Abstract: An orthodontic appliance including a shell aligner having a portion accommodating movement of a patient's bracketed teeth between a first position and the second position as elicited by force from an orthodontic braces appliance worn by the patient, related systems and methods.

Abstract: A dental appliance includes an attachment mechanism suited to attach the appliance on the teeth of a patient's upper jaw. The appliance includes a constraining mechanism linked to the attachment mechanism, where the constraining mechanism is suited to limit the movement of a central zone of the tongue and allow the anterior and lateral edges of the patient's tongue to perform movements necessary for speech and swallowing.

Abstract: Orthodontic positioning devices, and related methods and systems, are disclosed for use with one or more orthodontic elastic members. The disclosed devices are configured to couple with an orthodontic elastic member so as to react a force from the elastic member into the appliance to, for example, generate traction forces on the patient's teeth to produce a desired occlusion. A positioning device includes a patient removable tooth positioning appliance having teeth receiving cavities shaped to receive and apply a resilient positioning force to a patient's teeth. The appliance includes a hook configured to interface with an orthodontic elastic member. The hook can be configured to be offset from a surface of a tooth when the appliance is coupled with the patient's teeth and no elastic member is coupled with the tooth. The hook can be curved so that the hook is more retentive on the aligner. The hook can be reinforced so that the reinforcement resists deformation when the elastic is in place.

Abstract: A plurality of occlusal blocks for a mandibular relocation may include a first occlusal block including a first engagement surface and a first side surface with a first undercut formed in the first side surface of the first occlusal block. A second occlusal block may include a second engagement surface to engage the first engagement surface and a second side surface with a second undercut formed in the second side surface of the second occlusal block.

Abstract: A removable dental appliance may include an appliance body at least partially surrounding a plurality of teeth and an interproximal reinforcement. The appliance body may include a first shell shaped to engage a first tooth and a second shell shaped to engage a second tooth. The interproximal reinforcement extends from a first gingival edge on a labial side of the appliance body along an interproximal region between the first tooth and the second tooth to a second gingival edge on a lingual side of the appliance body. The interproximal reinforcement is configured to engage at least one of a lingual surface or labial surface of the first tooth below a height of contour to enable the appliance body to cause movement of the first tooth toward a desired position.

Abstract: Methods for generating orthodontic models having bite adjustment structures may include generating orthodontic treatment plan comprising a plurality of stages by positioning a plurality of digital bite adjustment structures on a corresponding plurality of anterior digital teeth of a digital model of a jaw at a first stage of a treatment plan, adjusting the position of the plurality of digital bite adjustment structures on the corresponding plurality of anterior digital teeth of the digital model of the jaw at a second stage of the treatment plan according to changes to the digital model of the jaw between the first stage of the treatment plan and the second stage of the treatment plan, and providing the digital model of the jaw for fabrication of physical models corresponding to the jaw at the first and the second stages of the treatment plan for formation of appliances thereover.

Abstract: A method and a system for determining a tooth trajectory for a given tooth of a subject are provided. The method comprises: generating, by executing an optimization algorithm, based on a 3D model of the given tooth, a plurality of segments defining a tooth trajectory of the given tooth from its initial position to its target position. The executing comprises: determining, based on the stress values range, an initial force to be applied to the given tooth, the initial force causing a maximum displacement of the 3D model of the given tooth from the start position associated with the given segment towards the target position associated with the given tooth, thereby identifying an end position associated with the given segment. The method further comprises determining a respective force applied to at least one other 3D model by the maximum displacement of the 3D model of the given tooth.

Abstract: In some embodiments, apparatuses and methods are provided herein useful to orthodontic kits. In some embodiments, an orthodontic kit comprises a carrier, wherein the carrier is configured to house a plurality of orthodontic appliances, the plurality of orthodontic appliances, and a plurality of support structures, wherein the plurality of support structures includes groups of support structures, wherein each group of support structures connects one of the plurality of orthodontic appliances to the carrier, wherein the orthodontic kit is defined by a computer data file, wherein the computer data file includes data necessary to additively manufacture the orthodontic kit including the carrier, the plurality of orthodontic appliances, and the plurality of support structures.

Abstract: Method and system for establishing an initial position of a tooth, determining a target position of the tooth in a treatment plan, calculating a movement vector associated with the tooth movement from the initial position to the target position, determining a plurality of components corresponding to the movement vector, and determining a corresponding one or more positions of a respective one or more attachment devices relative to a surface plane of the tooth such that the one or more attachment devices engages with a dental appliance are provided.

Abstract: Devices for treating obstructive sleep apnea include appliances for securing to one or more teeth of a patient and connected to a lingual bridge configured to change shape and apply pressure to a patient's tongue, preventing backward movement of the tongue and blockage of the patient's airway. The lingual bridge is composed of a shape memory alloy to allow the bridge to change shape once deployed in a patient's oral cavity and exposed to increased temperature in the patient's mouth. Pulse generators and electrodes are included to electrically stimulate the nerves and muscles of the tongue to assist in keeping the tongue from moving backward in the mouth during sleep.

Abstract: A drill guide assembly used to guide a drill into the jawbone of a patient during dental surgery includes at least one through going guide bore for guiding the drill, at least one attachment for securing a part of the drill guide assembly to the jaw of the patient during surgery, wherein the drill guide assembly includes a first part including the at least one first through going guide bore, the at least one first attachment and at least a first reference area for referring the first part to a first anatomical feature of the patient, a second part including a second reference area for referring the second part to a second anatomical feature of the patient, and a guiding structure for guiding the first part and the second into a desired configuration.

Abstract: Polymeric shell appliances are provided in which the polymeric shell appliances are configured to provide one or more activation forces to facilitate tooth movement. In many embodiments, the activation forces are arranged to provide force in a direction opposite to an intended direction of tooth movement. The polymeric shell appliances may comprise one or more tooth receiving cavities, in which each of the plurality of tooth receiving cavities is shaped and arranged to provide a counter moment of each of the plurality of teeth.

Abstract: A lip advancer is presented for preventing proclining or tipping forward of the lower incisors that causes relapse and gingival recession in retention with forward intermaxillary elastic traction that extends diagonally from posterior bracket hooks in the lower arch anchored to hooks on upper anchorage appliances. In one embodiment, the lip advancer is comprised of an invisible clear liner type plastic retainer for use with a dental arch, and a bumper extending labially from the retainer for pressing against the patient's lip causing the lip muscles to react pushing back with an opposite force thus preventing the anterior teeth from flaring labially. In another embodiment, for use with a plurality of brackets and an archwire, the lip advancer comprises an auxiliary archwire extending from and in contact with the brackets, and a bumper formed on the auxiliary archwire for applying pressure labially to a corresponding lip.

Abstract: The invention relates to a method for producing a dental aid from a thermoplastic film or plate, wherein a digital three-dimensional working model is created in a computer-aided manner using a three-dimensional data set of at least one part of an upper jaw and/or lower jaw.

Abstract: Dental retainer devices are provided. The dental retainer devices can be customized based on patient specific dental anatomy and dental treatment plans. Methods of making the dental retainer devices are also provided. The methods can included additive manufacturing. Methods are also provided for customization of a dental retainer device based on the patient specific anatomy. The methods for customization can include providing a dentist with different options for anterior teeth coverage, posterior teeth coverage, and palatal configurations for the dental retainer devices.

Abstract: Method and system for establishing an initial position of a tooth, determining a target position of the tooth in a treatment plan, calculating a movement vector associated with the tooth movement from the initial position to the target position, determining a plurality of components corresponding to the movement vector, and determining a corresponding one or more positions of a respective one or more attachment devices relative to a surface plane of the tooth such that the one or more attachment devices engages with a dental appliance are provided.

Abstract: A method for treating orthodontitis (i.e., gingivitis caused by malpositioned teeth). The process includes evaluating improper morphologies of alveolar bone in the horizontal dimension (i.e., orthodontosis) caused by displaced root(s) of a tooth, uprighting the root of the malpositioned tooth utilizing an orthodontic bracket system thereby causing the alveolar bone to be restored, which in-turn alleviates the orthodontitis. An orthodontic bracket is provided for use with an arch wire to apply corrective forces to a tooth. The bracket includes a vertical member having a slot formed therein for receiving the arch wire and a wide base horizontal member connected to the vertical member. The vertical member is positioned gingivally with respect to the horizontal member. The horizontal member includes opposing first and second ends that extend away from the vertical member and define a pair of spaced-apart wire engaging points engageable with the arch wire during treatment.

Abstract: A series of appliances including a first shell and a second shell can be designed to incrementally implement a treatment plan. The first and second shells can have cavities designed to receive teeth of a jaw. A first number of bite adjustment structures can be formed of a same material as the first shell, extending therefrom and designed to interface with teeth of a second jaw. The first number of bite adjustment structures can have a first shape and location specific to a first stage of the treatment plan. A second number of bite adjustment structures can be formed of a same material as the second shell, extending therefrom and designed to interface with teeth of the second jaw. The second number of bite adjustment structures can have a second shape and location, different than the first shape and location, specific to a second stage of the treatment plan.

Abstract: An orthodontic appliance for orthodontic treatment of a posterior maxillary sector extending from a mesial anchor tooth to a molar tooth unilaterally on the same side of the maxilla is provided. The appliance features a molar component, a mesial anchor tooth attachment, a long rod, and a hook. The long rod is saddle-shaped in the occlusal-gingival plane, and may have a distal step-down portion. The rod may extend at a mesial end thereof from the mesial anchor tooth attachment towards the molar component in a mesiodistal direction, and the rod may also have a mesial step-up portion starting from the mesial anchor tooth or premolar attachment. The hook may be located on the rod, for attachment with a traction element for direct molar traction. Under force of the traction element the rod exerts force on the molar component for molar distillation.

Abstract: An orthodontic molar distalizer having a molar component, a mesial anchor tooth attachment, and an elongate member therebetween. The elongate member features a hook for receiving a traction member for imparting distalizing force. A spring biasing means is positioned between the hook and the molar tube for applying distalizing force on the molar component and reducing canine over eruption. A telescopic distalizer comprised of an inner tube, an outer tube, and a plunger can be adjusted to a patient's anatomy. An arched distalizer having a threaded bolt connection between the elongate member and the molar component is also provided.

Abstract: An unimpeded distalizing jig, comprising a pair of tooth bond pads, an intra dental arch telescoping assembly, comprising a rod-like insertion and a tubular shell, which constrains the rod-like insertion to move with respect to the tubular shell along an elongated axis, which may be a radial path; and a force generating structure configured to supply an off-axis distalizing force to the intra dental arch telescoping assembly, such that the distalizing force is provided to the posterior tooth substantially without applying an anteriorizing force on the anterior tooth. The force generating structure may be an elastic band fixed by a hook to the tubular shell on one side, and to a molar on an opposing dental arch on the other side.

Abstract: An aligner utilizes a magnetic interaction to reposition teeth. The aligner includes an inner layer sized and shaped to correspond to an exterior of a dental mold for an arrangement of teeth. The aligner includes an aligner magnet coupled to an exterior of the inner layer. The aligner includes an outer layer sized and shaped to correspond to an exterior of the inner layer and the aligner magnet. The inner layer is received within the outer layer and the aligner magnet is between the inner layer and the outer layer. The aligner magnet is positioned to magnetically interact with a magnetizable component attached to a select one of the teeth.

Abstract: A removable orthodontic assembly to be used in a user's mouth, including: a frame member configured to be removably positioned proximate a lingual portion of the user's teeth; a first connector member, wherein the first connector member comprises a first end extending proximate to a labial portion of the user's teeth and a second end engaging the frame member; and a labial bow configured to be removably positioned proximate to the labial portion of the user's teeth having a first end and a second end, wherein the labial bow is configured to removably engage the first connector member.

Abstract: The present invention relates to orthodontic positioning appliances that represent teeth in desired positions and related systems and methods. An appliance can include teeth receiving cavities shaped to receive and apply a resilient positioning force to a patient's teeth. An appliance can include an outer component having a surface representing teeth in desired positions. An outer component can be integral with an appliance. An outer component can be separate and configured to couple with an appliance main body.

Abstract: Orthodontic systems and related methods are disclosed for designing and providing improved or more effective tooth moving systems for eliciting a desired tooth movement and/or repositioning teeth into a desired arrangement. Methods and orthodontic systems include the generation of an overcorrection in the tooth-receiving cavities of an appliance worn in the dentition. The overcorrection may provide an improved and more accurately applied force or moment applied to a tooth. The overcorrected force or moment can move a tooth closer to a desired position than if not overcorrected as sufficient force can still applied to the tooth as it gets closer to the desired position. The overcorrected force or moment may also better target the root of the tooth where the biological response to tooth movement occurs. The overcorrection may be calculated in various ways as described herein.

Abstract: An orthodontic appliance comprising a shell shaped to receive a patient's teeth and to urge one or more teeth into a predetermined alignment and/or orientation, the shell including a jaw-biasing region which extends beyond the patient's internal gum line when the shell is worn over the patient's teeth, the jaw-biasing region being configured to apply a bias to the jaw to modify the shaping thereof. By modifying the shape of the jaw to accommodate the patient's repositioned teeth, the present orthodontic appliance may be able to reduce the likelihood and/or severity of orthodontic relapse, thereby achieving a more stable outcome for the patient.

Abstract: An orthodontic correction device includes a masticatory unit with a rigid body. The masticatory unit can be removably worn on a dental arch and does not deform when accommodating misaligned teeth. A recess is formed in the masticatory unit to accommodate a tooth of the dental arch which requires orthodontic correction. A guiding groove is formed on the occlusal surface of the masticatory unit. An elastic member is configured to stretch across the occlusal surface of the masticatory unit, retained in the guiding groove, and coupled with several connection parts affixed to the buccal surface and lingual surface of the tooth. Occlusal loading generated during mastication is transmitted to the teeth of the dental arch through the masticatory unit and activates the elastic member to move the tooth to its desired position. The orientation of the guiding groove determines the moving direction of the tooth.

Abstract: Systems, methods, and devices for improved orthodontic treatment of a patient's teeth are provided herein. In some aspects, a method for fabricating an orthodontic appliance for treating a patient's teeth is disclosed. The method may comprise determining a movement path to move a tooth from an initial arrangement towards a target arrangement; determining a force system to move the tooth along the movement path; determining a variable gable bend to produce the force system; determining a geometry for a tooth receiving cavity of the appliance based on the variable gable bend; and generating instructions for fabricating the appliance having a tooth receiving cavity formed according to the geometry for the tooth receiving cavity.

Abstract: In one aspect, an orthodontic appliance can include a shell having a plurality of cavities shaped to receive a patient's teeth. The shell can include an exterior layer and an interior layer having a stiffness less than a stiffness of the exterior layer. A discontinuity can be formed in the exterior layer.

Abstract: An orthodontic palatal expander may include a first shell configured to receive at least one tooth of a first posterior segment of a dental arch of a patient; a second shell configured to receive at least one tooth of a second posterior segment of the dental arch; and a split beam connected between the first shell and the second shell. The split beam may include a first beam comprising a relatively high modulus material, a second beam comprising the high modulus material, and a region between the first beam and the second beam.

Abstract: A method for fixating or stabilizing a subject's mandible and maxilla includes providing multiple bone fasteners, providing two arch bars, attaching a first grouping of the bone fasteners to the subject's mandible, then securing the first arch bar to the first grouping of bone fasteners, attaching a second grouping of the bone fasteners to the subject's maxilla, then securing the second arch bar to the second grouping of bone fasteners, and then fastening the first arch bar to the second arch bar.

Abstract: Systems, methods, and devices for producing appliances for expansion of the palate of a patient are provided. A palate expanding orthodontic appliance comprises a teeth engagement portion comprising a plurality of teeth engagement structures and a force generating portion coupled to the teeth engagement portion and configured to apply force to cause the patient's palate to expand. The orthodontic appliances can be designed according to the specifications provided herein and manufactured using direct fabrication methods.

Abstract: A sliding molar distalizer is provided. The distalizer features a canine attachment bracket, a molar tube, and a rod connected to the bracket and having an engagement end for engaging the molar tube. A hook formed on a portion of the rod receives an elastic for imparting distalization force directly on the distalizer towards the molar tube. An orthodontic tube formed on the attachment bracket holds an archwire that passes through premolar brackets. A buccal push flange lever is formed at a distal portion of the rod for imparting force on the molar tube.

Abstract: The invention relates to a device suitable for influencing the intake of food through the oral cavity of a human, comprising anchoring means which can be applied to one or several teeth of both the upper and the lower jaw, at least one elongated element that can be placed around the front of the upper or lower jaw and that can be coupled adjacent its two element ends to the anchoring means applied to the respective jaw, and connecting means that can be provided between the upper and the lower jaw and that can be coupled at one end to the elongated element and at the other end to the anchoring means applied to the other jaw, such that an opening of the jaws causes the connecting means to pull the elongated element against the front of the jaw, which results in an unpleasant or pain sensation.

Abstract: An orthodontic appliance has a ramp extending laterally from the posterior teeth on one of the patient's mandibular/maxillary dental arches. The ramp is curved with a J-shaped occlusal ramp surface extending diagonally upward toward its anterior aspect. The ramp also includes a stop at the gingival end of the ramp surface. A post extends laterally from the posterior teeth on the other dental arch. The post contacts and slides along the ramp surface toward the stop to guide the mandible forward as the mandible closes. The post seats against the stop to define a limit for closure of the mandible.

Abstract: An orthodontic bracket is provided including a hollow housing defining a cavity and having windows for accessing the cavity to allow an archwire to pass through the housing. One or more, and preferably at least two sets of rollers are provided within the hollow housing for reducing the friction on the archwire as it passes through the windows and the cavity of the housing. The orthodontic bracket preferably includes a first set of rollers located adjacent a first or entrance window and a second set of rollers located adjacent a second or exit window. Guide blocks are provided between the sets of rollers to prevent the archwire from kinking or binding within the housing. A mounting block or mesh pad is provided on a rear of the housing to attach the housing to a tooth and a cover is provided on a front of the housing to secure the sets of rollers within the housing. An external hook may be provided on the housing for attaching rubber bands or other tensioning devices to the orthodontic bracket.

Abstract: The present invention relates to a dental suction device for managing fluid in a patient's mouth during a dental procedure. The dental suction device comprises a pliable tube having a first end for connection to a vacuum source and a second end that can be looped to form a suction end for positioning in a patient's mouth. The loop is adjustably secured by a pair of retaining collars positioned a certain distance apart from each other along the second end of the tube and connected together by a tie. The loop, adjusted to accommodate the shape of the patient's mouth, is secured around the terminal end of a row of teeth in the patient's mouth. In this way, the dental suction device can be maintained and operated in the patient's mouth during a dental procedure.

Abstract: A dental orthotic strut having at least one multi-axis rotable joint connecting the strut to either a maxillary and/or mandibular retainer attached to the teeth. Jaw advancement may be accomplished by periodically replacing the strut with a new strut having a slightly longer minimum length, thereby advancing the resting position of the closed jaw. The rotable joint or joints allow greater freedom of movement and comfort when the jaw is opened in a non-sagittal plane. A plurality of strut pairs having a same length, but with progressively longer sets of strut pairs is generally supplied, so that left and right struts can be progressively replaced with longer struts over time.

Abstract: An orthodontic distractor includes two rods connected so as to be spread apart are brought together at either end. Also, a first coupling assembly is configured to couple the first rod to a bicuspid and a molar tooth of a patient and a second coupling assembly is configured to couple the second rod to a bicuspid and a molar tooth of a patient. Also, the first coupling assembly includes first extension arms attached to the first rod so as to permit adjustment of a vertical angle between said first rod and said first extension arms, and the second coupling assembly comprises second extension arms coupled to the second rod, so as to permit adjustment of a vertical angle between said first rod and said first extension arms.

Abstract: Systems, methods, devices and apparatus for mandibular advancement or retraction via bone anchoring devices are described herein. In various aspects, an apparatus for treating a patient via mandibular advancement or retraction comprises a plurality of anchoring devices positioned in the patient's intraoral cavity. Each of the plurality of anchoring devices can be positioned in bone of the patient's upper jaw or bone of the patient's lower jaw. One or more connecting structures can be removably coupled to and extend between the plurality of anchoring devices in order to displace the lower jaw anteriorly or posteriorly relative to the upper jaw.

Abstract: A medical apparatus including a bar with a first attachment loop, a second attachment and a plurality of hooks, wherein the medical apparatus is an arch bar.

Abstract: The present invention relates to an orthodontic bracket specifically designed for use with the deciduous teeth and method for its use. The bracket is unique in providing a debonding tab which reduces the potential for damage to the tooth due to the application of excessive force during the debonding process. The small size of the bracket allows it to fit available crown space on the deciduous teeth. Further the bracket is modified in shape to minimize mechanical forces applied to the deciduous teeth when engaged with an archwire. The bracket base is shaped to conform to the morphology of the deciduous tooth crown surface thereby providing an optimal adhesive interface with the deciduous tooth. The deciduous bracket provides adequate adhesion to avoid unwanted detachment of the bracket which often occurs when the use of permanent brackets is attempted on the deciduous teeth.

Abstract: The invention relates to an orthodontic device which is particularly economical and as small as possible, and which has hooks and a small tube, produced from a sheet metal plate using stamping and bending techniques and without the use of welding or soldering. The orthodontic device comprises a base plate having a flat region with a gingival and an occlusal edge. An occlusal rolling forms the small tube. The gingival edge has a counter-directional rolling. Concave cuts are formed in the side edges in order to form wing-shaped hooks. Both rollings can hold an applicator/protector, with which the orthodontic device is protected during adhesion, and can then be applied to a tooth in the correct orientation.

Abstract: A tooth-positioning appliance for closing spaces has at least two appliance segments, each segment having a thin elastomeric shell with recesses for removably engaging a set of teeth, and tooth-clasping elements for removably engaging bonded attachments protruding from the teeth. One of the appliance segments includes a flat receptacle extending horizontally on the thin shell of the appliance segment, and the other appliance segment has a thin elongated tab extending laterally from the second appliance segment spanning the space to be closed, and in sliding engagement with the flat receptacle of the other appliance segment. An activating element is connected between the appliance segments to exert a force to change the size of the space between the sets of teeth as the tab slides with respect to the flat receptacle.

Abstract: A mandibular fixation device overcomes the low operability of the conventional mandibular fixation device. The mandibular fixation device includes a sleeve, a first screw rod, a second screw rod and two positioning members. The sleeve includes two ends respectively provided with first and second screw holes. The first and second screw holes have opposite spiral directions. The first screw rod has a first threaded portion and a first assembly portion. The first threaded portion is threadedly engaged with the first screw hole, and the first assembly portion is located outside of the sleeve. The second screw rod has a second threaded portion and a second assembly portion. The second threaded portion is threadedly engaged with the second screw hole, and the second assembly portion is located outside of the sleeve. The two positioning members are coupled with the first and second assembly portions, respectively.

Abstract: An orthodontic apparatus for installation in a patient's mouth is disclosed. The orthodontic apparatus includes a first extension wire, a second extension wire, and a palatal archwire. Each of the first and second extension wires includes a proximal portion and a distal portion. The proximal and distal portions and the palatal archwire are manipulatable to apply corrective buccal, labial, and transverse forces on the patient's dento-alveolar complex (DAC), to correct the shape of the patient's palate.

Abstract: The present invention provides methods and systems including orthodontic tooth positioning appliances. An exemplary appliance can include teeth receiving cavities shaped such that, when worn by a patient, repositioning the patient's teeth from a first arrangement toward a subsequent or target arrangement. Appliances can include a cavity having one or more shaped features or protrusions shaped and/or positioned so as to apply a desired force to a patient's tooth received in the cavity and move the tooth along a desired path or direction.

Abstract: Methods, systems, and apparatus's for improving orthodontic treatments. In an embodiment, an orthodontic tracking template is provided for assisting in determining whether a patient's teeth are in an appropriate tooth arrangement for transitioning between a wire and bracket orthodontic treatment to a patient-removable orthodontic appliance treatment. The tracking template may include a shell portion defining a plurality of tooth-receiving cavities arranged to fit over at least a portion of the patient's teeth in an intermediate tooth arrangement without applying a tooth-moving force to the teeth or to any brackets attached to the teeth.

Abstract: In one aspect, the present invention is directed to an orthodontic bracket, comprising: a vertical bore; a bendable drop-in hook threaded into the vertical bore; and an annular magnetic object, in which the drop-in hook is threaded into. In another aspect, the present invention is directed to an orthodontic braces arrangement, comprising: at least two distant brackets, each installed on a different jaw of a user; and each of the distant brackets having at least one annular magnetic object secured thereto by a bendable drop-in hook; wherein a distance between magnetic objects of one bracket and another bracket is less than 2 mm; thereby providing intermaxillary attraction or propulsion force, depending on a polarity orientation of the magnetic objects.

Abstract: An orthodontic correction appliance may be directly connected to upper and lower removable orthodontic aligners to treat a Class II malocclusion. In some examples, the correction appliance has two elongated sections that are slidably connected to each other and allowed to move back and forth relative to each other. The ends of the two elongated sections can be attached to connectors extending from the removable aligners. In addition, the correction appliance can carry a biasing member that is connected to each of the two elongated sections of the appliance. The biasing member may bias the ends of the two elongated sections away from each other, providing a force to treat the Class II malocclusion while the patient is wearing the upper and lower removable orthodontic aligners.