Interaction effect of tegmen tympani and superior semicircular canal statuses on the thickness of the roof of the glenoid fossa: a cross-sectional descriptive study.

Purpose: Homogeneous development of temporal bone structures is explained by their ontogenic origin; tegmen tympani (TT) and superior semicircular canal (SSC) are related with the glenoid fossa at the temporomandibular joint (TMJ). Therefore, our objective was to determine a possible relationship between TT status (dehiscence or integrity) and the roof of the glenoid fossa (RGF) thickness; SSC status has also been considered.

Methods: This cross-sectional descriptive study was conducted in two tertiary hospitals on 95 patients (109 ears) presenting hypoacusia, facial palsy, vertigo, tinnitus, and other single or combined symptoms, and submitted to a thin-section multidetector-row computed axial tomography (CT) scan.

Influence of Sex and Age on Posterior Semicircular Canal Thickness.

Objective: The aim of this study is to determine whether sex and age influence posterior semicircular canal (PSC) thickness.

Methods: This observational study was conducted in 3 tertiary hospitals. The minimal distance between the PSC and the posterior cranial fossa (PSC thickness) was estimated by thin-section multidetector row computed axial tomography (CAT) scan of the temporal bones.

Ontogenetic explanation for tegmen tympani dehiscence and superior semicircular canal dehiscence association.

Objectives: To analyze the ontogeny of the superior semicircular canal and tegmen tympani and determine if there are common embryological factors explaining both associated dehiscence.

Methods: We analyzed 77 human embryological series aged between 6 weeks and newborn. Preparations were serially cut and stained with Masson's trichrome technique.

Association Between Tegmen Tympani Status and Superior Semicircular Canal Pattern.

Objective: Detecting and quantifying the possible association between tegmen tympani (TT) status and superior semicircular canal (SSC) pattern.

Design: Observational study.

Setting: Study conducted in three tertiary Spanish hospitals.

[Peculiarities in the development of the superior semicircular canal].

Objective: Our objective was to study the ontogeny of the superior semicircular canal in order to describe its peculiarities.

Methods: We analyzed 76 series of human embryos aged between 32 days (6mm) and newborns. The samples were cut serially and stained using Martin's trichrome technique.

Radiological patterns of the posterior semicircular canal.

Objectives: The identification and definition of the radiological patterns of the posterior semicircular canal (PSC), with a view to obtain readily applicable conclusions.

Design: The parietal morphology of the PSC has been studied by multi-slice helical computed tomography (Philips Brilliance 6). We have determined the distribution of the different types of bone cover of the PSC, taking some previously notified, standardised measurements of normality as reference.

Congenital dehiscence in the posterior semicircular canal.

Hypothesis: Posterior semicircular canal dehiscence (PSCD) may be of congenital origin.

Background: PSCD is characterized by the lack of bone coverage, which results in its lumen being exposed to the meninges of the posterior cranial fossa or to the gulf of the jugular vein. It has an incidence of 0.

Effect of semicircular canal dehiscence on contralateral canal bone thickness.

Objectives: Our objective was to determine if the existence of dehiscence in the superior or posterior semicircular canal was associated with the thinning of the bone roof in the rest of the vertical canals (superior or posterior).

Methods: The thickness of the superior and posterior semicircular canals contralateral to a dehiscence was studied using computerized tomography and compared statistically.

Results: When a superior semicircular canal had a dehiscence, the contralateral canal showed a significant mean decrease in its thickness of 0.

Radiological patterns of the bony roof of the superior semicircular canal.

Objectives: To study the radiological patterns of the bony roof of the superior semicircular canal with a view for obtaining readily applicable conclusions.

Design: 84 patients (163 petrous bones) have been studied by Multi-slice Helical Computed tomography (Philips Brilliance 6). We have determined the distribution of the different types of bone cover of the superior semicircular canal, taking some previously notified, standardised measurements of normality as reference.

Influence of aging and menopause in the origin of the superior semicircular canal dehiscence.

Objective: Determine if aging and menopause, known to be associated with bone resortion, also are associated with superior semicircular canal dehiscence.

Design: Observational study.

Setting: Study conducted in 3 tertiary Spanish hospitals.

Granular cell tumor: report of 8 intraoral cases.

Granular cell tumor (GCT) is an uncommon neoplasm of controversial origin that can appear in any corporal localization, including the orofacial region. Although aggressive and malignant variants of this neoplasm have been described, most of GCTs are benign. In spite of the amount of research, the etiology of this neoplasm remains unclear and its histogenesis and its possible muscular, connective or neural origin has been broadly debated.