A retrospective study of osteomyelitis and osteonecrosis of the jaws and its etiologic implication of bisphosphonate in Asians.

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The objective of this study were to find the annual case trend of inflammatory jawbone diseases and to investigate the impact of medication-related osteonecrosis of the jaws (MRONJ). A retrospective study of 372 patients diagnosed with inflammatory jawbone condition except for alveolar osteitis from 2007 to 2015 was initiated. History taking and investigation of etiologic factors MRONJ, osteoradionecrosis (ORN), odontogenic infection, foreign body, and trauma were investigated. A separate analysis showed the number of MRONJ cases in two age groups (under 70years; 70years and over) and serum C-terminal peptide (s-CTX) values that were found. The results showed that the number of MRONJ cases was significantly larger in the older age group (p<0.05). Regarding gender and sites of lesions, MRONJ was significantly frequent in the female and the mandible (p<0.05). The R 2 values for the regression analysis for MRONJ (R 2=0.9234) and odontogenic etiology (R 2=0.0427) signified linear increase in the number of MRONJ cases, whereas bone lesions due to traditional odontogenic etiology stayed stationary. The number of MRONJ has escalated, and most of the patients are elderly people. The current trend of inflammatory conditions of the jaw may have changed since the advent of MRONJ. Long-term bisphosphonate therapy became a major risk factor for the osteomyelitis and osteonecrosis of the jaws. Thorough medical history, taking would be essential and communication with prescribing physicians should be emphasized during the dental treatment planning.