Diode Laser Research Paper

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The use of lasers in general dentistry for various soft tissue and hard tissue procedures has become more common in the past two decades .In orthodontics, lasers are mainly used for enamel surface preparation before bonding, curing the bonding material and debonding the brackets.19, 24, 28 One of the advantages of enamel preparation with laser over conventional acid etching is the removal of smear layer along with the etching procedure.75 Lasers cause melting and recrystallization of the enamel surface resulting in numerous pores similar to those found in the type III etching pattern produced by orthophosphoric acid.11 Hence, laser can be successfully used as a method to etch the enamel surfaces. The tissue reaction of lasers is primarily photothermal, which …show more content…

Various studies have reported an increase in intra Pulpal temperature above the acceptable limit of 5.5ºC with Nd: YAG and Diode lasers.67 The Intra Pulpal temperature rise was reported to be well below the acceptable limit for CO2 and super pulse Co2 lasers, but the bond strength produced was inferior to that of acid …show more content…

However the critical limit of 5.5°C is exceeded with the use of diode laser at 7W, ruling out its use in clinical practice with these above laser setting.25 A diode laser de-bonding of ceramic brackets by thermal softening at 5W irradiation has increased the intrapulpal temperature above the mean threshold of 5.5°C set by Zach and Cohen due to the higher frequency rate.28 The parameters such as energy output, frequency, and duration, can influence the amount of heat produced on the surface of laser irradiation. The advantage of Er, Cr: YSGG hydrokinetic system is that most of the hard tissue procedures can be done under 6W where as for etching the enamel below 2W power output is

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