초록 ▼

An orthodontic appliance is provided which includes an upper tooth receiving trough and a lower tooth receiving trough which are hinged together at a posterior portion of the appliance. The hinge is constructed so that the appliance is self opening to cause the troughs to maintain contact with the t

An orthodontic appliance is provided which includes an upper tooth receiving trough and a lower tooth receiving trough which are hinged together at a posterior portion of the appliance. The hinge is constructed so that the appliance is self opening to cause the troughs to maintain contact with the teeth when the patient's mouth is open. The appliance is formed of a soft and sticky plastic material so that it will adhere closely to the patient's teeth. Surface features are provided on opposing surfaces of the troughs to prevent the troughs from sticking to one another when the appliance is closed. An interference area is provided at the hinges to prevent the hinges from completely closing to assist in self opening of the appliance.

대표청구항 ▼

An orthodontic appliance is provided which includes an upper tooth receiving trough and a lower tooth receiving trough which are hinged together at a posterior portion of the appliance. The hinge is constructed so that the appliance is self opening to cause the troughs to maintain contact with the t

An orthodontic appliance is provided which includes an upper tooth receiving trough and a lower tooth receiving trough which are hinged together at a posterior portion of the appliance. The hinge is constructed so that the appliance is self opening to cause the troughs to maintain contact with the teeth when the patient's mouth is open. The appliance is formed of a soft and sticky plastic material so that it will adhere closely to the patient's teeth. Surface features are provided on opposing surfaces of the troughs to prevent the troughs from sticking to one another when the appliance is closed. An interference area is provided at the hinges to prevent the hinges from completely closing to assist in self opening of the appliance. ressure adjusting chamber; a pressure reducing tank connected through a pressure reducing valve to said pressure adjusting chamber to rapidly reduce a pressure in said pressure adjusting chamber; an evacuation valve connected to said pressure adjusting chamber; a compressor connected to said pressure adjusting chamber; a valve controller for controlling operation of each of said valves; and an injection machine for injecting, into said forming mold, fluidized biodegradable resin placed in a heated and pressurized environment and having moisture trapped therein; said valve controller initiating actuation of said compressor before or at the time when injection of the biodegradable resin into said forming mold by said injection machine is started, carrying out termination of actuation of said compressor and opening of said evacuation valve in the course of the injection, and carrying out closing of said evacuation valve and opening of said pressure reducing valve after the injection. 8. An apparatus for producing a biodegradable resin foam, comprising: a pressure adjusting chamber constructed in a manner to be capable of being opened and closed hermetically; an air-permeable forming mold arranged in said pressure adjusting chamber; a pressure reducing tank connected through a pressure reducing valve to said pressure adjusting chamber to rapidly reduce a pressure in said pressure adjusting chamber; an evacuation valve connected to said pressure adjusting chamber; a pressurizing tank connected through a pressurizing valve to said pressure adjusting chamber; a valve controller for controlling operation of each of said valves; and an injection machine for injecting, into said forming mold, fluidized biodegradable resin placed in a heated and pressurized environment and having moisture trapped therein; said valve controller opening said pressurizing valve before or at the time when injection of the biodegradable resin into said forming mold by said injection machine is started, carrying out closing of said pressurizing valve and opening of said evacuation valve in the course of the injection, and carrying out closing of said evacuation valve and opening of said pressure reducing valve after the injection. 9. An apparatus for producing a biodegradable resin foam, comprising: a pressure adjusting chamber constructed in a manner to be capable of being opened and closed hermetically; an air-permeable forming mold arranged in said pressure adjusting chamber; a pressure reducing tank connected through a pressure reducing valve to said pressure adjusting chamber to rapidly reduce a pressure in said pressure adjusting chamber; an evacuation valve connected to said pressure adjusting chamber; a valve controller for controlling operation of each of said valves; and an injection machine for injecting, into said forming mold, fluidized biodegradable resin placed in a heated and pressurized environment and having moisture trapped therein; said valve controller opening said evacuation valve in the course of injection of the biodegradable resin into said forming mold by said injection machine and carrying out closing of said evacuation valve and opening of said pressure reducing valve after the injection. 10. An apparatus for producing a biodegradable resin foam, comprising: a pressure adjusting chamber constructed in a manner to be capable of being opened and closed hermetically; an air-permeable forming mold arranged in said pressure adjusting chamber; a pressure reducing tank connected through a pressure reducing valve to said pressure adjusting chamber to rapidly reduce a pressure in said pressure adjusting chamber; a pressurizing tank connected through a pressurizing valve to said pressure adjusting chamber; a valve controller for controlling operation of each of said valves; and an injection machine for injecting, into said forming mold, fluidized biodegradable resin placed in a heated and pressurized env