Sains Malaysiana 48(4)(2019): 823–830

http://dx.doi.org/10.17576/jsm-2019-4804-14

 

Penentuan Umur Manusia menggunakan Rongga Pulpa Gigi Pramolar Pertama melalui Pendekatan Cameriere

(Human Age Estimation using First Premolar Dental Pulp Cavity via Cameriere's Approach)

 

RUS DINA RUS DIN¹, SITI NUR ZAHIDAH ZAHARI², ROHAYA MEGAT ABDUL WAHAB³, ZAIDAH ZAINAL ARIFFIN⁴, LIEW YI YING² & SHAHRUL HISHAM ZAINAL ARIFFIN²*

 

¹Pusat Sains Kesihatan dan Gunaan, Fakulti Sains Kesihatan, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Wilayah Persekutuan, Malaysia

 

²Pusat Bioteknologi dan Makanan Berfungsi, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

³Unit Ortodontik, Pusat Kesihatan Pergigian Keluarga, Fakulti Pergigian, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Wilayah Persekutuan, Malaysia

 

⁴Pusat Pengajian Biologi, Fakulti Sains Gunaan, Universiti Teknologi MARA, 40450 UiTM Shah Alam, Selangor Darul Ehsan, Malaysia

 

Received: 24 May 2018/Accepted: 16 January 2019

 

ABSTRAK

Pemendapan dentin sekunder akan menyebabkan pengecilan rongga pulpa gigi selari dengan peningkatan umur seseorang. Tujuan kajian ini dijalankan adalah untuk mengetahui hubungan antara saiz rongga pulpa gigi dengan umur individu menggunakan nisbah kawasan pulpa/kawasan gigi (PTR) berdasarkan pendekatan Cameriere pada populasi Malaysia. Kajian ini melibatkan sebanyak 168 sampel gigi; 136 sampel untuk menjana formula manakala 32 sampel lagi untuk ujian ketepatan formula. Imej radiograf dua dimensi bagi 136 gigi pramolar pertama daripada populasi di Malaysia digunakan dalam kajian ini. Pengukuran gigi adalah berdasarkan kaedah Cameriere iaitu mengukur nisbah kawasan pulpa kepada kawasan keseluruhan gigi (PTR). Analisis statistik Pearson dilakukan bagi melihat hubungan antara saiz rongga pulpa dengan umur individu manakala analisis regresi linear dilakukan bagi menjana formula pengiraan untuk menganggar umur individu. Analisis korelasi Pearson mendapati terdapat hubungan negatif antara saiz rongga pulpa dengan umur (koefisien korelasi: -0.608 hingga -0.699) menunjukkan saiz rongga pulpa akan bertambah kecil apabila umur semakin meningkat. Formula pengiraan yang dijana mendapati nilai R2 antara 0.37 hingga 0.488 dengan nilai S.E.E. 3.329 hingga 4.413 tahun. Sebanyak 32 sampel gigi pramolar pertama baru yang dipilih secara rawak digunakan untuk menguji ketepatan formula pengiraaan. Julat purata perbezaan antara umur sebenar individu dengan umur yang dianggarkan menggunakan formula pengiraan adalah 1.670 hingga 3.316 tahun. Formula pengiraan yang dijana berpotensi untuk digunakan bagi menganggar umur individu dalam kes forensik serta kajian arkeologi.

 

Kata kunci: Nisbah kawasan pulpa kepada kawasan gigi (PTR); pemendapan dentin sekunder; penganggaran umur

 

ABSTRACT

Apposition of secondary dentine can cause the decrease in pulp cavity size as the age of an individual increases. The purpose of this study was to examine the relationship between the pulp cavity size and the age of an individual using pulp/tooth area ratio (PTR) based on Cameriere's method of Malaysian population. This study involved 168 samples with 136 samples to generate formula and 32 samples for validity test. Two-dimensional radiographs of 136 first premolar samples from Malaysian populations were used in this study. The teeth measurement was based on Cameriere's method where the ratio of pulp area to the overall tooth area PTR (pulp/tooth area ratio). Pearson statistical analysis was carried out to examine the relationship between pulp cavity size and individual's age while linear regression analysis was done to develop formula for age estimation. Pearson correlation analysis shows that there is negative correlation between pulp cavity size and individual's age (correlation coefficient: -0.608 to -0.699); an indication that the size of pulp cavity become smaller when the age increase. The R2 value based on the formula ranged between 0.37 and 0.488 and S.E.E. ranging from 3.329 to 4.413 years. A total of 32 randomly selected first premolar samples were used to validate the accuracy of the formulas generated. The mean difference between the real age and the estimated age ranged from 1.670 years to 3.316 years. The generated formula can be potentially used to estimate individual's age in forensic cases and archaeological researches.

 

Keywords: Age estimation; apposition of secondary dentine; pulp/tooth area ratio (PTR)

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*Corresponding author; email: hisham@ukm.edu.my