Symmetrical advancement of mandible
Disclosed are asymmetrical splints for a mandibular advancement device (MAD) for use with a patient having an asymmetrical dentition, wherein the asymmetry of the splint complements the asymmetry of the dentition such that when the MAD is used to advance the mandible, the mandible is advanced symmetrically. Also disclosed are methods of manufacture and use of the splints.
1. An asymmetrical splint for a mandibular advancement device (MAD) for use with a patient having an asymmetrical dentition, wherein the asymmetry of the asymmetrical splint complements the asymmetry of the dentition such that when the mandibular advancement device (MAD) is used to advance the mandible the mandible is advanced symmetrically, wherein the asymmetrical splint comprises an occlusal surface and fiducial markings scored into the occlusal surface, and wherein the fiducial markings compensate for the curvature of each side of each arch by being placed on the occlusal surface in a location mathematically calculated to account for a patient's asymmetrical dentition such that the fiducial markings mark an extent of a symmetrical advancement of the mandible by the mandibular advancement device (MAD) of the asymmetrical dentition, wherein asymmetrical advancement for each of a right and left side of the asymmetrical splint is determined by: tangent line=parallel line÷cos (tangent angle) where, the tangent line is tangential to splint curvature at a point, the point is selected on the asymmetrical splint to which an adjustment mechanism of the mandibular advancement device (MAD) is to be attached, the parallel line is parallel to anteroposterior (A/P) axis, and the tangent angle is between the tangent line and the parallel line.
2. The asymmetrical splint of claim 1 , further comprising fiducial markings on the splint indicating the extent of mandibular protrusion subsequent to an adjustment to the mandibular advancement device (MAD).
3. The asymmetrical splint of claim 2 , wherein the fiducial markings are calculated to indicate the extent of a symmetrical mandibular advancement in an anterior-posterior direction.
4. The asymmetrical splint of claim 1 , wherein the asymmetry in the dentition is due to asymmetry in the mandible, maxilla, or both.
5. The asymmetrical splint of claim 1 , wherein the asymmetry in the splint is mathematically calculated based on data obtained regarding the asymmetry of the dentition and Equation (1).
6. The asymmetrical splint of claim 1 , wherein the mandibular advancement device (MAD) is configured to advance the mandible symmetrically based on the asymmetry of the dentition by titrating based on the asymmetry of the asymmetrical splint complementing the asymmetry of the dentition.
7. The asymmetrical splint of claim 1 , wherein the placement of the fiducial markings is independent of a titration mechanism used with the mandibular advancement device (MAD).