Published in:
01-06-2014 | Original Article
RETRACTED ARTICLE: Biomechanical and histological evaluation of four different titanium implant surface modifications: an experimental study in the rabbit tibia
Authors:
José Luis Calvo-Guirado, Marta Satorres, Bruno Negri, Piedad Ramirez-Fernandez, Jose Eduardo Maté-Sánchez, Rafael Delgado-Ruiz, Gerardo Gomez-Moreno, Marcus Abboud, Georgios E. Romanos
Published in:
Clinical Oral Investigations
|
Issue 5/2014
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Abstract
Objectives
This study presents a biomechanical comparison of bone response to commercially pure titanium screws with four different types of surface topographies placed in the tibial metaphysis of 30 rabbits.
Materials and methods
One hundred twenty implants were tested double-blinded: (a) blasted, acid-etched, and discrete crystal deposition (DCD), (b) blasted, (c) acid-etched, and (d) blasted and acid-etch. Resonance frequency analysis (RFA/ISQ), reverse torque values (RTV), and bone-to-implant contact (BIC) were measured at the time of implant insertion (day 0), 15, 28, and 56 days of healing.
Results
All groups tested demonstrated increased RFA/ISQ and RTV results over the time course. At 15 days, the blasted, acid-etched, and DCD group demonstrated a non-significant trend toward higher values when compared to the blasted and etched group (33.0 ± 16 vs. 26.3 ± 12 Ncm, p = .16). At 56 days, the groups utilizing blasting to create additional surface roughness (Sa > 1 micron) showed a statistical significant difference in RTQ versus the non-blasted group (38.5 ± 14 vs. 29.5 ± 9 Ncm, p = .03).
Conclusions
Within the limitations of this study, only the increase in surface roughness (Ra > 1) at 56 days demonstrated statistically significant effects on RTQ. Other additional surface features, such as sub-micron scale DCD, demonstrated improved healing trends but without significance for clinical applications.