Rational tooth preparation for porcelain laminate veneers.
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Preparation of dental hard tissue and fortification of dentures made of NiCr steel and NiCr steel coated with titanium nitride activate gingival fluid secretion. Gold and silver-palladium alloys decrease gingival fluid secretion and promote alleviation of the inflammatory process.
Lately the porcelain laminate veneer in the fore-upper sector of the mouth, has gained popularity due to the multiple advantages that it has shown, therefrom the purpose of describing the different reduction techniques according to the function of the laminate restauration. We describe the instruments that will be used and the sequence that should be carried on during the different types of reduction, classifying them in three large groups according to the anomaly presented by the elements to be restored.
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During high speed cavity preparation the vibration burden of human teeth was evaluated in comparison between turbine- and micromotor-driven handpieces. The acceleration spectra of different burs showed an advantage of the air-driven handpiece.
Self-paced instruction whereby students are provided with learning resources and allowed to learn at their own rate--with or without assistance from instructors--is increasingly being used in dental education. The wide diversity of entering dental student experience with psychomotor tasks suggests that preclinical psychomotor skill development should adapt well to self-paced learning. This study compared self-paced instruction to traditional preclinical teaching of psychomotor skills in cavity preparation. Performance by the self-paced class was significantly better than that of the traditional class on two procedures. There were no significant differences among the other procedures tested.
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