en Medical Pathology Medical Pathology پژوهشي Research <span style="font-size:9pt"><span minion="" pro="" style="font-family:"><b>Introduction</b>: Odontogenic infections are one of the common causes of maxillary sinusitis. The aim of this study was to evaluate the increase in maxillary sinus thickness and its relationship with odontogenic factors in panoramic images.</span></span><br> <span style="font-size:9pt"><span minion="" pro="" style="font-family:"><b>Materials & Methods</b><b><span style="font-size:11.0pt"><span new="" roman="" style="font-family:" times="">: </span></span></b>This retrospective cross-sectional study examined 1246 sinuses. The images recorded odontogenic factors such as periapical lesions, dental caries, root canal treatment, periodontal lesions, and implants. Their relationship with the increase in the thickness of maxillary sinus mucosa was evaluated. The data was analyzed with SPSS16 statistical software and chi-square, as well as the significance level (P < 0.05).<span lang="FA" dir="RTL" style="font-family:"Times New Roman","serif""></span></span></span><br> <span style="font-size:9pt"><span minion="" pro="" style="font-family:"><b>Results</b><b><span style="font-size:11.0pt"><span new="" roman="" style="font-family:" times="">: &nbsp;</span></span></b>Among the examined panoramic images, 468 showed an increase in the thickness of the sinus mucous membrane. There was a significant relationship between dental caries, periapical lesions, root canal treatment, and periodontal diseases with an increase in the thickness of the sinus mucosa (P = 0.001). There was no significant relationship between the presence of the implant and the increase in maxillary sinus mucosa thickness (P=0.057).</span></span><br> <span style="font-size:9pt"><span minion="" pro="" style="font-family:"><b>Conclusion</b><b><span style="font-size:11.0pt"><span new="" roman="" style="font-family:" times="">: &nbsp;</span></span></b>The results of this study significantly correlate the increased thickness of the maxillary sinus mucosa with odontogenic and inflammatory lesions.</span></span> Maxillary Sinus, Panoramic Images, Odontogenic, Periapical 10 16 http://jbrms.medilam.ac.ir/browse.php?a_code=A-10-310-15&slc_lang=en&sid=1 Fariba Abdal dr.faribaabdal@yahoo.com 10031947532846008272 10031947532846008272 Yes Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ilam University of Medical Sciences, Ilam, Iran Masumeh Mohammadzadeh 10031947532846008273 0000000299199392 No Undergraduate student, Faculty of Dentistry, Ilam University of Medical Sciences, Ilam, Iran Fahime Feili 10031947532846008274 10031947532846008274 No Department of Restorative Dentistry, School of Dentistry, Ilam University of Medical Sciences, Ilam, Iran Atefeh Sheikhi 10031947532846008275 10031947532846008275 No Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ilam University of Medical Sciences, Ilam, Iran Negin Neshanifard 10031947532846008276 10031947532846008276 No Department of Oral and Maxillofacial Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran