Evaluation of effects of brackets and orthodontic wires on intraoral scans: A prospective in‐vivo study

Abstract

ObjectiveTo evaluate any distortion produced by multibracket fixed orthodontic appliances on digital models obtained from intraoral scans (IOS), considering the presence of both brackets only and brackets/archwire combination.Setting/SampleThe IOS data of the arches of 20 patients (12 females and 8 males; mean age = 15.55 ± 2.84 years) were acquired using the CS3600 intraoral scanner (Carestream Dental, Atlanta, USA), without any appliances (model A), with vestibular brackets alone (model B) and then with brackets and orthodontic archwire fitted (model C).Materials and MethodsData were acquired between the months of January and October 2021 at the moment of indirect bonding phase. On each model, five intra‐arch linear measurements were obtained (inter‐canine, inter‐premolar 1 and 2, inter‐molar and arch depth), and after digital matching between model A and B (match 1) and A and C (match 2), the linear discrepancies were evaluated at 20 points (10 occlusal and 10 gingivolingual) previous identified on the reference model A. All measurements were performed using Geomagic Control X software (3D Systems, Morrisville, USA), and any dimensional variations and distortions were evaluated by the linear regression analysis and two‐sample t‐test (P ≤ .05).ResultsThe results show an almost perfect correlation between both models B and C and the reference model A, both as regards the intra‐arch linear measurements and the linear discrepancies found at the 20 identified points.ConclusionsMultibracket fixed orthodontic appliances do not produce any relevant distortions in digital models obtained via intraoral scanning. Therefore, the removal of archwire is not mandatory before IOS.

Evaluación de los remanentes de cemento tras el descementado de brackets linguales customizados y el posterior pulido con diferentes tipos de fresas y sistemas rotatorios: un estudio in vitro

“…Existen varios softwares que permiten alinear virtualmente los dientes de los pacientes y colocar los brackets en función de la prescripción y alineación del slot. Posteriormente esta posición puede ser ajustada por el profesional (93). Anteriormente, la técnica de cementado indirecto se realizaba cementando los brackets extraoralmente en modelos de estudio y creando la férula de transición a partir de ese modelo (94).…”

“…A posteriori, se crea la férula de transición en laboratorio o en clínica. La férula puede fabricarse directamente en clínica con impresoras 3D que utilizan resinas biocompatibles (93). Esta técnica de cementado ha sido denominada cementado indirecto digital y ha sido demostrada su eficiencia y efectividad (94).…”