Comparision of Shear Bond Strength of Stainless Steel and Ceramic Brackets at 24 Hours after Etching Enamel with Different Proportions of Acidulated Phosphate Fluoride

Abstract

Aims and Objectives:To evaluate and compare the shear bond strength of stainless steel brackets and ceramic brackets at 24h after etching the enamel with acidulated phosphate fluoride gel (1.23% APF) at different proportions (40%,30%,20%) incorporated in conventional etchant (37% phosphoric acid). Materials and Methods:Eighty premolars (maxillary and mandibular first and second premolars) extracted for orthodontic purpose has been selected for the study and samples were divided into 4 groups containing 10 teeth each. Comprised of teeth etched Group 1 with 40% of APF gel etchant is Group 2 teeth etched with 30% of APF gel in Group 3 teeth etched with 20% of APF gel etchant and Group 4 teeth were etched with conventional etchant (37% phosphoric acid).

Effects of Ozone and Prophylactic Antimicrobial Applications on Shear Bond Strength of Orthodontic Brackets

“…For instance, Charles et al (21) demonstrate enamel pre-treatment methods such as conventional acid etching, air abrasion, and bur abrasion, finding the bond strength of conventional acid etching and bur abrasion to be higher than that of air abrasion. Prabhakar et al (22) also compared conventional etching with different proportions of acidulated phosphate fluoride, finding that the conventional etching group showed the highest bond strength. In another study, Prasad et al (23) investigated the effect of moisture, saliva, and blood contamination, concluding that contamination reduces shear bond strength.…”

Effect of different bonding techniques on the debonding characteristics of ceramic brackets

“…Recent literature reports that even mechanically retained ceramic brackets have greater bond strengths than metal brackets. [3][4][5] Enamel damage and bracket fracture are common complications with debonding of ceramic brackets, which are attributed to the high bond strength combined with the low fracture toughness of ceramics. 3,4,6 Bracket breakage may result in eye injury, ingestion, or aspiration of bracket fragments.…”