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WHERE IS THE ROOT :question:, Aetiology, Most common, INCISION AND…
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Aetiology
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Debridement of a periapical lesion of posterior teeth that are in direct contact with the mandibular canal.
Incision at the alveolar ridge of an edentulous patient, whose mental foramen, due to bone resorption, is localized superficially
When a bur enters the mandibular canal, during sectioning
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Compression of the lingual nerve, due to excessive retraction of the tongue with a retractor
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chorda tympani is a facial nerve responsible for innervating the anterior 2/3 of the tongue with the special sense of taste (taste bud).
- it combines with the lingual nerve (a branch of the trigeminal nerve) but the main body of the nerve leaves to innervate the anterior 2/3 of the tongue.
- Hence injury to the facial nerve can cause numbness and loss of taste sensation because it controls the muscle and taste buds respectively. however, loss of tase can also occur if there is injury to lingual nerve because chorda tympani lies along it
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Aetiology
When the buccal or lingual cortical plate, as well as the root tip region of maxillary posterior teeth is eroded --> root may be displaced during luxation
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Should be planned along “Langer’s Lines” of the normal skin tension / creases so minimum scar formation will be seen.
Should be planned to prevent subsequent scar contraction or fibrosis , which will prevent normal functioning of oral soft tissues .
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Flow chart showing management of displaced lower third molar
Acts as conduit for chorda tympanii; branch of facial nerve that responsible for taste sensation on anterior 2/3 of the tongue