Comparative study of clinical application of titanium-nickel coil spring and elastic line torsion

Significant effects are reported below.

1 data and methods as a control group. In the experimental group, the titanium-nickel spiral closed-loop spring end was hung on the traction hook of the second permanent molar buccal tube and the other end was ligated on the distal wing of the cusp lock groove. In the control group, the elastic end was also hung on the middle of the middle hook of the first and the molar buccal tube, and the distal end of the cusp lock groove was ligated. Adjust the titanium-nickel coil spring and the elastic line so that both sides generate about 12 forces.

2 Results and discussion 1.1 Case selection 30 cases of bilateral and indirect extraction, owed patients, 1 13 cases, 17 females, the average age of 13.5 years to determine the patient's pointed anatomy is normal, periodontal tissue without abnormalities, double The length of the lateral cusp roots is similar. Take a full-thickness surface tomogram and take a record model.

1.2 treatment method using private quasi-wire bow correction technology, randomly selected side-by-side!

Titanium-nickel spiral closed-loop spring Huayang was produced by the Beijing Nonferrous Metal Research Institute of the experimental group. The elastic line of the same axis was placed on the opposite side of the dental arch. The results showed that the average moving distance of the group teeth was significantly greater than the elastic force during different afterburning times. The line group, and the two groups have the same (1) different, 2.1 clinical application, the average moving distance of the canine in the experimental group is 0.957. The average moving distance of the canine in the control group is 0.706. The two groups are extremely significant. The difference is 00 attached. The statistical results show that the effect of using the zirconia spiral spring to sharpen the teeth to the far side is obviously better than the effect of the elastic line pulling the teeth to the far side. Calling the film should be stunned 1 too set spiral spring, the two methods different time average moving distance 10, grouping number 1 4th week 8th week 12th week 16th week 20th week week 28th week elastic line There was a significant difference between the two groups. The authors believed that the elastic force generated by the titanium-nickel wire was faster than that of the elastic line in the spiral-toothed yellow-toothed cusp, which was faster than the elastic line. Two cut = ilB! WlWW0915 2.31 Titanium 涫 coil spring and elastic line of the sharpened teeth to the rear of the speed correction midline is not adjusted.

2.4 The application of the two groups is relatively clear. The self-cleaning effect of the patient using titanium-nickel coil spring is worse than that of the elastic line group. It is more difficult to clean the oral hygiene. Therefore, patients in the Chin-Ni spiral spring group should brush their teeth carefully, clean the mouth and keep the oral environment. health.

In the literature, 3 cases of tachycardia were transmitted by bypass. Analysis of Lin Xiaojie, Ci Xiao, Wang Renfu, Zhao Xiuxiang, Department of Cardiology, Jixi People's Hospital, Heilongjiang Jixi, 158,100 males, 49 years old. Rheumatic heart disease, atrial fibrillation, ECG is arrhythmia, uniform rate, 9 is wide and narrow, the widened wave appears continuously in the left bundle branch block shape, after a longer 1 has normal chopping, wide The degree of sputum is not the same, but the initial part and the rising branch of 1 26 have obvious pre-shock, the shortest 1 is 220, 1 is the atrial fibrillation combined with the difference, which is considered to be the deficiency of digitalis, and it is given to the Westland 0.4. The width is increased, and careful analysis is performed before the bypass of the tremor bypass. Give the heart rhythm flat 40 points and then push the wide old to a narrow old atrial fibrillation.

Male, 9 years old. The electrocardiogram is wide, the tachycardia is left-beam cross-blocking shape, the heart rhythm is regular, the chamber rate is 25 times, and the 1 is 6-shaped 6 is large 8-shaped. The initial part and the ascending branch can be pre-shock, wave Inverted disc 1 standing, the ratio of slaughtering room 1 and left bundle branch block, static push of Westland and verapamil are invalid, the analysis is the former refractory tachycardia in the lake before the road, and the heart is pushed; Right bundle branch block shape of tachycardia, rhythm regulation, room rate 120 points, 1 is a general shape, is a type, 1 wave slightly less than 3 waves, not obvious, wave, consider the atrioventricular node anterior chamber reentry Type tachycardia with bypass ipsilateral bundle branch right bundle branch block, 3 after conversion to sinus rhythm, pre-shock, 1 is 6-shaped, 6 is pressed; shape, 1 is 93-shaped, analytical bypass Located on the right rear free wall.

Example 3, male, 55 years old. Coronary heart disease for 5 years, pain in the back of the chest! Admitted to the hospital, the heart is now over-speed tachycardia, the ventricular rate is irregular, the right bundle is attached with a stagnation shape, 1 large shape, 1 shape, and human form. Short seven only 200. Pre-shock, pre-shock, 3+ segment elevation 131 segment down, 矜 is considered to be a total inferior myocardial infarction. 31 self-return to sinus rhythm 1 is a shape, 5 is a large 8 shape, pre-shock 1 can be reversed, two-way, up, correction is diagnosed as paroxysmal atrial fibrillation by bypass, the bypass is located on the left posterior wall .

100 secret heart beats, including the ventricular tachycardia; speed combined with the original side bundle branch block 3 room upper speed with differential indoor conduction subventricular arrhythmia tachycardia atrial fibrillation or atrial flutter, the room The chamber is bypassed. From the treatment of 3 cases of wide tachycardia by bypass, the examination and lessons are worthy of deep thinking. 1 should be carefully analyzed when the tachycardia episodes of seizures should be carefully analyzed, and use 8 soil to propose a differential diagnosis scheme to try to distinguish Ventricular speed or room speed. In all 12-room relationships, the tachycardia, regardless of its shape, and the width of the tachycardia should be considered, the possibility of participating in the tachycardia or on-the-job And to affirm or deny, ECG can get some useful clues. Irregular wide-period tachycardia, with normal or intermediate-type worms in the front, and atrial fibrillation accompanied by dominant forward conduction. The wide wave shape has large variations and can be pre-shocked. After the bypass is passed forward. Pre-existing 6 electrocardiographic dilation-type support bypass diagnosis. When the tachycardia of Kuanyang is changed to 3 times, the symptoms of angina may occur when combined with coronary heart disease. Do not easily diagnose acute myocardial infarction. But it can also exist with acute myocardial infarction, pay attention to distinguish and diagnose, pre-excitation syndrome can be similar to acute myocardial infarction. When the identification is unclear, the drugs that accelerate the bypass pre-transmission can not be used, such as the diarrhea, etc., so that the risk of the high-risk patients is aggravated, and the heart rhythm or amiodarone can be slowed down to reduce the bypass heart rhythm or The electric shock turns to the heart rhythm.