Upper lateral incisors

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Always put an attachment (optimized support attachment, multiplane or extrusion attachment) Trays should fit perfectly (use chewies) Sequence movements (first rotation or tip, last extrusion or intrusion) Use auxiliary techniques if the aligner "lag" (bootstrap) Widen peg-shaped incisors before treatment.
Clinical implications

Overcorrections

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 It is a good strategy related to overcorrections of some isolated movements, such as rotations or intrusions, is to ask that the movement is done normally during the aligner sequence, but the overcorrection to be done alone, at the end of the sequence. This way, if…

Aligner Biomechanics

Tooth movements.

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Tooth Movements. Teeth can de-rotate, extrude, intrude, procline, torque, bodily move, etc at a rate of 0.2 mm of linear movement or 2 degrees per aligner approximately 2 weeks at a time.  The predictability to achieve the desired outcome will depend on how well each tooth responds to the forces programmed within each aligner. Some movements will be more…

Aligner Basics

Retention

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In a comparative study of the retention of fixed braces versus Invisalign retainers, Kuncio et al (2007) found that, in many cases, aligner treatment can relapse more than fixed braces, so patients are instructed to continue to wear their retainers for maintenance treatment. Combination fixed…

Retention after aligner orthodontics

Treatment monitoring

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Check the fit of the current aligners Check for any loss of tracking Assess oral hygiene Run the finest diamond strip through the contacts and ensure the strip can pass through passively and no teeth are 'stuck' (5-5). Some contact may require slight relief to...
Clinical implications

Anterior tooth rotation

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Rotated anterior tooth: Clincheck instruction requesting Hinge Axis rotations: “Please correct anterior rotations with hinge-type movements. Create an axis for rotation (hinge) on the mesial or distal of the tooth. It is OK to move the hinge buccal to create spacing but perform ALL the…

Aligner Biomechanics

Preferences

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Here are the first 6 items in the Global clinical preference page. I have addedsome comments. Special instructions: Instructions: 1.Please correct anterior rotations with hinge type movement. Create an axis for rotation (hinge) on the mesial or distal of the tooth. It is OK to…

Preferences

Upper lateral incisor

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Attachment recommended for rotated lateral incisor: Attachments design for rotation mesial in: Horizontal rectangular attachment 4 mm long, 1.5 mm height, 1.25 mm thick on the incisal margin tapering into the crown on the gingivalmargin, and rotate the whole attachment 45 degrees so it goes…

Aligner Biomechanics