The Use Of Lasers For Direct Pulp Capping

Direct pulp capping helps extend the life of a diseased tooth by maintaining tooth vitality. Nowadays, lasers are more frequently used during direct pulp capping in the clinic, but their use has not been previously reviewed. This review presents the basic properties of currently available lasers, scientific evidence on the effects of laser application on direct pulp capping, and future directions for this technology. An extensive literature search was conducted in various databases for articles published up to January 2015. Original in vitro, in vivo, and clinical studies, reviews, and book chapters published in English were included. Various laser systems have been increasingly and successfully applied in direct pulp capping. Lasers offer excellent characteristics in terms of hemostasis and decontamination for field preparation during direct pulp capping treatment; however, the sealing of exposed pulp with one of the dental materials, such as calcium hydroxide, mineral trioxide aggregates, and bonded composite resins, is still required after laser treatment. Clinicians should consider the characteristics of each wavelength, the emission mode, irradiation exposure time, power, type of laser tip, and the distance between the laser tip and the surface being irradiated

Acceleration of ALA-induced PpIX fluorescence development in the oral mucosa.

The development of 5-aminolevulinic acid (ALA)-induced tissue fluorescence is optimal 2-4 hours after ALA application. Goal of this work was to develop a means of accelerating oral topical ALA-induced tissue fluorescence.In 300 hamsters, DMBA (9,10 dimethyl-1,2-benzanthracene) cheek pouch carcinogenesis produced dysplasia in 3-5 weeks. Topical application of 20% ALA in Eucerin was followed by localized ultrasound treatment (1, 3.3 MHz) in 150 animals. In 75 animals, ALA was applied in an Oral Pluronic Lecithin Organogel (OPLO-an absorption enhancer) vehicle. Seventy-five animals received only topical ALA in Eucerin. Hamsters were sacrificed and cryosections underwent fluorescence measurements, histological evaluation, 20-180 minutes after ALA application. One-way ANOVA detected independent effects of pathology on laser-induced fluorescence (LIF). Two-way ANOVA tested for independent effect of pathology and of OPLO, ultrasound, and interaction effects.Ultrasound significantly (P < 0.05) accelerated tissue fluorescence development.Low-frequency ultrasound can accelerate ALA-induced fluorescence development

Canal Aberrations Promoted by Three Nickel-Titanium Rotary Instruments in Simulated S-Shaped Canal

Abstract Objective: The aim of this study was to compare canal aberrations promoted by three nickel-titanium (NiTi) rotary systems in simulated S-shaped canal.Methods: Glide paths were prepared in thirty simulated S-shaped canal blocks. The blockswere then randomly assigned into three groups (n=10): ProTaper Universal (PTU), ProTaper NEXT(PTN) and iRace (IRA) and prepared per its manufacturer’s recommendation up to apical size #25. Pre-operative images were taken as baseline. Post-operative images were magnified to identify canal aberrations. Intra-operative images were investigated for aberrations occurred between each file used.Results: PTN produced the least number of canal aberrations, followed by IRA and PTU respectively. The incidences of aberration between PTN and PTU were significantly different (p<0.05).Conclusion: The ProTaper NEXT system should be the choice for S-shaped canal preparationbecause of the least canal aberrations. Keywords: NiTi rotary files, S-shaped canal, Canal aberration

Acceleration of ALA-induced PpIX fluorescence development in the oral mucosa.

The development of 5-aminolevulinic acid (ALA)-induced tissue fluorescence is optimal 2-4 hours after ALA application. Goal of this work was to develop a means of accelerating oral topical ALA-induced tissue fluorescence.In 300 hamsters, DMBA (9,10 dimethyl-1,2-benzanthracene) cheek pouch carcinogenesis produced dysplasia in 3-5 weeks. Topical application of 20% ALA in Eucerin was followed by localized ultrasound treatment (1, 3.3 MHz) in 150 animals. In 75 animals, ALA was applied in an Oral Pluronic Lecithin Organogel (OPLO-an absorption enhancer) vehicle. Seventy-five animals received only topical ALA in Eucerin. Hamsters were sacrificed and cryosections underwent fluorescence measurements, histological evaluation, 20-180 minutes after ALA application. One-way ANOVA detected independent effects of pathology on laser-induced fluorescence (LIF). Two-way ANOVA tested for independent effect of pathology and of OPLO, ultrasound, and interaction effects.Ultrasound significantly (P < 0.05) accelerated tissue fluorescence development.Low-frequency ultrasound can accelerate ALA-induced fluorescence development