Toxicity of Pulpispad using four different cell types.

Area of Science:

• Biomaterials Science
• Dental Materials
• Cell Biology

Background:

• Zinc oxide-eugenol (ZOE) formulations are common in dental applications.
• Evaluating the biocompatibility of dental materials is crucial for clinical success.
• Previous assessments of ZOE-based pastes have shown variable cytotoxicity.

Purpose of the Study:

• To assess the in vitro cytotoxicity of a specific zinc oxide-eugenol-based paste (Pulpispad).
• To evaluate the cytotoxic effects of Pulpispad on various human cell lines at different setting times.
• To determine the suitability of Pulpispad for future clinical applications based on its biocompatibility.

Main Methods:

• In vitro evaluation of Pulpispad cytotoxicity.
• Incubation of L929 cells, gingival, periodontal ligament, and pulpal fibroblasts with Pulpispad.
• Cytotoxicity assessment using the 51Cr-release method after 4 and 24 hours of incubation.
• Evaluation of material cytotoxicity after setting for 1 day and 1 week.

Main Results:

• Pulpispad exhibited high cytotoxicity across all tested cell lines.
• The cytotoxic effect persisted even after the material had set for 1 week.
• Differential sensitivity was observed among cell lines, with diploid cells sometimes being less sensitive than aneuploid cells.

Conclusions:

• Pulpispad is not recommended for clinical application due to its significant in vitro cytotoxicity.
• The choice of cell lines for biomaterial evaluation is critical, as varying sensitivities can influence results.
• Further research into cell line selection is necessary for accurate biocompatibility assessments.