Transmission of Nd: YAG Laser through Human Dentin

Zennyu, Kunio; Inoue, Masataka; Konishi, Masato; Minami, Masaaki; Kumazaki, Mamoru; Fujii, B; Lee, Chung Suek

doi:10.5984/jjpnsoclaserdent.7.37

Cited by 8 publications

(7 citation statements)

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“…Previous studies have reported thermal effects of laser irradiation on dental pulp: Nd:YAG and CO 2 lasers may penetrate deeply into dentin and induce temperature elevations (29,30). However, healthy pulp tissue may not be injured thermally, when the laser is set at the correct parameters (7).…”

Section: Discussionmentioning

confidence: 99%

Odontoblast responses to GaAlAs laser irradiation in rat molars: an experimental study using heat‐shock protein‐25 immunohistochemistry

Tate

Yoshiba

et al. 2006

European J Oral Sciences

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Pulpal responses to gallium-aluminum-arsenide (GaAlAs) laser irradiation applied to the tooth remains to be elucidated. This study aimed to evaluate the effect of the GaAlAs laser on odontoblasts using immunohistochemistry for heat-shock protein (HSP)-25, which labels mature and newly differentiated odontoblasts. The mesial surface of the upper right first molar of 8-wk-old Wistar rats was lased at an output power of 0.5-1.5 W for 180 s. The animals were perfusion-fixed at intervals of 6 h to 30 d after irradiation. At 6 h to 7 d, the intensity of HSP-25-immunoreactivity was found to be disturbed in the coronal odontoblast-layer in an energy-dependent manner. At 30 d, tertiary dentin with/without bone-like tissue was formed abundantly in the dental pulp. Statistical analysis revealed that the area occupied by the new hard tissues was significantly wider in 1.5 W-lased specimens than in 0.5 W-lased specimens. An intense HSP-25 immunoreactivity was seen in the odontoblasts underlying the tertiary dentin, whereas immunoreactivity was weak around the bone-like tissue. It was concluded that the GaAlAs laser may induce the formation of tertiary dentin by influencing the secretory activity of odontoblasts. However, higher energies may cause irreversible changes to the pulp, often leading to the formation of an intrapulpal bone-like tissue.

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Section: Discussionmentioning

confidence: 99%

Odontoblast responses to GaAlAs laser irradiation in rat molars: an experimental study using heat‐shock protein‐25 immunohistochemistry

Tate

Yoshiba

et al. 2006

European J Oral Sciences

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“…Nd:Y-AG and CO 2 lasers effectively cause occlusion of dentinal tubules. Laser energy at 1064 nm is transmitted through dentine (Zennyu et al 1996), producing thermally mediated effects on microcirculation (Funato et al 1991), and pulpal analgesia via its nerve system (Whitters et al 1995). A variety of theories have been put forward as to how the laser produces its analgesic effect.…”

Section: Middle Output Power Lasersmentioning

confidence: 99%

“…Compared to other lasers, the Nd:YAG laser beam penetrates deeply through dentine (Zennyu et al 1996), bone, and non-pigmented soft tissues (Dederich 1993). Irradiation causing temperature rises exceeding the threshold of pulpal tolerance will cause thermal injury to the pulp.…”

Section: Effect Of Laser Irradiation To Dental Pulpmentioning

confidence: 99%

Treatment of dentine hypersensitivity by lasers: a review

Kimura

Wilder‐Smith

Yonaga

et al. 2000

J Clinic Periodontology

289

224

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Background, aims: Since the development of the ruby laser by Maiman in 1960, a variety of papers on potential applications for lasers in dentistry have been published. The purpose of this paper is to summarise laser applications for the treatment of dentine hypersensitivity. The effects of laser on pulp tissue and problems on laser treatment are also reviewed. This article reviews the role of lasers for the treatment of dentine hypersensitivity since 1985, summarises many research reports from the last decade, and surmises what the future may hold for lasers in this treatment. Method: To date, 4 kinds of lasers have been used for the treatment of dentine hypersensitivity, and the effectiveness ranged from 5.2 to 100%, which was dependent on the laser type and parameters used. The mechanism involved in laser treatment of dentine hypersensitivity are relatively unknown. Results: These require clarification to result in safely effective treatment optimization. In general, the efficiency for the treatment of dentine hypersensitivity using lasers is higher than other methods, but in severe cases, it is less effective. Conclusion: It is necessary to consider the severity of dentine hypersensitivity before laser use.

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“…1988 ). Laser energy at 1064 nm (Nd:YAG laser) is transmitted through dentine ( Zennyu et al . 1996 ), indicating thermally mediated effects ( Funato et al .…”

Section: Introductionmentioning

confidence: 99%

Lasers in endodontics: a review

2000

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Since the development of the ruby laser by Maiman in 1960 and the application of the laser for endodontics by Weichman in 1971, a variety of papers on potential applications for lasers in endodontics have been published. The purpose of this paper is to summarize laser applications in endodontics, including their use in pulp diagnosis, dentinal hypersensitivity, pulp capping and pulpotomy, sterilization of root canals, root canal shaping and obturation and apicectomy. The effects of laser on root canal walls and periodontal tissues are also reviewed. The essential question is whether a laser can provide equal or improved treatment over conventional care. Secondary issues include treatment duration and cost/benefit ratio. This article reviews the role of lasers in endodontics since the early 1970s, summarizes many research reports from the last decade, and surmises what the future may hold for lasers in endodontics. With the potential availability of many new laser wavelengths and modes, much interest is developing in this promising field.

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Transmission of Nd: YAG Laser through Human Dentin

Cited by 8 publications

References 0 publications

Odontoblast responses to GaAlAs laser irradiation in rat molars: an experimental study using heat‐shock protein‐25 immunohistochemistry

Odontoblast responses to GaAlAs laser irradiation in rat molars: an experimental study using heat‐shock protein‐25 immunohistochemistry

Treatment of dentine hypersensitivity by lasers: a review

Lasers in endodontics: a review

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