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Volume 15 , Issue 5
September/October 2000

Pages 668-674

Removal Torque and Histomorphometric Investigation of 4 Different Titanium Surfaces: An Experimental Study in the Rabbit Tibia

Giampiero Cordioli, MD, DDS, Zeina Majzoub, DCD, DMD, MScD, Adriano Piattelli, MD, DDS, Antonio Scarano, DDS

PMID: 11055134

This study presents a histomorphometric and biomechanical comparison of bone response to commercially pure titanium screws with 4 different types of surface topographies placed in the tibial metaphysis of 12 rabbits. Each rabbit had 4 implants placed, 2 in each tibia. The 4 surface topographies were a machined surface, a grit-blasted surface, a plasma-sprayed surface, and an acid-etched (Osseotite) surface. After a healing period of 5 weeks, histomorphometric and removal torque data revealed a significantly higher percentage of bone-to-implant contact and removal torque for acid-etched implants compared to machined, blasted, and plasma-sprayed implants. Within the limits of this short-term experimental study, the results indicated that micro-rough titanium surfaces obtained with acid-etching procedures achieved a 33% greater bone-to-implant contact over machined titanium surfaces with an abutment-type roughness and provided enhanced mechanical interlocking. (INT J ORAL MAXILLOFAC IMPLANTS 2000;15:668674) Key words: dental acid etching, endosseous dental implants, histomorphometry, surface properties, titanium

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