The typical erosive lesion of patients with oral lichen planus
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Oral lichen planus (OLP) is a chronic inflammatory disease that affects the mucus membrane of the oral cavity. Oral lichen planus may appear as white, lacy patches; red, swollen tissues; or open sores. These lesions may cause burning, pain or other discomfort.

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Polydactyly is a condition where someone is born with one or more extra fingers or toes. It can occur on one or both hands or feet.

The name comes from the Greek poly (many) and dactylos (finger). The extra fingers or toes are described as “supernumerary,” which means “more than the normal number.” For this reason, the condition is sometimes called supernumerary digit.

A range of treatments is available depending on the type of polydactyly, and the cause is often genetic.
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The three classes according to
Angle's classification are as follows:
-Normal occlusion: The mesiobuccal cusp of the upper first molar occludes with the buccal groove of the lower first molar.
-Class I malocclusion: Same as normal occlusion but characterized by crowding, rotations, and other positional irregularities.
-Class Il malocclusion: The mesiobuccal cusp of the upper first molar occludes anterior to the buccal groove of the lower first molar.
There are two subtypes
of Class Il malocclusion.
Class II, division 1: Upper incisors are tilted outwards, creating significant overjet.
Class II, division 2: Upper incisors are labially inclined
Class Ill malocclusion: The mesiobuccal cusp of the upper first molar occludes posterior to the buccal groove of the lower first molar.

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