Influence of orthodontic mini-screw surface modifications on implant topography and osseointegration: an in- vivo study.

Abstract

Introduction: Implant-supported orthodontic treatment has gained an expanded interest by researchers and orthodontists in the recent years. Therefore, different methods were tried to achieve the best results in this kind of treatment. Aim of the study:The current research was conducted to compare the effect of 2 different treatment methods on the surface of orthodontic titanium mini-screws and on bone response to the treated implants.Materials and methods: Forty-eight titanium mini-screw implants were distributed under 3 equal groups; as received, sandblasted, and laser-treated, respectively. After application of the surface-treatment methods, half of the selected screws were tested for surface morphology, using a scanning electron microscope (SEM) and a digital profilometer. To evaluate the biological effects of surface treatment methods, the other screws were implanted in rabbits' tibias which were subjected to histological examination at the end of the experimental periods of 4 and 8 weeks. The surgical procedures and euthanasia were conducted according to the limitations of Research Committee of Mansoura University.Results: Sandblasted implants showed the highest surface roughness and the most pronounced bone response. Conclusion:Sandblasting surface treatment provide more favorable conditions for implant osseointegration, in comparison to laser-treatment.

Enhancement of bioactivity and osseointegration in Ti-6Al-4V orthodontic mini-screws coated with calcium phosphate on the TiO2 nanotube layer

“…Typically, surface treatment methods change the morphology and roughness of the mini-screw surface layer or bond the bioactive materials on the surface. 7 , 21 , 22 …”

“…Typically, surface treatment methods change the morphology and roughness of the mini-screw surface layer or bond the bioactive materials on the surface. 7,21,22 Methods of forming the micro/nanostructures on the surface of titanium mini-screws to increase their osseointegration ability have been investigated. According to several studies, the nanostructured surface has a larger surface area than the microstructured surface, leading to better osseointegration.…”

“…6 To improve these problems and increase the clinical success rate, coating of the titanium orthodontic mini-screws with bioactive ceramic material or hydroxyapatite, a component of bone, has been used to impart surface activity. 1 , 7 - 9 However, these methods induce osseointegration at the initial stage of implantation, and it is difficult to obtain bond strength between the coating layer and the underlying titanium. Reports have demonstrated that the coating layer that forms thickly on titanium is weak and can be easily peeled off from the surface.…”