Abstract: A process for manufacturing customized facemasks, includes: producing respective impressions of patient's forehead and chin, to record an anatomic structure thereof, using impression materials commonly utilized in dentistry for intraoral impressions; producing respective 3D digital images of a patient's forehead and chin through a 3d-scanning of the forehead and chin impressions; 3D printing of customized forehead and chin pads; detecting patient's side profile line from a side picture of patient's face; 3D printing of a midline rod modelled according to said profile line; and assembling the forehead and chin pads and said midline rod into a facemask featuring a facial frame providing retention to elastic bands connectable to an intraoral appliance, in the forehead pad a temperature sensor is inserted while a pressure sensor is embedded into the chin pad.