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

· Prospective follow up

· Treatment protocol

o Anterior bite ramps, lingual pressure areas, class 2 / vertical elastics, extrusion 1mm of posterior teeth, Lower premolars - rectangular long attachments, Heavy posterior occlusal contacts

· No overcorrection

WHAT DID THEY FIND

· Overbite corrected in every case 3.5mm

· 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 SIGNIFICAN DIFFERENCE

CONCLUSION

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

2. Aligners are more efficient than labial fixed

IMPROVEMENTS / COMMENTS

· Why did labial fixed cases take 30+ months non-extraction

· Retrospective study, RCT would be more robust