Intraosseous temperature changes during the use of piezosurgical inserts in vitro

2012 ◽  
Vol 41 (11) ◽  
pp. 1338-1343 ◽  
Author(s):  
S. Schütz ◽  
J. Egger ◽  
S. Kühl ◽  
A. Filippi ◽  
J.Th. Lambrecht
Keyword(s):  
Temperature Changes

Comparison of Temperature Changes in the Pulp Chamber Induced by Various Light Curing Units, In Vitro

10.2341/05-26 ◽  
2006 ◽  
Vol 31 (2) ◽  
pp. 261-265 ◽  
Author(s):  
A. R. Yazici ◽  
A. Müftü ◽  
G. Kugel ◽  
R. D. Perry
Keyword(s):  
Clinical Relevance ◽  
Critical Factor ◽  
Pulp Chamber ◽  
Temperature Changes ◽  
Thermal Transfer ◽  
Light Curing

Clinical Relevance The thickness of the residual dentin is a critical factor in the reducing thermal transfer to pulp, and this transfer varies with the curing unit used.

Intracellular pH-temperature interactions of hepatocytes from American eels

1983 ◽  
Vol 245 (1) ◽  
pp. R32-R37
Author(s):  
P. J. Walsh ◽  
T. W. Moon
Keyword(s):  
Intracellular Ph ◽  
Acclimation Temperature ◽  
C Cells ◽  
Medium Ph ◽  
American Eel ◽  
Temperature Changes ◽  
American Eels ◽  
Temperature Interactions

The effects of acclimation temperature and acute temperature changes on the intracellular pH (pHi) of hepatocytes isolated from the American eel, Anguilla rostrata, were studied by the measurement of the distribution ratio of dimethyloxizolidinedione (DMO). Varying the concentration of DMO (10(-7) to 10(-4) M) did not affect estimates of pHi, indicating that DMO acts as an ideal pHi probe in eel hepatocytes. In vitro studies yielded values of liver cell pHi identical to those previously measured in vivo (in vitro pHi = 7.556 +/- 0.010; in vivo pHi = 7.570 +/- 0.049 at 20 degrees C); hepatocyte pHi varied inversely with acclimation temperature (5-20 degrees C) in a manner consistent with alphastat regulation (delta pH/delta T = -0.0182 +/- 0.021). During acute temperature increases (5-20 degrees C) and decreases (20-5 degrees C) hepatocytes regulated pHi to the appropriate (acclimated) value within 30-45 min posttransfer under conditions of constant medium pH (pHe). The effects of medium pH were also studied, and although patterns of pHi regulation differed between 5 and 20 degrees C cells, a pHi difference consistent with alphastat regulation was maintained between 5 and 20 degrees C cells over the pHe range 7.8-8.3.

Imaging temperature changes in an interventional 0.5 T magnet: In-vitro results

1997 ◽  
Vol 21 (5) ◽  
pp. 464-473 ◽  
Author(s):  
Paul Steiner ◽  
Andreas W. Schoenenberger ◽  
Peter Erhart ◽  
Erik Penner ◽  
Gustav K. von Schulthess ◽  
...  
Keyword(s):  
Temperature Changes

scholarly journals THE MECHANISM OF AERIAL DISINFECTION BY GLYCOLS AND OTHER CHEMICAL AGENTS

1947 ◽  
Vol 85 (6) ◽  
pp. 741-757 ◽  
Author(s):  
Theodore T. Puck
Keyword(s):  
Relative Humidity ◽  
Vapor Pressure ◽  
Vapor Concentration ◽  
Direct Function ◽  
Temperature Changes ◽  
Chemical Agents ◽  
Killing Action ◽  
High Degree ◽  
Bactericidal Efficiency

The effectiveness of any compound as an aerial germicide depends upon the extent of condensation of its vapor on air-suspended bacteria, and on the rate at which the resulting concentration of germicide can produce death of the microorganisms. The properties of any compound conducive to production of the highest rate of kill of air-borne microorganisms by means of the smallest possible concentration of germicide vapor, are as folows: (a) a low vapor pressure, but not lower than 0.001 mm. Hg at 25°C.; (b) high hygroscopicity; (c) toxicity for bacterial metabolism—a high degree of potency is not necessary although the killing action will be more efficient the higher the antibacterial activity of the compound employed. For any compound the killing action is always a direct function of the concentration of its vapor in the air. The maximum amount of a hygroscopic substance which can exist in the vapor state decreases as the relative humidity increases. Hence, at high relative humidities the bactericidal efficiency is lowest. At lower relative humidities the air can contain more vapor, and hence a greater effect is possible. At any relative humidity, the killing action is greater, the more closely the germicide vapor concentration approaches the saturation point. The presence of soluble compounds in droplets containing bacteria promotes more extensive condensation of the germicide than would otherwise occur, and so enhances its effectiveness. In the absence of such soluble substances, low atmospheric humidities may cause complete desiccation of a bacterial particle. Under these conditions its surface may become resistant to the condensation of the vapor, and thus prevent effective germicidal action. The influence of temperature changes on the killing efficiency maybe correctly deduced from a consideration of the effect of a rise in temperature on the vapor pressure of the germicide and on the rate of its bactericidal action in vitro. Equations are presented for estimating quantitatively the magnitude of some of the effects discussed.

In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiberoptic tip withdrawl techniques

2003 ◽  
Author(s):  
Jesus Djalma Pecora ◽  
Aldo Brugnera, Jr. ◽  
Melissa A. Marchesan ◽  
Danilo M. Zanello Guerisoli ◽  
Eduardo L. Barbin ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Laser Application ◽  
Root Temperature ◽  
In Vitro Evaluation ◽  
Temperature Changes

Cl- regulates cryoglobulin structure: a new hypothesis for the physiopathological mechanism of temperature non-dependent cryoprecipitation

2004 ◽  
Vol 42 (6) ◽  
Author(s):  
Enrico Di Stasio ◽  
Patrizia Bizzarri ◽  
Milvia Casato ◽  
Antonio Galtieri ◽  
Massimo Fiorilli ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Clinical Signs ◽  
Cold Temperature ◽  
Pathogenetic Mechanism ◽  
Temperature Dependent ◽  
Temperature Changes ◽  
Significant Temperature ◽  
Neoplastic Disorders ◽  
New Hypothesis

AbstractCryoglobulins are pathological cold-precipitable immunoglobulins associated with a number of infectious, autoimmune and neoplastic disorders. Patients, when exposed to low temperatures, show symptoms related to intravascular precipitation of such immunoglobulins. The formation of cryoaggregates induced by exposure to cold temperature is the key pathogenetic mechanism. The subsequent intravascular precipitation can account for some clinical signs of peripheral vasculitis, but fails to explain the precipitation of cryoglobulins in regions where no significant temperature changes take place. We studied, in vitro, the activity of different ions on temperature-dependent aggregation of cryoglobulins and found that the concentration of Cl

Temperature Changes in Cortical Bone after Implant Site Preparation Using a Single Bur versus Multiple Drilling Steps: An In Vitro Investigation

2013 ◽  
Vol 17 (4) ◽  
pp. 700-707 ◽  
Author(s):  
Sergio Alexandre Gehrke ◽  
Raphaél Bettach ◽  
Silvio Taschieri ◽  
Gilles Boukhris ◽  
Stefano Corbella ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Site Preparation ◽  
Temperature Changes ◽  
In Vitro Investigation ◽  
Implant Site Preparation

scholarly journals COMPARATIVE STUDY OF THE THERMAL EFFECT OF TWO KINDS OF OPTIC FIBRES OF HIGH INTENSIVE 810 NM DIODE LASER (IN VITRO STUDY)

2021 ◽  
Vol 27 (1) ◽  
pp. 3523-3528
Author(s):  
Raya Grozdanova-Uzunova ◽  
◽  
Elka Radeva ◽  
Dimitar Kosturkov ◽  
Evgeniya Popova ◽  
...  
Keyword(s):  
Diode Laser ◽  
Optical Fibers ◽  
Light Guide ◽  
In Vitro Study ◽  
Root Surface ◽  
Quartz Fiber ◽  
Temperature Changes ◽  
Root Canals ◽  
Organically Modified

Purpose: The aim of our in vitro study is to investigate the thermal changes on the outer root surface that occur after irradiation with a high intensive diode laser with two types of optical fibers. Material and Methods: The root canals of 24 extracted single-rooted and multi-rooted teeth (59 root canals) were prepared with Pro Taper Gold to F3 and treated with 810 nm diode laser for 8 s with circular movements from apex to orifices. Teeth are divided into two groups. A quartz light guide is used in the first group, and in the second group, the root canals are treated with an organically modified quartz light guide. The temperature changes were detected with FLIR - Т 330 Infrared Thermal Camera and the data was processed with FLIR Reporter 9 Professional software. Results: In 90% of cases, the temperature rise on the outer root surface is up to 8°C. In the first group with quartz fiber, the minimum increase in temperature is 2°C, the maximum is 11°C (in the cases with four root canals). When using the organically modified quartz fiber, the registered minimum increase in temperature is 1.2°C and maximum increase of 9.2°C (in cases with curved canals). Conclusion: Temperature changes on the outer root surface using an 810 nm diode laser are biocompatible. There is no statistically significant difference between the temperatures measured in the two types of optical fibers used - quartz and organically modified quartz light.

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