Abstract
The objective of this study was to measure the topographic thickness of the lateral wall of the maxillary sinus in selected Asian populations. Measurements were made on the lateral walls of maxillary sinuses recorded using CBCT in a convenient sample of patients attending an Asian teaching hospital. The points of measurement were the intersections between the axes along the apices of the canine, first premolar, and second premolar and along the mesiobuccal and distobuccal apices of the first and second molars and horizontal planes 10 mm, 20 mm, 30 mm and 40 mm beneath the orbital floor. The CBCT images of 109 patients were reviewed. The mean age of the patients was 33.0 (SD 14.8) years. Almost three quarters (71.8%) of the patients were male. The mean bone thickness decreased beginning at the 10-mm level and continuing to 40 mm below the orbital floor. Few canine regions showed encroachment of the maxillary sinus. The thickness of the buccal wall gradually increased from the canine region (where sinus encroachment of the canine region was present) to the first molar region, after which it decreased to the thickness observed at the canine region. The buccal wall of the maxillary sinus became thicker anteroposteriorly, except in the region of the second molar, and thinner superoinferiorly. These changes will affect the approach used to osteotomize the lateral sinus wall for oral surgery and for the sinus lift procedure.
Highlights
The maxillary sinus is an anatomical structure that is relevant to both medicine and dentistry
This study aimed to determine the thickness of the buccofacial wall maxillary sinuses recorded using cone beam computed tomography (CBCT) in a convenient sample of consecutive patients attending the Oral Radiology Unit between 2010 and 2015
All measuring reference points at the molars and premolars showed the presence of the buccofacial maxillary sinus wall and allowed for complete measurements, except in the case of 1 Indian patient for whom the points at the second premolar were missing
Summary
The maxillary sinus is an anatomical structure that is relevant to both medicine (otorhinolaryngology) and dentistry. Otorhinolaryngologists routinely gained access to the maxillary sinus via the Caldwell-Luc approach to treat sinusitis by performing maxillary antrostomy. With advances in endoscopic surgery, most otorhinolaryngologists prefer to gain access via the nose when performing functional endoscopic sinus surgery involving the removal of small amounts of bone or other material or the removal of infected tissue and/or polyps. Small cysts or tumors can be removed using this approach. Many other types of maxillary sinus surgery that are performed by oral and maxillofacial surgeons, such as the retrieval of retained root tips, the removal of odontogenic cysts and/or tumors, the reduction and fixation of a Le Fort or zygomatic complex bone fracture and
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