[Comparison of root resorption between self-ligating and conventional brackets using cone-beam CT]

Area of Science:

• Orthodontics
• Dental Biomaterials
• Periodontology

Background:

• Root resorption is a common side effect of orthodontic treatment.
• The type of bracket used may influence the extent of root resorption.
• Passive self-ligating brackets are increasingly popular, necessitating comparison with conventional systems.

Purpose of the Study:

• To compare external apical root resorption in maxillary incisors between passive self-ligating and conventional brackets.
• To evaluate the association between passive self-ligating bracket use and root resorption.
• To determine if passive self-ligating brackets increase root resorption compared to conventional brackets.

Main Methods:

• Fifty patients were randomized into two groups: passive self-ligating brackets or conventional straight wire brackets (0.022 system).
• Cone-beam computed tomography (CBCT) scans were acquired pre- and post-treatment.
• External apical root resorption of maxillary incisors was quantified using CBCT images, with statistical analysis performed using Student's t test.

Main Results:

• No statistically significant difference in the amount of external apical root resorption was observed between the passive self-ligating bracket group and the conventional bracket group (P > 0.05).
• Both bracket types were associated with some degree of root resorption, but the difference was not significant.

Conclusions:

• Both passive self-ligating and conventional orthodontic brackets have the potential to cause root resorption.
• There is no significant difference in the incidence or severity of root resorption between these two types of brackets.
• Passive self-ligating brackets do not appear to induce greater root resorption than conventional brackets.