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Nuove acquisizioni sulla diagnostica per immagini dell’articolazione temporo-mandibolare
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Diagnostica per immagini nella patologia di confine otorinolaringoiatrica e odontostomatologica
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Proposta di un protocollo per lo studio con risonanza magnetica delle articolazioni temporo-mandibolari.
No full textDiagnostica per immagini nella patologia di confine otorinolaringoiatrica ed odontostomatologica
No full textAccuracy of cone-beam computed tomography in defining spatial relationships between third molar roots and inferior alveolar nerve
Full text linkObjective: Cone-beam computed tomography (CBCT) has been proposed in surgical planning of lower third molar extraction.
The aim of the present study was to assess the reliability of CBCT in defining third molar root morphology and its spatial
relationships with the inferior alveolar nerve (IAN). Materials and Methods: Intraoperative and radiographic variables of
74 lower third molars were retrospectively analyzed. Intraoperative variables included IAN exposure, number of roots, root
morphology of extracted third molars, and presence/absence of IAN impression on the root surface. Radiographic variables
included presence/absence of the cortex separating IAN from the third molar roots on CBCT examination, number of roots and
root morphology on both orthopantomography (OPG) and CBCT. The statistical association between variables was evaluated
using the Fisher’s exact test. Results: In all cases of intraoperative IAN exposure, the cortex appeared discontinuous on
CBCT images. All cases, in which the cortical bone was continuous on CBCT images, showed no association with nerve
exposure. In all cases in which nerve impression was identified on the root surface, the IAN cortex showed interruptions on
CBCT images. No nerve impression was identified in any of the cases, in which the cortex appeared continuous on CBCT
images. CBCT also highlighted accessory roots and apical anomalies/curvatures, not visible on the OPG. Conclusions: CBCT
seems to provide reliable and accurate information about the third molar root morphology and its relationship with the IAN
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