Indications:

• Skeletal open bite with excessive posterior vertical dimension.

• Posterior dentoalveolar over-eruption contributing to anterior open bite.

• Vertical maxillary excess cases requiring molar intrusion.

• Growing or adult patients as a pre-surgical or camouflage measure.

·         Multiple erupting teeth where eruption may interfere with proper seating and adaptation of the splint during treatment.

·         In situations where conventional clasp-based anchorage cannot be provided.

Contraindications:

• Poor periodontal support of posterior teeth.

• Poor oral hygiene (risk of plaque accumulation under splint).

• Non-compliant patients (removable variant if given).

• Severe skeletal open bite requiring orthognathic impaction of maxilla.

Corrects:

• Intrudes maxillary posterior teeth (molar/premolar region).

• Reduces lower anterior face height.

• Facilitates counter-clockwise mandibular autorotation → improves overbite.

• Corrects skeletal/dental anterior open bite.

Design:

• Full-coverage acrylic maxillary splint covering premolars and molars, extended palatally for rigidity.

• Fabricated with a defined path of insertion (parallel walls in posterior region) to ensure retentive and precise fit.

• Reinforced with wires/clasps or bands on first molars for anchorage.

• Splint may incorporate attachments/hooks for applying intrusive force (e.g., elastics or skeletal anchorage).

Philosophy:

• Distributes intrusive forces uniformly to posterior maxillary dentition.

• Controlled force application (~100–150 g per molar) via extraoral traction or skeletal anchorage.

• Intrusion of posterior teeth → counterclockwise autorotation of mandible → closure of anterior open bite.

Modifications:

• Can be combined with High-pull headgear or cervical-pull headgear with vertical elastics.

• Mini-implant assisted maxillary intrusion splint (MIAIS) for skeletal anchorage and more predictable molar intrusion.

• Posterior bite blocks incorporated for additional vertical control.

• Bonded version for non-compliant patients

Advantages:

·         Precise path of insertion → ensures stability, retention, and ease of placement/removal.

·         Effective anterior bite opening → intrudes maxillary posterior teeth, helping control vertical dimension.

·         Improves smile esthetics → useful in treating anterior open bite and gummy smile cases.

·         Distributes intrusive forces evenly across posterior teeth, reducing risk of tipping.

·         Custom-fit splint design → enhances patient comfort and compliance.

·         Facilitates skeletal anchorage integration (can be combined with miniscrews or TADs).

·         Durable and lightweight acrylic with metal reinforcement → long-term appliance stability.

MaxDent precision fabrication → ensures accurate adaptation and superior finishing, providing a defined path of insertion that permits unobstructed tooth eruption while minimizing the need for frequent adjustments or replacements.