The Pterygoid MITO implant is Leader Medica’s high-performance anatomical solution engineered to rehabilitate severely atrophic posterior maxillae without sinus grafting. Placed through the maxillary tuberosity to engage the pyramidal process of the palatine bone and the pterygoid plates of the sphenoid bone at an inclination of 35°–45°, it secures robust posterior cortical anchorage, completely eliminating the need for maxillary sinus elevations.

1. Surgical Anatomy & Biomechanics of Pterygoid Anchorage

• Sinus Lift Elimination: By coursing posterior to the maxillary sinus cavity, it eliminates sinus membrane tears, graft consolidation waiting times (6–9 months), and chronic sinusitis complications.
• Posterior Cantilever Elimination: Locating the distal-most implant support at the second molar region eradicates long prosthetic cantilever arms, ensuring biomechanically balanced cross-arch splinting for immediate full-arch loading.
• Dense Cortical Pterygomaxillary Substrate: The pterygoid process of the sphenoid bone provides dense cortical anchorage that resists physiological resorption, routinely delivering 45–60 Ncm insertion torque.

2. 2.42 mm Internal Hex Connection & Multi-Unit Versatility

• Internal Hexagon Platform: Provides positive anti-rotational stability for 17° and 30° angulated Multi-Unit Abutments (MUA) to correct surgical insertion trajectory.
• Double-Lead Progressive Condensing Threads: Condenses soft tuberosity bone while self-tapping securely into the rigid pterygoid plates.

3. DAS® Bioactive Surface & Grade 4 Titanium

• Subtractive pure dual-acid etched titanium ( = 1.35,mu ext{m}$) decontaminated via cold Argon-Oxygen glow-discharge plasma.

4. Surgical Protocol

• Preoperative 3D CBCT planning to evaluate pterygomaxillary column orientation and length (typically 16–20 mm).
• Placement angle of 35°–45° relative to the occlusal plane with a 10°–15° palatal tilt.
• Engagement of the pterygoid cortical plates under tactile resistance with 45–60 Ncm insertion torque.