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Invisalign European scientific symposium Part 1 deepbites. Episode 10. May 23rd 2020

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Hosted by
Farooq Ahmed

Summary of the Invisalign European Scientific Symposium, with Dr Alessandro Mario and Dr Dieter Brothag presenting their studies

Alessandro Mario 

Aligners resolve deep bites by

  • Anterior bite turbos  – allow posterior extrusion, and progressively move incisal
  • Anterior intrusion
  • Pressure areas  – force through indentations into the aligner

WHO

  • N = 44 with complete OB of 7mm+
  • hypodivergient SnGoGn less 25

WHAT DID THEY DO IT

Treatment protocol

  • Anterior bite ramps, lingual pressure areas, class 2 / vertical elastics, extrusion 1mm of posterior teeth, Lower premolars – rectangular long attachments, Heavy posterior occlusal contacts
  • Prospective
  • No overcorrection

WHAT DID THEY FIND

  1. Overbite corrected in every case 3.5mm
  2. Average time 11 months. 26 aligners

CONCLUSION

  • Aligners effective at correcting deep bites, if posterior extrusion is planned

IMPROVEMENTS / COMMENTS

  • Did extrusion occur? –  Rossinia 2015 SR stated most difficult movement with aligners?

 

Changing the paradigm of deepbite treatmentDieter Brothag

WHO

  • ·N = 50 with complete OB of 7mm+
  • IOTN 3+

WHAT DID THEY DO IT

  • Retrospective follow up
  • Normal practie protocols for both treatments
  • Fixed labial Vs Aligners
  • Non-extraction

WHAT DID THEY FIND

Effectiveness – PAR changes

  • Labial fixed:  20 – 4
  • Invisalign:  18 – 3

NO STATISTICAL DIFFERENCE

Efficiency – duration

  • Labial fixed:  30+ months
  • Invisalign:  20 months

STATISTICALLY SIGNIFICANT DIFFERENCE

CONCLUSION

1. Aligners as effective at correcting deep bites as labial fixed

2. Aligners are more efficient than labial fixed

IMPROVEMENTS / COMMENTS FROM ME

  • Why did labial fixed cases take 30+ months non-extraction
  • Retrospective study, RCT would be more robust
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