Precision of implementing virtual setups for orthodontic treatment using CAD/CAM-fabricated custom archwires

ObjectivesThe SureSmile® process (OraMetrix®; Richardson, TX, USA) utilizes computer-aided design and computer-aided manufacturing (CAD/CAM). A virtual setup is created for treatment planning and chairside implementation using custom archwires fabricated by robots. The objective of this study was to determine the precision of this implementation.MethodsThe setup models of 26 consecutive patients were compared to models of the final outcome. Using a virtual matching process, the planned and the achieved tooth positions were superimposed and the differences between them calculated along three translational planes and three rotational axes, thus, yielding six deviation values for each tooth.ResultsThe median deviations were 0.19–0.21 mm based on translational movements and 1.77°–3.04° based on rotational movements. The precision of implementing the setups decreased from anterior to posterior, with incisors showing the best outcomes.ConclusionVirtual setups can be implemented in a clinically successful fashion with custom archwires fabricated by CAD/CAM in accordance with the SureSmile® process.ZusammenfassungZielsetzungDas untersuchte SureSmile-System (OraMetrix®, Richardson, Texas, USA) ist ein CAD/CAM-unterstütztes Verfahren, bei dem zur Behandlungsplanung ein virtuelles Set-up erstellt und dieses mit individuellen, robotergefertigten Bögen am Patienten umgesetzt wird. Ziel der Studie war es, die Präzision dieser Umsetzung zu bestimmen.Material und MethodeVerglichen wurden hierfür die Set-up- und Abschlussmodelle von 26 konsekutiv behandelten Patienten. Geplante und tatsächlich erreichte Position wurden in einem virtuellen Matchingprozess überlagert und die Abweichungen in drei Ebenen und drei Achsen berechnet.ErgebnisseErgebnis der Überlagerung waren sechs Messwerte für jedes korrespondierende Zahnpaar, die die Differenzen zwischen Set-up und Endsituation repräsentierten. Die mittleren Translationsabweichungen lagen zwischen 0.26 und 0.29 mm, die mittleren Rotationsabweichungen zwischen 2.75° und 3.89°. Das Set-up wurde an den Inzisivi am genauesten umgesetzt, von anterior nach posterior nahm die Präzision ab.SchlussfolgerungMit Hilfe der CAD/CAM-gefertigten Bögen des SureSmile-Systems kann das Set-up klinisch erfolgreich umgesetzt werden.

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