Intrapulpal temperature variation during bleaching with various activation mechanisms

Intrapulpal Temperature Variation during Bleaching with Various Activation Mechanisms

OBJECTIVES The aim of this study was to evaluate the intrapulpal temperature variation after bleaching treatment with 35% hydrogen peroxide using different sources of activation. MATERIAL AND METHODS Twenty-four human teeth were sectioned in the mesiodistal direction providing 48 specimens, and were divided into 4 groups (n=12): (G1) Control - Bleaching gel without light activation, (G2) Blea...

Ex-vivo evaluation of the intrapulpal temperature variation and fracture strength in teeth subjected to different external bleaching protocols.

This study evaluated the influence of bleaching protocols on intrapulpal temperature and fracture strength of the bleached teeth. Ninety maxillary incisors were assigned to 9 groups (n=10): G1: 35% carbamide peroxide (35% CP), G2: 38% hydrogen peroxide (38% HP), G3: halogen light, G4: LED-laser, G5: 35% CP + halogen light, G6: 38% HP + halogen light, G7: 35% CP + LED-laser, G8: 38% HP + LED-las...

Intrapulpal temperature during preparation with the Er:YAG laser: an in vitro study.

OBJECTIVE This investigation evaluated the variation of the intrapulpal temperature when dentine was irradiated by the Er:YAG laser. BACKGROUND DATA The effect of preparation with the Er:YAG laser on the intrapulpal temperature is probably the biggest problem in using the laser for preparation of dental hard tissue. MATERIALS AND METHODS Seventy-two bovine incisors were studied that had the...

EFFECT OFACID ACTIVATION ON STRUCTURALAND BLEACHING PROPERTIES OFABENTONITE

 A natural bentonite obtained from Khorasan, Iran, was submitted to acid activation with sulphuric acid. Sample aliquots (5gr)were leached with 100 ml H2SO4 solutions of various concentrations (2–7N) at 80±2 oC for 2 hours. X–ray diffraction, chemical analysis, infrared spectroscopy and specific surface area measurements were performed in order to evaluate important structural modifications occ...

Temperature Stress and Coral Bleaching