Removal torque and histomorphometric evaluation of bioceramic grit-blasted/acid-etched and dual acid-etched implant surfaces

An experimental study in dogs

Charles Marin, Rodrigo Granato, Marcelo Suzuki, Jose N. Gil, Adriano Piattelli, Paulo Coelho

Research output: Contribution to journalArticle

Abstract

Background: Surface modifications to dental implants have been used in an attempt to accelerate the osseointegration process. The objective of this study was to biomechanically/histomorphometrically evaluate a bioceramic grit-blasted and acid-etched surface (BGB/AA; test) versus a dual acid-etched implant surface (control) in a beagle dog model. Methods: Control and BGB/AA implants were subjected to a series of physicochemical characterization tools, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and auger photoelectron spectroscopy (APS). The animal model included the placement of 72 implants along the proximal tibiae of six beagle dogs, which remained in place for 2 or 4 weeks. After euthanization, half of the specimens were biomechanically tested (removal torque), and the other half was non-decalcified processed to slides of ∼30 mm thickness for histomorphologic and histomorphometric (percentage of bone-to-implant contact [%BIC]) evaluation. Analysis of variance at the 95% confidence level and the Tukey post hoc test were used for multiple comparisons. Results: SEM and AFM showed that surface microtextures were qualitatively and quantitatively different and that the BGB/AA surface presented higher submicrometer average roughness values (R a) and root mean square (RMS) values compared to control surfaces. Ca and P were detected at the BGB/AA surface by APS. Higher degrees of bone organization were observed along the perimeter of the BGB/AA surface compared to control, despite the non-significant differences in %BIC between the surfaces (P>0.25). Significantly higher removal torque was observed for the BGB/AA implants at both time periods (P<0.0001). Conclusion: According to the biomechanical and histomorphologic results, early biomechanical fixation was positively affected by the BGB/AA surface compared to the dual-acid etched surface.

Original languageEnglish (US)
Pages (from-to)1942-1949
Number of pages8
JournalJournal of Periodontology
Volume79
Issue number10
DOIs
StatePublished - Oct 2008

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Torque
Photoelectron Spectroscopy
Atomic Force Microscopy
Dogs
imidazole mustard
Electron Scanning Microscopy
Acids
Osseointegration
Bone and Bones
Dental Implants
Tibia
Analysis of Variance
Animal Models

Keywords

  • Animal studies
  • Dental implants
  • Torque

ASJC Scopus subject areas

  • Periodontics

Cite this

Removal torque and histomorphometric evaluation of bioceramic grit-blasted/acid-etched and dual acid-etched implant surfaces : An experimental study in dogs. / Marin, Charles; Granato, Rodrigo; Suzuki, Marcelo; Gil, Jose N.; Piattelli, Adriano; Coelho, Paulo.

In: Journal of Periodontology, Vol. 79, No. 10, 10.2008, p. 1942-1949.

Research output: Contribution to journalArticle

Marin, Charles ; Granato, Rodrigo ; Suzuki, Marcelo ; Gil, Jose N. ; Piattelli, Adriano ; Coelho, Paulo. / Removal torque and histomorphometric evaluation of bioceramic grit-blasted/acid-etched and dual acid-etched implant surfaces : An experimental study in dogs. In: Journal of Periodontology. 2008 ; Vol. 79, No. 10. pp. 1942-1949.
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abstract = "Background: Surface modifications to dental implants have been used in an attempt to accelerate the osseointegration process. The objective of this study was to biomechanically/histomorphometrically evaluate a bioceramic grit-blasted and acid-etched surface (BGB/AA; test) versus a dual acid-etched implant surface (control) in a beagle dog model. Methods: Control and BGB/AA implants were subjected to a series of physicochemical characterization tools, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and auger photoelectron spectroscopy (APS). The animal model included the placement of 72 implants along the proximal tibiae of six beagle dogs, which remained in place for 2 or 4 weeks. After euthanization, half of the specimens were biomechanically tested (removal torque), and the other half was non-decalcified processed to slides of ∼30 mm thickness for histomorphologic and histomorphometric (percentage of bone-to-implant contact [{\%}BIC]) evaluation. Analysis of variance at the 95{\%} confidence level and the Tukey post hoc test were used for multiple comparisons. Results: SEM and AFM showed that surface microtextures were qualitatively and quantitatively different and that the BGB/AA surface presented higher submicrometer average roughness values (R a) and root mean square (RMS) values compared to control surfaces. Ca and P were detected at the BGB/AA surface by APS. Higher degrees of bone organization were observed along the perimeter of the BGB/AA surface compared to control, despite the non-significant differences in {\%}BIC between the surfaces (P>0.25). Significantly higher removal torque was observed for the BGB/AA implants at both time periods (P<0.0001). Conclusion: According to the biomechanical and histomorphologic results, early biomechanical fixation was positively affected by the BGB/AA surface compared to the dual-acid etched surface.",
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AB - Background: Surface modifications to dental implants have been used in an attempt to accelerate the osseointegration process. The objective of this study was to biomechanically/histomorphometrically evaluate a bioceramic grit-blasted and acid-etched surface (BGB/AA; test) versus a dual acid-etched implant surface (control) in a beagle dog model. Methods: Control and BGB/AA implants were subjected to a series of physicochemical characterization tools, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and auger photoelectron spectroscopy (APS). The animal model included the placement of 72 implants along the proximal tibiae of six beagle dogs, which remained in place for 2 or 4 weeks. After euthanization, half of the specimens were biomechanically tested (removal torque), and the other half was non-decalcified processed to slides of ∼30 mm thickness for histomorphologic and histomorphometric (percentage of bone-to-implant contact [%BIC]) evaluation. Analysis of variance at the 95% confidence level and the Tukey post hoc test were used for multiple comparisons. Results: SEM and AFM showed that surface microtextures were qualitatively and quantitatively different and that the BGB/AA surface presented higher submicrometer average roughness values (R a) and root mean square (RMS) values compared to control surfaces. Ca and P were detected at the BGB/AA surface by APS. Higher degrees of bone organization were observed along the perimeter of the BGB/AA surface compared to control, despite the non-significant differences in %BIC between the surfaces (P>0.25). Significantly higher removal torque was observed for the BGB/AA implants at both time periods (P<0.0001). Conclusion: According to the biomechanical and histomorphologic results, early biomechanical fixation was positively affected by the BGB/AA surface compared to the dual-acid etched surface.

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