Fig. 4From: Optimal sites for orthodontic anchor screw placement using panoramic images: risk of maxillary sinus perforation and contact with adjacent tooth roots during screw placementComparison of buccolingual bone thickness and inter-radicular distance between the three sinus morphology types at 5, 6.5, and 8 mm from the alveolar crest between the maxillary second premolar and first molarBack to article page