Bony Exsostosis
Exostosis is the formation of new bone on the surface of a bone. It can cause chronic pain ranging from mild to debilitatingly severe, depending on where they are located and what shape they are.
· Torus palatinus
· Mandibular tori
· Maxillary tori
· Buccal exostosis
* Torus palatinus :
- Palatal tori are usually present on the midline of the hard palate.- Most palatal tori are less than 2 cm in diameter, but their size can change throughout life.
- The prevalence of palatal tori ranges from 9% - 60%
- More common than bony growths occurring on the mandible, known as torus mandibularis.
- Common in female .
* Mandibular tori :
- Bony growth in the mandible along the surface nearest to the tongue .- Usually present near the premolars and above the location of the mylohyoid muscle 's attachment to the mandible.
- In 90% of cases, there is a torus on both the left and right sides, making this finding an overwhelmingly bilateral condition.
- The prevalence of mandibular tori ranges from 5% - 40% and are less common than bony growths occurring on the palate
- More common in male .
* Buccal exostosis :
- Formation of an exostosis (bone mass) on the outer, -facing side of the maxilla just above the teeth or the cheek-facing side of the mandble.- Formation on the low jaw occurs much less commonly than on the upper jaw . They are painless, but may contribute to periodontal disease if they become too large. They can be removed with surgery. Buccal exostoses have no malignant potential.
