Desensitizing Effect and Tooth Color Change After Using Giomer-based Varnish Versus Bioactive Glass Air Polishing in Treating Cervical Hypersensitive Lesions

"Giomer varnish (PRG barrier coat) will used as the intervention agent in this study. , Giomer is considered as a hybrid material between the resins modified glass ionomers and the composite resins. It is composed of 45% Sio2, 24.5% Na2O, 24.5% Ca O and 6% P2O5~. The presence of sodium is very important due to its bioactivity while the phosphate is responsible for the degree of degradation and formation of apatite. Based on this composition, giomer has several clinical applications in implant, periodontics, bone generation, pulp capping, Root canal treatment, as restorative materials, in air abrasion, enamel remineralization and finally dentin hypersensitivity"