초록 ▼

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric appliances configured to receive the teeth in a cavity and increme

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric appliances configured to receive the teeth in a cavity and incrementally reposition individual teeth in a series of successive steps. This is accomplished by applying force to specific surfaces of the teeth through stiffness of the appliance. However, such stiffness creates limitations in ease of use, patient compliance, and overall cost in material, manufacturing labor and treatment time. To overcome these limitations, the present invention utilizes polymeric or other material appliances with portions differing in rigidity or stiffness. Alternatively, elastic moduluses may differ from one appliance to the next in a successive series to accomplish various treatment goals. Thus, the systems and methods of the present invention provide the design, production and use of such multiple stiffness positioning appliances in orthodontic treatment. Similarly, the devices of the present invention provide differing stiffness appliances which may be used independently for purposes other than repositioning, such as for retaining teeth in a desired position.

대표청구항 ▼

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric appliances configured to receive the teeth in a cavity and increme

The present invention provides improved devices, systems and methods for repositioning teeth from an initial tooth arrangement to a final tooth arrangement. Repositioning is accomplished with a system comprising a series of polymeric appliances configured to receive the teeth in a cavity and incrementally reposition individual teeth in a series of successive steps. This is accomplished by applying force to specific surfaces of the teeth through stiffness of the appliance. However, such stiffness creates limitations in ease of use, patient compliance, and overall cost in material, manufacturing labor and treatment time. To overcome these limitations, the present invention utilizes polymeric or other material appliances with portions differing in rigidity or stiffness. Alternatively, elastic moduluses may differ from one appliance to the next in a successive series to accomplish various treatment goals. Thus, the systems and methods of the present invention provide the design, production and use of such multiple stiffness positioning appliances in orthodontic treatment. Similarly, the devices of the present invention provide differing stiffness appliances which may be used independently for purposes other than repositioning, such as for retaining teeth in a desired position. icates with a first channel in the inner nozzle and for receiving a flow of a first material from the injection molding machine. The inner nozzle also has a second hole which communicates with a second channel in the inner nozzle for receiving a flow of a second material from the injection molding machine. The first channel communicates with an inner and an outer channel in the inner nozzle, whereby the first material flows from the first channel into both the inner channel and the outer channel. The first material that flows into the inner channel will flow out of the nozzle assembly to form a first layer of the injection molded article and the material that flows into the outer channel will flow out of the nozzle assembly to form a second layer of the injection molded article. ers (a, b, c, d) of teeth of the displacer part (1) and the numbers (w, x, y, z) of teeth of the eccentric internal gear (12, 13) fulfil the equation and this equation expresses a positive integer, where w denotes the number of teeth of a first sun wheel (14) arranged on the shaft (2), x denotes the number of teeth of a third inner tooth system (15) on the disc-like rotary valve (3), y denotes the number of teeth of a third outer tooth system (16) on the rotary valve (3) and z denotes the number of teeth of a fourth inner tooth system (17) on the adjacent housing (18). 8. Hydrostatic planetary rotation machine according to claim 7, characterized in that the positive integer is equal to 3. 9. Hydrostatic planetary rotation machine according to claim 2, characterized in that, with the numbers of teeth a=12, b=14, c=11, d=12 or a=13, b=15, c=12, d=13 of the displacer part (1), the numbers of teeth of the eccentric gear (12, 13) of the rotary valve (3) can assume the following values: for (x-w)=1: x=16 to 24; y=29 to 45 teeth for (x-w)=2: x=31 to 49; y=18 to 46 teeth.