PMID- 31226194 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Int J Periodontics Restorative Dent JT - International Journal of Periodontics & Restorative Dentistry IS - 1945-3388 (Electronic) IS - 0198-7569 (Print) IP - 4 VI - 39 PST - ppublish DP - 2019 PG - 545-551 LA - en TI - Maxillary Sinus Floor and Alveolar Crest Alterations Following Extraction of Single Maxillary Molars: A Retrospective CBCT Analysis LID - 10.11607/prd.3865 [doi] FAU - Hameed, Sabina AU - Hameed S FAU - Bakhshalian, Neema AU - Bakhshalian N FAU - Alwazan, Essa AU - Alwazan E FAU - Wallace, Stephen S. AU - Wallace S FAU - Zadeh, Homayoun H. AU - Zadeh H CN - AB - This retrospective study investigated the changes in the maxillary sinus floor and alveolar crest following extraction of maxillary molars. Pre- and postextraction cone beam computed tomography scans of 23 patients were analyzed. Paired-sample t tests compared pre- and postextraction measurements, and independent-sample t tests were utilized for intergroup comparisons. Pearson correlation was used to assess the association between the measured variables and the outcome measures. The mean alveolar bone height reduction was 3.42 ± 2.40 mm and the alveolar crest loss was 3.07 ± 2.53 mm. The maxillary sinus floor position shifted coronally by a mean of 0.47 ± 0.32 mm. Approximately 88% of postextraction changes in alveolar bone height were due to alveolar crest changes, compared to 12% due to changes in the sinus floor position. The results of this study challenge the commonly held concept of extensive postextraction maxillary sinus floor alterations leading to sinus pneumatization. AID - 854449