Linear and Angular Deviations of Implants Placed in Experimental Casts with Stereolithographic Drill Guides Fixed by O'ring Ortho Implant Devices

Abstract

The aim of this study was to evaluate whether the introduction of a device, resulting from the combination of an o'ring attachment with an orthodontic implant (o'ring ortho implant, O'ROI), to affix the surgical template of CAD/CAM-guided implant surgery contribute to minimizing the deviations in the position and inclination of implants at the time of their placement. Ten models simulating bone tissue were fabricated and randomly divided into 2 groups: 5 with the scanning and surgical template of the usual technique, representing the Control Group (C), and 5 with scanning and surgical templates fixed by o'ring ortho implants (O'ROI), representing the Test Group (T). Forty implants measuring 4x11 mm were placed in the groups, using the respective templates. The results were evaluated by the fusion of CT images of the planned and placed implants. The locations and axes were compared. There were no statistically significant differences for the angular (Tukey's test F = 1.06 and p = 0. 3124) and linear (ANOVA F = 2.54 and p = 0.11) deviations. However, the angular values of Group T showed a lower standard deviation in comparison with those of Group C. The use of o'ring ortho implants (O'ROI) is able to minimize the angular and linear deviation of implants at the time of their placement.

Auxiliary Reflectance Sensor for Guided Surgery with Dental Implants: In Vitro Study

“…Ten models of acrylic resin with bone meal, bone and gum tissue simulators, prototypes, 7 and identical copies of a single model were divided into two groups (►Fig. 1).…”

“…The mixing ratio of the two materials was one part of acrylic resin (25 g of polymer) to three parts of bone meal (75 g). 7 The model was obtained from a total edentulous manikin that was worn out on the entire surface of the alveolar ridge and palate, which leaves the space for the layer of artificial gingiva, made by means of several perforations in the model of gypsum, with spherical drill, 2 mm in diameter. With a round cutter of tungsten carbide, several points were united in such a way that, in the end, the whole model had a wear of 2 mm, area related to the gingival mucosa.…”

Suitability of virtual plaster models superimposed with the lateral cephalogram for guided paramedian orthodontic mini-implant placement with regard to the bone support

“…Several studies have already reported the use of drilling guides for OMI placement [7,17,19,23]. Recently, Cassetta et al and De Gabriele et al described new CAD/CAM surgical templates that were specifically designed for palatal orthodontic appliances to minimise implant site preparation and OMI placement [5,7].…”

“…Several studies have already reported the use of drilling guides for OMI placement [ 7 , 17 , 19 , 23 ]. Recently, Cassetta et al.…”