Location of maxillary intraosseous vascular anastomosis based on the tooth position and height of the residual alveolar bone: computed tomographic analysis
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Purpose: The aims of this study were to measure the distance of the intraosseous vascularanastomosis in the anterolateral wall of the maxillary sinus from different reference points,and to correlate the location of the intraosseous vascular anastomosis with the tooth positionand the residual bone height of the maxilla. Methods: Computed tomography (CT) images were taken from 283 patients undergoingdental implants placement in the posterior maxilla. Three horizontal lines were drawn atthe ridge crest, maxillary sinus floor, and the position of the anastomosis. A vertical secondline at the center of each tooth was drawn perpendicular to the horizontal lines. The distancefrom the ridge crest to the maxillary sinus floor and the distance from the maxillarysinus floor to the bony canal were measured from the intersections of the horizontal andvertical lines. The residual alveolar bone height was used to categorize three groups: group1,<4 mm; group 2, between 4 and 8 mm; and group 3, >8 mm. Results: The residual bone height values of different tooth positions were significantly different(P=0.0002). The distance from the maxillary sinus floor to the intraosseous vascularanastomosis was significantly different between groups 1 and 3 (P=0.0039). At the molarsites, a moderate negative correlation was found between the residual bone height and thedistance from the maxillary sinus floor to the intraosseous anastomosis. The distances ofthe alveolar ridge crest and the maxillary sinus from the intraosseous vascular anastomosiswere not significantly different between sexes. Conclusions: Within the limitations of this study, sites with a higher residual bone heightin the molar regions were at a relatively high risk of artery damage during window osteotomypreparation; therefore, we recommend taking more precautions when using a lateralapproach for sinus elevation.
Abstract
Purpose: The aims of this study were to measure the distance of the intraosseous vascularanastomosis in the anterolateral wall of the maxillary sinus from different reference points,and to correlate the location of the intraosseous vascular anastomosis with the tooth positionand the residual bone height of the maxilla. Methods: Computed tomography (CT) images were taken from 283 patients undergoingdental implants placement in the posterior maxilla. Three horizontal lines were drawn atthe ridge crest, maxillary sinus floor, and the position of the anastomosis. A vertical secondline at the center of each tooth was drawn perpendicular to the horizontal lines. The distancefrom the ridge crest to the maxillary sinus floor and the distance from the maxillarysinus floor to the bony canal were measured from the intersections of the horizontal andvertical lines. The residual alveolar bone height was used to categorize three groups: group1,<4 mm; group 2, between 4 and 8 mm; and group 3, >8 mm. Results: The residual bone height values of different tooth positions were significantly different(P=0.0002). The distance from the maxillary sinus floor to the intraosseous vascularanastomosis was significantly different between groups 1 and 3 (P=0.0039). At the molarsites, a moderate negative correlation was found between the residual bone height and thedistance from the maxillary sinus floor to the intraosseous anastomosis. The distances ofthe alveolar ridge crest and the maxillary sinus from the intraosseous vascular anastomosiswere not significantly different between sexes. Conclusions: Within the limitations of this study, sites with a higher residual bone heightin the molar regions were at a relatively high risk of artery damage during window osteotomypreparation; therefore, we recommend taking more precautions when using a lateralapproach for sinus elevation.
참고문헌 (24)
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