Orthodontic Clear Aligners in Medically Complex Patients: A Breif Case Report on Renal Dialysis

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  Orthodontic Clear Aligners in Medically Complex Patients: A Breif Case Report on Renal Dialysis Managing orthodontic patients with renal failure on hemodialysis requires a careful balance of clinical precision and patient safety. These cases demand modifications at every level—from material selection to treatment mechanics. I recently managed a case using Maxflex™ trilayer clear aligners, and I'd like to share the key protocols that guided a safe approach. The Medical Problems: Altered bone metabolism Increased bleeding risk (due to heparin during dialysis) Higher susceptibility to plaque accumulation and infection Potential toxicity concerns from aligner sheet materials 📋 My Modified Protocol: Timing: Procedures were scheduled on non-dialysis days to minimize bleeding risk. While this was not always fully, due to the patient's fluctuating health status, I adapted accordingly. Plaque Control & Attachments: Based on clinical research and expert opinion, attachments were e...
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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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