Perbandingan penurunan kekuatan tekan Open Coil Spring nikel titanium antara ukuran Lumen 0,030 dan 0,036 inci diameter kawat 0,010 inci :: Penelitian eksperimental laboratories

SUPRANOTO, Hadi, drg. Hj. Kuswahyuning S., Sp.Ort(K)

2007 | Tesis | PPDGS I Ilmu Ortodonsia

Penelitian ini bertujuan untuk mengetahui perbandingan penurunan kekuatan tekan open coil spring Nikel Titanium antara ukuran lumen 0,030 inci dan 0,036 inci diameter kawat 0,010 inci. Subyek penelitian terdiri dari 60 sampel open coil spring Nikel Titanium dengan panjang 12 mm. Seluruh subyek penelitian dibagi 2 kelompok, kelompok A terdiri dari 30 sampel open coil spring Nikel Titanium dengan ukuran lumen 0,030 inci dan kelompok B terdiri dari 30 sampel open coil spring Nikel Titanium dengan ukuran lumen 0,036 inci. Pengukuran kekuatan tekan awal dilakukan pada seluruh kedua kelompok subyek penelitian, kemudian dilakukan penekanan (compresion) secara bersama-sama dengan alat yang telah didisain sedemikian rupa, sehingga dapat memfiksasi subyek penelitian sebelum dibuka untuk dilakukan pengukuran kembali pada minggu ke III dan ke IV. Pengukuran kekuatan tekan pada penelitian ini dilakukan dengan alat Tensile Testing Machine buatan Panke Person Equipment yang dilengkapi dial indicator. Untuk mengetahui ada tidaknya perbedaan penurunan kekuatan tekan antara kelompok A dan kelompok B dilakukan uji statistik Analisis Variansi dua jalur. Pada uji statistik Analisa Variansi dua jalur didapatkan hasil bahwa terdapat perbedaan yang bermakna (p<0,05) pada penurunan kekuatan tekan antara open coil spring Nikel Titanium diameter lumen 0,030 inci dan 0,036 inci diameter kawat 0,010 inci pada pengukuran awal dengan pengukuran minggu ke III maupun pada pengukuran awal dengan pengukuran minggu ke IV.

It was the purpose of this research to know the comparison of Nickel Titanium open coil springs stress force decrease between 0.030 inch and 0.036 inch lumen size with 0.010 inch wire diameter. This research subjects consisted of 60 Nickel Titanium open coil springs samples with 12 mm length. All of the subjects of this research were divided into 2 groups, group A consisted of 30 Nickel Titanium open coil springs samples with 0.030 inch lumen size and group B consisted of 30 Nickel Titanium open coil springs samples with 0.036 inch lumen size. Initial stress force measurement was carried out to all of both groups of the research subject, then compression was carried out together with an instrument which has been specially designed, so that it could fix the research subjects before being opened for being carried out measurements again on week III and week IV. The stress force measurements on this research were carried out with Panke Person Tensile Testing Machine which was completed with dial indicator. 2 Ways Varian Analysis Statistic Test was carried out to know there was a stress force decrease difference or not between group A and group B. On 2 Ways Varian Analysis Statistic Test was found a result that there was a significantly difference (p<0.05) on stress force decrease between 0.030 inch and 0.036 inch lumen size of Nickel Titanium open coil spring with 0.010 inch wire diameter either on initial measurement with measurement on week III or on initial measurement with measurement on week IV.

Kata Kunci : Perawatan Ortodontik,Open Coil Spring,Nikel Titanium,Ukuran Lumen