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ABC Contacts

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ABC Tooth Contacts – In the field of dentistry, ABC contacts is the term used to describe the contacts between opposing teeth in the posterior region of the jaw. Video about right tooth contacts.

Teeth do not merely make contact with each other. There are specific points of contact, known as ABC contacts. Contacts made between opposing teeth, known as antagonist contacts, are classified as A, B, and C contacts on the basis of specific positions.

A contacts refer to the contacts between the buccal cusps of the upper and lower jaw,

B contacts refer to the contacts between the palatal cusps of the upper jaw and the buccal cusps of the lower jaw,

And C contacts refer to the contacts between the palatal cusps of the upper jaw and the lingual cusps of the lower jaw.

Misalignment of these contacts can lead to toothache, tooth decay, periodontal damage, tooth migration, and facial pain. It is not easy to find the right contact position, to avoid faulty contacts. Sometimes dental crowns are fitted with an open contact between the crown and opposing tooth. For the patient, this may be difficult to notice immediately, whereas a faulty contact is often detected right away. However, lack of contact between teeth also has negative effects, with tooth migration being possible consequences. Therefore, tooth replacement should always ensure correct tooth-to-tooth contact. The easiest way to test this is to bite on a thin piece of paper. If you can pull the paper out of your mouth while your teeth are clenched, contact between opposing teeth is inadequate. Therefore dentists test the positioning of the dental prosthesis using a special type of color foil, also known as bite paper or articulating paper.

ABC Contacts