Agreement in the determination of preformed wire shape templates on plaster models and customized digital arch form diagrams on digital models

Agreement of the clinician's choice of archwire selection on conventional and virtual models

“…However, another study showed better agreement (Kappa .611-.719) among three orthodontists for selection of archwires for 20 mandibular plaster models. 19 The objective method can be used for selection of the most appropriate archwire for each patient. One objective approach is to choose the archwire by performing measurements on patient dental casts.…”

“…33 The difference between arch width measurements performed on plaster and digital models was 0.22-0.61 mm. In a more recent study, Camardella et al 19 showed that archwire selection for the mandibular arch using computer software had a 0.17-1.44 mm difference compared with wires selected subjectively on plaster models.…”

“…Some investigators have evaluated arch form determination and/or archwire selection using computer software. 9,17,19,20 Camardella et al 19 used midline, canine, and first molar bracket slot points for making digital arch form diagrams and compared them with arch form diagrams on dental casts. Arai and Will 17 used incisal edges, canine cusp tip, and buccal cusps of the premolars and molars for drawing the best-fitted polynomial curve.…”

Can 3D imaging and digital software increase the ability to predict dental arch form after orthodontic treatment?

“…According to a previous study, 2-3 mm of expansion in the premolar region does not invade the neutral zone and does not compromise the long-term stability of the treatment outcome. 20,21 In another study by Carmadella et al 22 3 examiners evaluated 20 pairs of dental casts with malocclusion by 2 methods: (1) they first found the best-fitted preformed archwire on dental plaster casts and (2) then selected an archwire on casts scanned by Ortho Analyzer software. They used the best-fit method for assessment of the fitness of wires with the mandibular dental arch.…”

“…Camardella et al 22 evaluated scanned mandibular casts by the software and achieved an ideal maxillary arch according to the mandibular arch by taking into account 2 mm of overjet. As mentioned earlier, some differences may exist for the coordination of the maxillary and mandibular arches.…”