Relationship between depth of approximal caries lesions and presence of bacteria in the dentine in primary and permanent posterior teeth: a radiographic examination with microbiological evaluation

Objectives: To access the influence of the addition of a lead foil to intraoral digital radiographic receptors on image contrast and approximal caries lesions diagnosis. Methods: 40 posterior teeth were distributed in silicone phantoms composed of two premolars, two molars and a non-test canine. Radiographic images of the phantoms were obtained with and without the incorporation of a lead foil, using the Digora Optime and Digora Toto systems. Four observers scored the images for the presence of caries lesions, using a 5-point scale. Images of an aluminum step wedge were acquired with and without the incorporation of a lead foil. Gray values and standard deviation of gray values were calculated in different thickness of the step wedge and, then, contrast variation was calculated. Results: Presence of a lead foil did not influence caries lesions diagnostic values, regardless of the type of digital system (p > 0.05). In general, the objective analysis was not influenced by the presence of a lead foil in any of the tested systems (p > 0.05). However, Digora Toto images showed greater gray values, lower standard deviation of gray values and lower contrast variation, regardless of the presence of the lead foil (p < 0.05). Conclusions: The addition of a lead foil to intraoral digital receptors did not influence image contrast nor caries lesions diagnosis.

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Molar-incisor hypomineralization (MIH): report of a severe case

Revista de Odontologia da Universidade Cidade de São Paulo ◽

10.26843/ro_unicid.v28i1.233 ◽

2016 ◽

Vol 28 (1) ◽

pp. 58

Author(s):

Saygo Tomo ◽

Nagib Pezati Boer ◽

Jussara Barbosa Fortunato ◽

Adriana Sales Cunha Correia

Keyword(s):

Glass Ionomer Cement ◽

Severe Case ◽

Therapeutic Interventions ◽

Structural Defects ◽

Radiographic Examination ◽

Posterior Teeth ◽

Molar Incisor Hypomineralization ◽

Caries Lesions ◽

Ionomer Cement

The term molar-incisor hypomineralization describes an uncommon pathological entity characterized by the hypomineralization of permanent first molars and commonly affecting permanent incisors. In this paper we describe a case of a 9 years old female patient attended with severe dental sensibility, masticatory and phonetic difficulties. Clinical examination revealed severe enamel structural defects affecting all four permanent first molars and opaque stains affecting permanent incisors, besides caries lesions on posterior teeth and severe osseous basis discrepancy. Radiographic examination evidenced permanent first molars imbrication and shallow lesions on the enamel of these teeth. Therefore, molar-incisor hypomineralization was defined. After fluoride varnish applications, glass ionomer cement restorations and home performed fluoride mouthwash, patient continued to report dental sensibility. Molar-incisor hypomineralization is capable of led the affected patient through morbidity which results on quality of life decrease. Due to severe dentin exposure, therapeutic interventions aiming to reduce dental sensibility are not always effective.

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Influence of Smoking Habits on the Prevalence of Dental Caries: A Register-Based Cohort Study

European Journal of Dentistry ◽

10.1055/s-0041-1729458 ◽

2021 ◽

Author(s):

Miguel A. de Araújo Nobre ◽

Ana M. Sezinando ◽

Inês C. Fernandes ◽

Andreia C. Araújo

Keyword(s):

Dental Caries ◽

Proportional Hazards ◽

Smoking Habit ◽

Cox Proportional Hazards ◽

Radiographic Examination ◽

Rank Test ◽

Significance Level ◽

Cumulative Survival ◽

Caries Lesions

Abstract Objective The study aimed to evaluate the influence of smoking habit on the prevalence of dental caries lesions in a follow-up study. Materials and Methods A total of 3,675 patients (2,186 females and 1,489 males) with an average age of 51.4 years were included. Outcome measures were the incidence of dental caries defined as incipient noncavitated, microcavitated, or cavitated lesions which had been diagnosed through clinical observation with mouth mirror and probe examination evaluating change of texture, translucency, and color; radiographic examination through bitewing radiographs; or secondary caries through placement of a new restoration during the follow-up of the study. Statistical Analysis Cumulative survival (time elapsed with absence of dental caries) was estimated through the Kaplan–Meier product limit estimator with comparison of survival curves (log-rank test). A multivariable Cox proportional hazards regression model was used to evaluate the effect of smoking on the incidence of dental caries lesions when controlled to age, gender, systemic status, frequency of dental hygiene appointments, and socioeconomic status. The significance level was set at 5%. Results Eight hundred sixty-three patients developed caries (23.5% incidence rate). The cumulative survival estimation was 81.8% and 48% survival rate for nonsmokers and smokers, respectively (p < 0.001), with an average of 13.5 months between the healthy and diseased state diagnosis. Smokers registered a hazard ratio for dental caries lesions of 1.32 (p = 0.001) when controlled for the other variables of interest. Conclusion Within the limitations of this study, it was concluded that smoking habit might be a predictor for dental caries.

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Combined Near-Infrarred Light Transillumination and Direct Digital Radiography Increases Diagnostic In Approximal Caries

Scientific Reports ◽

10.1038/s41598-019-50850-5 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 4

Author(s):

Maria Melo ◽

Agustin Pascual ◽

Isabel Camps ◽

Fadi Ata-Ali ◽

Javier Ata-Ali

Keyword(s):

Digital Radiography ◽

Gold Standard ◽

Near Infrared ◽

Infrared Light ◽

Caries Detection ◽

Posterior Teeth ◽

Lesion Extension ◽

Diagnostic Capacity ◽

Approximal Caries ◽

Approximal Surface

Abstract The objective of this study was to evaluate the clinical ability of Near-Infrared Light-Transillumination (NILT) for approximal dentinal caries detection and to compare with direct digital-radiography (DDR), as well as to determine whether the combination of both techniques improves the diagnostic capacity of the lesions. From 88 patients (over 18 years), 138 posterior teeth (76 molars and 62 premolars), that had approximal caries reached into dentine determined by DDR, were included. Lesion extension and DDR images were scored as follows: D0 = sound surface, D1/D2 = caries restricted to the outer/inner-half of the enamel, and D3/4 = caries restricted to the outer/inner-half of the dentin. Opening of the approximal surface using 0.5 mm-in-diameter diamond-bar was used as gold-standard. The lesion extension was then determined by the following criteria: no dentinal caries (D0/1/2) or dentinal caries (D3/4). Seventy-one lesions were D3 and 67 lesions were D4. Sensitivities of overall/D3/D4 were 98.0/95.7/100.0 (NILT) and 100/100/100 (DDR), respectively. Correlations with gold-standard were 0.92 (NILT) and 0.42 (DDR), respectively. The correlation increased to 0.97 (p = 0.045) on combining NILT and DDR. There was no difference in sensitivity between the methods (p > 0.05); but was differences in the correlation (p < 0.01). It can be concluded that NILT showed sensitivity similar to that of DDR and higher correlation than DDR for approximal dentinal caries detection. Accordingly, it may be used to monitor the progression of caries without exposing the patient to ionizing radiation, this being of particular interest in growing patients and in pregnant women. In this respect, NILT can be an effective diagnostic tool adjunctive to bitewing radiographs in detecting approximal dentinal caries. The combination of NILT and DDR represents an increase in the diagnosis of approximal lesions The proposed diagnostic protocol comprises visual examination, followed by NILT and DDR only if the former technique detects approximal caries.

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