3-Dimensional topographic enamel surface changes after different debonding techniques for aligner attachments: a...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Orthodontic Technology

Background:

• Orthodontic aligner attachments require effective debonding methods.
• Composite resin types influence enamel surface topography post-debonding.
• Understanding 3D topographic changes is vital for enamel preservation.

Purpose of the Study:

• To evaluate 3D enamel topographic changes after debonding aligner attachments.
• To compare different debonding methods and composite resin types.
• To assess enamel surface roughness and morphological alterations.

Main Methods:

• 88 premolar teeth with vertical attachments were divided into flowable and packable composite resin groups.
• Two debonding methods (fiberglass vs. carbide burs) were applied.
• Enamel demineralization, residual composite volume, and surface roughness were quantified using micro-CT and specialized software.

Main Results:

• No significant difference in residual composite volume between composite resin groups.
• Group 2A (packable resin, fiberglass debonding) showed significantly higher enamel demineralization than Group 2B (packable resin, carbide burs).
• Fiberglass debonding (Group 1A and 2A) resulted in significantly higher enamel roughness parameters compared to carbide burs (Group 1B and 2B).

Conclusions:

• Fiberglass pliers yielded smoother enamel surfaces than carbide burs.
• Carbide burs, however, led to significantly less enamel demineralization.
• The choice of debonding method impacts enamel surface integrity, with fiberglass posing a higher risk of demineralization.