The image of the hard palate/nasal fossa floor in panoramic radiography: the controversy is over.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
; 92(4): 464-9, 2001 Oct.
Article
en En
| MEDLINE
| ID: mdl-11598585
OBJECTIVE: The aim of this investigation was to obtain further information about the anatomic structures involved in the formation of the upper image of the hard palate/nasal fossa floor (HP/NFF). STUDY DESIGN: Three dry human skulls underwent ostectomies along the HP midline (ie, the area of the junction of the nasal septum with the nasal fossa floor) and along posterior portions of the HP/NFF (ie, the horizontal plates of the palatine bones and part of the palatine processes of the maxillae). The radiographs were digitized and preostectomy and postostectomy optical densities were measured. Preostectomy and postostectomy optical densities were also measured. RESULTS: Partial disappearance of the upper image occurred after ostectomy of the junction of the nasal septum with the NFF. Total disappearance occurred only after bilateral ostectomy of the posterior portions of the HP/NFF. The mean increases in regional optical density in terms of pixel gray level after the ostectomies were 70.44%, 72.27%, and 51.40%. CONCLUSIONS: The junction of the nasal septum with the NFF and the posterior portions of the HP/NFF form the upper image of the HP/NFF. Most of the image is real, although a small part is a ghost image of the horizontal plates of the palatine bones and of the posterior region of the palatine processes of the maxillae.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Radiografía Panorámica
/
Artefactos
/
Paladar Duro
/
Cavidad Nasal
Límite:
Humans
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
Año:
2001
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Estados Unidos