Comparative study of root resorption between two methods for accelerated orthodontic tooth movement

Ahmed Ragab Elkalza, Ahmed Shawkat Hashem, Mohammad Khursheed Alam


Objective: The aim of this study was to assess apical root resorption (RR) following the application of micro-osteoperforation (MOP) and piezocision (PzC) assisted orthodontics for the acceleration of tooth movement (TM). Materials and Methods: A total number of 16 patients seeking orthodontic therapy were included in this study. All patients had undergone 1st premolars extraction and were indicated for canine retraction. These patients were divided into two groups; one was treated using MOP in one side while the other side served as control. In the other group PzC was performed in one side with no intervention done on the other side. Cone-beam Computed Tomography (CBCT) scans were obtained for every patient before and after canine retraction in order to evaluate amount of RR. Results: In the MOP group, there was no significant difference in canine root length between experimental and control sides. Whereas, in the PzC group, there was a statistically significant decrease in root length in the experimental side compared with the control side. When comparing both groups, the experimental PzC side showed a statistically significant decrease in root length compared to experimental MOP side postoperatively. Conclusion: Experimental PzC showed statistically significant decreases in canine root length compared to both experimental MOP and control side after canine retraction.

Estudio comparativo de la reabsorción radicular entre dos métodos para el movimiento ortodóntico acelerado de los dientes.

El objetivo de este estudio fue evaluar la reabsorción de la raíz apical (RR) después de la aplicación de la ortodoncia asistida por micro-osteoperforación (MOP) y piezocisión (PzC) para la aceleración del movimiento dental (TM). Materiales y métodos: un total de 16 pacientes que buscaban terapia de ortodoncia fueron incluidos en este estudio. Todos los pacientes habían sido sometidos a extracción del primer premolar y estaban indicados para la retracción canina. Estos pacientes fueron divididos en dos grupos; uno fue tratado usando MOP en un lado, mientras que el otro sirvió como control. En el otro grupo, PzC se realizó en un lado sin ninguna intervención en el otro lado. Se obtuvieron exploraciones de tomografía computarizada de haz cónico (CBCT) para cada paciente antes y después de la retracción canina para evaluar la cantidad de RR. Resultados: en el grupo MOP, no hubo diferencias significativas en la longitud de la raíz canina entre los lados experimental y control. Considerando que, en el grupo PzC, hubo una disminución estadísticamente significativa en la longitud de la raíz en el lado experimental en comparación con el lado de control. Al comparar ambos grupos, el lado experimental de PzC mostró una disminución estadísticamente significativa en la longitud de la raíz en comparación con el lado de MOP experimental después de la operación. Conclusión: el PzC experimental mostró disminuciones estadísticamente significativas en la longitud de la raíz canina en comparación con el MOP experimental y el lado de control después de la retracción canina.


root resorption, micro-osteoperforation, piezocision, canine retraction, Cone-beam Computed Tomography. Reabsorción radicular, micro-osteoperforación, piezocisión, retracción canina, tomografía computarizada de haz cónico


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