Scanning electron microscope analysis of working ends of standard and modified Gracey curettes.

Context: Gracey curettes are the most frequently used manual instruments in periodontal treatments.

Aim: This study aimed to evaluate morphology of working ends of standard and modified Gracey curettes no. 1-2.

Toothbrush-Dentifrice Abrasion of Dental Sealants: An In Vitro Study.

Objective:  This study sought to investigate the toothbrush-dentifrice abrasion of dental sealants.

Materials And Methods:  Weight loss (∆W) and depth loss (∆D) were used as abrasion indicators. Sealant samples from nine products were soaked in dentifrice slurry and abraded by using a toothbrushing machine with a brushing force of 300 g.

A study on light transmittance through red protective shields modified with different window films.

Objectives/aims: This study aimed to improve effectiveness of red protective shields in filtering unwanted light using window films.

Materials And Methods: Red protective shields were modified by placing V-Kool (VK), Scotchtint (ST) or Hüper Optik (HP) window films on both sides. Percentage transmittance (%T) of light with a wavelength of 190-990 nm was determined using a double-beam ultraviolet (UV) and visible spectrophotometer.