Evaluation of caries-affected dentin with optical coherence tomography
Braz. oral res
;
25(5): 407-413, Sept.-Oct. 2011. ilus, tab
Article
Dans Anglais
| LILACS
| ID: lil-601879
ABSTRACT
The purpose of this study was to evaluate the degree of demineralization of artificially induced caries-affected human dentin by an in vitro microbiological method. The occlusal surfaces of 6 human molar teeth were abraded until a flat surface was obtained, and the enamel was removed to expose the occlusal dentin surface. These teeth were sectioned in 12 halves in the vestibular-lingual direction and divided into 3 groups according to the period length of the microbiological essay (n = 4) G1, 7 days; G2, 14 days; and G3, 21 days. The surfaces of all specimens were protected by an acid-resistant nail varnish, except for a window where the caries lesion was induced by a Streptoccocus mutans biofilm in a batch-culture model supplemented with 5 percent sucrose. The specimens were then analyzed by optical coherence tomography (OCT) with a super-luminescent light diode (Λ = 930 nm) with 6.0-µm lateral and longitudinal resolution (in the air). Qualitative and quantitative results (images and average dentin demineralization, respectively) were obtained. The mean demineralization depths were (µm) 235 ± 31.4, 279 ± 14, and 271 ± 8.3 in groups 1, 2, and 3, respectively. In addition, no significant change was observed in the lesion mean depth from 7 days of cariogenic challenge on. In conclusion, OCT was shown to be an efficient and non-invasive method to detect the depths of lesions caused by demineralization. Further, a seven-day demineralization time was considered sufficient for caries-affected dentin to be obtained.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Techniques in vitro
/
Caries dentaires
/
Tests d'évaluation de l'activité carieuse
/
Dentine
/
Tomographie par cohérence optique
Type d'étude:
Étude pronostique
/
Recherche qualitative
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
Braz. oral res
Thème du journal:
Dentisterie
Année:
2011
Type:
Article
/
descriptif de projet
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Nuclear and Energy Research Institute/BR
/
University of São Paulo/BR
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