Bacterial biofilm on successful and failed orthodontic mini‐implants—a scanning electron microscopy study

Abstract

Mini-implants have been extensively used in Orthodontics as temporary bone anchorage devices. However, early failure of mini-implants due to mobility might occur and the colonization of their surfaces by pathogenic bacteria has been referred to as one of the contributing factors. In this study, scanning electron microscopy (SEM) was used to assess the presence of microorganisms adhered to the surface of mini-implants that failed due to loss of stability. Twelve self-drilling titanium mini-implants (1.6 mm diameter × 9.0 mm long) were collected from 12 patients undergoing orthodontic treatment-7 successful and 5 failed mini-implants. The mean time of permanence in the mouth was 15.8 and 2.4 months for successful and failed mini-implants, respectively. The devices were placed in the maxilla and/or mandible and removed by the same surgeon and were processed for SEM analysis of the presence of microorganisms on their surfaces (head, transmucosal profile, and body). Extensive bacterial colonization on mini-implant head and transmucosal profile was observed in all successful and failed mini-implants. None of the failed mini-implants exhibited bacteria on its body and only one mini-implant belonging to the successful (stable) group exhibited bacteria on its body. The results did not suggest a relationship between failure and presence of bacterial colonies on mini-implant surfaces.

Analysis of Oral Microbiome on Temporary Anchorage Devices Under Different Oral Hygiene Conditions

“…When a TAD is inserted, a new site is created, which is de ned as the gingival sulcus between the surrounding gingiva and the TAD cervical [24]. In a previous study utilizing SEM, Ferreira discovered bacteria colonization on the head, transmucosal surface, and body segment of TADs [25]. Similarly, in our study, the existence of micro ora was observed on the surface of TADs.…”

New and Recovered Temporary Anchorage Devices, In Vitro Assessment of Structural and Surface Properties

“…There are ethical considerations surrounding the re-use of invasive medical devices in different patients, despite the advantages with respect to costs. TADs may be used again in the same patient if the structural integrity and mechanical properties are not altered following their previous use, and following sterilization [ 49 ].…”

Factores de riesgo para el fracaso de los minitornillos de ortodoncia. Revisión de la literatura

“…Los minitornillos son fijaciones de titanio o acero inoxidable que se han utilizado ampliamente en ortodoncia como dispositivos temporales de anclaje óseo (Ferreira et al 2015) permiten un anclaje absoluto o esquelético cuando el tratamiento ortodóntico así lo requiere (Benavides et al 2016) el anclaje esquelético, ha sido la opción de reemplazo al anclaje convencional en situaciones en las que el anclaje se considera crítico, insuficiente o particularmente en los tratamientos poco conservadores que produzca efectos secundarios indeseables (Leo et al 2016).…”