What Are These Bone Lumps in Your Mouth?
- songkhunmorjudfun
- May 30
- 3 min read
The bony overgrowths that protrude from the jawbone, known as Torus and Exostosis, are common findings. Many patients notice these bone lumps but are unsure of their origin, function, or potential impact on their daily life and dental treatments like orthodontics or denture fitting. This article clarifies the causes and relevance of these bone formations.
What are Torus and Exostosis?
Torus and Exostosis appear as hard, dense bone masses covered by a thin, taut layer of gum tissue. They are usually small and non-disease-related. Medically, they are a natural mechanism of the body, acting to reinforce the jawbone to withstand strong chewing forces. These bony growths are categorized based on their location:
1. Torus (Upper and Lower Jaw)
Torus typically develops in two specific locations along the midline or the inner side of the jaw:
1.1 Torus Palatinus (Mid-palatal Torus): A single mass with a broad base, found in the center of the hard palate.
1.2 Torus Mandibularis (Mandibular Torus): Often found in pairs on the inner side of the lower jaw (lingual side).
Tori Palatinus
Tori Mandibularis
2. Exostosis (Cheek and Lip Side of Gums)
1.1 Buccal Exostosis: Usually found on the alveolar ridge facing the cheek and lip, frequently presenting as multiple bumps in a linear arrangement.
Exostoses
What Causes These Bony Growths?
The formation of torus and exostosis is not related to disease, but rather a combination of factors:
1. Genetics (Heredity): If your family member has these bone lumps, others in the family have a higher chance of developing them.
Excessive Chewing Force: Habits like bruxism (teeth grinding) or clenching, which exert higher-than-normal stress on the jaw, stimulate bone thickening in high-stress areas for protection.
Growth Pattern: They often start forming in early adulthood and can gradually increase in size over a lifetime.
Do Torus and Exostosis Affect Dental Treatments?
Generally, torus and exostosis are harmless and rarely impede most dental procedures. However, they can influence specific treatments:
1. Impact on Orthodontics (Braces): While the large torus and exostosis do not obstruct tooth movement, the high bone density may slow down the tooth movement. If they are significantly large and interfere with the necessary placement of orthodontic appliances, surgical removal may be required before placing the appliance.
2. Impact on Certain Retainers: Wearing certain appliances, such as Hawley or wraparound retainers, can cause pressure on the bone lumps, leading to sore spots or discomfort.
3. Impact on Dentures: These growths can severely compromise the fit of a full removable denture. They cause friction, chronic pressure, and ulcerations, ultimately leading to poor retention and making the denture loose or unstable.
Before Tori Removal Surgery
After Tori Removal Surgery
Do Torus and Exostosis Need to Be Removed?
Removal is generally not necessary if they are asymptomatic and do not interfere with oral function. However, a dentist may recommend surgical removal if they obstruct the placement of removable dentures, retainers, or other essential dental appliances. Surgery may also be required if a torus or exostosis is large enough to impact speech, swallowing, or routine oral hygiene.
Torus and Exostosis are common natural bone formations and are generally harmless to your oral health. If you are concerned and planning for orthodontic treatment, consulting a specialized orthodontist is the most crucial step. They can accurately assess the impact of the bone lumps on your treatment plan and determine the best course of action.
If you are planning for orthodontic treatment or require dentures, knowing the status of your Torus or Exostosis is vital. Our clinic provides service from orthodontists certified by the American Board of Orthodontics (ABO), guaranteeing quality, expertise, and extensive experience to confidently care for your smile.
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Mittraphap Rd: 099 467 8789 or 094 262 8448
Klangmuang Rd: 099 171 7161 or 043 22227
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