Cortical Sinus Floor

Mucosal edema caused by periapical infection may progress and occlude the entire maxillary sinus or advance further to involve other paranasal sinuses.

Cortical sinus floor.

A six month postoperative cbct image shows resolution of the mucositis and reestablishment of the sinus cortical floor d. To perform a within subject comparison of the cortical bone micro architecture of the maxillary sinus floor msf to that of the buccal aspect of the anterior and posterior maxilla. Micro ct scans of the buccal aspect of the anterior and posterior maxilla and of the msf in 14 human anatomical specimens were recorded. The maxillary sinuses are large and pyramidal shaped with average dimensions of 3 5 cm x 2 5 cm x 3 2 cm.

As the pressure builds up the abscess may perforate into the oral cavity the maxillary sinus or even the nasal cavity. The distance between root apex and maxillary sinus floor was the greatest in maxillary first premolars and shortest in the mesio buccal. Sinus obstructions cannot be determined with periapical radiographs but are easily seen on large field sinus cbct imaging figures 3a through 3f. Radicular cysts generally associated with the root apex of a carious or fractured tooth and residual cysts caused an upward displacement of the floor of the sinus but the cortical outline remained intact.

Maxillary sinus floor and buccal and palatal cortices were evaluated according to sex and age and the mean values were compared by one way analysis of variance and mann whitney u test. The cortical bone thickness was found more at sinus floor level and above it than below the sinus floor. An area of pus and fluid accumulation forms in the bone surrounding the apex of the tooth. The medial floor of the maxillary sinus is immediately above the roots of the first and second upper molars.

Sinus floor augmentation using mixture of mineralized cortical bone and cancellous bone allografts. When activated these may develop into what is called a germinal centre. It has an outer part and a deeper part known as the paracortex. Radiographic and histomorphometric evaluation article pdf available in journal of dental.

In perspective of miniscrew placement study shows that maxillary sinus floor is safer with average and hyperdivergent growth pattern than hypodivergent growth pattern. Extensive dental cysts extended into the sinus away from the original epicenter fig. The outer cortex consists of groups of mainly inactivated b cells called follicles. The aim was to perform radiographic and histomorphometric evaluation after placement of mixed allografts cortical freeze dried bone allograft fdba 50 cancellous fdba 50 during sinus floor augmentation.

Either of a pair of paranasal sinuses filling the bodies of the maxillary bones. Or more often spread to soft tissues causing cellulitis and a swollen face.