Analysis of dental caries using laser fluorescence and wavelength sensitive imaging

1994 ◽  
Author(s):  
Barry E. Paton ◽  
Joseph R. Barron ◽  
Kenneth L. Zakariasen
Keyword(s):  
Dental Caries ◽  
Laser Fluorescence

scholarly journals Caries Diagnosis in Dental Practices: Results From Dentists in a Brazilian Community

2019 ◽  
Vol 44 (1) ◽  
pp. E23-E31 ◽  
Author(s):  
EPS Tagliaferro ◽  
A Valsecki Junior ◽  
FL Rosell ◽  
SRC Silva ◽  
JL Riley ◽  
...  
Keyword(s):  
Dental Caries ◽  
Diagnostic Methods ◽  
Laser Fluorescence ◽  
Dental School ◽  
Research Network ◽  
Advanced Degree ◽  
Occlusal Caries ◽  
Caries Diagnosis ◽  
Air Jet ◽  
School Graduation

SUMMARY The aim of this study was to assess practices related to diagnosis of dental caries among dentists (n=217) from Araraquara, São Paulo State, Brazil. Data on sociodemographic information and practitioner characteristics were collected using a pretested questionnaire, and data on practices related to caries diagnosis were gathered by using a translated and culturally adapted questionnaire from the US National Dental Practice-Based Research Network. Descriptive statistics and regression analyses were used for data analysis. Respondents reported using in most of their patients radiographs (Rx) to diagnose proximal caries (59%), explorer (Ex) for the diagnosis of occlusal caries (64%) and on the margins of existing restorations (79%), as well as air jet (AJ) with drying (92%). Magnification (M) (25%), fiber optic transillumination (FOTI; 14%), and laser fluorescence (LF) (3%) were used in the minority of patients. Regression analysis revealed that the following dentists' characteristics were significantly associated (p<0.05) with the use of diagnostic methods on a greater percentage of their patients: advanced degree (Rx, FOTI), higher percentage of patients with individualized caries prevention (Rx, FOTI, M), more years since dental school graduation (Ex, M), and work in an exclusively private practice model (LF). In conclusion, most Brazilian dentists from Araraquara reported they most commonly use visual, tactile, and radiographic imaging for the diagnosis of dental caries. Some dentists' characteristics, such as time from dental school graduation and having a postgraduation course, were associated with the use of certain diagnostic methods.

In Vitro Studies of Laser Fluorescence for Detection and Quantification of Mineral Loss From Dental Caries

1997 ◽  
Vol 11 (4) ◽  
pp. 507-514 ◽  
Author(s):  
A.F. Hall ◽  
E. Deschepper ◽  
M. Ando ◽  
G.K. Stookey
Keyword(s):  
Dental Caries ◽  
Laser Fluorescence ◽  
Image Analysis System ◽  
Caries Management ◽  
Analysis System ◽  
Change In Mean ◽  
Amalgam Restorations ◽  
Mineral Loss ◽  
Detection And Quantification

Laser fluorescence (LF) is thought to be a quantitative technique for the measurement of mineral loss from dental caries. These studies aimed to demonstrate the quantitative nature of LF, by means of transverse microradiography (TMR), in addition to the possible use of LF on small specimens suitable for in situ studies. Studies also aimed to determine the ability of LF to detect caries adjacent to amalgam restorations. The results demonstrated reasonable correlation between both the histological depth and mineral loss measured by TMR compared with the % change in mean fluorescence radiance measured by LF (r = 0.70 and 0.83, respectively). Studies with small specimens demonstrated that in vitro remineralization could be observed with LF for comparison of the demineralized specimen with an undemineralized reference. ANOVA showed significant mineral gain (p < 0.0001). The detection and quantification of mineral loss adjacent to amalgam restorations may have potential for the management of recurrent caries. Studies have demonstrated that LF can detect such mineral loss, and, with refinement of the image analysis system, LF was capable of detecting remineralization. Remineralization of such lesions is controversial, but it is suggested that LF may have a role in secondary caries management.

scholarly journals Prevalence and Relationship Between Dental Caries, Diet and Nutrition, Socioeconomic Status and Oral Hygiene Habits in Children Using Laser Fluorescence Device (Diagnodent)

2014 ◽  
Vol 8 (1) ◽  
pp. 16-23
Author(s):  
A Kumar ◽  
M Goel ◽  
S Dutta ◽  
R Namdev ◽  
R Mehta ◽  
...  
Keyword(s):  
Dental Caries ◽  
Laser Fluorescence ◽  
Preventive Program ◽  
Visual Appearance ◽  
Dentin Caries ◽  
Permanent Molar ◽  
Valuable Adjunct ◽  
Permanent Molars ◽  
First Permanent Molars ◽  
Oral Hygiene Habits

ABSTRACT Aim The study assessed the incidence of dental caries in first permanent molars, evaluate and compare caries activity between upper and lower first permanent molar and evaluates the effect of various variables on the incidence. Materials and Methods Caries were detected using DIAGNOdent as a valuable adjunct to clinical examination. The visual appearance of the site recorded using the criteria proposed by Ekstrand et al. Results Out of total teeth examined, 50.17% were affected by dental caries and 49.90% teeth had no carious lesion. Out of affected teeth enamel caries consisted of 108 (20.69%) teeth, outer half dentin caries affected 101(19.35%) teeth and 53(10.15%) teeth showed dentin caries extended to inner half of teeth. Further significant associations were noted in between different variables. Conclusions An early preventive program at the age of 6-7 years reduced caries incidence in permanent molars.

scholarly journals Use of laser fluorescence in dental caries diagnosis: a fluorescence x biomolecular vibrational spectroscopic comparative study

2013 ◽  
Vol 24 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Fabíola Bastos de Carvalho ◽  
Artur Felipe Santos Barbosa ◽  
Fátima Antonia Aparecida Zanin ◽  
Aldo Brugnera Júnior ◽  
Landulfo Silveira Júnior ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Dental Caries ◽  
Organic Matrix ◽  
Significant Negative Correlation ◽  
Laser Fluorescence ◽  
Human Teeth ◽  
Enamel Caries ◽  
Dentin Caries ◽  
Significant Difference ◽  
Peak Value

The aim of this work was to verify the existence of correlation between Raman spectroscopy readings of phosphate apatite (∼960 cm−1), fluoridated apatite (∼575 cm−1) and organic matrix (∼1450 cm−1) levels and Diagnodent® readings at different stages of dental caries in extracted human teeth. The mean peak value of fluorescence in the carious area was recorded and teeth were divided in enamel caries, dentin caries and sound dental structure. After fluorescence readings, Raman spectroscopy was carried out on the same sites. The results showed significant difference (ANOVA, p<0.05) between the fluorescence readings for enamel (16.4 ± 2.3) and dentin (57.6 ± 23.7) on carious teeth. Raman peaks of enamel and dentin revealed that ∼575 and ∼960 cm−1 peaks were more intense in enamel caries. There was significant negative correlation (p<0.05) between the ∼575 and ∼960 cm−1 peaks and dentin caries. It may be concluded that the higher the fluorescence detected by Diagnodent the lower the peaks of phosphate apatite and fluoridated apatite. As the early diagnosis of caries is directly related to the identification of changes in the inorganic tooth components, Raman spectroscopy was more sensitive to variations of these components than Diagnodent.

scholarly journals Caries Diagnosis using a Laser Fluorescence System. Observation of Autofluorescence of Dental Caries.

2003 ◽  
Vol 22 (1) ◽  
pp. 56-65 ◽  
Author(s):  
Yoshimi SHIGETANI ◽  
Akira OKAMOTO ◽  
Neamat ABU-BAKR ◽  
Keita TANABE ◽  
Suginari KONDO ◽  
...  
Keyword(s):  
Dental Caries ◽  
Laser Fluorescence ◽  
Caries Diagnosis

scholarly journals Lasers in Diagnosis, Interception and Management of White Spot Lesions and Dental Caries - A Review

2021 ◽  
Vol 10 (9) ◽  
pp. 624-631
Author(s):  
Payal Sandeep Chaudhari ◽  
Manoj Ghanshyam Chandak ◽  
Kajol Naresh Relan ◽  
Pooja Ghanshyam Chandak ◽  
Chanchal Harikishor Rathi ◽  
...  
Keyword(s):  
Dental Caries ◽  
Carbon Dioxide Laser ◽  
Dental Anxiety ◽  
Acid Resistance ◽  
Laser Fluorescence ◽  
White Spot ◽  
White Spot Lesions ◽  
Rotating Speed ◽  
Increased Risk ◽  
Caries Removal

Despite huge developments in oral health, dental caries still remains a community health issue globally. Dental caries is prevalent worldwide amongst adults and school children; nearly 100 % of the population is affected in most of the countries. Caries harms the outer dental structures, eventually reaching the dental pulp, making the teeth undermined and ultimately compromising functional abilities. It is the major reason for loss of tooth. For the management of carious lesions, the tissues which are decayed should be removed and replaced by dental restorations. Increased potential for causing dental anxiety and uneasiness in many patients has been reported with the usage of routine caries removal systems such as diamond and tungsten carbide rotating burs. Moreover, with the use of high and low rotating speed drills, which is used for complete dentin removal, over excavation of caries (when the deeper dentin layers are involved) may happen eventually leading to increased risk of exposing and damaging the pulp irreversibly. These disadvantages have led to exploration of new alternatives such as stepwise, minimal or no dentinal caries removal procedures that illustrate clinical benefit over comprehensive caries removal in the treatment of dentinal caries. Laser technology has reformed the management of dental caries. Laser has been found to be the latest, most recent, conservative, less traumatic and minimally invasive caries removal procedure. The energy of laser is absorbed which is then transformed to heat, leading to microstructural and chemical alterations in the surface of enamel which is irradiated thereby improving enamel acid resistance. Laser also helps to maintain a dry surrounding that improves the dentist’s vision of the working field thereby resulting in an improved outcome. KEY WORDS Lasers, White Spot Lesions, Dental Caries, Laser Fluorescence, Orthodontic Therapy, Carbon-Dioxide Laser

Cell Wall Ultrastructure in Three Strains of a Cariogenic Streptococcus

1971 ◽  
Vol 29 ◽  
pp. 338-339
Author(s):  
M. J. Kramer ◽  
Alan L. Coykendall
Keyword(s):  
Cell Wall ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Genetic Heterogeneity ◽  
Morphological Characteristics ◽  
Electron Microscopic ◽  
Dna Reassociation ◽  
Wall Ultrastructure

During the almost 50 years since Streptococcus mutans was first suggested as a factor in the etiology of dental caries, a multitude of studies have confirmed the cariogenic potential of this organism. Streptococci have been isolated from human and animal caries on numerous occasions and, with few exceptions, they are not typable by the Lancefield technique but are relatively homogeneous in their biochemical reactions. An analysis of the guanine-cytosine (G-C) composition of the DNA from strains K-1-R, NCTC 10449, and FA-1 by one of us (ALC) revealed significant differences and DNA-DNA reassociation experiments indicated that genetic heterogeneity existed among the three strains. The present electron microscopic study had as its objective the elucidation of any distinguishing morphological characteristics which might further characterize the respective strains.

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