ABSTRACT
Longitudinal differences on the left and right sides of the jaw with respect to the midline in three spatial planes are called mandibular asymmetries. Objective: To determine the frequency of mandibular asymmetries in three spatial planes by means of Cone Beam computed tomography (CBCT) and classify them according to the degree of difference between both sides. Methods: A total of 40 Cone Beam volumetric tomography (New Tom 3G Cone Beam Volumetric tomographic scanner) records were analyzed using simple random sampling of patients between the ages of 18 and 70 from 2011 until 2013. Axial slices were obtained from the lingula in cranio-caudal direction every 5 mm until the gonial angle. Results: From the records, 2.5 percent showed moderate degree of difference in the length of the mandibular body with predominance on the right side. For breadth of the ramus, predominance was found on the left side. In the length of the mandibular ramus, 10 percent presented moderate degree of predominance on the right side. Conclusions: 1) asymmetries are more frequent at the level of the mandibular ramus thickness; (2) moderate and severe degrees of differences are most frequently found in the mandibular ramus thickness. 3) It is not possible to proportionally determine mandibular ramus thickness only with a 2D image...
Se denominan asimetrías mandibulares a las diferencias longitudinales de los lados derecho e izquierdo de la mandíbula con respecto a la línea media en los tres planos espaciales. Objetivo: Determinar la frecuencia de asimetrías mandibulares en los tres planos del espacio por medio de tomografía computarizada Cone Beam (TCCB) y clasificarlas según el grado de diferencia entre ambos lados. Métodos: Se analizaron 40 registros de tomografía volumétrica Cone Beam, (New Tom 3G Cone Beam Volumetric Tomographic Scanner) mediante muestreo aleatorio simple de pacientes entre los 18 y 70 años de edad, entre los años 2011 y 2013. Se obtuvieron cortes axiales a partir de la língula en sentido cráneo-caudal cada 5 mm hasta llegar al ángulo goníaco. Resultados: El 2,5 por ciento de los registros presentaron diferencias moderadas en la longitud del cuerpo mandibular con predominio del lado derecho. En la amplitud de la rama se encontró predominio del lado izquierdo. En la longitud de la rama mandibular el 10 por ciento presentó predominio moderado del lado derecho. Conclusiones: 1) las asimetrías más frecuentes se encuentran a nivel del grosor de las ramas mandibulares. 2) Los grados de diferencias moderados y altos se presentan con mayor frecuencia en el grosor de las ramas mandibulares. 3) No es posible determinar proporcionalmente el grosor de las ramas mandibulares obteniendo solo una imagen 2D...
Subject(s)
Humans , Male , Adolescent , Adult , Female , Young Adult , Middle Aged , Cone-Beam Computed Tomography , Mandible , ColombiaABSTRACT
Objective:To evaluate the application of microsplint and circumferential wiring in the treatment of mandibular body frac-ture in children.Methods:23 children with mandibular body fracture were treated by microsplint and circumferential wiring from 2009 to 2012,the effects of treatment were assessed.Results:Treatment with microsplint and circumferential wiring did not injure perma-nent teeth germ.It showed many features,such as easy reduction of fractured bone segments,stable fixation,without interfere with eat-ing and benefit of mouth clearness.Conclusion:Microsplin and cicumferential wiring is effective for the treatment of mandibular body fracture in children.
ABSTRACT
Subject(s)
Humans , Biopsy , Bone Transplantation , Connective Tissue , Durapatite , Fibroma , Fibroma, OssifyingABSTRACT
Mesenchymal chondrosarcoma is a rare malignant tumor of bone and soft tissue. This aggressive form of chondrosarcoma represents only 3% to 9% of all chondrosarcomas. This neoplasm is characterized by sheets or clusters of undifferentiated spindle or round cells surrounding discrete nodules of well-differentiated cartilage. We experienced a case of mesenchymal chondrosarcoma on mandibular body. Two years ago, the patient had been treated the intrabony cystic lesion on mandiblular left body. At that time, cartilage portion was not detected in the cystic specimen. Two years after cyst enucleation, the recurred large neoplasm in the mandibular left body was noted, and it was diagnosed as 4.5 cm sized mesenchymal chondrosarcoma. The mandibular tumor was widely resected and rigid-plate and cervical musculocutaneous flap were used for reconstruction of resected bone and soft tissues. No complications and recurrence were noted for 6 months postoperatively.