Morphological evaluation of the active tip of six types of orthodontic mini-implants
Dental press j. orthod. (Impr.)
; 18(2): 36-41, Mar.-Apr. 2013. ilus, tab
Article
in En
| LILACS
| ID: lil-683182
Responsible library:
BR1.1
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 cor-relate the analyzed characteristics aiming to determine the best performance.RESUMO
OBJETIVO:
avaliar morfologicamente a ponta ativa de seis diferentes tipos de mini-implantes autoperfurantes para controle de ancoragem ortodôntica.MÉTODOS:
foram obtidas imagens das pontas ativas dos mini-implantes com o microscópio óptico Stemi 2000-C (Zeiss) com aumento de 1,6X. As imagens das superfícies foram analisadas no programa Axio Vision (Zeiss, Jena, Alemanha) para cálculo das medidas lineares e angulares. As morfologias dos mini-implantes e os detalhes das pontas e das roscas também foram avaliados por meio do Microscópio Eletrônico de Varredura (MEV) (JEOL, modelo JSM-5800 LV - JEOL, Tóquio, Japão) com aumentos de 90X e 70X, respectivamente. A avaliação da conicidade do mini-implante foi calculada de acordo com a fórmula (b - a) / (2 x D).RESULTADOS:
foram medidos (1) comprimento da ponta ativa, (2) diâmetro externo, (3) alma e conicidade do mini-implante, (4) número e passo das roscas, (5) ângulo do filete da rosca, (6) comprimento do flanco da rosca e (7) comprimento do fundo do filete da rosca.CONCLUSÕES:
mini-implantes de diferentes fabricantes apresentaram suas pontas ativas com características diversas. Ensaios mecânicos são necessários para correlacionar as características analisadas.Key words
Full text:
1
Collection:
01-internacional
Database:
LILACS
Main subject:
Bone Screws
/
Dental Implants
/
Orthodontic Appliance Design
/
Orthodontic Anchorage Procedures
Type of study:
Evaluation_studies
/
Prognostic_studies
Language:
En
Journal:
Dental press j. orthod. (Impr.)
Journal subject:
ORTODONTIA
Year:
2013
Document type:
Article
Affiliation country:
Brazil
Country of publication:
Brazil