Maxillofacial Prosthetics: Obturators and Facial Guide

Maxillofacial prosthetics builds artificial replacements for missing parts of the face and jaws — after cancer surgery, trauma or birth defects. An obturator closes an opening between the mouth and the nose or sinus (for example after part of the upper jaw is removed); facial prostheses replace external parts such as an ear, nose or eye.

Without separation between mouth and nose, food escapes into the nose and speech becomes unintelligible; without a facial prosthesis, many patients avoid public life. A well-made prosthesis restores eating, speaking and the confidence to face the world.

Key Concepts

• Obturator types: surgical (placed during the operation), interim (worn while healing) and definitive (the long-term prosthesis, usually made 3–6 months after surgery).
• Hollow bulb: the part extending into the defect is made hollow to reduce weight on the remaining teeth and tissues.
• Retention: remaining teeth with clasps, dental implants, skin adhesives, eyeglass frames, or small craniofacial implants (≈ 3–4 mm) placed around the defect.
• Facial prosthesis types: auricular (ear), nasal (nose), orbital (eye region) — sculpted in wax, then processed in medical-grade silicone colour-matched to the skin.
• Materials: heat-cured acrylic for obturators (rigid, durable); RTV silicone for facial prostheses (flexible, lifelike).

How It Works

For an obturator, an impression of the defect and remaining teeth is recorded, the prosthesis is designed with clasps on the remaining teeth and a bulb shaped to the defect, and after a wax try-in checks speech and comfort it is processed in acrylic, hollowed, polished and delivered. Adjustments continue as healing reshapes the tissues.

A facial prosthesis starts with an impression of the area and wax sculpting matched to photographs and the opposite side of the face. At try-in, shape, position and skin colour are refined; the wax is converted to silicone with intrinsic and extrinsic colouring, and the patient learns to place, remove and clean it.

Worked Example

Why the obturator bulb is hollowed. Suppose a bulb is roughly box-shaped: 4 cm × 3 cm × 2.5 cm. Volume = 4 × 3 × 2.5 = 30 cm³. Solid acrylic (density ≈ 1.2 g/cm³) would weigh 30 × 1.2 = 36 g hanging from the remaining teeth. Hollowing removes roughly 60 percent of the material, leaving 40 percent: 36 × 0.40 = 14.4 g, about 14 g. Cutting the weight by more than half is often the difference between a prosthesis worn all day and one left in a drawer.

Common Misconceptions

• An obturator is only cosmetic. Its main jobs are functional: sealing the mouth from the nose for swallowing and intelligible speech.
• One prosthesis lasts forever. Tissues remodel after surgery and silicone degrades, so facial prostheses typically need remaking every 1–2 years and obturators need periodic relining.
• A facial prosthesis is plastic surgery. It is non-surgical and removable — sculpted silicone worn over the defect, not an operation.

Real-World Applications

• After maxillectomy for oral cancer — the most common reason an obturator is made.
• Cleft palate cases where surgery alone leaves an opening affecting speech.
• Post-trauma or burn defects of the nose or ear, restored with silicone prostheses.

Maxillofacial prosthetics is part engineering, part art: the obturator gives back eating and speaking, the facial prosthesis gives back the face the world sees — a reminder that dentistry's reach extends well beyond teeth.