tooth still needs daily cleaning and check-ups: decay can recur at the junction with the filling.
At a glance
When does a tooth need a filling?
Missing tissue after decay or a small fracture can be restored this way. Early decay without surface breakdown, however, does not automatically need a filling.
What is checked after placement?
The restoration's shape, contacts with other teeth and bite must fit. The filling margins remain important during cleaning and check-ups afterwards.
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Often confused
Filling or inlay?
Both replace tooth tissue. Direct fillings are made in the tooth. An inlay is made outside the mouth and then attached.
Quick answers
Does early decay always need a filling?
No. For early changes without surface breakdown, measures such as fluoride application may be suitable. The stage must be assessed at the practice.
Does the German word “Plombe” mean something different from a filling?
“Plombe” is an everyday German term for a dental filling. It does not tell you which material was used.
Should an older filling be replaced as a precaution?
Age alone does not decide this. The practice assesses defects, symptoms and the condition of the tooth and filling margins, among other factors.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
How large is the defect, and which type of filling suits the remaining tooth tissue?
Fillings are part of the general treatment services. The choice is matched to the existing tooth tissue and function.
An unusual area on a tooth or filling can be examined, and a suitable restoration planned together.
Have a tooth or filling checkedChoose 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.
- Cavity
- A defect, or a space prepared for a restoration, within a tooth.
- Direct restoration
- A restoration placed and shaped directly in the defect inside the mouth.
- Proximal contact
- Contact between neighbouring teeth; its shape must be considered when restoring the side of a tooth.
Know the difference
Caries describes the disease; a cavity is a defect in tooth tissue. A filling replaces missing tissue, but does not automatically eliminate the causes of an increased decay risk.
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.