| Summary: | <p>Background: The success of the treatment using removable orthodontic appliance not only depends on the patient's willto use it but also on the operator's capability to design and to make an appropriate appliance that may be tolerated by the patient. In orthodontic clinic,the tag can be used in zigzagshape, however, the length of zigzag shaped tag in its construction, so far, is determined based on the taste of the operator and not yet considered efficient length to avoid reducing the elasticity of the plate on the pressure strength. This study is aimed to observe the difference of zigzagshaped tag length of orthodontic wire in acrylicplate on the pressure strength. Methods: 18 samples of acrylic plate, divided into 3 groups (G1:the length of the zigzagshaped tag in acrylicplate was 10 mm, G2: 12,5 mm, G3 : 15 mm ), with the thickness of 2 mm, 3 x 2,5 using negative casting for each plate, tags were put in line with the space of 1 cm and poured with acrylicresin mixture and subsequently pressed. After being hardened, the resin acrylicswere then taken out, softened, and polished. The measurement of pressure strength on the acrylic plate was conducted using Company UniversalTesting Machine 30 KNModel TM 133 Essom Limited.The data collected were tested using One way Anova (p=0,05),and LSDtest to observe the difference among the groups. Results: the result of the study showed no difference of pressure strength among the groups. The One way Anova demonstrated value of 0,715 (p>
|
|---|