Laser use and applications in dentistry has increased dramatically in the last
years. Laser etching of enamel may provide an alternative for conventional acid etching. The aim of this
study was to evaluate, under Scanning Electron Microscope(SEM),
enamel surface morphology after
laser irradiation with or without the addition of photoabsorber (black ink); with or without acid etching.
laser enamel etching produced surface
roughness that might be used for the infiltration and subsequent mechanical retention of resin.
Anatomical features and color characteristics of teeth may affect the recipient
signals' nature during dental pulp oximetry, enamel tissue thickness may consider of the most important
factors. This clinical study aimd to evaluate the effect of enam
el tissue thickness of the upper premolar
crown on the accuracy of dental pulp oxygen saturation readings.
The results of this study indicate that there is a considerable effect of the dental tissue
thickness on the dental pulp oxygenation measurement. So; it is of important to find the suitable
adjustments on the PO apparatus, probe, or programs, in order to gain less effect of the anatomical
variances between teeth, and thus increasing pulse oximetry measurement accuracy.