Calculate the Total Body Surface Area (TBSA) burned using the Rule of Nines for an adult with full-thickness burns to the face, neck, anterior torso, bilateral arms, and bilateral legs.

The patient has full-thickness burns to the face, neck, anterior torso, bilateral arms, and bilateral legs. The Rule of Nines assigns percentage values to different body parts:

• Head and Neck: $9\%$
• Each Arm: $9\%$
• Anterior Torso: $18\%$
• Each Leg: $18\%$

• Face and Neck: $9\%$
• Anterior Torso: $18\%$
• Bilateral Arms: $9\% \text{ (left arm)} + 9\% \text{ (right arm)} = 18\%$
• Bilateral Legs: $18\% \text{ (left leg)} + 18\% \text{ (right leg)} = 36\%$

The estimated Total Body Surface Area (TBSA) burned for this patient is \boxed{\text{81%}}.