External Marker in Bisecting-Angle-Technique: A New Approach to Minimize Dental Radiographic Error
External Marker in Bisecting-Angle-Technique
Abstract
Bisecting-angle-technique is a method used to improve patient comfort during
periapical radiography. This technique is usually performed without X-ray beam aiming device and has been commonly associated with dental radiographic error.
The use of external marker as a beam aiming device in bisecting-angle-technique
is potentially effective to reduce the number of errors occurring during periapical radiography. In this study, 240 periapical radiographs were taken by undergraduate dental students. Periapical radiographs were taken using traditional method of bisecting-angle-technique (BAT), bisecting-angle-technique with the use of external marker (BAT-M) and the standard method in periapical radiography; paralleling technique (PT). All radiographic images were evaluated and errors were classified and tabled according to the type and number of errors. Chi-square test was used to compare the total number of radiographic errors made using these three techniques. One of the most common errors with BAT was cone cut error (13.8%). This error had been markedly reduced to 1.3% and 2.5% by implementation of BAT-M and PT, respectively. The total number of errors was also found to be significantly lesser for BAT-M compared to BAT, p< 0.05.
Keywords :
dental,
errors,
radiography,
Abstrak
Teknik ‘bisecting-angle’ merupakan satu kaedah yang digunakan bagi menambah baik keselesaan pesakit semasa radiografi periapikal. Kebiasaannya, teknik ini dilakukan tanpa menggunakan alat sasaran sinar-X dan sering kali mengakibatkan ralat pada radiograf pergigian. Penggunaan penanda luaran sebagai alat bantuan bagi mensasarkan sinar-X di dalam teknik ‘bisecting-angle’ adalah berpotensi bagi mengurangkan ralat radiograf berkenaan. Dalam kajian ini, 240 radiograf periapikal diambil oleh pelajar sarjana muda pergigian dengan menggunakan 3 jenis teknik radiograf periapikal. Teknik-teknik ini adalah teknik ‘bisecting-angle’ (BAT), teknik ‘bisecting-angle’ dengan menggunakan penanda luaran (BAT-M) dan teknik ‘paralleling’ (PT). Setiap radiograf yang diambil, seterusnya dinilai dan ralat yang terdapat pada radiograf diklasifikasikan dan dijadualkan mengikut jenis dan bilangan ralat radiograf yang berlaku. Analisis statistik yang lebih terperinci turut dilakukan bagi membandingkan jumlah bilangan ralat radiograf yang melibatkan ketiga-tiga teknik berkenaan. Keputusan kajian menunjukkan salah satu ralat radiograf yang sering terjadi dengan BAT adalah ralat potongan kon (13.8%). Ralat ini didapati berkurangan kepada 1.3% dan 2.5% dengan pelaksanaan BAT-M dan PT, masing-masing. Jumlah keseluruhan ralat radiograf juga didapati jauh lebih kecil dengan BAT- M berbanding BAT, p <0.05.
Kata Kunci :
pergigian,
radiografi,
ralat,
Correspondance Address
Azizah Ahmad Fauzi. Department of Clinical Oral Biology, Faculty of Dentistry, UniversitiKebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia. Tel: +603-92897888 Fax: +603-26982944 E-mail: azizah_fauzi@ukm.edu.my
