Pengaruh Implantasi Subkutan Logam Kobalt Kromium Sebagai Bahan Alternatif Mini Screw Orthodontics Terhadap Reaksi Jaringan Kelinci Albino

Mini screw orthodontics merupakan alat yang digunakan dalam perawatan ortodonsia untuk kasus yang membutuhkan absolute anchorage. Mini screw yang tersedia terbuat dari logam nikel titanium atau stainless steel yang pada beberapa pasien menyebabkan reaksi pada jaringan. Uji implantasi adalah uji yang dilakukan untuk menentukan biokompatibilitas medical device yang berkontak langsung dengan jaringan hidup. Respon jaringan terhadap jejas pasca implantasimempengaruhi derajat pembentukan jaringan granulasi, reaksi benda asing, dan fibrosis. Penelitian ini bertujuan untuk mengetahui efek lokal implantasi kobalt kromium sebagai alternatif bahan mini screw orthodontics terhadap jaringan subkutan kelinci albino. Subjek penelitian berupa 20 ekor kelinci jantan albino yang digunakan untuk 2 kelompok(perlakuan dan kontrol negatif). Kobalt kromium dibuat lempengan diameter 10 mm dan ketebalan 1 mm. Pada kelompok perlakuan, material diimplankan pada jaringan subkutan dorsum kelinci dengan insisi sampai terbentuk poket subkutan, dasar poket tidak lebih dari 10 mm dari garis awal insisi dan dilakukan suturing. Kelompok kontrol hanya dilakukanincisi kemudian disuturing. Secara makroskopis 24 jam pasca implantasi, daerah implan diamati terjadinya edema, hematoma, enkapsulasi dan tanda-tanda inflamasi. Evaluasi secara mikroskopis pada hari ke 14 pasca implantasi, diamati Perubahan histopatologis infiltrasi sel-sel inflamasi, kemudian rerata hasil diuji dengan uji independent samplet-test untuk mengetahui apakah ada perbedaan jumlah sel-sel inflamasi pada kelompok perlakuan dan kontrol. Hasil pengamatan makroskopis, kelompok perlakuan maupun kontrol hanya terlihat tanda inflamasi ringan berupa eritema. Rerata dan Simpangan baku jumlah PMN, limfosit, sel plasma, makrofag, giant cell, neovaskularisasi, fibrosis kobalt kromium dan kontrol berturut turut yaitu (0,6 ± 0,49; 0,7 ± 0,48); (0,9 ± 0,87; 1,0 ± 0,67); (0,6 ± 0,24; 0,6 ± 0,21); (1,4 ± 0,84; 0,9 ± 0,74); (0,5 ± 0,27; 0); (0,6 ± 0,33; 0,7 ± 0,48); (0,5 ± 0,27; 0,1 ± 0,02). Hasil t-test menunjukkan perbedaan yang tidak signifikan (p>0,05) pada 6 parameter inflamasi sedangkan parameter giant cell menunjukkan perbedaan yang signifikan (p0.05). The conclusion of this study is that the cobalt chromium alloy can affect the subcutaneous tissue by inducing giant cell infiltration on day 14 post-implantation as the result of foreign body reactions

Levels of Tumor Necrosis Factor-α (TNF-α) and Transforming Growth Factor-β1 (TGF-β1) in Gingival Crevicular Fluid during Canine Retraction Using Elastic Chain and Closed Coil Spring Open Access

Introduction: To investigate the levels of human tumor necrosis factor-α (TNF-α) and transforming growth factor β1 (TGF-β1) in gingival crevicular fluid (GCF) during canine retraction movement using elastic chains and closed coil springs. Materials and Methods: One hundred patients (49 men and 51 women; mean age, 23.6 years) entering the space closure phase of fixed orthodontic treatment participated in this research. An upper canine of each patient was retracted using an elastic chain, and the contralateral canine was retracted using a closed coil spring. GCF samples were collected from the canine before and 7 days after the force was applied. human TNF-α and TGF-β1 were determined by enzyme-linked immunosorbent assay. Results: There were significant increase in the concentrations of both TNF-α and TGF-β1 at 7 days in both groups (P < 0.05). In the evaluation of between-group differences, significantly higher values were determined in the closed coil spring group. Conclusions: The results suggest that closed coil springs give higher TNF-α and TGF-β1 concentrations as compared to elastic chains, which make more bone remodeling to occur; therefore, closed coil springs can be considered as the treatment of choice for orthodontic canine retraction. © 2018 Medknow Publications. All rights reserved

Levels of Tumor Necrosis Factor-α (TNF-α) and Transforming Growth Factor-β1 (TGF-β1) in Gingival Crevicular Fluid During Canine Retraction Using Elastic Chain and Closed Coil Spring

Introduction: To investigate the levels of human tumor necrosis factor-α (TNF-α) and transforming growth factor β1 (TGF-β1) in gingival crevicular fluid (GCF) during canine retraction movement using elastic chains and closed coil springs. Materials and Methods: One hundred patients (49 men and 51 women; mean age, 23.6 years) entering the space closure phase of fixed orthodontic treatment participated in this research. An upper canine of each patient was retracted using an elastic chain, and the contralateral canine was retracted using a closed coil spring. GCF samples were collected from the canine before and 7 days after the force was applied. human TNF-α and TGF-β1 were determined by enzyme-linked immunosorbent assay. Results: There were significant increase in the concentrations of both TNF-α and TGF-β1 at 7 days in both groups (P < 0.05). In the evaluation of between-group differences, significantly higher values were determined in the closed coil spring group. Conclusions: The results suggest that closed coil springs give higher TNF-α and TGF-β1 concentrations as compared to elastic chains, which make more bone remodeling to occur; therefore, closed coil springs can be considered as the treatment of choice for orthodontic canine retraction