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Orthodontic systems with resilient appliancesRelated Patent Categories: Dentistry, Orthodontics, By Mouthpiece-type RetainerOrthodontic systems with resilient appliances description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070248926, Orthodontic systems with resilient appliances. Brief Patent Description - Full Patent Description - Patent Application Claims
RELATED APPLICATION DATA [0001] This application is a continuation of application Ser. No. 10/983,457, filed Nov. 8, 2004, (U.S. 2006/0099544-A1) now allowed. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates to orthodontic treatment systems wherein resilient appliances are used in sequence to move the patient's teeth to desired orientations in the dental arch. [0004] 2. Description of the Related Art [0005] Orthodontic treatment involves movement of malpositioned teeth to improved orientations. Orthodontic treatment can greatly enhance the aesthetic appearance of the patient's teeth, especially in regions near the front of the oral cavity. Orthodontic treatment can also improve the patient's occlusion so that the teeth function better with each other during mastication. [0006] One type of orthodontic treatment is carried out by the use of elastomeric positioning appliances, also known as repositioning trays or alignment trays. These appliances have overall, generally "U"-shaped configuration that generally matches the shape of the patient's dental arch, and a row of receptacles in the appliance receive respective teeth of the dental arch. Some patients favor elastomeric positioning appliances because they can be removed while eating. [0007] Elastomeric positioning appliances are often made by first taking an impression of the patient's dental arches and then making a plaster of Paris or "stone" model from the impression. Next, the teeth of the stone model representing the teeth to be moved during treatment are cut or sawn from remaining portions of the model and repositioned as desired, using a wax or other material to hold the repositioned teeth in place. A sheet of thermoplastic material is then placed over the model and heated such that the sheet is formed into the exact shape of the model with the repositioned teeth. Subsequently, edges of the sheet are trimmed as desired to form a tray. When the tray is set in place over the patient's dental arch, the elastic characteristics of the thermoplastic material tend to move the teeth toward the orientations as represented by the repositioned teeth of the model. [0008] A system of elastomeric positioning appliances available from Align Technology, Inc. of Santa Clara, Calif. involves a series of alignment trays that are used in sequence. The trays are custom-made for each patient, and each tray is constructed to move the teeth along an incremental portion of the treatment path. One possible method of making such positioning trays is somewhat similar to the method described above, except that a model is provided for each tray of the series and the teeth are repositioned on each model in accordance with the intended incremental positions of the patient's teeth along the desired treatment path. [0009] Another type of orthodontic treatment is carried out by the use of a series of tiny, slotted brackets, each of which is affixed to a respective tooth of the patient's dental arch. A resilient arch member such as a curved, elongated archwire is placed in the slot of each bracket. Ends of the archwire are often received in devices known as buccal tubes that are affixed to the patient's molar teeth. The archwire serves as a track to guide movement of the teeth to desired positions. SUMMARY OF THE INVENTION [0010] The present invention is directed to novel systems of orthodontic appliances that include a series of resilient appliances for use in sequence. Each appliance of the series is constructed to move the teeth toward desired positions and may optionally have a geometry identical to the geometry of other appliances of the system. However, at least one of the appliances is constructed to provide a greater amount of force per unit displacement of tooth movement on at least some of the teeth than other appliances of the series in order to more efficiently move the teeth to their final positions as the end of the treatment program is approached. [0011] In more detail, the present invention in one aspect is directed toward a system for moving teeth of a patient's dental arch from a first tooth arrangement to a second tooth arrangement. The system comprises a plurality of resilient trays each having a buccolabial wall section, an occlusal wall section and a lingual wall section. Each tray has a row of receptacles for receiving respective teeth of the dental arch of a dental patient, and each of the receptacles of each tray is arranged in a certain relative orientation with respect to the remaining receptacles of the same tray when the tray is relaxed. The relative orientation of the receptacles is substantially the same for each of the trays, and at least one of the trays has a stiffness that is greater than the stiffness of at least one other tray. At least one of the buccolabial, occlusal and lingual wall sections of at least one tray is not in contact with a majority of the buccolabial, occlusal and lingual sides respectively of the teeth of the dental patient when received on the dental arch of the patient. [0012] Another aspect of the present invention is also directed to a system for moving teeth of a patient's dental arch from a first tooth arrangement to a second tooth arrangement. This system comprises a plurality of resilient trays each having a buccolabial wall section, an occlusal wall section and a lingual wall section. Each tray has a row of receptacles for receiving respective teeth of a dental arch of a dental patient, and the row of receptacles of each tray extends substantially along an arch-shaped curve that is substantially the same for each of the trays when the trays are relaxed. At least one tray has a stiffness that is greater than the stiffness of at least one other tray, and at least one of the buccolabial, occlusal and lingual wall sections of at least one tray is not in contact with a majority of the buccolabial, occlusal and lingual sides respectively of the teeth of the dental patient when received on the dental arch of the patient. [0013] The present invention is also directed in another aspect toward a system for moving teeth of a patient's dental arch from an initial tooth arrangement at the beginning of treatment to a final tooth arrangement at the conclusion of treatment. The system comprises a plurality of resilient trays including an initial tray for receiving the initial tooth arrangement and a final tray for receiving the final tooth arrangement. Each tray has a row of receptacles with a buccolabial wall section and a lingual wall section for receiving respective teeth of the dental arch, and the relative orientation between the receptacles of the initial tray is substantially the same as the relative orientation between the receptacles of the final tray when the initial tray and the final tray are relaxed. At least one of the trays has a stiffness that is greater than the stiffness of at least one other tray. Additionally, at least some of the receptacles of the initial tray of the system includes an additional space adjacent at least one of its buccolabial and lingual wall sections, and the additional space lacks an orthodontic appliance when the initial tray is received on the dental arch. [0014] The present invention in another aspect is also directed toward a system for moving teeth of a patient's dental arch from an initial tooth arrangement at the beginning of treatment to a final tooth arrangement at the conclusion of treatment. The system comprises a plurality of resilient trays including an initial tray for receiving the initial tooth arrangement and a final tray for receiving the final tooth arrangement. Each tray has a row of receptacles with a buccolabial wall section and a lingual wall section for receiving respective teeth of a dental arch, and the row of receptacles of the initial tray and the row of receptacles of the final tray extend along substantially along the same arch-shaped curve when the initial and final trays are relaxed. The final tray has a stiffness that is greater than the stiffness of the initial tray. At least some of the receptacles of the initial tray of the system include an additional space adjacent at least one of its buccolabial and lingual wall sections, and the additional space lacks an orthodontic appliance when the initial tray is received on the dental arch. [0015] Optionally, all of the appliances (such as the trays) can be constructed using standardized or ideal arch forms. Moreover, the couplings of the appliances (such as the tooth receptacles of the trays) may have a configuration adapted to receive teeth within a selected range of sizes. Accordingly, the time and expense of designing and constructing custom-made appliances for each patient can be avoided. [0016] These and other features of the invention are described in more detail in the paragraphs that follow and are illustrated in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0017] FIG. 1 is an inverted perspective view of one resilient appliance of an orthodontic system according to one embodiment of the present invention; [0018] FIG. 2 is a side elevational view of the appliance and the dental arch shown in FIG. 1 illustrating the appliance in place over an exemplary dental arch of an orthodontic patient; [0019] FIG. 3 is a bottom view of the appliance and the dental arch illustrated in FIG. 2; [0020] FIG. 4 is a bottom view of an exemplary ideal dental archform, illustrating the location of an embrasure line; Continue reading about Orthodontic systems with resilient appliances... Full patent description for Orthodontic systems with resilient appliances Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Orthodontic systems with resilient appliances patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Orthodontic systems with resilient appliances or other areas of interest. ### Previous Patent Application: Apparatus and methods for treating root canals of teeth Next Patent Application: Self-adhesive compositions including a plurality of acidic compouns Industry Class: Dentistry ### FreshPatents.com Support Thank you for viewing the Orthodontic systems with resilient appliances patent info. IP-related news and info Results in 0.10646 seconds Other interesting Feshpatents.com categories: Software: Finance , AI , Databases , Development , Document , Navigation , Error 174 |
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