scholarly journals Evaluation Of The Effectiveness Of The Use Of Optical Systems In The Restoration Of Defects In The Hard Tissues Of The Tooth

2021 ◽  
Vol 03 (05) ◽  
pp. 65-67
Author(s):  
Xolboyeva Nasiba Asrorovna ◽  
◽  
Davronov Sodiqjon Valojon O’g’li ◽  
Turaeva Kamila Furkat Kizi ◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Optical Systems ◽  
Naked Eye ◽  
Dental Restorations ◽  
Carious Lesions ◽  
Hard Tissues ◽  
Aesthetic Dentistry

"Perfection is achieved not when there is nothing to add, but when there is nothing to remove" Antoine de Saint-Exupery Presents the results of a study of the performance of aesthetic and artistic restorations and the study of these dental restorations after a certain time with the naked eye and binoculars of two types, while the use of a SLR camera was a prerequisite. Comparative analysis has shown that the use of optical systems during dental manipulations significantly improves the diagnosis of carious and non-carious lesions, facilitates work and reduces the risk of various complications. Clinical photographs are an important component of aesthetic dentistry.

scholarly journals A Comparative Analysis by LVSEM and DSC of Some Mineralized Biological Hard Tissues: Bone, Dentin and Ostrich Eggshell

2003 ◽  
Vol 9 (S02) ◽  
pp. 210-211
Author(s):  
L. Bucio ◽  
I. A. Belío ◽  
A. Heredia ◽  
L. F. Lozano ◽  
M. A. Peña-Rico ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Hard Tissues ◽  
Ostrich Eggshell

scholarly journals Pronounced Effect of Antibacterial Bioactive Dental Composite on Microcosm Biofilms Derived From Patients With Root Carious Lesions

2020 ◽  
Vol 7 ◽  
Author(s):  
Abdulrahman A. Balhaddad ◽  
Maria S. Ibrahim ◽  
Isadora M. Garcia ◽  
Fabrício M. Collares ◽  
Michael D. Weir ◽  
...  
Keyword(s):  
Dental Plaque ◽  
Lactic Acid Production ◽  
Resin Composites ◽  
Dental Resin ◽  
Biofilm Growth ◽  
Restorative Treatment ◽  
Dental Restorations ◽  
Dental Resin Composites ◽  
Carious Lesions ◽  
Active Root

Resin composites are the material of choice for dental restorative treatment in oral health care. However, the inherent composition of this class of material commonly results in microbial adherence and colonization, which carries the potential risk of recurrent carious lesions around dental restorations. The high risk of resin composites failure complicates the treatment of root caries, defined as the onset of tooth decay over the prone root surface of a tooth. The restorative treatment of root caries among high caries risk individuals, especially for senior patients, is a challenging, painful, and costly. The dysbiotic microbiota colonizes the composite’s surfaces and forms polymicrobial biofilms that are difficult to be dislodged by regular tooth brushing. This study assesses the antibiofilm performance of a surface contact killing antibacterial dental resin composites on the growth of microcosm biofilms using dental plaque sampled from patients with active root carious lesions as an inoculum. The designed formulations contain dimethylaminohexadecyl methacrylate (DMAHDM), a tailored quaternary ammonium monomer with an alkyl chain length of 16, at 3–5 wt.% in a base resin with and without 20 wt.% nanoparticles of amorphous calcium phosphate (NACP). Biofilms were grown on the tested resin composites using a 48 h plaque-derived microcosm biofilm model. Dental plaque collected from active root carious lesions was used as an inoculum to emulate the microbiota present in those lesions. The biofilm growth was assessed via the colony-forming unit (CFU) counts in four culture media, metabolic behavior, lactic acid production, and confocal microscopy. The percentage of reacted double bonds of the formulations was also investigated. The dental resin composites formulated with 3–5 wt.% DMAHDM and 20 wt.% NACP were effective at eradicating surface-attached biofilms from the total microbial load and each relevant cariogenic group: total streptococci, mutans streptococci, and lactobacilli. The metabolic activities and lactic acid production of the plaque-derived microcosm biofilms were reduced by 80–95%, respectively. Fewer viable microorganisms were observed over resin composites containing DMAHDM and NACP. Besides, all the experimental formulations demonstrated an acceptable degree of conversion values. This new strategy fits with ongoing dental caries preventive and minimally invasive approaches by preventing biofilm growth over-restored carious root lesions and improving the lifespan of dental restorations.

In Vitro Study of Carious Lesions Around Dental Restorations

1970 ◽  
Vol 49 (4) ◽  
pp. 756-759 ◽  
Author(s):  
A.Y. Atto ◽  
S. Rosen ◽  
R. Taylor
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Dental Restorations ◽  
Carious Lesions

scholarly journals Diagnostics of non-carious lesions of dental hard tissues with the methods of optical spectroscopy and radiography

2020 ◽  
Vol 23 (2) ◽  
Author(s):  
Iraida Sarycheva ◽  
Oleg Yanushevich ◽  
Dmitriy Minakov
Keyword(s):  
Computed Tomography ◽  
Morphological Structure ◽  
Dental Erosion ◽  
Spiral Computed Tomography ◽  
Spiral Computed ◽  
Tooth Demineralization ◽  
Carious Lesions ◽  
Dental Hard Tissues ◽  
Hard Tissues

Objective: This work aims to use new spectroscopic and radiographic methods to study the dental hard tissue erosion and abfraction, as these lesions are actually quite difficult to be diagnosed in clinical practice. Material and Methods: This in vivo study was conducted on 60 patients with early erosion and 60 patients with abfraction at the cervical area by means of laser-induced fluorescence (LIF) and multilayer spiral computed tomography (MSCT). Results: In comparative dental hard tissues studies LIF spectra from intact and affected areas, it was noted multidirectional fluorescence intensity dependence between areas affected by abfraction and intact areas. MSCT technique allowed assessing the degree of damaged areas, especially at deeper stages. Conclusion: Although LIF and MSCT methods presented limitations, it was shown their effectiveness in the diagnosis of abfraction and erosion by detecting changes in the morphological structure as well as in the chemical and mineral composition of affected dental hard tissues. So LIF and MSCT methods can be successfully used in order to develop new medical devices which will provide most accurate clinical diagnose of different stages of dental erosion and abfraction.KEYWORDSFluorescence spectroscopy; Spiral computed tomography; Tooth demineralization; Tooth erosion.

scholarly journals Phenotypic and Genotypic Selection of Microbiota Surviving under Dental Restorations

2005 ◽  
Vol 71 (5) ◽  
pp. 2467-2472 ◽  
Author(s):  
J. S. Paddick ◽  
S. R. Brailsford ◽  
E. A. M. Kidd ◽  
D. Beighton
Keyword(s):  
Serum Proteins ◽  
Genotypic Diversity ◽  
Salivary Secretion ◽  
Dentinal Tubules ◽  
Actinomyces Naeslundii ◽  
Dental Restorations ◽  
Final Sample ◽  
Carious Lesions ◽  
Carious Dentine ◽  
Selection Of

ABSTRACT The effects of sealing infected carious dentine below dental restorations on the phenotypic and genotypic diversity of the surviving microbiota was investigated. It was hypothesized that the microbiota would be subject to nutrient limitation or nutrient simplification, as it would no longer have access to dietary components or salivary secretion for growth. The available nutrients would be limited primarily to serum proteins passing from the pulp through the patent dentinal tubules to the infected dentine. Ten lesions were treated, and infected dentine was sealed below dental restorations for approximately 5 months. Duplicate standardized samples of infected dentine were taken at baseline and after the removal of the restorations. The baseline microbiota were composed primarily of Lactobacillus spp., Streptococcus mutans, Streptococcus parasanguinis, Actinomyces israelii, and Actinomyces gerencseriae. None of these taxa were isolated among the microbiota of the dentine samples taken after 5 months, which consisted of only Actinomyces naeslundii, Streptococcus oralis, Streptococcus intermedius, and Streptococcus mitis. The microbiota of the final sample exhibited a significantly (P < 0.001) increased ability to produce glycosidic enzymes (sialidase, β-N-acetylglucosaminidase, and β-galactosidase), which liberate sugars from glycoproteins. The genotypic diversity of S. oralis and A. naeslundii was significantly (P = 0.002 and P = 0.001, respectively) reduced in the final samples. There was significantly (P < 0.001) greater genotypic diversity within these taxa between the pairs of dentine samples taken at baseline than was found in the 5-month samples, indicating that the dentine was more homogenous than it was at baseline. We propose that during the interval between placement of the restorations and their removal, the available nutrient, primarily serum proteins, or the relative simplicity and homogeneity of the nutrient supply significantly affected the surviving microbiota. The surviving microbiota was less complex, based on compositional, phenotypic, and genotypic analyses, than that isolated from carious lesions which were also exposed to salivary secretions and pH perturbations.

The Effect of Vibration on Visual Acuity with Electro-Optical Aids to Night Vision

1971 ◽  
Vol 13 (4) ◽  
pp. 369-378 ◽  
Author(s):  
Jo Ann S. Kinney ◽  
S. M. Luria ◽  
Howard Markowitz
Keyword(s):  
Visual Acuity ◽  
Night Vision ◽  
Optical Systems ◽  
Naked Eye ◽  
Power Standard

Visual acuity at a level of illumination comparable to overcast starlight was measured at various frequencies and amplitudes of vibration chosen to be representative of conditions aboard various ships. Measures were made with electro-optical scopes of four-power and one-power, standard Navy 7×50 binoculars, four-power field glasses, and the naked eye. Decrements in acuity under vibration were largest for the four-power scope and least for the naked eye. The decrements were, in fact, directly related to the original acuity level determined for the specific optical systems with no vibration. Despite the loss, vision with the four-power electro-optical aid remained superior to that with any other system under all conditions. The importance of antivibration mounts is emphasized.

Influence of orthodontic treatment on the state of dental hard tissues, prevention of complications

MedAlliance ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 56-62
Keyword(s):  
Oral Hygiene ◽  
Orthodontic Treatment ◽  
Comparative Assessment ◽  
Treatment Results ◽  
Treat Ment ◽  
Carious Lesions ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Before And After ◽  
Removable Appliances

SummaryOrthodontic treatment of dentoalveolar anomalies is car-ried out using fixed and removable appliances, which af-fects the homeostasis of the oral cavity and increases the risk of developing carious lesions of the enamel. Purpose of the study: comparative assessment of the level of oral hygiene and the prevalence of enamel carious lesions at the stage of orthodontic treatment using removable and non-removable appliances. Materials and methods:90 patients aged 18 to 35 years were examined: 45 patients of the 1st group, who were treated with aligners, and 45 patientsof the second group, who were treated with a bracket system. In all patients, the level of oral hygiene was determined by the OHI-S (Green-Vermillion) index, as well as the level of CPU before and after 12 months of orthodontic treatment. Results: before the start of orth-odontic treatment, the OHI-S index in patients of the first and second groups was 0.86±0.67 and 0.89±0.74 points, respectively. After 12 months, there was a deterioration in the parameters of oral hygiene to a greater extent in patients of the second group who were treated with a fixed technique: the OHI-S index was 1.98±0.79 points. The value of the CPU index before the start of orthodontic treatment in patients of the first and second groups was 7.1±1.32 and 6.9±1.46, respectively. After 12 months of orthodontic treatment, there was an increase in the CPU index in the studied persons of the second group, who were treated with a bracket system: the CPU index was 13.6±1.78. In patients of the first group, the CPU indica-tor practically did not change and amounted to 7.9±1.25. Conclusion: with high caries susceptibility and the pre-sence of non-carious enamel lesions, orthodontic treat-ment with removable appliances should be preferred in order to avoid the development of complications.

Impact of teeth color determination on dental eshtetic perception

2015 ◽  
Vol 61 (3) ◽  
pp. 238-242
Author(s):  
Raluca Drăghici ◽  
◽  
Cristina Teodora Preoteasa ◽  
Ana Maria Cristina Tancu ◽  
Elena Preoteasa ◽  
...  
Keyword(s):  
Universal Language ◽  
Dental Restorations ◽  
Evaluation Protocol ◽  
Dental Aesthetics ◽  
Correct Determination ◽  
Aesthetic Aspect ◽  
The Aesthetic ◽  
Increase In Accuracy ◽  
Aesthetic Dentistry ◽  
Training Exercises

Aim. People with attractive facial appearance are more easily integrated in society and are considered to be more capable, more intelligent and more responsible. The aesthetic aspect is influenced by expression, by facial symmetry, facial contours and teeth colour. In dental restorations, the correct determination of teeth colour is a critical step with extreme importance for successful treatment. From this perspective the practitioner must have experience, must have the ability to distinguish colours and must train through repetitive visual practical exercises that can have an impact on the perception of dental aesthetics. Materials and method. The study followed comparatively the evolution of teeth colour determination and its impact on dental aesthetics perception. It was conducted on a group of fifth year students from the Faculty of Dental Medicine, Bucharest using the Tooth Training Box colour determination exercise that is based on the 3-D Master colour key principle. Results. Using training exercises to determine colour participants developed a better understanding of the physical principles behind the procedure but also a significant increase in accuracy of their measurements and confidence in their colour determinations. Conclusions. Using an aesthetic evaluation protocol that translates teeth colour in a universal language for both practitioners as well as dental technicians has a significant impact in aesthetic dentistry.

scholarly journals Improvement of methods of diagnostics, classification of tooth enamel microfissures and of method for evaluating the effectiveness of their treatment

2019 ◽  
Vol 85 (4) ◽  
pp. 121-126
Author(s):  
I.I. Zabolotnaia
Keyword(s):  
Tooth Enamel ◽  
Dental Enamel ◽  
Clinical Diagnostics ◽  
Optical Systems ◽  
Cervical Lesions ◽  
Lighting Condition ◽  
Prophylactic Measures ◽  
Hard Tissues ◽  
The Given

In clinical practice it is often diagnosed precervical lesions: wedge-shaped defect, precervical caries and fissures. The scientific research reveals results of application of an electrometric method for diagnostics of microfissures of teeth hard tissues. Use of this method will allow not only to make a pre-clinical diagnostics of the given pathology, but also to evaluate efficiency of the taken treatment-and-prophylactic measures. 16.70 % of cases the type of dental enamel fissures diagnosed before research, depending on complexity of their revealing, mismatched the received results of width of their disclosing. So, before the preparation of precervical pathology, we recommend to classify the diagnosed enamel microfissures of vestibular surface into two types: I – fissures, which are visible after using additional lighting, drying, optical systems, diagnostic dye, determining the electrical resistance, using of transillumination and other additional methods; ІІ – fissures, which are visible to the naked eye under normal lighting condition. Application of the proposed qualification of incomplete microfissures will promote to improving the effectiveness of surgical treatment of cervical lesions of teeth hard tissues.

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