Sains Malaysiana 42(1)(2013):
99–105
Lactate Dehydrogenase Activity During Tooth Movement under
1.0 N and 1.5 N Continuous Force Applications
(Aktiviti Laktat Dehidrogenase Semasa Pergerakan Gigi dengan
Aplikasi Tekanan 1.0 N dan 1.5 N Secara Berterusan)
Shahrul Hisham Zainal Ariffin & Nurfathiha Abu Kasim
School of Bioscience and Biotechnology, Faculty of Science
and Technology
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D.E. Malaysia
Rohaya Megat Abdul Wahab*
Department of Orthodontics, Faculty of Dentistry, Universiti
Kebangsaan Malaysia
50300 Kuala Lumpur, Malaysia
Abdul Aziz Jemain
DELTA, School of Mathematics, Faculty of Science and
Technology
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D.E.Malaysia
Diserahkan: 19 Disember 2011 / Diterima: 10 Julai 2012
ABSTRACT
The aim of this study was to observe the pattern of lactate
dehydrogenase (LDH) activity in GCF and the rate of tooth
movement at two different orthodontic forces (1.0 N and 1.5 N). Twelve subjects
participated in this study and was chosen based on the inclusion criteria. Each
subject received forces of 1.0 N and 1.5 N for tooth movement either on the
left or right side of the maxillary canine. GCF sample was collected
at mesial and distal sites of the canines before applying the appliance (week
0) and every week for 5 weeks after tooth movement (week 1 to week 5) where
baseline activity served as control. LDH activity was assayed spectrophotometically
at 340 nm. The tooth movements were measured from casted study models. LDH specific
activity at mesial sites in 1.0 N and 1.5 N force groups, respectively
increased significantly (p<0.05)
only on week four and throughout the treatment when compared with baseline. At
distal sites, LDH specific activity with 1.5 N was higher than 1.0 N throughout the
five weeks of tooth movement. LDH specific activity with 1.5 N force
increased at both mesial (week 2) and distal sites (week 3) with significant
different (p<0.05) when compared with 1.0 N force. Tooth movement
with 1.5 N showed significantly faster (p<0.05) at the end of week 5
when compared with 1.0 N. LDH has the potential as a biological marker
of inflammation during tooth movement.A force of 1 N was more suitable to be
used although less tooth movement was produced because less inflammation caused
by the force can be useful in orthodontic treatment for patients with
stabilised periodontal diseases compared with 1.5 N force.
Keywords: Biological marker; inflammation; lactate dehydrogenase;
orthodontic force; tooth movement
ABSTRAK
Kajian ini bertujuan untuk melihat corak aktiviti laktat
dehidrogenase (LDH) di dalam GCF dan kadar pergerakan gigi pada dua daya tekanan ortodontik yang
berbeza (1.0 N dan 1.5 N). Dua belas orang subjek telah
mengambil bahagian dalam kajian ini dan mereka dipilih berdasarkan beberapa
kriteria yang telah ditetapkan. Setiap subjek menerima 1.0 N dan 1.5 N
daya tekanan untuk pergerakan gigi sama ada pada
bahagian kanan atau kiri gigi taring maksila. Sampel GCF dikumpul dari
bahagian mesial dan distal gigi taring sebelum dipakaikan pendakap gigi (minggu
0) dan setiap minggu untuk lima minggu selepas gigi
digerakkan (minggu 1 hingga minggu 5) dengan aktiviti basal dijadikan sebagai
kawalan. Aktiviti LDH diasai menggunakan pendekatan
spektrofotometri pada 340 nm. Pergerakan gigi diukur daripada
model-model kajian yang telah dibentuk. Aktiviti spesifik LDH pada bahagian mesial
dalam kumpulan tekanan 1.0 N dan 1.5 N masing-masing meningkat secara
signifikan (p<0.05) hanya pada
minggu 4 dan sepanjang rawatan berbanding kawalan. Pada bahagian distal,
aktiviti spesifik LDH dengan 1.5 N adalah lebih tinggi
berbanding 1.0 N sepanjang lima minggu pergerakan
gigi. Aktiviti spesifik LDH dengan tekanan 1.5 N meningkat (p<0.05)
pada kedua-dua bahagian mesial (minggu 2) dan distal (minggu 3) berbanding
tekanan 1.0 N. Pergerakan gigi dengan 1.5 N lebih pantas (p<0.05)
pada akhir minggu 5 berbanding dengan 1.0 N. LDH berpotensi sebagai
penanda biologi untuk inflamasi semasa pergerakan gigi. Daya tekanan 1.0 N
berbanding 1.5 N lebih sesuai digunakan walaupun ia menghasilkan kurang pergerakan gigi kerana penghasilan inflamasi yang rendah
adalah penting dalam rawatan ortodontik kepada pesakit periodontal yang telah
stabil.
Kata kunci: Inflamasi; laktat dehidrogenase;
penanda biologi; pergerakan gigi; tekanan ortodontik
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*Pengarang
untuk surat-menyurat; email: shahroy7@gmail.com
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