Comparación in vitro de la fuerza de adhesión sobre esmalte de brackets Clarity estándar (Transbond XT 3M) con los brackets Clarity APC Plus (3M), mediante una prueba de cizallamiento

摘要

In an attempt to save time during brackets´ bonding, manufacturers createdmetal and ceramic brackets that have been precoated with the adhesive material. Theadhesive used on the precoated brackets (APC) is similar in composition to that usedfor bonding uncoated brackets. The difference is essentially in the percentages of thevarious ingredients incorporated in the adhesive material. The purpose of this study isto determine if the APC Plus brackets have better shear bond strength than theClarity standard brackets. Forty-five recently extracted human first inferior premolarswere mounted in acrylic bases and these two types of brackets were bondedaccording to the manufacturer´s instructions. The shear bond strength was producedby the MTS machine of universal forces. The current findings indicated that: (1) theClarity APC Plus brackets didn´t have higher shear bond strength than the Claritystandard brackets. (2) The Clarity standard and the Clarity APC Plus brackets didn´thave any statistically significant difference in the shear bond strength. (3) All bracketadhesivesamples provided clinically acceptable shear bond forces.