The commonly used examination procedures of the upper cervical spine depend upon the symmetry for comparison and interpretation of joint functions. If symmetry is not normal, then these assessments may mislead the examiners, allowing them implementation of incorrect treatment plans. Objectives of this study are to explore the possibility that asymmetry is more common than symmetry and, if it is true, to find out the effects of asymmetry on the biomechanics of these joints. The study was carried out on 30 atlas vertebrae of cadavers of Indian origin. The different intra-atlas distances were measured on both sides by digital vernier calliper. All the parameters studied showed statistically significant differences between the right and left side i.e. a p value of < 0.05. The anteroposterior diameter of the foramen transversarium, the transverse diameter of the foramen transversarium, the distance from the midline to medial edge of the vertebral artery groove (inner as well as outer cortex) and the length of the superior articular facets were more on the right side as compared to the left side. The breadth as well as the length of the inferior articular facet, the breadth of the superior articular facet and the difference of posterior arch thickness at the site of vertebral artery groove were more on the left side as compared to the right side. These differences may be explained by the handedness of an individual, which influences the intra-osteal asymmetry in a characteristically distinct manner, which needs to be confirmed or refuted in a further study.
Cervical Atlas

By spectrometry, in 78 patients with uterine servical cancer and a control group of 45 healthy person, the activity of erythrocyte antioxidant enzymes and plasma total antioxidant was determined. Results showed a significant decrease of SOD enzyme and blood red cell GPX in cervical cancer patients versus that of the controls. There is a light decrease of total antioxidant state of plasma in patients with cervical cancer versus the controls, and of Hb level in patients with cervical cancer versus the controls. The results suggests a relation between the activity of antioxidant enzyme in cervical cancer patients and DNA damage due to oxygene stress
Uterine Cervical Neoplasms ; Uterine Cervical Diseases ; Patients

PURPOSE: To evaluate the clinical usefulness and its own characteristic of Seohan computerized 85-hue test(SCHT-85) which was developed by authors. METHODS: SCHT-85 was performed in 89 normal subjects and 41 subjects with color defects diagnosed by Hardy-Rand-Rittler test(HRR test) and Farnsworth Munsell 100-hue test(FM 100-hue test) and total error scores(TES) according to the age in normal subjects and TES and central cap in subjects with color defects were determined. RESULTS: In normal subjects, TES of SCHT-85 according to the age were slightly higher than those of FM 100-hue test and highly correlated with those of FM 100-hue test. TES of SCHT-85 were increased according to the degree of abnormality in the HRR test in subjects with color defects. TES of SCHT-85 were lower than those of FM 100-hue test in normal subjects and higher than those of FM 100-hue test in subjects with color defects. In subjects with color defects, the central cap of SCHT-80 showed the tendency to yellowgreen-purple axis in protan and green-bluepurple axis in deutan compared to that of FM 100-hue test. CONCLUSIONS: SCHT-85 is highly correlated with FM 100-hue test and seems to be more useful to differentiate normal subjects and subjects with color defects than FM 100-hue test.
Axis, Cervical Vertebra

No abstract available.
Cervical Ripening* ; Female ; Pregnancy

No abstract available.
Uterine Cervical Neoplasms*

No abstract available.
Axis, Cervical Vertebra

PURPOSE: The accurate dosimerty of independent collimator equipped for 6MV and 15MV X-ray beam was investigated to search for the optimal correction factor. METHODS AND MATERIALS: The field size factors, beam quality and dose distribution were measured by using 6MV, 15MV X-ray. Field size factors were measured from 3X3cm2 to 35X35cm2 by using 0.6cc ion chamber (NE 2571) at Dmax. Beam qualities were measured at different field sizes, off-axis distances and depths. Isodose distributions at different off-axis distance using 10X10cm field were also investigated and compared with symmetric field. RESULTS: 1) Relative field size factors was different along lateral distance with maximum changes in 3.1% for 6MV and 5% for 15MV. But the field size factors of asymmetric fields were identical to the modified central-axis values in symmetric fileld, which corrected by off-axis ratio at Dmax.2) The HVL and PDD was decreased by increasing off-axis distance. PDD was also decreased by increasing depth For field size more than 5X5cm2 and depth less than 15cm, PDD of asymmetric field differs from that of symmetric one (0.5~2% for 6MV and 0.4~1.4% for 15MV).3) The measured isodose curves demonstrate divergence effects and reduced doses adjacent to the edge close to the flattening filter center was also observed. CONCLUSION: When asymmetric collimator is used, calcutation of MU must be corrected with off-axis and PDD with a caution of underdose in central axis.
Axis, Cervical Vertebra ; Jaw*

No abstract available.
Uterine Cervical Neoplasms*

No abstract available.
Humans ; Uterine Cervical Neoplasms*

PURPOSE: The aim of the present study was to evaluate the accuracy of three techniques for correction of cast implant bars. MATERIALS AND METHODS: Thirty cast implant bars were fabricated on a metal master model. All cast implant bars were sectioned at 5 mm from the left gold cylinder using a disk of 0.3 mm thickness, and then each group of ten specimens was corrected by gas-air torch soldering, laser welding, and additional casting technique. Three dimensional evaluation including horizontal, vertical, and twisting measurements was based on measurement and comparison of (1) gap distances of the right abutment replica-gold cylinder interface at buccal, distal, lingual side, (2) changes of bar length, and (3) axis angle changes of the right gold cylinders at the step of the post-correction measurements on the three groups with a contact and non-contact coordinate measuring machine. One-way analysis of variance (ANOVA) and paired t-test were performed at the significance level of 5%. RESULTS: Gap distances of the cast implant bars after correction procedure showed no statistically significant difference among groups. Changes in bar length between pre-casting and post-correction measurement were statistically significance among groups. Axis angle changes of the right gold cylinders were not statistically significance among groups. CONCLUSION: There was no statistical significance among three techniques in horizontal, vertical and axial errors. But, gas-air torch soldering technique showed the most consistent and accurate trend in the correction of implant bar error. However, Laser welding technique, showed a large mean and standard deviation in vertical and twisting measurement and might be technique-sensitive method.
Axis, Cervical Vertebra ; Welding