Background and aims.

  Biocompatibility of root-end filling materials is a matter of debate. The aim of this study was to compare the biocompatibility of a variety of commercial ProRoot WMTA cements and a resin-based cement (Geristore®) with different pH values of setting reaction and different aluminum contents, implanted into the subcutaneous connective tissue of rats at various time intervals.

  Materials and methods.

  Fifty Sprague-Dawley rats were used in this study. Polyethylene tubes were filled with Angelus WMTA, ProRoot WMTA, Bioaggregate, and Geristore. Empty control tubes were implanted into subcutaneous tissues and harvested at 7-, 14-, 28- and 60-day intervals. Tissue sections of 5 μm were stained with hematoxylin and eosin and observed under a light microscope. Inflammatory reactions were categorized as 0, none (without inflammatory cells) 1, mild (inflammatory cells ≤25) 2, moderate (25–125 inflammatory cells) and 3, severe (>125 inflammatory cells). Statistical analysis was performed with Kruskal-Wallis and Mann Whitney U tests.

Results.

 ProRoot WMTA and Angelus elicited significantly less inflammation than other materials (P< 0.05). After 7 days, however, all the materials induced significantly more inflammation than the controls (P< 0.05). Angelus-MTA group exhibited no significant differences from the Bioaggregate group (P=0.15) however, ProRoot WMTA elicited significantly less inflammation than Bioaggregate (P=0.02). Geristore induced significantly more inflammation than other groups (P< 0.05).

 Conclusion.

 Geristore induced an inflammatory response higher than ProRoot WMTA therefore, it is not recommended for clinical use.

 Source: Journal of Dental Research, Dental Clinics, Dental Prospects

 Full Text