In vivo remineralization of acid-etched enamel in non-brushing areas as influenced by fluoridated orthodontic adhesive and toothpaste.
This study aimed to evaluate the in vivo remineralization of acid-etched enamel in non-brushing areas as influenced by fluoridated orthodontic adhesive and toothpaste. One hundred and twenty teeth from 30 volunteers were selected. The teeth were assigned to four treatments: no treatment (negative control); 37% phosphoric acid-etching (PAE) (positive control); PAE + resin-modified glass ionomer cement (RMGIC); and, PAE + composite resin. Patients brushed teeth with fluoridated (n = 15) or non-fluoridated (n = 15) toothpastes, so that etched enamel was protected with screens and it was not in contact with the brush bristles. Remineralization was evaluated by means of laser fluorescence (LF), environmental scanning electronic microscopy, and energy dispersive spectrometry after extraction. The LF means were compared by means of Wilcoxon and Mann Whitney tests. Environmental scanning electron microscopy scores were compared among the groups using a Kruskal Wallis test, whereas the Ca/P ratio was evaluated by means of an Analysis of Variance with subparcels (treatments) and Tukey's post-hoc test. There were no statistically significant differences between the tooth pastes and between the orthodontic adhesives evaluated. Most teeth presented only partial enamel remineralization. Therefore, the fluoride released by the RMGIC was not enough to cause increased crystal regrowth in the acid-etched enamel. The use of fluoridated toothpaste did not provide positive additional effect.
Department of Dentistry, School of Dentistry, Potiguar University, Laureate International Universities, Natal, Brazil.
Otávio José
OJ
Praxedes-Neto
Boniek Castillo Dutra
BC
Borges
Cícero
C
Florêncio-Filho
Arthur Costa Rodrigues
AC
Farias
John
J
Drennan
Kenio Costa
KC
De Lima
D000134:Acid Etching, Dental; D003738:Dental Cements / Q000627:therapeutic use*; D003743:Dental Enamel / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D005461:Fluorine / Q000627:therapeutic use*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D014089:Tooth Remineralization; D014100:Toothpastes / Q000008:administration & dosage*
D003738:Dental Cements; D014100:Toothpastes; D005461:Fluorine