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Osteoradionecrosis: an update
C Madrid1, M Abarca, K Bouferrache
1Service of Oral Surgery, Oral Medicine and Hospital Dentistry, Department of Ambulatory Care and Community Medicine, University of Lausanne, Rue du Bugnon 44, 1011 Lausanne, Switzerland. carlos.madrid@hospvd.ch
Oral Oncology
|May 12, 2010
Summary
Osteoradionecrosis (ORN) of the mandible, a severe side effect of head and neck cancer treatment, involves fibro-atrophic mechanisms. Prevention focuses on pre-radiation dental care, while new protocols address mild to moderate ORN stages.
Area of Science:
- Oncology
- Oral Surgery
- Radiation Oncology
Background:
- Osteoradionecrosis (ORN) of the mandible is a severe complication following head and neck cancer treatment.
- The pathogenesis is increasingly understood as a fibro-atrophic process involving inflammation and vascular damage.
Purpose of the Study:
- To review the pathogenesis, risk factors, and current management strategies for osteoradionecrosis of the mandible.
- To highlight emerging preventive and therapeutic approaches based on a deeper understanding of ORN pathophysiology.
Main Methods:
- Literature review of osteoradionecrosis pathogenesis and treatment.
- Analysis of risk factors including radiation, surgery, and lifestyle.
- Evaluation of preventive strategies and therapeutic interventions.
Main Results:
- A fibro-atrophic mechanism involving free radicals, endothelial dysfunction, and microvascular thrombosis is proposed for ORN.
- Key risk factors include post-radiation dental extractions, radiation dose, surgery, and substance abuse.
- Steroid use may offer a protective effect by inhibiting inflammation.
Conclusions:
- Preventive dental extractions before radiotherapy remain crucial for ORN prevention.
- New protocols are being developed for early-stage ORN, with free tissue transfer as the standard for advanced cases.
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