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Clinical evaluation of an improved cementation technique for implant-supported restorations: a randomized controlled
Luigi Canullo1,2, Roberto Cocchetto3, Fabio Marinotti4
1Private Practice and Independent Researcher, Rome, Italy.
Clinical Oral Implants Research
|April 8, 2015
Summary
Extraoral cementation significantly reduces cement remnants around dental implants compared to intraoral techniques. While extraoral methods create more voids, careful technique and low-adhesivity cement minimize remnants with intraoral cementation.
Area of Science:
- Dental Implantology
- Prosthodontics
- Biomaterials
Background:
- Cement remnants are a known risk factor for peri-implantitis.
- Shoulderless abutments raise concerns regarding the effective removal of excess cement.
Purpose of the Study:
- To compare intraoral versus extraoral cementation techniques for implant-supported restorations.
- To evaluate the impact of shoulderless versus chamfer abutment designs on cement remnant removal.
Main Methods:
- 46 patients with double implant-supported restorations were randomized into intraoral or extraoral cementation groups.
- Abutments were assigned to shoulderless or chamfer subgroups.
- Cement remnants, marginal gaps, and internal voids were quantified microscopically after 3 months.
Main Results:
- Extraoral cementation resulted in significantly less cement remnants in the peri-implant sulcus compared to intraoral cementation.
- Intraoral cementation showed higher cement remnants (0.45 mm² shoulderless, 0.38 mm² chamfer).
- Extraoral cementation led to significantly more voids at the abutment/crown interface (0.485 mm² shoulderless, 0.477 mm² chamfer).
Conclusions:
- Extraoral cementation is effective in reducing excess cement, despite creating more internal voids.
- Careful technique and low-adhesivity cements can minimize cement remnants even with intraoral cementation.
