Heat Generation and Temperature Control during Bone Drilling for Orthodontic Mini-Implants: An In Vitro Study

Background: The purpose of our in vitro study was to evaluate the impact of different irrigation fluid temperatures in combination with different drilling speeds on intraosseous temperature changes during mini-implant site preparation. Methods: Porcine ribs were used as bone specimens. Grouping determinants were as follows: irrigation fluid temperature (10 and 20 °C) and drilling speed (200, 600, 900, and 1200 RPM). The axial load was controlled at 2.0 kg. Temperature measurements were conducted using K-type thermocouples. Results: Extreme increments were observed only in the unirrigated groups. Irrigation invariably made a significant difference within groups defined by the same drilling speed. The comparison of the different temperature irrigation fluids (10 and 20 °C) in combination with the same drilling speed (200, 600, 900, or 1200 rpm) resulted in a statistically significant difference between the two different temperatures, whereas the use of irrigation fluid at a controlled room temperature of 20 °C showed significantly higher temperature changes. Conclusions: Based on the results of the study, we conclude that irrigation while preparing a pilot hole for a self-tapping orthodontic miniscrew is of utmost importance, even at low drilling speeds. The temperature of the cooling fluid does influence local temperature elevation to a significant extent.

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The impact of impression coping geometrical design on accuracy of implant impressions: an experimental study

International Journal of Implant Dentistry ◽

10.1186/s40729-020-00256-0 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

Motaz Osman ◽

Neamat Hassan Abubakr ◽

Ahmed Suliman ◽

Hassan Ziada

Keyword(s):

Experimental Study ◽

In Vitro Study ◽

Acrylic Resin ◽

Vitro Study ◽

Geometrical Design ◽

Custom Made ◽

Significant Difference ◽

The Impact

Abstract Aim This in vitro study aimed to evaluate the effect of implant impression coping geometrical designs on the accuracy of open and closed impression techniques and in the parallel and nonparallel implant positions. Material and methods Three custom-made acrylic resin models of three tested implant systems (Straumann®, SIC Invent®, and Osstem®) with diverse coping geometrical designs were evaluated in simulated cases of two parallel and two nonparallel implants. The horizontal and vertical discrepancies were measured and analyzed. Results No statistically significant differences between the two impression techniques in either parallel or nonparallel implants were observed. The high retentive design of the Osstem system showed a statistically significant difference. Conclusion The geometrical design of the impression copings did not affect the accuracy for either the open and closed tray techniques. However, the high retentive coping design of the Osstem implant affected the accuracy in the open tray technique.

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Influence of bone density, drill diameter, drilling speed, and irrigation on temperature changes during implant osteotomies: an in vitro study

Clinical Oral Investigations ◽

10.1007/s00784-020-03398-y ◽

2020 ◽

Cited By ~ 1

Author(s):

Oscar Salomó-Coll ◽

Beatriz Auriol-Muerza ◽

Naroa Lozano-Carrascal ◽

Federico Hernández-Alfaro ◽

Hom-Lay Wang ◽

...

Keyword(s):

Bone Density ◽

In Vitro Study ◽

Vitro Study ◽

Drilling Speed ◽

Temperature Changes ◽

Drill Diameter

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Marginal and Internal Fit of Ceramic Prostheses Fabricated from Different Chairside CAD/CAM Systems: An In Vitro Study

Applied Sciences ◽

10.3390/app11020857 ◽

2021 ◽

Vol 11 (2) ◽

pp. 857

Author(s):

Keunbada Son ◽

Kyu-Bok Lee

Keyword(s):

Computer Aided Design ◽

In Vitro Study ◽

Vitro Study ◽

Marginal Gap ◽

Significant Difference ◽

Cad Cam ◽

Ceramic Crowns ◽

Internal Fit ◽

Cam Systems

The purpose of this in vitro study was to evaluate marginal and internal fits of ceramic crowns fabricated with chairside computer-aided design and manufacturing (CAD/CAM) systems. An experimental model based on ISO 12836:2015 was digitally scanned with different intraoral scanners (Omnicam (CEREC), EZIS PO (DDS), and CS3500 (Carestream)). Ceramic crowns were fabricated using the CAD/CAM process recommended by each system (CEREC, EZIS, and Carestream systems; N = 15). The 3-dimensional (3D) marginal and internal fit of each ceramic crown was measured using a 3D inspection software (Geomagic control X). Differences among the systems and various measurements were evaluated using the Kruskal–Wallis test. Statistically significant differences were validated using pairwise comparisons (α = 0.05). Occlusal gaps in the CEREC, EZIS, and Carestream groups were 113.0, 161.3, and 438.2 µm, respectively (p < 0.001). The axial gaps were 83.4, 78.0, and 107.9 µm, respectively. The marginal gaps were 77.8, 99.3, and 60.6 µm, respectively, and the whole gaps were 85.9, 107.3, and 214.0 µm, respectively. Significant differences were observed with the EZIS system compared with the other two systems in terms of the marginal gap sizes. The CEREC system showed no significant differences among the four measured regions. However, the EZIS and Carestream systems did show a statistically significant difference (p < 0.05). All three systems were judged to be capable of fabricating clinically acceptable prostheses, because the marginal gap, which is the most important factor in the marginal fit of prostheses, was recorded to be below 100 µm in all three systems.

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In vitro study on the impact of different cusp inclinations on cracked teeth

Biomedical Research ◽

10.4066/biomedicalresearch.29-17-829 ◽

2018 ◽

Author(s):

Nina Xie

Keyword(s):

In Vitro Study ◽

Vitro Study ◽

The Impact

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The impact of stent design on the structural mechanics of the crossing Y-stent: an in vitro study

Neuroradiology ◽

10.1007/s00234-014-1378-3 ◽

2014 ◽

Vol 56 (8) ◽

pp. 655-659 ◽

Cited By ~ 3

Author(s):

Chang-Young Lee ◽

Seong-Ho Park ◽

Chang-Hyun Kim ◽

Goetz Benndorf

Keyword(s):

In Vitro Study ◽

Structural Mechanics ◽

Vitro Study ◽

Stent Design ◽

The Impact

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Effect of pulpal temperature changes on finishing and polishing of composites- An in-vitro study

Journal of Conservative Dentistry ◽

10.4103/0972-0707.42383 ◽

2006 ◽

Vol 9 (3) ◽

pp. 110

Author(s):

JayaP Daniel ◽

Vasundhara Shivanna

Keyword(s):

In Vitro Study ◽

Vitro Study ◽

Temperature Changes ◽

Pulpal Temperature

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THE EFFECT OF CURCUMA XANTHORRHIZA ETHANOL EXTRACT ON THE VIABILITY OF STREPTOCOCCUS MUTANS AND AGGREGATIBACTER ACTINOMYCETEMCOMITANS (DENTAL BIOFILM RESEARCH: IN VITRO STUDY)

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10s5.23087 ◽

2017 ◽

Vol 10 (17) ◽

pp. 30

Author(s):

Royan Diana ◽

Hedijanti Joenoes ◽

Ariadna A Djais

Keyword(s):

Streptococcus Mutans ◽

In Vitro Study ◽

Ethanol Extract ◽

Single Species ◽

Aggregatibacter Actinomycetemcomitans ◽

Vitro Study ◽

Dental Biofilm ◽

Significant Difference ◽

Curcuma Xanthorrhiza

Objective: This study aimed to compare the effect of Curcuma xanthrorrhiza ethanol extract to the viability of Streptococcus mutans and Aggregatibacter actinomycetemcomitans using single- and dual-species biofilm at different phases of formation.Methods: Biofilm models were incubated for 4, 12, and 24 hrs, then exposed to the extract at a concentration of 0.525%.Results: The viability of the single-species S. mutans biofilm was low (p<0.05), and no significant difference (p>0.05) was found between singlespeciesA. actinomycetemcomitans and dual-species biofilm.Conclusions: Curcuma xanthorrhiza ethanol extract is more effective for decreasing the viability of single-species S. mutans biofilm.

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Investigating the impact of alpha/beta and LET d on relative biological effectiveness in scanned proton beams: An in vitro study based on human cell lines

Medical Physics ◽

10.1002/mp.14212 ◽

2020 ◽

Vol 47 (8) ◽

pp. 3691-3702 ◽

Cited By ~ 2

Author(s):

Elisabeth Mara ◽

Monika Clausen ◽

Suphalak Khachonkham ◽

Simon Deycmar ◽

Clara Pessy ◽

...

Keyword(s):

Cell Lines ◽

Human Cell ◽

Relative Biological Effectiveness ◽

In Vitro Study ◽

Vitro Study ◽

Human Cell Lines ◽

Biological Effectiveness ◽

Alpha Beta ◽

The Impact

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Bond Strength Evaluation of Inlay-Retained Resin-Bonded Fixed Partial Dentures with Two Different Cavity Designs and Two Different Adhesive Systems: In Vitro Study

Balkan Journal of Dental Medicine ◽

10.2478/bjdm-2020-0004 ◽

2020 ◽

Vol 24 (1) ◽

pp. 21-28

Author(s):

Ediz Kale ◽

Ayça Deniz İzgi ◽

Remzi Niğiz

Keyword(s):

Bond Strength ◽

In Vitro Study ◽

Adhesive System ◽

Vitro Study ◽

Aqueous Environment ◽

Cement Interface ◽

Significant Difference ◽

Mode Of Failure ◽

Slot Cavity

SummaryBackground/Aim: The purpose of this in-vitro study was to compare the resin-bonded fixed partial dentures (RBFPD) fabricated using two different structural designs and two different antibacterial adhesive lutting protocols in regard to their resistance to debonding.Material and Methods: Forty samples for a model with single missing molar were divided into 4 groups (M1, M2, C1, C2) (n=10). M1 and M2 were prepared in accordance with modified inlay slot-cavity retained RBFPD design; C1 and C2 were prepared according to conventional inlay slot-cavity retained RBFPD design. M1 and C1 cavities were treated with 2% chlorhexidine-based (CHX) cavity disinfectant and 10-methacryloyloxydecyl dihydrogen phosphate (MDP) containing adhesive system; M2 and C2 cavities were treated with MDP and 12-methacryloyloxydodecylpyridinium bromide (MDPB) containing adhesive system featuring antibacterial cavity cleansing effect. The RBFPDs were made of base-metal alloy and their fit surfaces sandblasted with aluminium oxide (Al2O3). Adhesive resin cement was used for cementation, and the RBFPD retainers were interlocked into their corresponding inlay cavities using composite resin. After 1 week being immersed in aqueous environment, the RBFPDs were subjected to tensile loading at a crosshead speed of 1 mm/min until failure. One way ANOVA and Tukey HSD tests were used for statistical evaluation (α=0.05). Mode of failure and tooth damage was also noted.Results: Mean tensile bond strength values were 356 N for M1, 305 N for M2, 467 N for C1, and 455 N for C2. Tensile strength values of C1 and C2 were significantly higher than those of M1 and M2 (p<0.05). The mode of failure was mostly adhesive in character at the metal-cement interface in all groups. Tooth fracture was observed nearly in all specimens. No significant difference was detected between the antibacterial adhesive lutting protocols (p>0.05).Conclusions: The RBFPDs with the conventional design were found to be more retentive than those with the modified design. Using an adhesive system featuring antibacterial properties with no need of separate antibacterial agent application during bonding may be favourable.

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