[Comparative study on the apical root resorption between self-ligating and conventional brackets in extraction...

Area of Science:

• Orthodontics
• Dental Materials Science

Background:

• External apical root resorption (EARR) is a common side effect of orthodontic treatment.
• Self-ligating brackets are designed to reduce friction and potentially mitigate EARR.

Purpose of the Study:

• To investigate if self-ligating brackets, using light force, can reduce external apical root resorption (EARR) compared to conventional ligation brackets.
• To quantify EARR in incisors during orthodontic treatment with different bracket systems.

Main Methods:

• A comparative study involving 30 patients with Class I or II malocclusion requiring first premolar extraction.
• Patients were divided into two groups: 15 treated with self-ligating brackets (Damon 3MX) and 15 with conventional ligation brackets.
• EARR of maxillary and mandibular incisors was measured from pre- and post-treatment radiographs and models.

Main Results:

• No statistically significant difference in the overall amount of EARR was observed between the self-ligating and conventional bracket groups.
• Specific measurements for maxillary central and lateral incisors, as well as mandibular central and lateral incisors, showed no significant variations between the groups (P > 0.05 for all comparisons).

Conclusions:

• The choice between self-ligating and conventional brackets does not appear to influence the extent of external apical root resorption in orthodontic extraction treatments.
• Clinicians can expect similar levels of root resorption regardless of the bracket system used in these specific treatment scenarios.