The dentine surfaces of samples in subgroup I showed a well formed smear layer partially or completely occluding the dentinal tubules.
The dentine surfaces of a few samples in subgroup B showed a uniform, well-formed smear layer while those of other teeth showed an amorphous layer with accumulation of debris.
At some places, a regular and cracked surface with little smear layer was observed with presence of bacteria while at other places a rough and irregular surface was observed.
The smear layer produced in dentine affected by caries possesses acid-resistant crystals that may hinder the diffusion of primer into the intact underlying dentine.
Etching will successfully remove the smear layer
that is basically tooth mud.
Furthermore, when used in combination with EDTA, Aquatine EC was also highly effective at removing the smear layer
In this regard, whereas erbium lasers efficiently remove organic material and smear layer and have a bactericidal effect, the Nd:YAG and diode lasers also exert an effective decontamination action.
The erbium laser has a number of useful attributes: bactericidal capacities, the ability to remove the smear layer and open the dentinal tubules, allowing hybrid layer formation, and then to seal and fuse them.
Additionally, cavity preps done with the Waterlase(TM) have no smear layer
and have up to a 50% increased bond strength.
2009], while others, such as the World Health Organization (WHO), recommend the dilution of the acid with water in order to remove the dentine smear layer [Frencken et al.
Moreover, it may be argued as to whether a smear layer is actually formed when hand instruments are used.
Because of the above arguments, the aim of this study was to assess the efficiency of different polyacrylic acid concentrations, by SEM, on smear layer removal in primary teeth.