Patent ID: 11903868
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 20:
21. The appliance of claim 20 wherein the upper assembly upper transition portion has an anteriorly facing upper transition surface defining a retrusion prevention angle such that a lower anterior edge of the sloped upper transition surface is forward of an upper posterior edge of the sloped transition surface; and the lower transition portion has a posteriorly facing lower transition surface defining a retrusion prevention angle such that a lower anterior edge of the sloped lower transition surface is forward of an upper posterior edge of the sloped lower transition surface;
wherein when the patient wears the appliance, due to the upper and lower retrusion prevention angles relative to an occlusal plane, the upper and lower assemblies engage along the upper and lower transition portions to prevent retrusion of the mandible relative to the maxilla to thereby maintain the jaw in a treatment position when jaw muscles of the patient are relaxed.