International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064 Index Copernicus Value (2013): 6.14 | Impact Factor (2015): 6.391 Volume 5 Issue 4, April 2016 www.ijsr.net Licensed Under Creative Commons Attribution CC BY Radiographic Assessment of the Change in the Maxillarysinus Mucosa in Proximity to Periodontally Involved Teeth Tihomir Georgiev 1 , Krasimira Prodanova 2 , Georgi Papanchev 3 1, 3 Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, Medical University of Varna 2 Department of Stochastic&Optimization, Technical University of Sofia Abstract: The aim of the present study is to explore the correlation between maxillary sinus diseases and inflammatory processes in the maxillary teeth in patients eligible for implant rehabilitation with a preoperative examination using cone-beam computed tomography (CBCT).Materials and methods:282 CBCT images of the maxilla and 530 images of the maxillary sinus were analyzed. Only teeth with chronic periodontitis and with no other pathological process were recruited in the target group.The distance between the sinus floor and theperiodontal pocketdepth(PPD) and the thickness of theSchneiderian membranearound each tooth was recorded.Results: The mean thickness of the maxillary sinus mucosawas 7.74 mm, reaching its highest value at 26 mm (as seen in 2 patients with chronic periodontitis). The mean distance between the periodontal involvement and the maxillary sinus floor for the affected teeth was 5.53 mm. The distance varied between 0 mm and 13 mm.Conclusions: This retrospective study showed that the thickness of the sinus membrane is directly related to the inflammatory processes of periodontium of the teeth adjacent to the sinus. Keywords: maxillary sinus, mucosal thickening, periodontal bone loss 1. Introduction The inflammatory deseases of maxillary teeth may ascend to the maxillary sinus and subsequently induce various pathological responses.[1,2]Periodontitis is regarded as the second most common cause oftooth loss resulting from the loss of the tooth-supporting apparatus. [3] Datareported in previous studiessuggest that10-12% of maxillary sinusitis have an odontogenic origin. [4] The most common causes of odontogenic sinusitis are periapical and periodontal inflammatory processes leading to changes in the normal anatomy of the sinus membrane. [5]Other studies have shown a relationship between periodontitis and periapical lesions and MT [6,7], particularly occurringin cases where root apexes of distal maxillary teeth protrude into the maxillary sinus. [8] Cone-beam computed tomography has more advantages over conventional radiographic techniques for recognition of the relationship betweentooth pathologyand the maxillary sinus.[9,10] 2. Materials and Methods The images for the present study were acquired with a cone- beam computed tomographyscanner (PlanmecaProMax 3D Max), integrated with a computer hard drive and backup peripheral devices, software for reconstructing images (PlanmecaRomexis) and apatients registration program. Scanning parameters wereas follows: scanning time 9-40 sec., imagereconstruction time 2-55 sec. CBCT images were stored and read by PlanmecaRomexis Software, compatible with Windows XP, Windows 7 and Windows 8. A total of 435 images of the maxilla were reviewed,the inclusion criterion being those images which displayed present teeth under the maxillary sinuses, namely canines, premolars and molars. Following radiographic examination, the study excluded 153 images where patients had distal maxillary edentulism. The target group involved 282 CBCT images of 530 sinuses and 1202 teeth withpatients' age varing from 16 to 82 years. Out of those images, we selected the teeth that had lost their supporting apparatus, exhibiting no other pathology (Figure 1a and 1b). Measurements were taken of the distance between the pathological process and the maxillary sinus as well as the thickness of the Schneiderianmembraneabove these teeth (Figure2) Figure 1a and 1b.Teeth with periodontal bone loss and mucosal thickining of the maxillary sinus Paper ID: NOV162596 746