Abstract
Statement of problem
Static guided implant surgery may be the most accurate method of implant placement
to date. However, within the same guided implant system, whether accuracy is affected
when placing a larger diameter implant that requires more drills than a smaller diameter
implant is unclear.
Purpose
The purpose of this in vitro study was to evaluate the influence of implant diameter
on the angulation and 3-dimensional (3D) deviations of posterior single implant placement
using static guided surgery.
Material and methods
A polyurethane dental cast was made with an edentulous site at the maxillary right
first molar position. Identical implant planning for each of 3 dental implant diameters
3.3, 4.1, and 4.8 mm (Straumann BLT) were made, and surgical guides for each implant
diameters were fabricated by stereolithography. Fifteen implants of each diameter
(N=45) were placed in simulated casts. A scan body was placed and the cast was scanned
using an intraoral scanner. The positional discrepancies of implant placement, including
angulation as well as 3D implant cervical and apex area deviations, were compared
with the planned position. Linear ANOVA single factor analysis (ɑ=.05) was used, and
box plots were made.
Results
The ranges of angulation deviations for 3.3-, 4.1-, and 4.8-mm implants were 3.6 degrees
to 6.0 degrees, 3.7 degrees to 7.7 degrees, and 3.1 degrees to 6.7 degrees, respectively.
The ranges of 3D implant entry deviations of 3.3-, 4.1-, and 4.8-mm implants were
0.96 to 1.4, 0.85 to 1.72, and 0.89 to 1.78 mm, respectively. The ranges of 3D implant
apex of 3.3-, 4.1-, and 4.8-mm implants were 0.63 to 1.21, 0.64 to 1.48, and 0.48
to 1.27 mm, respectively. No statistically significant differences were found in any
of the 3 measurements: P=.67 for deviation in angulation; P=.27 for 3D implant deviation of entry; and P=.3 for 3D implant deviation of the apex.
Conclusions
Implant diameters had no significant effect on placement deviations when a single
posterior static guided surgery was used.
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Article info
Publication history
Published online: December 02, 2022
Publication stage
In Press Corrected ProofFootnotes
Funding was provided by a Mahidol University internal grant for materials other than implant fixtures.
Identification
Copyright
© 2022 by The Editorial Council for the Journal of Prosthetic Dentistry.
