In Vitro Enamel Thickness Measurements with Ultrasound

Sindi, Khalid Hussain; Bubb, N. L.; Gutteridge, D L; Evans, JA

doi:10.1016/j.ultrasmedbio.2014.08.005

Cited by 15 publications

(8 citation statements)

References 33 publications

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“…Therefore, reliable methods capable of determining the setting process of impression material at every step of polymerization are necessary, and these measurement procedures should be performed with minimal time delay. Ultrasonic imaging is a noninvasive technique that offers considerable potential for diagnosis, is a valuable tool for research [11][12][13][14] , and allows measurement of dentin thickness 15,16) . It also allows for monitoring the setting process of impression material because the sound velocity is dependent on the elastic modulus and the attenuation coefficient correlates with the viscoelastic properties of elastomers 17,18) .…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic monitoring of the setting of silicone elastomeric impression materials

et al. 2017

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This study used an ultrasonic measurement device to monitor the setting behavior of silicone elastomeric impression materials, and the influence of temperature on setting behavior was determined. The ultrasonic device consisted of a pulser-receiver, transducers, and an oscilloscope. The two-way transit time through the mixing material was divided by two to account for the down-and-back travel path; then it was multiplied by the sonic velocity. Analysis of variance and the Tukey honest significant difference test were used. In the early stages of the setting process, most of the ultrasonic energy was absorbed by the elastomers and the second echoes were relatively weak. As the elastomers hardened, the sonic velocities increased until they plateaued. The changes in sonic velocities varied among the elastomers tested, and were affected by temperature conditions. The ultrasonic method used in this study has considerable potential for determining the setting processes of elastomeric impression materials.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic monitoring of the setting of silicone elastomeric impression materials

et al. 2017

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“…Therefore, the present study used ultrasound in order to indicate when an endodontic sealer had set completely. Variations in the speed of sound passing through a sample provides information on its viscoelastic properties, so that the faster the speed of sound, the greater the density of the material (Bozkurt et al, 2005; Sindi et al, 2015; Tsujimoto et al, 2019). The method involves short ultrasonic pulses (speed 90 m/s) that pass through the sample, but do not accumulate energy in the molecules of the material.…”

Section: Discussionmentioning

confidence: 99%

“…Such properties make it possible to use Ultrasound to detect cavities and measure enamel and dentine thickness (Bozkurt et al, 2005; Matalon et al, 2007; Ng et al, 1989; Peck et al, 1989; Watanabe et al, 2004; Yasuda et al, 2007), as well as assess the mechanical properties of dental materials (Denisova et al, 2004) and the adhesive interfaces (Yasuda et al, 2007). Considering that the speed of propagation of ultrasonic waves, which occurs by converting electrical or magnetic energy into mechanical energy (Plotino et al, 2007), is greater in solids than liquids (Sindi et al, 2015), there is a potential application of this technology to determine the setting time of root canal sealers, and even more, it can be able to indicate if the sealer is completely set or not. Therefore, the present study was designed to present and explore the potential of an ultrasound‐based experimental model to determine the setting time of root canal sealers.…”

Section: Introductionmentioning

confidence: 99%

An ultrasonic‐based experimental model to evaluate the setting time of endodontic sealers

et al. 2021

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Aim To evaluate an ultrasonic‐based experimental model (US), to assess the setting time of AH Plus®, Bio‐C Sealer® and MTA Fillapex®, and compare the results obtained with ANSI/ADA specifications (2012). Methods To determine the setting time according to the ANSI/ADA specification, moulds measuring 10 mm (diameter) × 2 mm (thickness) were used, and for the US tests a transducer (1 MHz) and an oscilloscope were used. Fourier‐transform infrared spectroscopy (FTIR) was used to evaluate the changes on chemical structure at the different setting times found by the US and ANSI/ADA methods. After checking the normal distribution, setting time data were analysed using unilateral analysis of variance with Tukey‐HSD post‐test to compare the methods. Results AH Plus® and Bio‐C Sealer® had longer mean setting time values for the US method than for the ANSI/ADA (p < .05), whilst for MTA Fillapex® no significant difference was found between the methods (p < .05). FTIR spectra demonstrated that at the setting time determined by the US method, AH Plus® and Bio‐C Sealer® were in a more advanced stage of polymerization than at the ANSI/ADA, whilst there was no significant difference for MTA Fillapex®. Conclusions The use of US was effective for setting time determination and measured longer values than ANSI/ADA specification for AH Plus® and Bio‐C Sealer®, identifying the entire (and not only superficial) setting of the endodontic sealers.

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“…Subsequently, several researchers carried out ultrasonic investigations on dental tissues and their results confirmed that ultrasound as tested in-vitro shows considerable promise for the assessment of tooth layers, tooth surface demineralization and types of dentin [2][3][4]. Recently, ultrasound is being used for early caries detection [5], assessment of sound dentin [6] and enamel thickness [7], visibility of pulp spaces [8], assessment of gingival thickness [9], dental implants placement [10], measurement of bone thickness surrounding implants [11] and accuracy of tooth impressions [12]. Lately, extensive reviews of ultrasound imaging advances in dentistry were published by Marotti et al [13] and Kocasarac & Angelopoulos [14].…”

Section: Introductionmentioning

confidence: 95%

Investigations of Sound and Carious Dentin Using Ultrasound Velocity and Scanning Electron Microscopy-An In-vitro Study

Eldarrat¹

2020

ADOH

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Aim: To investigate structural changes in human dentin due to aging process or caries using ultrasound velocity and scanning electron microscopy (SEM).Materials and Methods: An in-vitro study conducted on human dentin samples. Dentin samples were prepared from the extracted molars using a computerized water-cooled cutting machine. Each sample was 7mm long, 5mm wide and 2mm thick [± 0.1mm]. Fifteen dentin samples were prepared for the three experimental groups. Each group consists of five dentin samples. Group 1 (20year old sound dentin), group 2 (50year old sound dentin) and group 3 (carious dentin). Ultrasound velocity measurements were carried-out on dentin samples and the data were compiled and analyzed using Wave Star software and Minitab 12.1 software. After the ultrasonic measurements, the dentin samples were characterized using SEM.Results: Ultrasonic measurements showed that the arrival time of wave signal was 35.1µs in 50year old dentin, 35.8µs in 20year old dentin and 36.4µs in carious dentin, and there were significant differences (p < 0.05 at 95% confidence level) in the mean values of the ultrasonic velocity measurements between group 1 and group 2, and between group 2 and group 3. Based on the SEM micrographs, the structural changes can be seen clearly in 50year old dentin due to the aging process and in carious dentin due to caries. Conclusion:Results indicated that structural changes of human dentin due to aging process and caries can be distinguished using ultrasonic velocity, however, further work is required on larger sample size, intermediate ages and restored teeth.

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In Vitro Enamel Thickness Measurements with Ultrasound

Abstract: Ultrasound measurements showed good agreement with histology which highlights its potential for monitoring the progressive loss of enamel thickness in erosive tooth surface loss (TSL).

Cited by 15 publications

References 33 publications

Ultrasonic monitoring of the setting of silicone elastomeric impression materials

Ultrasonic monitoring of the setting of silicone elastomeric impression materials

An ultrasonic‐based experimental model to evaluate the setting time of endodontic sealers

Investigations of Sound and Carious Dentin Using Ultrasound Velocity and Scanning Electron Microscopy-An In-vitro Study

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