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- Title
Morphological evaluation of the active tip of six types of orthodontic mini-implants.
- Authors
Fernandes Kitahara-Céia, Flávia Mitiko; Assad-Loss, Tatiana Féres; Nelson Mucha, José; Nelson Elias, Carlos
- Abstract
Objective: To morphologically evaluate the active tip of six different types of self-drilling mini-implants for orthodontic anchorage. Methods: Images of the active tips of the mini-implants were obtained with a Zeiss optical microscope, Stemi 200- C with magnification of 1.6X. The images of the surface were viewed with the Axio Vision program (Zeiss, Jena, Germany) to calculate linear and angular measures. Mini-implant morphology and the details of tips and threads were also evaluated through Scanning Electronic Microscopy (SEM) (JEOL, model JSM5800 LV -- JEOL, Tokyo, Japan) with magnifications of 90X and 70X, respectively. The evaluation of the mini-implant taper shape was assessed using to the formula: (b - a) / (2 x D). Results: The following variables were measured: (1) active tip width, (2) major diameter of external thread, (3) minor diameter of internal thread and taper of the mini-implant, (4) number of threads and lead of the screw, (5) angle of thread, (6) flank width and (7) pitch width. Conclusion: Mini-implants from different manufacturers presented active tips with different characteristics. Mechanical testing is necessary to correlate the analyzed characteristics aiming to determine the best performance.
- Subjects
DENTAL implants; ORTHODONTIC appliances; ORTHODONTICS; DENTAL equipment; SCANNING electron microscopy
- Publication
Dental Press Journal of Orthodontics, 2013, Vol 18, Issue 2, p36
- ISSN
2176-9451
- Publication type
Article
- DOI
10.1590/S2176-94512013000200012