[Cone Beam computerized tomography and implants]. / Imagerie Cone Beam et implants.

The authors, both working as radiologist in private practice, have initiated the Cone Beam technique as soon as 1999 and report their own experience. Cone Beam Computerized Tomography (CBCT) is dedicated to hard tissues imaging thus specifically adapted to oral implantology and maxillofacial surgery. It has the advantage to deliver low dose radiation, compared to other techniques. CBCT permits anatomical volume acquisition. After data analysis on computer, distances and implants 3D simulation can be checked. CBCT differs from CT scan because it is more adapted to hard tissues, it has a better resolution than CT, and because it delivers lower doses. Its isotropic pixel particularity which gives exact linear measurements, and the fact that metallic artifacts are significatively diminished, gives CBCT its high interest in implantology. These advantages of CBCT and the small place needed for its installation explain its global wide spreading. CBCT is now considered to be the gold standard in dental and maxillofacial sectional imaging. Because of its biomeasuring capacity, its bi- and tridimensional reconstruction possibilities, its surgical navigation and simulation capacity, it is now widely used in implantology.

[Diagnostic means using oral and maxillofacial cone beam computed tomography: results]. / Moyens diagnostiques en imagerie odonto-stomatologique cone beam: résultats.

Every imaging test is justified by clinical facts and optimized to reduce the X-rays dose delivered to patients. If results from orthopantomogram are inadequate, a cross-sectional tomographic technique is indicated. Today, cone beam computed tomography yields images comparable to CT scan or even better. Some dedicated cone beam machines allow the study of small volumes with a very high definition. Dental and maxillofacial imaging as a whole, including endodontic imaging, formerly dreaded by imagers, is now accessible to cross-sectional imaging.

[Stafne's lacuna, a salivary inclusion in the mandible. Apropos of a case]. / La lacune de Stafne, inclusion salivaire dans la mandibule. A propos d'une observation.

Clinically asymptomatic, a radiolucent area in the body of the mandible was discovered on the panoramic radiograph, during a routine examination. The first diagnosis was cyst, but sialogram and CT showed a bone defect on the lingual mandibular wall, with an accessory salivary lobe into the bone cavity, corresponding to a Stafne's idiopathic bone cavity.

[Pedicled osteoma of the maxillary sinus. A rare radiological finding?]. / L'osteome pédicule du sinus maxillaire. Une constatation radiologique rare?

Several cases of intrasinus bony densities above pathological dental areas are reported. Common radiological features are outlined (pediculate implantation on the sinusal floor, cortical limits, acute or chronic dental infection). In one case, an histological examination performed at the opportunity of a sinusal operation pointed out osteomatous tissues.