Dentinal tubule obliteration using toothpastes containing sodium trimetaphosphate microparticles or nanoparticles

Author(s)

Favretto, Carla Oliveira ^[1] ; Botazzo Delbem, Alberto Carlos ^[1] ; Silos Moraes, Joao Carlos ^[2] ; Camargo, Emerson Rodrigues ^[3] ; Alves de Toledo, Priscila Toninatto ^[1] ; Pedrini, Denise ^{[4, 5]}

Affiliation

^[1] Sao Paulo State Univ Unesp, Sch Dent, Dept Pediat Dent & Publ Hlth, Aracatuba, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Dept Phys & Chem, Ilha Solteira, SP - Brazil

^[3] Fed Univ Sao Carlos UFSCar, Dept Chem, Sao Carlos, SP - Brazil

^[4] Sao Paulo State Univ UNESP, Sch Dent, Dept Surg & Integrated Clin, Aracatuba, SP - Brazil

^[5] UNESP, Fac Odontol, Disciplina Clin Integrada, Campus Aracatuba, Rua Jose Bonifacio 1193, BR-16015050 Aracatuba, SP - Brazil

• Document type: Journal article
• Source: CLINICAL ORAL INVESTIGATIONS; v. 22, n. 9, p. 3021-3029, DEC 2018.
• Web of Science Citations: 0

Abstract

ObjectivesThis in vitro study evaluated the effect of microparticles (TMPmicro) or nanoparticles (TMPnano) TMP associated with fluoride (F) in toothpaste formulations on the obliteration of dentinal tubules (DT).Materials and methodsThe dentinal tubules of bovine dentin blocks were unobstructed by immersion in 37% phosphoric acid solution. Blocks (n=20/group) underwent mechanical brushing (2x/day) during 7days with toothpastes: placebo, 1100ppm F, and 1100 with 3% TMPmicro or 3% TMPnano. After that, ten blocks of each group were immersed in citric acid (pH 3.2) for 1min. The number, diameter and area of unobstructed DT, atomic % of chemical elements from precipitates, and the mineral concentration were quantified. Data were submitted to two-way ANOVA, followed by Student-Newman-Keuls test (P<0.05).ResultsToothpastes containing TMPmicro and TMPnano promoted greater obliteration of DT and greater mineral concentration compared to other groups (P<0.05). Placebo and 1100ppm F group presented similar obliteration but 1100ppm F group promoted higher mineral concentration. Higher Ca/P ratios were observed in groups treated with TMP; the acid challenge reduced Ca/P ratio for all groups. The atomic % of C and N was significantly lower for TMP toothpastes before acid challenge, but increased afterwards.ConclusionsIt was concluded that the addition of TMPmicro or TMPnano to F toothpastes produced greater obliteration of dentinal tubules and higher mineral concentration when compared with 1100ppm F.Clinical relevanceBy the addition of TMP, fluoride toothpastes may occlude the dentinal tubules, with potential to reduce dentin hypersensitivity. (AU)

• FAPESP's process: 13/25531-9 - Evaluation of the obliteration and conductance hydraulic of the dentine tubules using sodium trimetaphosphate toothpaste: in vitro study
• Grantee: Denise Pedrini
• Support Opportunities: Regular Research Grants