Basic study on vibrations during tooth preparations caused by high-speed drilling and Er:YAG laser irradiation

2003 ◽  
Vol 32 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Kazunori Takamori ◽  
Hirohiko Furukawa ◽  
Yoshikatsu Morikawa ◽  
Tadashi Katayama ◽  
Shigeru Watanabe
Keyword(s):  
Laser Irradiation ◽  
High Speed ◽  
Er:Yag Laser ◽  
Basic Study ◽  
High Speed Drilling

scholarly journals Investigation of Er:YAG laser-activated irrigation for the removal of biofilm and observations of laser-induced cavitation behavior

2022 ◽  
Author(s):  
Taiji Nagahashi ◽  
Yoshio Yahata ◽  
Keisuke Handa ◽  
Masato Nakano ◽  
Shigeto Suzuki ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Root Canal ◽  
High Speed ◽  
Er:Yag Laser ◽  
Positive Control ◽  
High Speed Camera ◽  
Pulp Chamber ◽  
Root Canal Irrigation ◽  
Biofilm Removal ◽  
The Impact

Abstract Background We investigated the biofilm removal effects of LAI using a pig model, focusing on the impact of the fiber tip position, and used a high-speed camera to observe the occurrence and positioning of the cavitation associated with laser irradiation. Methods A total of 16 roots of deciduous mandibular second premolars from 4 pigs were used. After a pulpectomy, the canals were left open for two weeks and sealed for 4 weeks to induce intraradicular biofilm. Then, root canal irrigation was performed with Er:YAG laser activation. The fiber tip was inserted at two different positions, i.e., into the root canal in the intracanal LAI group and into the pulp chamber in the coronal LAI group. Intracanal needle irrigation with saline or 5% NaOCl was utilized in the positive control and CNI groups. SEM and qPCR were carried out to evaluate treatment efficacy. For qPCR, ANOVA and a Tukey-Kramer post hoc test were performed with α = 0.05. A high-speed camera was used to observe the generation of cavitation bubbles and the movement of the induced bubbles after laser irradiation. Results The intracanal and coronal LAI groups showed significantly lower amounts of bacteria than either the positive control or CNI groups. There was no significant difference found between the intracanal and coronal LAI groups. SEM images revealed opened dentinal tubules with the destruction of biofilm in both LAI groups. High-speed camera images demonstrated cavitation bubble production inside the root canal after a single pulse irradiation pulse. The generated bubbles moved throughout the entire internal multi-rooted tooth space. Conclusions Coronal LAI can generate cavitation in the root canal with a simply placed fiber inside the pulp chamber, leading to effective biofilm removal. This method could thus contribute to the future development of endodontic treatments for refractory apical periodontitis caused by intraradicular biofilm.

Chemical analysis and surface morphology of enamel and dentin following 9.6μ CO2 laser irradiation versus high speed drilling

2005 ◽  
Vol 33 (5) ◽  
pp. 427-432 ◽  
Author(s):  
Joshua Moshonov ◽  
Adam Stabholz ◽  
Rita Bar-Hilel ◽  
Benjamin Peretz
Keyword(s):  
Chemical Analysis ◽  
Surface Morphology ◽  
Laser Irradiation ◽  
Co2 Laser ◽  
High Speed ◽  
High Speed Drilling

scholarly journals Influence of CVD Diamond Tips and Er:YAG Laser Irradiation on Bonding of Different Adhesive Systems to Dentin

2013 ◽  
Vol 14 (1) ◽  
pp. 14-20 ◽  
Author(s):  
Daphne Câmara Barcellos ◽  
Alessandra Buhler Borges ◽  
Cesar Rogério Pucci ◽  
Carlos Rocha Gomes Torres ◽  
Melissa Aline da Silva ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Laser Irradiation ◽  
High Speed ◽  
Er:Yag Laser ◽  
Testing Machine ◽  
Cvd Diamond ◽  
Single Bond ◽  
Adhesive Systems ◽  
Yag Laser

ABSTRACT Aim The aim of this study was to compare the microtensile bond strength of three adhesive systems, using different methods of dentin preparation. Materials and methods A hundred and eight bovine teeth were used. The dentin from buccal face was exposed and prepared with three different methods, divided in 3 groups: Group 1 (DT)- diamond tip on a high-speed handpiece; Group 2 (CVD)-CVD tip on a ultrasonic handpiece; Group 3 (LA)-Er: YAG laser. The teeth were divided into 3 subgroups, according adhesive systems used: Subgroup 1-Adper Single Bond Plus/3M ESPE (SB) total-etch adhesive; Subgroup 2-Adper Scotchbond SE/3M ESPE (AS) selfetching adhesive; Subgroup 3-Clearfil SE Bond/Kuraray (CS) selfetching adhesive. Blocks of composite (Filtek Z250–3M ESPE) 4 mm high were built up and specimens were stored in deionized water for 24 hours at 37°C. Serial mesiodistal and buccolingual cuts were made and stick-like specimens were obtained, with transversal section of 1.0 mm2. The samples were submitted to microtensile test at 1 mm/min and load of 10 kg in a universal testing machine. Data (MPa) were subjected to ANOVA and Tukey's tests (p < 0.05). Results and conclusion Surface treatment with Diamond or CVD tips associated with Clearfil SE Bond adhesive produced significantly lower bond strength values compared to other groups. Surface treatment with Er: YAG laser associated with Single Bond Plus or Clearfil SE Bond adhesives and surface treatment with CVD tip associated with Adper Scotchbond SE adhesive produced significantly lower bond strength values compared to surface treatment with diamond or CVD tips associated with Single Bond Plus or Adper Scotchbond SE adhesives. Clinical significance Interactions between laser and the CVD tip technologies and the different adhesive systems can produce a satisfactory bonding strength result, so that these associations may be beneficial and enhance the clinical outcomes. How to cite this article Silva MA, Di Nicolo R, Barcellos DC, Batista GR, Pucci CR, Torres CRG, Borges AB. Influence of CVD Diamond Tips and Er:YAG Laser Irradiation on Bonding of Different Adhesive Systems to Dentin. J Contemp Dent Pract 2013;14(1):14-20.

scholarly journals Investigation of Er:YAG laser-activated irrigation for the removal of biofilm and observations of laser-induced cavitation behavior

2021 ◽  
Author(s):  
Taiji Nagahashi ◽  
Yoshio Yahata ◽  
Keisuke Handa ◽  
Masato Nakano ◽  
Shigeto Suzuki ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Root Canal ◽  
High Speed ◽  
Er:Yag Laser ◽  
Positive Control ◽  
High Speed Camera ◽  
Pulp Chamber ◽  
Root Canal Irrigation ◽  
Biofilm Removal ◽  
The Impact

Abstract BackgroundWe investigated the biofilm removal effects of LAI using a pig model, focusing on the impact of the fiber tip position, and used a high-speed camera to observe the occurrence and positioning of the cavitation associated with laser irradiation.MethodsA total of 16 roots of deciduous mandibular second premolars from 4 pigs were used. After a pulpectomy, the canals were left open for two weeks and sealed for 4 weeks to induce intraradicular biofilm. Then, root canal irrigation was performed with Er:YAG laser activation. The fiber tip was inserted at two different positions, i.e., into the root canal in the intracanal LAI group and into the pulp chamber in the coronal LAI group. Intracanal needle irrigation with saline or 5% NaOCl was utilized in the positive control and CNI groups. SEM and qPCR were carried out to evaluate treatment efficacy. For qPCR, ANOVA and a Tukey-Kramer post hoc test were performed with α=0.05. A high-speed camera was used to observe the generation of cavitation bubbles and the movement of the induced bubbles after laser irradiation.ResultsThe intracanal and coronal LAI groups showed significantly lower amounts of bacteria than either the positive control or CNI groups. There was no significant difference found between the intracanal and coronal LAI groups. SEM images revealed opened dentinal tubules with the destruction of biofilm in both LAI groups. High-speed camera images demonstrated cavitation bubble production inside the root canal after a single pulse irradiation pulse. The generated bubbles moved throughout the entire internal multi-rooted tooth space.ConclusionsCoronal LAI can generate cavitation in the root canal with a simply placed fiber inside the pulp chamber, leading to effective biofilm removal. This method could thus contribute to the future development of endodontic treatments for refractory apical periodontitis caused by intraradicular biofilm.

The influence of Er:YAG laser irradiation on re-bonding shear bond strength of enamel

2021 ◽  
pp. 1-19
Author(s):  
Huimin Fang ◽  
Caitian Teng ◽  
Pengfei Lu ◽  
Yang Cao ◽  
Qing Yu
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Shear Bond Strength ◽  
Er:Yag Laser

Droplet and bone dust contamination from high‐speed drilling during mastoidectomy

2021 ◽  
Vol 46 (3) ◽  
pp. 614-618
Author(s):  
Anne L. Markey ◽  
Samuel C. Leong ◽  
Casey Vaughan
Keyword(s):  
High Speed ◽  
High Speed Drilling

Dynamic characteristics of a drill in the drilling process

2003 ◽  
Vol 217 (2) ◽  
pp. 161-167 ◽  
Author(s):  
B W Huang
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Thrust Force ◽  
Time Dependent ◽  
Drilling Process ◽  
Improve Quality ◽  
Vibration Model ◽  
High Speed Drilling ◽  
Spinning Speed ◽  
Twisted Beam

The dynamic characteristics of high-speed drilling were investigated in this study. To improve quality and produce a higher production rate, the dynamic characteristics of the drilling process need to be studied. A pre-twisted beam is used to simulate the drill. The moving Winkler-type elastic foundation is used to approximate the drilling process. A time-dependent vibration model for drilling is presented. The spinning speed, pre-twisted angle and thrust force effects of the drill are considered. The numerical analysis indicates that the natural frequency is suddenly reduced as the drill moves into a workpiece.

Basic study on vibrations of tooth preparations caused by air turbine, quintuple speed handpiece, and Er:YAG Laser

2003 ◽  
Vol 1248 ◽  
pp. 227-230 ◽  
Author(s):  
Kazunori Takamori ◽  
Hirohiko Furukawa ◽  
Tadashi Katayama ◽  
Shigeru Watanabe
Keyword(s):  
Er:Yag Laser ◽  
Basic Study ◽  
Air Turbine
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