Maxillary Sinus Floor and Alveolar Crest Alterations Following Extraction of Single Maxillary Molars: A Retrospective CBCT Analysis.

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.

Denosumab-associated osteonecrosis of the jaw--a case report.

Osteonecrosis of the jaw (ONJ) following bisphosphonate use is well documented. However, to our knowledge, there are few cases reported on ONJ related to the use of other pharmaceutical agents, such as denosumab--a monoclonal antibody that is prescribed for the treatment of osteoporosis and is used as an anti-cancer agent. Here we present the first case in the UK of a patient who has developed ONJ following treatment with denosumab. The purpose of this report is to highlight the potential effects of this monoclonal antibody on bone turnover and the subsequent results of osteonecrosis of the jaw. It is hoped that this will allow early recognition by medical and dental practitioners, and appropriate referral and treatment. Clinical Relevance: Readers should be aware of other causes of osteonecrosis of the jaw.