Cortical Sinus Floor

Either of a pair of paranasal sinuses filling the bodies of the maxillary bones.

Cortical sinus floor.

Sinus floor augmentation using mixture of mineralized cortical bone and cancellous bone allografts. The medial floor of the maxillary sinus is immediately above the roots of the first and second upper molars. 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. Or more often spread to soft tissues causing cellulitis and a swollen face.

Extend into nearby bone causing osteomyelitis. It has an outer part and a deeper part known as the paracortex. 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. As the pressure builds up the abscess may perforate into the oral cavity the maxillary sinus or even the nasal cavity.

In perspective of miniscrew placement study shows that maxillary sinus floor is safer with average and hyperdivergent growth pattern than hypodivergent growth pattern. The cortical bone thickness was found more at sinus floor level and above it than below the sinus floor. Extensive dental cysts extended into the sinus away from the original epicenter fig. Radiographic and histomorphometric evaluation article pdf available in journal of dental.

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. The cortex of a lymph node is the outer portion of the node underneath the capsule and the subcapsular sinus. Mucosal edema caused by periapical infection may progress and occlude the entire maxillary sinus or advance further to involve other paranasal sinuses. When activated these may develop into what is called a germinal centre.

Due to the pneumatization of the maxillary sinus the sinus floor augmentation is often performed to implant placement in the maxillary posterior region. The distance between root apex and maxillary sinus floor was the greatest in maxillary first premolars and shortest in the mesio buccal. The maxillary sinuses are large and pyramidal shaped with average dimensions of 3 5 cm x 2 5 cm x 3 2 cm. 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 outer cortex consists of groups of mainly inactivated b cells called follicles.