STUDY OBJECTIVES AND METHODS

The purpose of this 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. 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

Adapted from P Thanasrisuebwong et al., J Prosthet Dent. 2024 Oct;132(4):801-808, for more info about this publication, click HERE

This review is part of the Straumann "Scientific Highlights Newsletter 6/24"

Other highlights of this issue:

• Osseointegration of anodized vs. sandblasted implant surfaces in a guided bone regeneration acute dehiscence-type defect: An in vivo experimental mandibular minipig model
• Reconstructive surgical treatment of peri-implantitis with use of a chitosan brush for decontamination- case series with 1-year follow-up
• Mandibular overdenture retained by four one-piece titanium-zirconium mini implants: A 2-year follow-up on prosthodontic outcomes
• Implant Stability After Graftless Motor-Driven Crestal Sinus Elevation: A Cohort Study
• Intraoral scanning for implant-supported complete-arch fixed dental prostheses (ISCFDPs): Four clinical reports 
• Advances in osteoimmunomodulation of biomaterials after intrabone implantation: focus on surface hydrophilicity