Abstract
Objectives The aim of this research was to develop a sensor of approximation by reflectance
for guided surgery with dental implants without flap detachment, and verify the effectiveness
of this system.
Materials and Methods Ten models of total edentulous arches were divided into two groups. Two implants
of 3.5 × 11.5 mm (NeoDent) were inserted in each model; in Group 1 (G1), a stereolithographic
guide NeoGuide system was used. In Group 2 (G2), the experimental approximation sensor was used
for the insertion of the implants. The evaluation of the results was performed by
overlapping the virtual planning images with the tomographies of the models of the
implants inserted.
Results There were no statistically significant differences between the guide and the sensor
groups. The averages and standard deviations observed at the angulation of the guide
was 4.15 (2.65 degrees) and 5.48 (2.85 degrees) at the sensor. The linear deviations
at the cervical level were 0.002 (1.37) and 0.11 (1.47) mm and at the apical level
0.19 (1.28) and 0.21 (1.42) mm, respectively.
Conclusions The use of a guide is important for the stabilization of the drills; the greatest
challenge is to control the apical position of the implants, especially in highly
reabsorbed edges. The experimental sensor can become an auxiliary tool to the stereolithographic
guides; however, several difficulties must still be overcome to recommend the use
of a sensor.
Keywords
computer-assisted surgery - dental implants - ambulatory surgical procedures - tomography
- X-ray computed
