Dr. Skander Ellouze

Tunis

Dr. Skander Ellouze is an internationally recognized orthodontist based in Tunis, with a clinical practice centred on complex treatments and facial aesthetics. Over more than three decades, he has developed an approach grounded in biomechanical precision and facial harmony, built first on skeletal anchorage and fixed appliance mechanics, and today applied to aligner therapy, where the force system rather than the appliance defines the quality of tooth movement.


He lectures frequently at major international congresses and has taught in more than 40 countries. He is the author of Mini-Implants: Orthodontics for the Future (Quintessence) and serves as a Key Opinion Leader for Angel Aligner.


Alongside his lecturing, he mentors practitioners through advanced training programmes and immersive in-office sessions, and directs iMaster, an exclusive Orthodontic Master Program held twice a year in Monaco, bringing together clinicians from around the world to deepen their diagnostic and biomechanical expertise.


  • Abstract

    Anterior Torque with Aligners:

    From Force System to Root Expression


    Anterior torque expression remains one of the least predictable outcomes of aligner therapy. The gap reported between planned and achieved incisor inclination is well documented, and it originates less in the appliance itself than in the way the force system is generated by a thermoplastic shell andtransferred to the root. How that system arises, a couple delivered by an envelope of limited stiffness acting at a distance from the centre of resistance, will be set out first, since it explains where the moment-to-force ratio is lost. 


    During this presentation, published torque expression data will be discussed alongside treated cases, together with the design variables available to the clinician: staging and velocity, attachment geometryn and position, pressure areas and power ridges, and the use of auxiliaries or skeletal anchorage when the required root movement exceeds what the aligner alone can express.



    The objective is a working framework for anticipating torque loss, for assessing whether a given case falls within the mechanical envelope of aligners, and for identifying when adjunctive mechanics are indicated. Current evidence remains largely retrospective, and its limitations will be stated as such.

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