Análisis de la morfología superficial de mini implantes ortodóncicos mediante microscopía electrónica de barrido y espectroscopía de rayos X de energía dispersiva

Abstract

Introduction: Mini implants have simplified the biomechanic movements during an orthodontic treatment. The roughness, surface morphology, and individual characteristics relate to the pullout resistance and primary stability of mini implants during dental movement. Objective. To evaluate the surface morphology and the chemical elemental composition of four brands of mini-implants using scanning electron microscopy (sem) and energy-dispersive X-ray spectroscopy (eds). Materials and methods: Four mini-implants commercially available in México (n=5 of each): m.o.s.a.s. (Dewimed®), Implant quick (Borgatta), Vector tas (Ormco™) and OrthoEasy (Forestadent®) were evaluated. Surface morphology was assessed by sem (jeol 5600LV, Japan) with secondary electrons in high vacuum mode (20 keV). eds analyses were performed with 45 readings per group. Results: The analyzed brands presented homogenous polished zones, with few marks of the manufacturing processes. OrthoEasy shows the lowest conicity with 0.02°, followed by Implant quick and Vector tas with 0.04°. The principal element in all brands was Titanium with 84.3-82.8%, the Aluminum content was between 11.3-12.8 %, and the Vanadium content was 4.3-4.4% (anova, p>0.05). Discussion: The percentage of aluminum is higher than the 5.5-6.5% established in the astm F-136-08 standard. It is not a common element in the human body. Conclusion: The main differences in the mini implant morphology are the thread and the form of the tip. The chemical elemental composition is homogeneous, but the aluminum content is higher than the specified by the astm F-136-08 standard.