Orthodontic aligners treatment: Designing Problems

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  Design 1 1. Segmentation Problems : The treatment plan exhibited significant segmentation issues. 2. Alignment & Leveling Woes : There were noticeable problems with the alignment and leveling of the upper anterior teeth. This was particularly evident in both the occlusal and submento-vertex views, indicating a need for better planning and execution. 3. Inadequate Arch Shape : The arch shape deviated from the ideal U-shape, which could negatively impact the patient's bite and overall function. This aspect requires immediate attention to ensure proper occlusion. 4. Attachment Issues : The positioning and thickness of attachments were inadequate, particularly on the upper left canine, where the doctor specifically requested no attachment placement. This could lead to ineffective tooth movement and discomfort for the patient. 5. Class III Elastic Mismanagement : The use of Class III elastics on the left side for over three months was a significant oversight. This prolonged applic...
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Thermoformed vs 3D Printed Aligners

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Jindal et al. 2019 presented a successfully 3D printed 0.75 mm thick clear aligner using
Dental Long Term (LT) clear resin and compared its mechanical and geometrical properties to a conventionally manufactured thermoformed Duran clear dental aligners. 

Dental Long Term (LT) clear resin and compared its mechanical and geometrical properties to a conventionally manufactured thermoformed Duran clear dental aligners. 

It was suggested that 3D printed resin-cured clear dental aligners are more suitable because
they have better geometric accuracy and mechanical resistance.


In early 2018, EnvisionTEC Inc. announced launch of E-Ortholign, a new material for the
direct 3D printing of clear thermoformed aligners .

This clear resin is marketed as biocompatible, stable, flexible and strong material for the direct 3D printing of esthetic retainers,Direct 3D printing of clear thermoformed aligners .

This clear resin is marketed as biocompatible, stable, flexible and strong material for the direct 3D printing of esthetic retainers.


To sum up
Direct 3D printing of aligners offers several advantages over conventional fabrication:




- Edges are softer and do not need trimming or smoothing
- Undercuts analysis is digitally defined
- Intra-aligner thickness is customizable, which may reduce the need of attachments that causes reducing the transparency of clear aligners.

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