Effect of 532 nm and 671 nm Diode Lasers Irradiation on Calcium Solubility in Human Dental Enamel: An Ex-Vivo Study

2015 ◽  
Vol 5 (4) ◽  
pp. 320-325
Author(s):  
Nafie Almuslet ◽  
Elhadi Awooda
Keyword(s):  
Ex Vivo ◽  
Diode Lasers ◽  
Dental Enamel ◽  
Calcium Solubility ◽  
Ex Vivo Study ◽  
532 Nm

Thermodynamic Effects of 3 Different Diode Lasers on an Implant-Bone Interface: An Ex-Vivo Study With Review of the Literature

2017 ◽  
Vol 43 (2) ◽  
pp. 94-99 ◽  
Author(s):  
Nicola Alberto Valente ◽  
Antonio Calascibetta ◽  
Giuseppe Patianna ◽  
Thomas Mang ◽  
Michael Hatton ◽  
...  
Keyword(s):  
Diode Laser ◽  
Human Body ◽  
Room Temperature ◽  
Ex Vivo ◽  
Diode Lasers ◽  
Water Bath ◽  
Bone Block ◽  
Machined Surface ◽  
Implant Surface ◽  
Ex Vivo Study

The aim of this study is to assess the increase of temperature following laser irradiation with 810 nm, 980 nm, and 1064 nm diode laser wavelengths, of an implant under conditions that more closely replicate those of the human body. A 4 × 14 mm machined surface implant was placed in a porcine rib to replicate the conductivity of heat given by the bone. A peri-implant vertical defect was made that was 2 mm wide and 2 mm deep to simulate bone resorption. Two thermocouples were positioned crestally and apically on the implant surface. The tip of the laser was kept 3 mm away from the surface and continuously moved in an up-and-down and side-to-side fashion, inside the defect for 60 seconds. Initial temperatures and the time needed to reach an increase of 10°C were recorded. The experiment was repeated at room temperature and in a 37°C water bath with the following settings: 0.6 W, 0.8 W, 1 W continuous and repeated in pulsed. A critical increase of temperature of more than 10°C is reached with all lasers at 0.8 W and 1 W in continuous mode at room temperature. Only the 1064 nm diode laser reached the critical increase at 0.8 W in pulsed mode. No critical increase of temperature was registered with other settings and when the bone block was placed in a 37°C water bath. The results of this study suggest that use of these diode lasers does not cause a harmful increase in temperature when used under conditions similar to those of the human body.

Effects of Two Diode Lasers With and Without Photosensitization on Contaminated Implant Surfaces: An Ex Vivo Study

2017 ◽  
Vol 35 (7) ◽  
pp. 347-356 ◽  
Author(s):  
Nicola Alberto Valente ◽  
Thomas Mang ◽  
Michael Hatton ◽  
Lynn Mikulski ◽  
Sebastiano Andreana
Keyword(s):  
Ex Vivo ◽  
Diode Lasers ◽  
Ex Vivo Study

scholarly journals Effect of Toothpastes with Different Abrasives on Eroded Human Enamel: An in situ/ex vivo Study

2013 ◽  
Vol 7 (1) ◽  
pp. 132-139 ◽  
Author(s):  
Meire Coelho Ferreira ◽  
Maria Letícia Ramos-Jorge ◽  
Alberto Carlos Botazzo Delbem ◽  
Ricardo de Sousa Vieirac
Keyword(s):  
Ex Vivo ◽  
Soft Drink ◽  
Dental Enamel ◽  
Additional Treatment ◽  
Control Group ◽  
Wear Depth ◽  
Human Enamel ◽  
Waiting Periods ◽  
Ex Vivo Study

The aim of the present study was to investigate the abrasive effect of CaCO3 and SiO2-based fluoride-free experimental toothpastes on eroded human permanent dental enamel and evaluate the effectiveness of waiting periods between acid exposure and tooth brushing. Twelve volunteers wore palatal appliances containing human enamel blocks for two periods of five days each. The appliances were immersed in a soft drink for five minutes four times a day (9:00 am, 11:00 am, 2:00 pm and 4:00 pm). On two occasions, two blocks were not submitted to additional treatment; two blocks were brushed (30 s) either with a CaCO3 or SiO2 toothpaste immediately after erosion and two blocks were brushed 1 h after erosion. Thus, the sample was divided into six groups: erosion alone (CaCO3 and SiO2 control); brushing with fluoride-free toothpaste (CaCO3 immediate and 1 h after erosion; SiO2 immediate and 1 h after erosion). Significant differences in wear depth were found between the enamel blocks in the CaCO3 immediate and 1 h after erosion groups and the blocks in the CaCO3 control group (p=0.001; p=0.022). No significant differences were found regarding the change in roughness and wear depth between blocks submitted to immediate abrasion and 1 h after erosion (CaCO3 and SiO2). The data revealed that surface roughness and wear depth is increased when erosion is combined with dental abrasion, regardless of the abrasive used. Waiting for 1 h to brush the eroded blocks offered no protective effect.

Temperature Change from Diode Lasers in Oral Mucosa: An Ex Vivo Study

2021 ◽  
Author(s):  
Georgios E. Romanos ◽  
Upasna Malhotra ◽  
Rocco W. Tedesco ◽  
Wei Hou ◽  
Rafael Delgado-Ruiz
Keyword(s):  
Temperature Change ◽  
Oral Mucosa ◽  
Ex Vivo ◽  
Diode Lasers ◽  
Ex Vivo Study

Direct Visualization of A2, A3, and A4 Finger Flexor Pulley Injuries at 3-T and 7-T MRI: An Ex Vivo Study

2020 ◽  
Author(s):  
Rafael Heiss ◽  
Frank W. Roemer ◽  
Christoph Lutter ◽  
Rolf Janka ◽  
Volker Schöffl ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Direct Visualization ◽  
Ex Vivo Study

Impact of metal artefacts in QCT of the hip caused by a contralateral Gamma type nail: an ex vivo study

2014 ◽  
Author(s):  
Klaus Engelke ◽  
Nicolas Bouler ◽  
Oleg Museyko Fuerst ◽  
Sebastien Parratte ◽  
Thomas Fuerst ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Metal Artefacts ◽  
Ex Vivo Study
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