METHODS FOR ELIMINATION OF DENTAL DISCOLORITIS

2021 ◽  
pp. 53-59
Author(s):  
Melenberg T.V. ◽  
Titova O.Yu. ◽  
Burov A.I. ◽  
Levina N.M. ◽  
Solodchenko Yu.V. ◽  
...  
Keyword(s):  
Clinical Situation ◽  
Urgent Problem ◽  
Third Place ◽  
Tooth Discoloration ◽  
Direct Restoration ◽  
Increased Sensitivity ◽  
General Dentists

Discoloration of teeth is an urgent problem of modern dentistry. This is a very common and multifactorial pathology in nature. With this problem, patients turn to dentists of various profiles. This work analyzes the frequency of using various methods for eliminating discoloration of teeth. A survey of 50 doctors of various specializations was conducted and it was found that for the period from September to November 2020, clinical enamel whitening was carried out in 22,5% of patients with tooth discoloration, intracoronal bleaching followed by direct restoration (replacement of existing fillings with new ones) in 30%, covering the vestibular surface of the teeth located in the smile line with ceramic veneers in 22,5% and total prosthetics in 25%. The analysis showed that at present the arsenal of a dentist is quite wide and, depending on the clinical situation taking into account the wishes of the patient and his capabilities, the doctor can choose a way to eliminate the discoloration of the teeth suitable for a particular patient. In addition, the use of this problem is higher among general dentists – 9,4%, in second place in terms of accessibility are dentists orthopedists - 8%, and in third place are dentists therapists – 6,5%. The problem of teeth discoloration, especially accompanied by increased sensitivity, does not lose its relevance in modern dentistry. It seems necessary to develop, test and implement means and methods for quickly and gently eliminating discoloration of teeth, which will not only correct, change the color of the tooth, but also solve the problem of increased sensitivity of teeth.

THERAPEUTIC METHODS FOR TREATMENT OF DENTAL DISCOLORITIS

2021 ◽  
pp. 114-120
Author(s):  
Melenberg T.V. ◽  
Titova O.Yu. ◽  
Burov A.I. ◽  
Levina N.M. ◽  
Linnik L.N. ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Enamel Coating ◽  
Tooth Enamel ◽  
Clinical Situation ◽  
Single Bond ◽  
Dental Clinics ◽  
Tooth Discoloration ◽  
Direct Restoration ◽  
Increased Sensitivity ◽  
General Dentists

The problem of discoloration of teeth, especially accompanied by increased sensitivity, does not lose its relevance in modern dentistry. Despite the presence in the arsenal of dentists of a significant number of means and methods for solving this problem, it does not go away, but, on the contrary, is overgrown with new complaints. In this work, we analyzed the frequency to analyze the frequency of choice of therapeutic methods for treating discoloration of teeth by patients of dental clinics. A questionnaire was developed for a dentist on the patient's choice of a therapeutic method for eliminating dental discoloration and a survey of 30 dentists (10 - therapists, 10 - orthopedists and 10 - general dentists) was conducted for 2019 and 6 months of 2020. It was found that during this period, 184 out of 331 patients who applied to dental clinics with this problem used therapeutic methods for eliminating tooth discoloration: tooth enamel coating with varnish ("Colordent" + adhesive "Single Bond") was carried out in 16.6% of patients, clinical bleaching of enamel in 32.6% of patients with tooth discoloration, intracoronal bleaching followed by direct restoration (replacement of existing fillings with new ones) in 53.8%. The analysis showed that therapeutic methods for eliminating discoloration of teeth predominate slightly, 55%. Of course, in choosing this direction, the doctor is guided by the clinical situation, IROPZ, taking into account the wishes of the patient and his capabilities. However, it seems necessary to develop and test new, gentle and resistant to mechanical stress methods for eliminating discoloration of economy-class teeth with the possibility of solving the problem of increased tooth sensitivity.

Management of discolored tissues after endodontic treatment in direct composite reconstructions

2020 ◽  
Vol 18 (1) ◽  
pp. 59-64
Author(s):  
D. Pisuk
Keyword(s):  
Clinical Case ◽  
Soft Tissues ◽  
Treatment Plan ◽  
Endodontic Treatment ◽  
Anterior Maxilla ◽  
Tooth Discoloration ◽  
Causative Factors ◽  
Direct Restoration ◽  
Maxillary Incisors ◽  
Blue Gum

Internal tooth discoloration is a problem in aesthetic restorations in the anterior maxilla, which requires analysis of many causative factors, assessment of restoration possibilities, as well as aesthetics of soft tissues, including the position of the lips with regards to a smile and the often encountered blue gum zenith. This article presents a clinical case in which an aesthetic direct restoration of the maxillary incisors was performed as an alternative to prosthodontic treatment after drawing up a treatment plan and determining indications.

Detection of viruses by electron microscopy: Increased sensitivity by direct micro-ultracentrifugation of samples

1987 ◽  
Vol 45 ◽  
pp. 908-909
Author(s):  
Alain R. Trudel ◽  
M. Trudel
Keyword(s):  
Electron Microscopy ◽  
Fold Increase ◽  
Observation Time ◽  
Clinical Samples ◽  
Maximum Speed ◽  
Viral Particles ◽  
Structural Details ◽  
Latex Spheres ◽  
Increased Sensitivity ◽  
Size Of Particles

AirfugeR (Beckman) direct ultracentrifugation of viral samples on electron microscopy grids offers a rapid way to concentrate viral particles or subunits and facilitate their detection and study. Using the A-100 fixed angle rotor (30°) with a K factor of 19 at maximum speed (95 000 rpm), samples up to 240 μl can be prepared for electron microscopy observation in a few minutes: observation time is decreased and structural details are highlighted. Using latex spheres to calculate the increase in sensitivity compared to the inverted drop procedure, we obtained a 10 to 40 fold increase in sensitivity depending on the size of particles. This technique also permits quantification of viral particles in samples if an aliquot is mixed with latex spheres of known concentration.Direct ultracentrifugation for electron microscopy can be performed on laboratory samples such as gradient or column fractions, infected cell supernatant, or on clinical samples such as urine, tears, cephalo-rachidian liquid, etc..

Preplate neurons in embryonic mouse cortex: Ultrastructural observations using photoconversion of the fluorescent lipophilic dye dil

1992 ◽  
Vol 50 (1) ◽  
pp. 906-907
Author(s):  
Linda C. Hassinger ◽  
James E. Crandall
Keyword(s):  
Mouse Embryos ◽  
Embryonic Mouse ◽  
Cortical Afferents ◽  
Mouse Cortex ◽  
Carbocyanine Dye ◽  
Increased Sensitivity

We have begun to look directly at small numbers of afferent axons to early generated neurons that form the preplate in the developing mouse cortex. The carbocyanine dye Dil (1’1, dioctadecyl-3,3,3’3’-tetramethyl-indocarbocyanine) has proved especially useful for this goal. DiI labels axons and their terminals with greater sensitivity and without some of the disadvantages of axon filling with HRP. The increased sensitivity provided by labeling embryonic axons with DiI has given us new insights into the development of cortical afferents. For instance, we reported originally that afferents from the thalamus were present below the cortex as early as embryonic day 15 (E15) based on HRP injections into mouse embryos. By using DiI placements into the thalamus in aldehyde-fixed brains, we now know that thalamic fibers reach the cortex 24 hrs earlier.

Bayesian removal of noise for increased sensitivity in vector pattern recognition lattice imaging of interfaces

1993 ◽  
Vol 51 ◽  
pp. 994-995
Author(s):  
L. Fei ◽  
P. Fraundorf
Keyword(s):  
Pattern Recognition ◽  
Perfect Crystal ◽  
Unit Cell ◽  
Ion Milling ◽  
Beam Radiation ◽  
Major Interest ◽  
Unit Cells ◽  
Mapping Process ◽  
Increased Sensitivity ◽  
Electron Microscopes

Interface structure is of major interest in microscopy. With high resolution transmission electron microscopes (TEMs) and scanning probe microscopes, it is possible to reveal structure of interfaces in unit cells, in some cases with atomic resolution. A. Ourmazd et al. proposed quantifying such observations by using vector pattern recognition to map chemical composition changes across the interface in TEM images with unit cell resolution. The sensitivity of the mapping process, however, is limited by the repeatability of unit cell images of perfect crystal, and hence by the amount of delocalized noise, e.g. due to ion milling or beam radiation damage. Bayesian removal of noise, based on statistical inference, can be used to reduce the amount of non-periodic noise in images after acquisition. The basic principle of Bayesian phase-model background subtraction, according to our previous study, is that the optimum (rms error minimizing strategy) Fourier phases of the noise can be obtained provided the amplitudes of the noise is given, while the noise amplitude can often be estimated from the image itself.

Characteristics of general dentists participating in home study courses

1996 ◽  
Vol 60 (8) ◽  
pp. 686-692 ◽  
Author(s):  
RA Kuthy ◽  
TM Bean ◽  
GL Mitchell
Keyword(s):  
Home Study ◽  
General Dentists

The Effect of Stapedectomy on the Loudness of One’s Own Voice

1965 ◽  
Vol 8 (3) ◽  
pp. 223-234 ◽  
Author(s):  
William Melnick
Keyword(s):  
Middle Ear ◽  
Normal Subjects ◽  
Sound Energy ◽  
Loudness Function ◽  
Before And After ◽  
Increased Sensitivity

Five subjects with normal middle ear mechanisms, and otosclerotic patients, before and after stapedectomy, matched the loudness of their voices to the loudness of a 125-cps-sawtooth noise. The results showed loudness matching functions with gradual slopes, less than 1.00, for the normal subjects and the patients prior to stapedectomy. Post-surgically, the loudness function for the patients increased in steepness to considerably more than 1.00. These results are explained, most logically, in terms of increased sensitivity of the altered middle ear to sound energy generated by the listener’s own voice.

Modified Earpieces and CROS for High Frequency Hearing Losses

1968 ◽  
Vol 11 (1) ◽  
pp. 204-218 ◽  
Author(s):  
Elizabeth Dodds ◽  
Earl Harford
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Hearing Aid ◽  
Sound Field ◽  
Intensity Level ◽  
Test Results ◽  
High Frequency Hearing Loss ◽  
Increased Sensitivity ◽  
Difficult Cases

Persons with a high frequency hearing loss are difficult cases for whom to find suitable amplification. We have experienced some success with this problem in our Hearing Clinics using a specially designed earmold with a hearing aid. Thirty-five cases with high frequency hearing losses were selected from our clinical files for analysis of test results using standard, vented, and open earpieces. A statistical analysis of test results revealed that PB scores in sound field, using an average conversational intensity level (70 dB SPL), were enhanced when utilizing any one of the three earmolds. This result was due undoubtedly to increased sensitivity provided by the hearing aid. Only the open earmold used with a CROS hearing aid resulted in a significant improvement in discrimination when compared with the group’s unaided PB score under earphones or when comparing inter-earmold scores. These findings suggest that the inclusion of the open earmold with a CROS aid in the audiologist’s armamentarium should increase his flexibility in selecting hearing aids for persons with a high frequency hearing loss.

Klinische Langzeitergebnisse der perkutanen transluminalen Angioplastie bei Patienten mit peripherer arterieller Verschlusskrankheit

VASA ◽  
2002 ◽  
Vol 31 (1) ◽  
pp. 36-42 ◽  
Author(s):  
. Bucek ◽  
Hudak ◽  
Schnürer ◽  
Ahmadi ◽  
Wolfram ◽  
...  
Keyword(s):  
Success Rate ◽  
Clinical Stage ◽  
Ankle Brachial Index ◽  
Clinical Situation ◽  
Clinical Results ◽  
Transluminal Angioplasty ◽  
Term Outcome ◽  
Long Term Outcome

Background: We investigated the long-term clinical results of percutaneous transluminal angioplasty (PTA) in patients with peripheral arterial occlusive disease (PAOD) and the influence of different parameters on the primary success rate, the rate of complications and the long-term outcome. Patients and methods: We reviewed clinical and hemodynamic follow-up data of 166 consecutive patients treated with PTA in 1987 in our department. Results: PTA improved the clinical situation in 79.4% of patients with iliac lesions and in 88.3% of patients with femoro-popliteal lesions. The clinical stage and ankle brachial index (ABI) post-interventional could be improved significantly (each P < 0,001), the same results were observed at the end of follow-up (each P < 0,001). Major complications occurred in 11 patients (6.6%). The rate of primary clinical long-term success for suprainguinal lesions was 55% and 38% after 5 and 10 years (femoro-popliteal 44% and 33%), respectively, the corresponding data for secondary clinical long-term success were 63% and 56% (60% and 55%). Older age (P = 0,017) and lower ABI pre-interventional (P = 0,019) significantly deteriorated primary clinical long-term success for suprainguinal lesions, while no factor could be identified influencing the outcome of femoro-popliteal lesions significantly. Conclusion: Besides an acceptable success rate with a low rate of severe complications, our results demonstrate favourable long-term clinical results of PTA in patients with PAOD.

Sign in / Sign up

Export Citation Format

Share Document