The results showed that the adhesive with average tensile bond strength more than 7 MPa featured no mix, plenty of working time and enough initialand durable bond strength,which was especially suitable for direct bonding of more orthodontic appliances.
Methods: The sample consisted of 172 cases,which were divided into 12—17y and 18—22y group,each group consisting of test group and control group,Gingival index(GI) was recorded for each individual patient,before fixed orthodontic appliances were inserted and the sixth month after insertion.
OBJECTIVETo observe changes of clinical parameters and biochemical ingredients in gingival crevicular fluid (GCF) in adolescents with fixed orthodontic appliances and evaluate the effects of the fixed orthodontic appliances to the health of the periodontal tissues.
In 12—17y group,the test group had significant lower GI than that in control group; In 18—22y group,there was no significance difference between the test group and control group,P>0.05.Conclusion: The pilot study suggests that oral health care allowed for favorable treatment responses in gingivitis patients with fixed orthodontic appliances.
This force-asymmetry causes lengthening of treatment and frequent visits for fine-tuning of the orthodontic appliances.
Treatment of long-standing chronic enuresis by orthodontic appliances could be used more frequently to give relief to those not responding to conventional treatment.
Effect of an antibacterial varnish on lactic acid production in plaque adjacent to fixed orthodontic appliances
The results suggest that fluoride varnish treatments resulted in elevated fluoride levels in plaque adjacent to fixed orthodontic appliances for a period of up to 1 week, although different patterns was disclosed for the various brands.
Thirty adolescents (12-17 years) with fixed orthodontic appliances were randomly assigned to one of three groups: Bifluoride (6% F), Duraphat (2.23% F) and Fluor Protector (0.1% F).
By applying MBTR-1 dynamometer the deformative force of various labial arehcs and springs made of stainless steel wire and nickel- titanium wire was determined.It proved that the deformative force of nickel-titanium wire was about 1-5 times lower than that of the stainless steel wire.It also suggested that 3 reqirements should be futfilled for the orthodontists to select the suitable kind of wire during designing an orthodontic appliance,
The purpose of this study was to ob- serve the effect of EBC iontophoresis on increasing the rate of tooth movement in rabbits. 21 rabbits, in whose lower incisors the standard orthodontic appliances were placed, were divided into 3 groups at random which separately received iontophoresis of EBC, iontophe esis and injection of physiological saline at the sub-mucosal area of the lower incisors. The results showed that the animals with EBC iontophoresis obtained tooth movement rate of 4. 275 ±0. 1214 (mm)...
The purpose of this study was to ob- serve the effect of EBC iontophoresis on increasing the rate of tooth movement in rabbits. 21 rabbits, in whose lower incisors the standard orthodontic appliances were placed, were divided into 3 groups at random which separately received iontophoresis of EBC, iontophe esis and injection of physiological saline at the sub-mucosal area of the lower incisors. The results showed that the animals with EBC iontophoresis obtained tooth movement rate of 4. 275 ±0. 1214 (mm) and the animals with NaCl iontophoresis and injection were respectively 3. 337 ± 0. 4626 (mm) and 2. 178±0. 2922 (mm). The histologi-cal observation had also found the evidence of the ability of EBC to stimulate osteo-clasts in preiodontal pression side and os-teoblasts in tension. This study suggested that iontophoresis of EBC could play an important role in reconstructing the peri-odontum and speeding the tooth movement in rabbits.
This paper reported that acceleration of tooth movement can be gaind by submucosal injection of some kind of medicine. To avoid the pain caused by the injection,conventional drug administration was ameliorated in this study by adopting the method of iontophoresis rabbits were divided into 2 groups and the standard orthodontic appliances were placed in the lower incisors of all animals. The 2 groups were separately recieved submucosal iontophoresis and injection of 0. 9% Nacl which served as control. The...
This paper reported that acceleration of tooth movement can be gaind by submucosal injection of some kind of medicine. To avoid the pain caused by the injection,conventional drug administration was ameliorated in this study by adopting the method of iontophoresis rabbits were divided into 2 groups and the standard orthodontic appliances were placed in the lower incisors of all animals. The 2 groups were separately recieved submucosal iontophoresis and injection of 0. 9% Nacl which served as control. The result showed that animals with iontophoresis,in whose pe-riodontal pression side more osteoclasts were observed histologically, had gained rapider tooth movement than those with injections.
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