OBJECTIVE: The purpose of this study was to investigate the relationship between menarche and cervical vertebral maturation. METHODS: Lateral cephalograms of 67 young korean girls within the range of 1 year before or after their menarche were gathered. The concavity of the cervical vertebrae base and the ratio of the base length to the 3rd and 4th cervical vertebrae anterior height were measured and analyzed. RESULTS: The mean measured values were as follows; concavity of the 3rd cervical vertebrae base: 1.27 (+/- 0.18) mm, concavity of the 4th cervical vertebrae base: 1.06 (+/- 0.15) mm, ratio of the base length to the 3rd cervical vertebrae anterior height: 0.73 (+/- 0.06) and ratio of the base length to the 4th cervical vertebrae anterior height: 0.70 (+/- 0.05). There was a significant increase in the ratio of the base length to the 3rd vertebrae anterior height and the base concavity of the 3rd and 4th cervical vertebrae during the period of 1 year before to 1 year after their menarche. CONCLUSIONS: These characteristics of the 3rd and 4th cervical vertebrae on the lateral cephalogram can provide useful clues on evaluating the growth stage.
Cervical Vertebrae ; Female ; Menarche ; Spine

Cervical Vertebrae/surgery* ; Drainage ; Humans

PURPOSE: This study was to investigate whether cervical vertebrae can be utilized in evaluating the growth of the maxilla. MATERIALS AND METHODS: Fifty one male patients took lateral cephalometric radiographs once in every two years from the age of 8 till 14. Measured parameters were the concavity depth at the lower border of the third and fourth cervical vertebrae, and three analytical maxillary dimensions. RESULTS: The analysis of the maxillary measurements and the concavity depth at the lower border of the cervical vertebrae in the lateral cephalometric radiographs showed that the measured parameters gradually increased as the patients aged. Moreover, while the parameters of the patients in age 8 and 10 did not show any correlation, those of the patients in age 12 and 14 definitely showed the correlations. CONCLUSION: Although certain correlations were seen in particular parameters, further researches and studies with various parameters and shorter age intervals are needed. The result of this study will help clinicians in making plans and evaluating the proposed treatment plans.
Aged ; Cervical Vertebrae ; Female ; Humans ; Male ; Maxilla

OBJECTIVE: Our purpose of this study is to compare insertion angles and screw lengths from Roy-Camille, Magerl, and our designed method for cervical lateral mass screw fixation in the Korean population by quantitative measurement of reformatted two dimensional (2D) computed tomography (CT) images. METHODS: We selected thirty Korean patients who were evaluated with thin section CT scans and reconstruction program to obtain reformatted 2D-CT images of the transversal plane passing the cranio-caudal angle using three different techniques. We measured the minimum angle to avoid vertebral artery (VA) injury, the ideal angle and depth for bicortical screwing of cervical lateral mass. Morphometric measurements of the lateral masses from C3-C7 were also taken. RESULTS: In all three techniques, the mean safety angles from the VA were less than 8 degrees and the necessary depth of the screw was about 14 mm for safety to the VA and for the bicortical purchase. In our designed technique, the mean beta angles of each level from C3 to C7 were 29.0, 29.8, 29.5, 26.3, and 23.9 degrees, respectively. CONCLUSION: Results of this study and data from the literature indicate that differences may exist between the Korean and Western people in the length and angle for ideal lateral mass screw fixation. In addition, our technique needs further cadaveric and clinical study for safety and efficacy for being performed as alternative method for cervical lateral mass fixation.
Cadaver ; Cervical Vertebrae ; Female ; Humans ; Vertebral Artery

The vertebral pedicle is an important structure used as an implant site for spinal instrumentation surgery. Since precise anatomical knowledge of lumbar pedicles in vivo is essential for risk - free surgery, we analyzed Korean vertebrae with radiologic imaging techniques. The authors analayzed 500 pedicles from L1 to L5 vertebrae with computerized tomograms (CT) and simple radiograms taken from patient free of vertebral abnormality. Five morphometric parameters: transverse pedicle width, transverse pedicle angle, sagittal pedicle width, sagittal pedicle angle depth to anterior cortex were measured. The transverse diameter and angle of pedicle increased gradually from L1 to L5, while the sagittal diameter and angle decreased from L1 to L5. The depth to anterior cortex from posterior elements was longer along the pedicle axis than along axis parallel to midline.
Axis, Cervical Vertebra ; Humans ; Lumbar Vertebrae* ; Spine

The authors describe a new technique for the reduction and wiring of atlanto-axial dislocation. More strong supporting effect has been achieved by double wiring of the posterior arch of the cervical vertebrae. Various techniques for the fixation of the atlanto-axial dislocation have been discussed.olved.
Cervical Vertebrae ; Dislocations* ; Female ; Odontoid Process*

OBJECTIVE: This study was undertaken to study pedicle morphology in Koreans to provide a reference guide in transpedicular screw fixation. METHODS: Pedicle measurements were obtained from 35 dried human lumbar columns(175 lumbar vertebrae). Anatomic evaluation was focused on pedicle transverse diameter, pedicle axis length and the distance from the pedicle axis point to the midline of the transverse process. Pedicle angle and vertebral body length also were measured. RESULT: In the transverse plan, pedicle diameter increased from L1(7.8mm) to L5(15.5mm). But in 20.0% of L1 and L2, its diameters was under 6.0mm. In the sagittal plan, it was not as constant and had similar diameter from L1 to L5. In the transverse plan, the pedicle angle increased from L1 to L5. But in the sagittal plan it decreased from L1 to L5. Also, the pedicle axis length did not show concordant change, but rather had similar length in lumbar vertebrae. In 15%, its length was under 45mm. CONCLUSION: These results suggest that using above 6mm diameter and 45mm length of screw for L1 and L2 can violate the pedicle and vertebrae. Above L4, the pedicle axis point was superior to the midline of the transverse process, below L4, it was inferior to the midline of the transverse process. This information may prove to be helpful when contemplating the placement of screws to the lumbar pedicles.
Axis, Cervical Vertebra ; Humans ; Lumbar Vertebrae* ; Spine

Cervical Vertebrae ; Humans ; Spinal Diseases ; diagnosis ; Surgeons

This study was undertaken to investigate the interrelationships between the degrees of skeletal maturity of cervical vertebrae and the hand-and-wrist in skeletal Class III malocclusions. In 185 skeletal Class III malocclusions (male 62, female 123) having the lateral cephalogram and hand-wrist radiogram which were taken on the same day, 6 skeletal maturity stages of cervical vertebrae were compared with 11 skeletal maturity indicators of the hand-and-wrist. On the basis of findings of this study, the following results were obtained: 1. The stages of cervical vertebral maturity are one of the methods possible to assess the individual maturity. 2. Mean ages of male and female were obtained in each cervical vertebral stage. 3. Cervical vertebral stages 1 and 2 are considered to the accelerative growth phase, cervical vertebral stages 3 and 4 are corresponded to the peak height velocity, and cervical vertebral stages 5 and 6 were observed to occur during the decelerative phase of growth after peak height velocity in both sexes. 4. In cervical vertebral stages 1, 2, 3, 4, and 5, the degrees of skeletal maturity of cervical vertebrae in males were more retarded than females. 5. There was the high correlation between the degrees of skeletal maturity of cervical vertebrae and hand-and-wrist.
Cervical Vertebrae* ; Female ; Humans ; Male ; Malocclusion*

In clinical orthodontics, it is significant to understand the stage of growth in a growing patient. In order to assess the skeletal maturity of the patients, the hand-wrist radiograph and the cervical vertebrae (Cervical Vertebrae Maturation Indicators: CVNII) was evaluated from the lateral cephalograph and the skeletal maturity determined from the hand-wrist X-ray, (Skeletal Maurity Indicators: SMI) taken on the same day in the same patients, and its interrelationship examined to come up with the following results: 1. The skeletal maturity evaluated from the hand-wrist radiograph and the maturation of the cervical vertebrae from the lateral cephalograph showed a significant interrelationship with each other. 2. In the evaluation of the skeletal maturity using the SNIT and CVMI, the CVMI 1 showed a siginificant correlation with SMI 1, 2, the CVMI 2 with SNIT 3, 4, CVMI 3 with SMI 6, 7, CVMI 4 with SMI 7, 8, CVMI 5 with 9, 10 and CVNII 6 with SMI 11. 3. When the morphological changes in the 2nd and 3rd cervical vertebrae were separately observed, it was seldom that the concavity appeared in the lower border of the 2nd cervical vertebra and at the same time not appear in the 3rd cervical vertebra (CVMI 2 : 10.38 %, CVMI 3 : 6.56 %) 4. In each of the skeletal maturation stage evaluated from the hand-wrist and the cervical vertebrae, the average age and its standard deviation in male and female patients appeared to have large differences among individuals. Skeletal maturation seemed to appear earlier for the girls than for the boys, and its termination 24 months faster for girls.
Cervical Vertebrae* ; Female ; Humans ; Male ; Orthodontics ; Spine