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Clinical evaluation of the longevity and durability of an impressionless intraoral appliance (iNterra) system
Veeraraghavan Sundar1, Nels Ewoldsen, Phillip Hall
1Dentsply Prosthetics, York, PA, USA. vsundar@dentsply.com
Objective:
To clinically evaluate the durability of an impressionless intraoral appliance (iNterra) system, fabricated using a direct/indirect technique.
Methods:
Fifty-three (53) appliances were fabricated using the technique and followed for a median observation period of 301 days. Appliances were evaluated by calibrated operators for adaptation to teeth, retention, stability, and paresthesia, as reported by subjects, in addition to wear.
Results:
All restorations (100%) were rated acceptable for adaptation to teeth, retention, and stability at placement. At the longest recalls, 96.2% of appliances survived without fracture. A similar percentage (96.0%) were rated acceptable for adaptation to teeth, retention, and stability. Paresthesia (reversible malodor) was reported in one (1.9%) case. In terms of wear, 98.1% of appliances delivered were rated as "no wear evident" or "evident but acceptable wear."
Conclusion:
Overall, the evaluators agreed that the impressionless system offered procedural efficiency advantages, was clinically viable, and should be a valuable option to practitioners considering appliance therapy to control parafunctional behavior.
