Evaluation of stability of titanium and hydroxyapatite‐coated osseointegrated dental implants: a pilot study

Abstract

An endosseous implant is described as osseointegrated when it is immobile in function. Objective measures of stability testing have been described. The Periotest is a commercially available device that is used for this purpose. This study was designed to measure stability of endosseous implants placed in the mandible. Implants were placed in the mandibular canine or first premolar area to support an overdenture prosthesis. Stability was evaluated through the use of a Periotest device at the time of implant placement and following one year of functional loading. Implant designs were either a screw-shaped titanium alloy or a hydroxyapatite-coated cylinder. A total of 54 implants were placed, 37 were titanium screw-shaped implants, while the remaining 17 were hydroxyapatite cylinders. Initial measurements of stability showed no difference due to implant type. Following one year of functional loading, titanium screw-shaped implants were more stable than hydroxyapatite implants (P < 0.05). The difference in implant rigidity following a period of functional loading may be an indication of a difference in osseointegration between the two implants used in this study.

Dental implant induced bone remodeling and associated algorithms

“…Following this, the dental implant gains increasing stability as a result of functional remodeling in the surrounding bone. As such, a positive "steady state" of remodeling can be reached over time, where bone is properly engaged and a low rate of implant failure can be achieved (Roberts et al, 1992;Simunek et al, 2002). Implant failures are mostly related to crestal bone loss (Callan et al, 1998).…”

Synthesis and characterization of biocompatible-nanohydroxyapatite crystals obtained by a modified sol-gel processing

“…This material has been reported in many different ways, i.e., as solid, crystalline or amorphous powder and coating. In the last years, its application has been focused as HA nanocrystals (nHA) for bone implants, as composite polymeric biocompatible fibers, as a coating on titanium prosthesis, 8 , 9 as well as in the drug delivery field 10 - 17 . When the HA is implanted, the processes of resorption, osteoconduction and bioactivity may occur, which make it very valuable for medical purposes.…”

Ceramic hydroxyapatite coating on titanium implants drives selective bone marrow stromal cell adhesion

“…Implant design, implant material and surface topography are important implant-related factors (Albrektsson et al 1981;Wennerberg et al 1997;Karlsson et al 1998;Wennerberg & Albrektsson 2000). Titanium implants perform very well when inserted into cortical bone but additional modification is needed in those cases where the implant is placed into trabecular bone (Huang et al 2002;Simunek et al 2002). Titanium implants perform very well when inserted into cortical bone but additional modification is needed in those cases where the implant is placed into trabecular bone (Huang et al 2002;Simunek et al 2002).…”