Original Article

Kajiansudut inklinasi gigi molar ketiga rahangbawahpre-erupsi pada kelompok umur14 -17 tahun(The pre-eruptedstudyof mandibular thirdmolar inclinationamong 14 to 17 year old)

Nurlailia DS , Mei Syafriadi

Nurlailia DS
Bagian Bedah Mulut Fakultas Kedokteran Gigi, Universitas Jember Jember, Indonesia. Email: mei_syafriadi@hotmail.com

Mei Syafriadi
Bagian Biomedik Fakultas Kedokteran Gigi, Universitas Jember Jember, Indonesia
Online First: June 30, 2014 | Cite this Article
DS, N., Syafriadi, M. 2014. Kajiansudut inklinasi gigi molar ketiga rahangbawahpre-erupsi pada kelompok umur14 -17 tahun(The pre-eruptedstudyof mandibular thirdmolar inclinationamong 14 to 17 year old). Journal of Dentomaxillofacial Science 13(2): 95-100. DOI:10.15562/jdmfs.v13i2.396


At the beginning of the growth, tooth inclination is mesioangular, then move gradually to come into contact with the
distal surface of the second molar and further commit to sliding movement parallel to second molar axis. This position
will be retained to achieve the eruption way to oral cavity. However, the last decade reported incidence increased
impaction of the third molar teeth in the lower jaw. This study was aimed to study the level of pre-eruption of mandibular
third molar in the population group aged 14-17 years to predict the risk of tooth impaction or not. Differentiated
populations on cluster I, age 14-15 years old; group II, 15.1-16 years old; and group III 16.1-17 years old. Research
carried out by clinical observation and measurement of at Department of Radiology in Jember University with 48
people selected based on predetermined criteria. X-ray projection was exposed by paralleling technique on the lower
third molar teeth, left and right. The results showed 43.75% of 14-15 year old group had the third molar angle interval
50-56°; 15.1-16 year age group, 80% have 57-70° angle interval, and 16.1-17 years age group, 46.67% has angular
interval 64-70°. It was concluded that a large interval of the third molar angle increase due to the increased of age,
and the angle is different between groups based on gender.

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