A micro-computed tomographic study of the isthmus in the root canal system of mandibular first molar / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 11-14, 2009.
Article
Dans Chinois
| WPRIM
| ID: wpr-346784
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the prevalence and configuration of the isthmuses in the apical 6 mm of the mesial and distal roots of Chinese mandibular first molar by means of micro-computed tomography.</p><p><b>METHODS</b>Thirty-six extracted human mandibular first molars were selected. Specimens were subject to micro-CT and a slice thickness of 30 microm was obtained in the apical 6 mm of the roots examined. The number of sections showing isthmuses at each apical level was recorded. Three-dimensional images of isthmuses of mandibular first molars were reconstructed and observed.</p><p><b>RESULTS</b>The mesial roots of human mandibular first molars had a high incidence of isthmus. The isthmus incidence was greatest 4-6 mm from the apex in human mandibular first molar, with prevalence figures of 49.5%-66.1% and 17.3%-17.8% in mesial and distal roots, respectively. The chi-square test indicated a significant difference in the distribution of isthmuses between the two roots (P < 0.01).</p><p><b>CONCLUSIONS</b>The mesial roots of human mandibular first molars have a high incidence of isthmus, which may have clinical implications especially when surgical endodontics is performed on the mesial roots of mandibular molars.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Traitement de canal radiculaire
/
Racine dentaire
/
Imagerie diagnostique
/
Imagerie tridimensionnelle
/
Cavité pulpaire de la dent
/
Microtomographie aux rayons X
/
Mandibule
/
Molaire
Type d'étude:
Etude diagnostique
Limites du sujet:
Adulte
/
Humains
langue:
Chinois
Texte intégral:
Chinese Journal of Stomatology
Année:
2009
Type:
Article
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