Heat Generated by Different Light-Emitting Diode (LED) Curing Units and Their Effect on Pulp: An In Vitro Study.

Introduction: Excessive intensity of light emitted from light-emitting diode (LED) curing units used during orthodontic bonding procedures can induce thermal changes within the pulp chamber, potentially leading to pulpal inflammation or damage. The degree of this thermal effect may vary based on the type and power output of the curing light used. This study aimed to determine the amount of heat generated by different LED curing lights during orthodontic bonding and to evaluate the associated histopathological changes in pulpal tissue.

Evaluation and comparison of microbial colonization on nickel titanium (NiTi) closed coil springs and active tie-backs during orthodontic space closure: An study.

Objective: Literature suggests that the mode of ligation and use of elastomeric chains for achieving orthodontic space closure may result in a significant increase in microbial colonisation. The objective of the present study was to evaluate and compare the rates of microbial colonization on nickel-titanium (NiTi) closed-coil springs and active tie-backs used for orthodontic space closure in the maxillary premolar extraction site.

Materials And Methods: Thirty-two participants, including 14 males and 18 females, were enrolled in the present split-mouth study.