Section 46
Chapter 45,591

Comparison of closing T loop technique and sliding technique using preadjusted appliance

Yang, X.; Zeng, X.

Zhonghua Kou Qiang Yi Xue Za Zhi 34(6): 370-372


ISSN/ISBN: 1002-0098
PMID: 11776883
Accession: 045590878

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To compare the difference between closing T loop technique and sliding technique. In anchorage demand and treatment outcome. Sixteen first premolar extraction cases were chosen and divided into two groups for prospective paired t-test. They were treated by one author using 0.022" x 0.028" preadjusted appliances. T loops were fabricated using 0.018" x 0.025" s.s. wire. Chinese NiTi coil springs and 0.019" x 0.025" s.s. arch wire were employed in sliding technique group. Treatment materials, steps and appliance design in both groups were standardized. Measurements of dental model and cephalogram were taken. In closing T loop technique group and sliding technique group, the ratio of anterior teeth movement was 0.55 and 0.53 respectively. The difference was not significant (P > 0.05). L1MP angle decreased by 5.7 degrees and 3.1 degrees respectively during treatment (P < 0.05). Demand on anchorage was not significantly different between two groups. Sliding technique was more favorable in maintaining anterior teeth inclination.

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