Day:	2008-06-27
Time:	11:00 - 12:10
Section:	Anatomy, Education
Room:	Section room

A-0132 A COMPUTED TOMOGRAPHIC EVALUATION OF MAXILLARY SINUS ANATOMY IN DIFFERENT STATES OF DENTITION Trikeriotis Dimitris (Dimitris Trikeriotis1, E. Paravalou1, P. Diamantopoulos2, D. Nikolaou3) 1 Iaso General Hospital 2 Medical School, University of Athens, Athens, Greece 3 “Kyanous Stavros” General Hospital Objectives: a) The evaluation of the angle between the buccal and palatal alveolar maxillary sinus walls and its relation to the width/height of the sinus, the height of the sinus floor (vertical height from the nasal floor) and the alveolar crest width/height and b) the frequency and location of maxillary sinus septa and their relation to this angle. Materials and Methods: CT datasets of the dental implants plannings of 104 patients(52 men and 52 women) were used as a study material. Maxillary sinuses were divided into dentulous, partially edentulous and edentulous category groups. The transverse and anteroposterior dimensions of the maxillary sinuses were measured and panoramic lines crossing the sinuses parallel to the median sagittal plane were added on axial CT. Then, measurements were bilaterally performed on the cross-sectional reformatted images at the defined positions of 20%, 40%, 60% and 80% of the sinus length. For the evaluation of maxillary sinus septa 3D reconstruction images were used as well. Results: In all states of dentition, gender and residual alveolar crest width/height were not related to the variation of the angle formed between the buccal and palatal alveolar maxillary sinus wall. This angle appeared sharper in the anterior and posterior and wider in the middle of the sinus. In all groups, higher angle values appeared at the 40% of the sinus length . Edentulous compared to dentulous group showed significantly sharper angle values at the 20%, 40% and 80% of the sinus length. Furthermore, in all states of dentition, maxillary sinus width was shown to have the closer relation to the angle variation. It was correlated positively to the angulation in the anterior sinus. 50.9% of the patients appeared with maxillary septa. If present, they contributed to sharper angulation of the anterior sinus in dentulous and partially edentulous maxillas. Conclusion: This study contributes to evidence, regarding the sinus dimensions in relation to the alveolus morphology and state of dentition. The results focus on specific anatomical areas of surgical interest. However, further studies are needed to confirm the above findings.