Laser in endodontic pdf

Show related SlideShares at end. WordPress Shortcode. Share Email. Top clipped slide. Download Now Download Download to read offline. Dr Jagadeesh Kodityala Apr. Jagadeesh Kodityala Follow. Consultant Endodontist at Hyderabad. Laser in Endodontic Dentistry. Lasers in dentistry. Lasers and Its Use In Dentistry. Lasers in Dentistry. Laser Dentistry. Laser in Dentistry. Related Books Free with a 30 day trial from Scribd. Dry: A Memoir Augusten Burroughs.

Related Audiobooks Free with a 30 day trial from Scribd. Dr Jagadeesh Kodityala 1. Townes - MASER microwave amplification by stimulated emission of radiation , by means of ammonia gas and microwave radiation.

Ali Javan - first gas laser with Helium Neon. Active medium This consists of chemicals that fill the core of the optical cavity , when stimulated the active medium emits laser light.

This may be flash light, arc light or an electromagnetic coil. Optical resonator This consists of two parallel mirrors placed at each end of the optical cavity. Laser light that is produced by the stimulated active medium is bounced back and forth in the optical cavity by these mirrors which amplifies the light beam. Cooling unit Heat is generated as a by-product To dissipate this heat, air or water — assisted coaxial coolants are provided in the unit Delivery system The laser light may be delivered by a quartz fiberoptic, a flexible hollow wave guide or a handpiece Control panel This provides control over the power output Amplification Reflective Mirror Partially transmissive mirror Pulse durations can range from tenths of a second to several hundred microseconds.

Eg: CO2, and diode lasers Very short bursts of laser energy is emitted due to the flash lamp pumping mechanism. Laser beam pointer Class II Low powered visible lasers that are hazardous only when viewed directly for longer than seconds, e. He—Ne lasers. Class IIb Low powered visible lasers that are hazardous when viewed for more than 0. Class IIIa Medium powered lasers that are normally hazardous if viewed for less than 0. Class IIIb Medium powered lasers that can be hazardous if viewed directly.

Reflection results in little or no absorption, so that there is no thermal effect on the tissue. Transmission of light transfers energy through the tissue without any interaction and thus does not cause any effect or injury. When scattered, light travels in different directions and energy is absorbed over a greater surface area, producing a less intense and less precise thermal effect Need an account?

Click here to sign up. Download Free PDF. Laser in Endodontics Part 2. Stefano Benedicenti. A short summary of this paper. The importance of this technique should not be underestimated. Owing to its affinity to tissues richest in water pulp and carious tissue , the laser allows for a minimally invasive access because it is selective into the pulp chamber and, at the same time, allows for the decon- tamination and removal of bacterial debris and pulp tissue.

Access to the canal orifices can be accom- plished effectively after the number of bacteria has been minimised, thereby avoiding the transposition of bacteria, toxins and debris in the apical direction during the procedure.

Chen et al. In fact, despite the recognised ablative effect of Erbium lasers and nm on hard tissue, Preparation of the access cavity their effectiveness in the preparation of root canals appears to be limited at the moment and does not The preparation of the access cavity can be per- correspond to the endodontic standards reached with Fig.

Note the extensive areas of dentinal melting and bubbles. Shoji et al. The SEM observations demons- contain ledges, irregularities and charring with the trated a uniformly cleaned dentinal surface at the risk of perforations or apical transportation.

In effect, apex of the coronal portion, with an absence of pulp canal shaping performed by Erbium laser is still a residue and well-cleaned dentinal tubules. One such study is that of Berutti Matsuoka et al. Images courtesy of Prof Vasilios Kaitsas. Note the typical pattern of laser ablation, both on the organic and inorganic dentine.

This modifications in bacteria cells. The initial damage marked difference in penetration is due to the low and takes place in the cell wall via changes in the osmotic varying affinity of these wavelengths for hard tissue. The study by Benedicenti et al. Today, it is advisable Decontamination with medium infrared laser to perform this procedure in a canal filled with endodontic irrigant preferably, EDTA or citric acid; Considering its low efficacy in canal preparation alternatively, NaClO to reduce the undesirable and shaping, using the Erbium laser for decontami- thermal morphological effects.

The 3-D decontamination of the endodontic sys- tem with Erbium lasers is not yet comparable to that of near infrared lasers. The thermal energy created by these lasers is in fact absorbed primarily on the surface high affinity to dentinal tissue rich in water , Fig.

The radial tip near and medium infrared lasers. George and Walsh than drilling during root canal preparation, and this was claimed that laser activated irrigation had a higherrisk of corroborated by Moogi et al. However, some apical extrusion, leading to the development of the studies have reported the side effects of using lasers in photon-initiated photoacoustic streaming PIPS root canal dentin. Ebihara et al. This method involves the introduction of a Er:YAG laser on root canal dentin without water cooling special fibre tip through the root canal orifice, decreasing can cause minor cavities and ablation.

Altundasar et al. Arslan et al. On the other hand, Deleu et al. Therefore, it was only technique and ultrasonically activated irrigation. These limitations also play a role in the limited uptake of lasers for root canal shaping in Vertical root fracture diagnosis and treatment dental practice. Vertical root fractures have become increasingly common among endodontically treated teeth, and they are difficult Root canal disinfection and irrigation to diagnose accurately and treat effectively.

However, there are very few studies examining the use of lasers in The ability of lasers to disinfect root canals is well- diagnosing vertical root fracture cases. Although Kimura reported Gutknecht et al.

Gutknecht et al. Vertical fractures can be treated using a from infected bovine dentin disks, while Maden el al. The photoacoustic efficacy of an Er:YAG laser with radial and stripped tips on root canal dentin walls: used to accelerate soft tissue repair, and this has been an SEM evaluation. Laser Dent. Nogueira et al. Lasers Med. Non-invasive recording Conclusion of blood flow in human dental pulp.

Bactericidal extend the clinical time for both patients and doctors. Laser Med. Effect of have been reported in several studies. Thus, we Nd:YAG laser irradiation for removal of intracanal debris and smear conclude that these devices do not seem very practical layer in extracted human teeth. Pulpal response to exposure with Er:YAG laser. Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Basic study of the use of laser on detection of vertical root fracture.

The authors have not declared any conflict of interests. Determination of the effect of Nd:YAG laser irradiation through dentinal tubules on several oral pathogens. Mathew S, Thangaraj D Lasers in dentistry. Quintessence laser irradiation and two different irrigation regimes. Publishing Co, Inc. Moscow and Warsaw.