Enamel surface evaluation after bracket debonding and different resin removal methods

Abstract

OBJECTIVE: To assess enamel surface under scanning electron microscopy (SEM) after resin removal and enamel polishing procedures following brackets debonding, as well as compare the time required for these procedures. METHODS: A total of 180 deciduous bovine incisors were used. The enamel surface of each tooth was prepared and brackets were bonded with light cured Transbond XT composite resin. Brackets were removed in a testing machine. The samples were randomized and equally distributed into nine groups according to the resin removal and polishing technique: Group 1, 30-blade tungsten carbide bur in high speed; Group 2, 30-blade tungsten carbide bur in high speed followed by a sequence of 4 Sof-lex polishing discs (3M); Group 3, 30-blade tungsten carbide bur in high speed followed by Enhance tips (Dentsply). All groups were subdivided into (a) unpolished; (b) polished with aluminum oxide paste; and (c) polished with water slurry of fine pumice. Subsequently, the enamel surface was assessed and statistical analysis was carried out. RESULTS: There were statistically significant differences in enamel roughness and removal time among all groups. Groups 3a, 3b and 3c appeared to be the most efficient methods of removing resin with low damages to enamel. Groups 2a, 2b and 2c were the most time consuming procedures, and Group 2a caused more damages to enamel. CONCLUSION: The suggested protocol for resin removal is the 30-blade tungsten carbide bur in high speed followed by Enhance tips and polishing with aluminum oxide paste. This procedure seems to produce less damages and is less time consuming.

Auxiliary UV light devices for removal of fluorescent resin residues after bracket debonding

“…7 Nevertheless, even Sof-Lex discs may damage the enamel, 3 only medium, fine, and superfine discs were used and the use of a polishing paste as a final procedure is considered essential to reducing abrasive marks. 19 The resin removal produced similar aesthetically pleasing enamel surfaces with both methods. The authors suggest that the clinical time reduction between the reported and traditional techniques for bracket debonding must be analyzed in the future, improving expectations for the use of these methodologies in clinical practice.…”

“…For the current patient, silicone rubber polishers and polishing discs, which are less aggressive than other methods such as Arkansas stone and lasers, were used . Nevertheless, even Sof‐Lex discs may damage the enamel, only medium, fine, and superfine discs were used and the use of a polishing paste as a final procedure is considered essential to reducing abrasive marks …”

Novel Digital Technique to Quantify the Area and Volume of Cement Remaining and Enamel Removed after Fixed Multibracket Appliance Therapy Debonding: An In Vitro Study

“…Some authors analyzed the cement removal procedures for maintaining the enamel surface integrity and highlighted tungsten carbide burs at high or low speeds [1,15,16], laser [17], fiberglass drills [18], and ultrasound [15,19]. The final remaining cement is polished with a rubber cup and diamond paste or aluminum oxide paste [14,15].…”

Damage on tooth enamel after removal of orthodontic adhesive by Arkansas’ stone and tungsten carbide burs

“…Several shapes of low or high speed burs such as tungsten carbide, Arkansas' stones, Sof -Lex ® discs, and special finishing systems composed of zirconia or pumice slurries are used to remove composite adhesive after bracket detachment. 5,10,11 Technological improvement of burs has been performed, each time less aggressive to the enamel. The use of multi -step procedures involving fine tungsten carbide burs and ultra -fine grinding discs coated with alumina are the first choice to be considered on the removal of composite adhesives.…”

“…However, the multi -step procedures seem to be more time -consuming and can result in a variation of enamel roughness. 10,12 Polishing systems, including rubber cups embedded with diamond particles and silicon carbide brushes are used to enhance the enamel roughness resulting in a smooth appearance. 13,14 Those procedures involving burs or rubber cups produce different degrees of polishing and can promote abrasion followed by a significant loss of enamel.…”