What Researchers Did
Researchers combined the results of 29 studies to compare five different treatments given around the time of tooth extraction in patients who had previously received head and neck radiation, to see which best prevented a bone complication called osteoradionecrosis.
What They Found
This meta-analysis of 29 studies covering 1,520 patients found that osteoradionecrosis occurred in 4.6% of patients given hyperbaric oxygen, 3.4% given pentoxifylline-tocopherol, and 3.8% given antibiotics, compared with 17.6% of patients who received no preventive treatment, with non-overlapping confidence intervals between the control group and each treatment group. In studies that directly compared treatments, hyperbaric oxygen showed lower odds of osteoradionecrosis than no treatment (odds ratio 0.27) and than antibiotics alone (odds ratio 0.57), but neither difference reached statistical significance. Antibiotics were used in 17 of the studies, most often penicillin or clindamycin, though preoperative and postoperative protocols varied significantly between studies. A statistical test (Egger's test) found no evidence of publication bias in the hyperbaric oxygen or antibiotic groups (p greater than 0.05).
What This Means for Canadian Patients
For patients in Canada facing high-risk tooth extractions after head and neck radiation, this analysis suggests hyperbaric oxygen, pentoxifylline-tocopherol, and antibiotics were each associated with lower osteoradionecrosis rates than no preventive treatment. The abstract notes that antibiotics may be the more practical option for many patients given their lower cost and easier access compared to hyperbaric oxygen. Since hyperbaric oxygen did not show a statistically significant advantage over antibiotics when directly compared, patients should discuss the available options with their dental and medical team.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
Most of the included studies were retrospective and observational rather than randomized, 11 of the 25 observational studies carried a serious risk of bias, and antibiotic protocols varied widely between studies, so these pooled comparisons should be interpreted with caution.