Al-Selwi, Abdullah Abdulkhaleq Mohammed
(2022)
3D morphometric evaluation of palatal rugae among Malaysian Malay population.
Masters thesis, Universiti Sains Malaysia.
Abstract
Palatal rugae pattern may have a promising and interesting future for human
identification purpose. Previous studies showed that palatal rugae pattern has a lot of
morphological and dimensional characteristics that are different from a person to
another even among the identical twins. In fact, palatal rugae are anatomically
located in a well protected place, behind boons, teeth, cheeks and lips, which
provides a good alternative option for human identification in mass disasters and
accidents. This study aimed to evaluate the variability and uniqueness of palatal
rugae among Malaysian Malays using 3D dental models. A 3D Next Engine Laser
scanner (USA) was used to digitize plaster dental casts of 130 Malaysian Malay
patients (65 males and 65 females) obtained from the archive of Orthodontic Clinic,
Hospital Universiti Sains Malaysia. The resulting 3D models were highlighted using
Paint 3D software (USA) for the purpose of rugae shape assessment. Rugae size
category and direction were assessed using 3Matic research software (Belgium). The
classification method of Thomas and Kotze (1983) as described by Kapali et al.
(1997) was adopted. Palatal rugae uniqueness was performed by superimposing 42
pairs of digital models (21 models were duplicated from the same patients and 21 models were randomly selected from the group). The 42 superimposition sets were
examined for palatal rugae surface fitting by a single blinded evaluator. Prevalence
of palatal rugae was presented in percentages while mean and standard deviation
were presented for number of rugae. Chi-square analyses were used to evaluate the
association between sex and prevalence of palatal rugae variables. Independent t-test
was used to compare sex difference in number of palatal rugae. Correct/wrong
decision of superimposition was presented in percentages. P-value <0.05 was
considered statistically significant. Total number of rugae was 1359 (673 in males
and 686 in females). Wavy shape was the predominant rugae among the sample,
followed by curve shape and straight shape respectively. The predominant rugae size
category was the primary size. Forwardly directed rugae were the most prevalent
rugae among the sample. There was no significant difference regarding rugae
features between males and females except for the rugae direction in the left side of
the palate, as the backward rugae direction was more prevalent among the females
(p=0.001). Palatal rugae pattern was unique. No two individuals have the same
pattern. Wavy shape, Primary size and forward direction were the most prevalent
among Malaysian Malays. Palatal rugae is unique thus could be used for human
identification in the case where pre-mortem and post-mortem records are available.
| Item Type: |
Thesis
(Masters)
|
| Uncontrolled Keywords: |
Palatal rugae |
| Subjects: |
R Medicine |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Mr Abdul Hadi Mohammad
|
| Date Deposited: |
18 Jul 2022 04:15 |
| Last Modified: |
18 Jul 2022 04:15 |
| URI: |
http://eprints.usm.my/id/eprint/53424 |
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