Human pulpal response to citric acid cavity cleanser

Area of Science:

• Dental materials science
• Restorative dentistry
• Pulp biology

Background:

• Dental restorations often involve cavity preparation and the use of various materials.
• Citric acid is sometimes used as an etchant in dental procedures.
• The potential toxicity of cavity cleansers on dental pulp requires thorough investigation.

Purpose of the Study:

• To evaluate the toxicity of a citric acid cavity cleanser on human dental pulp.
• To compare the effects of citric acid pretreatment versus sham treatment before zinc oxide-eugenol cement restoration.

Main Methods:

• Human dental pulp samples were treated with citric acid cavity cleanser or a sham treatment.
• Restoration was performed using zinc oxide-eugenol cement after pretreatment.
• Histological analysis was conducted to assess pulp inflammation, odontoblast integrity, and dentinal tubule changes.

Main Results:

• Citric acid cavity cleanser significantly increased the intensity and incidence of pulp inflammation compared to controls (P < .01).
• Pretreatment with the cleanser led to destruction of odontoblast processes within dentinal tubules.
• An increase in the diameter of dentinal tubules was observed following cleanser application.

Conclusions:

• Citric acid cavity cleanser exhibits toxicity to human dental pulp.
• The observed damage to dentin and odontoblasts likely contributes to adverse pulp responses.
• Careful consideration of cavity cleanser agents is crucial in restorative dental procedures.