Prolonged parasthesia of the anterior part of the tongue is caused by trauma to which nerve?

Prolonged paresthesia of the anterior part of the tongue is primarily associated with trauma to the lingual nerve. The lingual nerve is responsible for the sensory innervation of the anterior two-thirds of the tongue, providing the sensation of taste and touch. When this nerve is damaged, it can lead to altered sensations, such as tingling or numbness, which are recognized as paresthesia.

Considering the other options:

The incisive nerve is a branch of the inferior alveolar nerve that mainly provides sensory innervation to the anterior teeth; it doesn't affect the tongue directly. The inferior alveolar nerve primarily innervates the lower teeth and has less direct impact on the tongue’s sensation. The facial nerve mainly innervates muscles of facial expression and provides taste sensation to the anterior two-thirds of the tongue via its chorda tympani branch, but it does not contribute directly to sensory innervation like the lingual nerve does. Therefore, any trauma that impacts the lingual nerve specifically leads to symptoms localized to the anterior part of the tongue.