[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Dentistry](https://durgical.com/en/dentistry/) › [Restorative dentistry and materials](https://durgical.com/en/dentistry/areas/restorative/) › Minimal intervention: when to drill and when not # Minimal intervention: when to drill and when not - Topic Not every cavity needs a filling. Early caries can be stopped without drilling, and when a filling is needed, as much healthy tooth as possible is kept. Updated Nov 12, 2026 ## Key points - Caries is a biofilm disease: treat the cause, not only the hole. - Non-cavitated lesions are arrested, not drilled. - Selective removal near the pulp, a sealed restoration, and repair before replacement. ## What it is Minimal intervention dentistry treats caries as a disease of the biofilm, not just a hole to fill. It has four steps: find the disease early and judge the patient's risk, stop and reverse early lesions without drilling, remove only the tissue that must go when a restoration is needed, and repair rather than replace old restorations. Every restoration starts a cycle of re-treatment, each one larger, so the best restoration is the one that is not needed yet. ## Key facts - A non-cavitated lesion (white spot, intact surface) can remineralise with fluoride, biofilm control and less sugar: it is monitored, not drilled. - Sealants and resin infiltration can stop early lesions in pits and between teeth. - Selective caries removal leaves soft, affected dentine over the pulp under a sealed restoration, to avoid exposing the pulp. - The outer, infected dentine is removed; the inner, affected dentine can remineralise once sealed off from sugar. - Atraumatic restorative treatment (ART) uses hand instruments and glass ionomer, without electricity or a drill, useful in the community and in children. ## In clinical practice - Drilling a lesion that could have arrested weakens the tooth for life and starts the restoration cycle. - A restoration does not cure caries: without diet, hygiene and fluoride changes, new lesions appear at its margins. - Repairing a defective margin keeps more tooth than replacing the whole filling and is often as durable. ## Next step / Initial management - Assess caries risk (diet, fluoride, saliva, past caries) and record lesions as active or inactive, cavitated or not. - Non-cavitated lesions: fluoride varnish, sealant or infiltration, diet and hygiene advice, and review. - Cavitated lesions, pain or deep lesions near the pulp: refer to the dentist for selective removal and a sealed restoration. ## Test yourself Think of the answer, then tap the question to see it. ## What is done with a non-cavitated white-spot lesion in a low-risk patient? It is monitored and arrested with fluoride, biofilm control and less sugar; it is not drilled. ## Why is soft dentine sometimes left over the pulp in a deep cavity? Selective removal avoids exposing the pulp; once sealed under a restoration the remaining affected dentine can harden and bacteria lose their sugar supply. ## What does ART stand for and what material does it use? Atraumatic restorative treatment: hand instruments and a glass ionomer cement, without a drill. [Add to my cards (3)](https://durgical.app/estudiar/?add=/en/dentistry/minimal-intervention-when-to-drill-and-when-not/) ## Connections ## Related 5 - [How caries forms: biofilm, sugar and demineralisation](https://durgical.com/en/dentistry/how-caries-forms-biofilm-sugar-and-demineralisation/) - [Classifying caries: by site, depth and activity](https://durgical.com/en/dentistry/classifying-caries-by-site-depth-and-activity/) - [Cavity classes and preparation principles](https://durgical.com/en/dentistry/cavity-classes-and-preparation-principles/) - [Glass ionomer cements](https://durgical.com/en/dentistry/glass-ionomer-cements/) - [Preventing caries: fluoride, sealants and diet](https://durgical.com/en/dentistry/preventing-caries-fluoride-sealants-and-diet/) ## Related conditions 1 - [Dental caries](https://durgical.com/en/conditions/dental-caries/) ## In Pharmacology 1 - [Fluoride](https://durgical.com/en/pharmacology/fluoride/) [← All of dentistry](https://durgical.com/en/dentistry/) Educational content; it does not replace assessment by a dentist or doctor and is not a clinical instruction. For facial or neck swelling with difficulty swallowing or breathing, a knocked-out tooth or bleeding that will not stop, go to an emergency department at once. Sources: [Minimally Invasive Therapies for the Management of Dental Caries: A Literature Review](https://pmc.ncbi.nlm.nih.gov/articles/PMC8700643/) (Dentistry Journal (PMC open access), 2021); [Guiding Caries Removal Through Biological Principles: A Narrative Review on Selective Caries Tissue Preservation](https://pmc.ncbi.nlm.nih.gov/articles/PMC13351430/) (International Dental Journal (PMC open access), 2026); [Dental Caries Diagnostic Testing](https://www.ncbi.nlm.nih.gov/books/NBK574510/) (StatPearls Publishing (NCBI Bookshelf), 2023); [Pit and Fissure Sealants](https://www.ncbi.nlm.nih.gov/books/NBK448116/) (StatPearls Publishing (NCBI Bookshelf), 2025). ## **Spotted a mistake?** We are always improving for the community. Tell us what is wrong and our team will review it. Report a mistake Representative model, for educational purposes only. --- Source: https://durgical.com/en/dentistry/minimal-intervention-when-to-drill-and-when-not/ License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/dentistry/minimal-intervention-when-to-drill-and-when-not/