Dentifrice fluoride and abrasivity interplay on artificial caries lesions. Specimens were kept in artificial saliva in between brushings and overnight. Enamel surface loss SL was determined by optical profilometry after lesion creation, 1, 3 and 5 days. Two enamel sections from baseline and post-brushing areas were obtained and analyzed microradiographically. Brushing with high-abrasive slurry caused more SL than brushing with low-abrasive slurry.
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Dentifrice fluoride and abrasivity interplay on artificial caries lesions. Specimens were kept in artificial saliva in between brushings and overnight. Enamel surface loss SL was determined by optical profilometry after lesion creation, 1, 3 and 5 days. Two enamel sections from baseline and post-brushing areas were obtained and analyzed microradiographically.
Brushing with high-abrasive slurry caused more SL than brushing with low-abrasive slurry. Furthermore, for MeC and CMC, there was a significant mineral gain in the remaining lesions except when brushed with high-abrasive slurries and 0 ppm F. For HEC, a significant mineral gain took place when low-abrasive slurry was used with fluoride. The tested lesions responded differently to the toothbrushing procedures. Both slurry fluoride content and abrasivity directly impacted SL and mineral gain of enamel caries lesions.
Directory of Open Access Journals Sweden. Full Text Available The aim was to evaluate the remineralizing efficacy of fluorohydroxyapatite FHA gel on artificial dentinal caries lesion in vitro. Artificial carious lesions were made on occlusal cavities of teeth by exposing the dentin surface to a demineralizing solution.
The DMD of dentin surface layer significantly increased after it was capped with FHA gel P artificial dentin caries surface and significantly increase the mineral density, which suggests that FHA gel might be a proper IPT material with remineralizing function.
Effect of xylitol varnishes on remineralization of artificial enamel caries lesions in situ. Analyze the effect of varnishes containing xylitol compared to commercial fluoridated varnishes on the remineralization of artificial enamel caries lesions in situ.
Twenty subjects took part in this crossover, double-blind study performed in four phases of 5days each. Each subject worn palatal appliances containing four predemineralized bovine enamel specimens. The varnishes were applied in a thin layer and removed after 6h. Fifteen subjects were able to finish all phases. The enamel alterations were quantified by surface hardness and transversal microradiography.
Xylitol varnishes seem to be promising alternatives to increase enamel remineralization in situ, which should be confirmed by clinical studies. All rights reserved. Effect of xylitol varnishes on remineralization of artificial enamel caries lesions in vitro. Analyse the effect of varnishes containing xylitol alone or combined with fluoride on the remineralization of artificial enamel caries lesions in vitro. Xylitol varnishes seem to be promising alternatives to increase enamel remineralization in vitro, which should be confirmed by in situ and clinical studies.
Bond strength to dentin with artificial carious lesions : influence of caries detecting dye. To evaluate the influence of dyes for caries detection on tensile bond strength of adhesive materials to artificial carious dentin. Buccal and lingual enamel of human molars were removed leaving intact dentin surfaces. The entire surface of each specimen was covered with nail varnish, keeping a window area of 4 x 4 mm. Artificial carious lesions were induced with acidified gel.
Three dyes 0. Control groups were made without dye. Eight samples were tested for each group. After 24 hrs of storage in distilled water, the samples were debonded using a testing machine at 0. Relationships between birefringence and mineral content in artificial caries lesions of enamel. The microradiographic mineral content and birefringence in water and Thoulet's solution were measured at selected points in sections of caries -like lesions.
Birefringence was not related to mineral content in sound superficial enamel immersed in Thoulet's solution or in the lesion body immersed in.
Proximal caries detection using digital subtraction radiography in the artificial caries activity model. The purpose of the experiment was to evaluating the diagnostic ability of dental caries detection using digital subtraction in the artificial caries activity model. The digital radiographic images and subtraction images from artificial proximal caries were examined and interpreted.
In this study, we proposed novel caries detection method which could diagnose the dental proximal caries from single digital radiographic image. The lesional depth and the area were significantly increased with demineralization time p caries detection using digital subtraction radiography showed high detection rate compared to the proximal caries examination using simple digital radiograph.
The results demonstrated that the digital subtraction radiography from single radiographic image of artificial caries was highly efficient in the detection of dental caries compared to the data from simple digital radiograph. ROC analysis of acid demineralized artificial caries. This study is designed to determine the artificial incipient proximal caries lesion detectability by dentists on Ektaspeed Plus film using ROC analysis.
Sixteen premolars and 30 molars, which have 52 proximal caries -like demineralized lesions using acid-gel technique were added to 20 sound premolars and 30 sound molars to make 24 plaster blocks. Each block with 4 teeth and 6 contacting proximal surfaces was placed in an optical bench to take 12 bitewing radiographs with Ektaspeed Plus film.
Thirty-six dentists acted as observers to evaluated the proximal lesions using five rating scales for ROC analysis. They were also asked to determine the presence or absence of the proximal caries. The true status of the proximal caries was established by the consensus of three oral and maxillofacila radiologists. For evaluation of intra-observer agreement, 9 dentist reread the radiographs at an interval of 1 month.
The Pearson correlation coefficient for the intra-observer agreement was 0. Ten observer's data set were degenerated. The mean area under ROC curve from 26 observers was 0. The sensitivity and the specificity of the binary response were 0. The binary response only reveal a single values of sensitivity and the specificity.
The ROC analysis to assess the diagnostic accuracy in caries detection, which producing estimates of sensitivities for all specifities, yield more comprehensive measures of diagnostic performance than single values for sensitivity and specificity.
New, more sophisticated diagnostic tools are needed for the detection and characterization of caries lesions in the early stages of development.
It is not sufficient to simply detect caries lesions , methods are needed to assess the activity of the lesion and determine if chemical or surgical intervention is needed. Previous studies have demonstrated that polarization sensitive optical coherence tomography PS-OCT can be used to nondestructively image the subsurface lesion structure and measure the thickness of the highly mineralized surface zone.
Other studies have demonstrated that the rate of dehydration can be correlated with the lesion activity and that the rate can be measured using optical methods. The main objective of this work was to test the hypothesis that optical methods can be used to assess lesion activity on tooth coronal and root surfaces. Simulated caries models were used to develop and validate an algorithm for detecting and measuring the highly mineralized surface layer using PS-OCT.
This work confirmed that the algorithm was capable of estimating the thickness of the highly mineralized surface layer with high accuracy. Near-infrared NIR reflectance and thermal imaging methods were used to assess activity of caries lesions by measuring the state of lesion hydration.
NIR reflectance imaging performed the best for artificial enamel and natural coronal caries lesion samples, particularly at wavelengths coincident with the water absorption band at nm. However, thermal imaging performed the best for artificial dentin and natural root caries lesion samples. These novel optical methods outperformed the conventional methods ICDAS II in accurately assessing lesion activity of natural coronal and root caries lesions. Infrared-based imaging methods have shown potential for in-vivo applications to objectively assess caries lesion activity in a single examination.
It is likely that if future clinical trials are a success, this novel imaging. This randomized split-mouth controlled clinical trial aimed at assessing the therapeutic effects of infiltration vs. The study showed that infiltration and sealing are significantly better than placebo treatment for controlling caries progression on proximal lesions.
No significant difference Cavity lining after excavating caries lesions. Non-clinical data support this approach, but clinical data are sparse and ambiguous. We aimed at evaluating the benefits and harms of cavity lining using meta-analysis and Trial Sequential Analysis. DATA: We Trial selection, data extraction, and risk of bias assessment were conducted The trials had high risk of bias.
All trials compared no lining versus calcium hydroxide lining after selective caries removal followed by adhesive restoration. Full Text Available The studies on electron microstructure of the effect of the use of products that contain casein phosphopeptide-amorphous calcium fluoride phosphate CPP-ACPF on enamel remineralization are still needed.
It is important method to observe of the morphological changes of teeth in different conditions. Objective: To evaluate the remineralization potential of paste on enamel lesions using scanning electron microscopy SEM.
Methods: Sixty enamel specimens were prepared from extracted human premolars. The specimens were placed in a demineralizing solution for four days to produce artificial carious lesions. The specimens were then randomly assigned to two study groups: group A control group and group B. The control group received no intervention with remineralizing paste.
All 60 specimens were stored in artificial saliva at C. After remineralization, the samples were observed using SEM. Results: The statistical analysis showed a decrease in the lesion area between the demineralized and remineralized samples, but no significant difference was observed in the lesion depth for group B.
Conclusion: The results showed the capacity of CPP-ACPF in supplying calcium and phosphate to the enamel, decreasing the dissolution of the enamel surface and increasing the remineralization of the enamel surface.
Detection activity assessment and diagnosis of dental caries lesions. This article reviews the current methods for detection and assessment of caries lesions focusing on applicability for daily clinical practice. The end point is to arrive at a diagnosis for each caries lesion. Visual inspection aided by a ball-ended probe is essential for caries lesions assessment Using visual inspection, the clinician must decide about the presence, severity and activity of lesions.
After this process Remineralization of artificial enamel lesions by theobromine. This study investigated the remineralization potential of theobromine in comparison to a standard NaF dentifrice.
Músculo elevador del ángulo de la boca
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Osteología canina - Atlas ilustrado de la anatomía de los huesos del perro
Correspondence to :. SUMMARY : Foramen ovale is a surgically important aperture of the skull since it allows approach to and manipulation of the trigeminal ganglion as it lies in the Meckel's cave. This transfacial approach, Hartel's approach, requires two anatomical points for accurate cannulation; the zygomatic point and the pupil point. This study describes the morphology and location of foramen ovale and describes the pupil point in relation to the medial canthus in the Kenyan population.