OBJECTIVES: To evaluate the effects of home bleaching ( @entity12946 ) on enamel surface morphology and the degree of acid dissolution. METHODS: Buccal surfaces of 15 caries-free @entity1 premolars were used in the study. The 15 teeth were cut in half in a @entity717 at midline; in total, 15 pairs of specimens were obtained. Group A consisted of five pairs that studied surface morphology change and Group B consisted of 10 pairs that studied the susceptibility of bleached enamel to acid dissolution. Tooth halves were prepared following a @entity1388 -free prophylaxis paste cleaning. One half of the tooth was untreated (control), and the other half was bleached (experimental) for eight hours daily for 10 days using 10% @entity12946 . Tooth samples were then stored in distilled water for seven days, after which @entity4653 ( @entity4653 ) was performed on Group A. Only halves from the same tooth were compared to rule out natural variations between teeth. Group B was etched with 37% @entity8718 before being examined by @entity4653 . The severity of the acid attack was graded from I to V, and the grades of each pair were compared. RESULTS: Results of the @entity4653 observation showed that surface porosity slightly increased after bleaching, and more surface dissolution by @entity8718 was seen with bleached, compared to unbleached, enamel.

Surface changes and acid dissolution of enamel after XXXX bleach treatment.

@entity1 :: ('9606', 'Species') :: ['human'] @entity8718 :: ('MESH:C030242', 'Chemical') :: ['phosphoric acid'] @entity12946 :: ('MESH:C009096', 'Chemical') :: ['carbamide peroxide'] @entity717 :: ('MESH:D009069', 'Disease') :: ['buccal-lingual direction'] @entity1388 :: ('MESH:D005459', 'Chemical') :: ['fluoride'] @entity4653 :: ('MESH:D004401', 'Disease') :: ['scanning electron microscopy', 'SEM']
@entity12946 :: (MESH:C009096,Chemical) :: ['carbamide peroxide']
