Does deep caries without a base need to be refilled?

In general, whether a deep cavity needs to be refilled due to lack of a base depends on the pulp condition and symptoms. If the dental pulp is healthy and there are no discomforts, observation without immediate refilling may be acceptable. However, if there is pain from stimuli or signs of pulp damage, refilling is necessary. The detailed analysis is as follows:

If decayed tissue in a deep cavity has been thoroughly removed and pulp sensitivity tests are normal, with no post-filling discomfort such as sensitivity to cold or heat, or pain upon biting, this indicates that the filling material has not irritated the pulp and the pulp remains healthy. In such cases, there is no need for immediate replacement; regular follow-up examinations to monitor pulp status and filling performance are sufficient.

However, if significant sensitivity to hot or cold, spontaneous pain, or bite discomfort occurs after filling, or if the decay was close to the pulp but no base was placed, stimulation from the filling material may trigger pulpitis. In this case, the filling must be redone—first removing the original material, then applying a pulp-protective lining material to isolate further irritation before refilling, thus preventing further pulp damage.

Daily oral care is essential: brush teeth with fluoride toothpaste morning and night, and use dental floss to clean interdental surfaces. Reduce intake of sugary and acidic foods to prevent progression of decay. Schedule a dental check-up every six months to one year to ensure early detection and timely treatment of cavities, maintaining long-term dental health.