Canker sores, also known as aphthous ulcers, are small, painful lesions that develop on the soft tissues inside the mouth or at the base of the gums. These shallow, round, or oval ulcers typically appear white, gray, or yellow with a distinct red border. They can form on the tongue, inner cheeks, lips, or the roof of the mouth, causing discomfort that can interfere with eating and talking. Over half the population experiences canker sores at some point, with many individuals encountering them frequently.
Composition and Mechanism
Canker covers are adhesive patches designed to adhere to these mouth sores. They are typically made from edible ingredients such as carbomer homopolymer, polyvinyl pyrrolidone, xylitol, hydroxypropyl cellulose, silicon dioxide, and mineral salts like carnallite. Many formulations also include active ingredients like menthol for pain relief, and sometimes citrus oil or annatto.
The primary way canker covers function is by forming a physical barrier over the sore. This protective seal shields the ulcer from common irritants like food, drinks, and accidental contact, reducing discomfort and allowing the sore to heal without constant disturbance. Additionally, the patch delivers its active ingredients directly to the affected area, aiming to soothe pain and promote healing.
Assessing Effectiveness
Canker covers offer noticeable benefits for individuals with canker sores. Many users report significant pain reduction and a protective barrier that allows for more comfortable eating and speaking. This immediate relief from irritation helps manage the acute discomfort.
Clinical studies have explored the efficacy of these patches in accelerating healing. One study indicated that canker covers could reduce healing time to approximately 24 hours, a substantial improvement compared to 120 hours for some benzocaine-based products. Another investigation found that sores treated with a canker cover healed in about one day, whereas untreated sores took around 10 days to resolve, and those treated with a plain patch took five days. Pain levels were also significantly lower for canker cover users within 12 to 24 hours of application. Individual responses can vary depending on the sore’s size, location, and specific product.
Optimal Application and Considerations
Proper application of a canker cover is important for best results. Begin by gently drying the area around the canker sore, as this helps the patch adhere securely. Then, place the white, adhesive side of the tablet directly onto the sore and hold it in place with firm, gentle pressure for about 10 to 20 seconds.
The patch typically forms a clear, gel-like bandage within 30 minutes, creating a protective layer over the sore. These covers typically stay in place for 8 to 12 hours, though some products may last less. While minor discomfort might occur during the initial application, it usually subsides quickly as the patch begins to work. If removal is necessary, gently peel the tablet from the sides while washing with warm water.
When to Consult a Professional
While canker covers provide effective temporary relief and aid healing, professional medical advice is sometimes necessary. You should consult a doctor if a canker sore is unusually large, lasts longer than two to three weeks, or if new sores appear before older ones have healed.
A medical consultation is also recommended if canker sores extend to the lips, cause extreme difficulty with eating or drinking, or are accompanied by other symptoms such as fever, weight loss, stomach pain, or skin rashes. These signs could indicate an underlying condition that requires diagnosis and specific treatment beyond what canker covers can offer. Canker covers are not a substitute for professional medical care for more complex oral health issues.