Quantitative Sensory Testing of the Lower Lip After Inferior Alveolar Nerve Block, and Evaluation of the Role of the Contra-lateral Inferior Alveolar Nerve

The purpose of this study is to determine the contribution of the innervation of the contra-lateral mandibular nerve for the innervation of the lower lip area.

The investigators hypothesis is that the sensation of the lower lip is contributed by both mandibular nerves (from both sides of the jaw).

Inclusion Criteria:

• Healthy subjects with no systemic diseases, chronic medication, past nerve injury, or sensory complaint.

Exclusion Criteria:

• Hypersensitivity/allergy to local anesthetic materials
• Systemic diseases, Chronic medication
• Past nerve injury
• Congenital or acquired deformity in the lower jaw
• Past fractures/neoplasm of the lower jaw
• Past surgery to the lower lip