FOURIER TRANSFORM INFRA RED (FTIR) SPECTROSCOPIC STUDIES ON TEETH DECAY OF MALAYSIAN PEOPLE IN PENANG
| Presenter | : | NABIHA KASEM HUSSAIN |
| : | - | |
| Date | : | 23 / 10 / 2009 |
| Time | : | 10.00 AM |
| Venue | : | COMPUTER LAB (NO. 269), LEVEL 2, SCHOOL OF PHYSICS |
| Sypnosis | : | The present study was carried out to investigate the decayed teeth among the various ethnic groups in Malaysia and identify the main causes of this decay. The study was conducted on a sample of 40 adults representing all the ethnicities in Malaysia. Decayed teeth were collected from 4 private Clinics in Penang, Malaysia. The chemical composition of the major elements in the intact section and caries tissue in the teeth was performed using SEM/EDX (Scanning electron microscope and energy Dispersive X-ray) system. The chemical formulae of these elements in the intact section and caries tissue were also determined using the XRD system. The chemical and physical structures of the intact sides of the teeth tissue of 18 Malay females selected based dietary and genetic similarity were studied using FTIR spectroscopy system. The results revealed that there is a significant decrease in the major elements including Na, Ca, P and Cl. Fluoride and Mg were not detected in all the investigated samples. The percentage of decayed teeth was significantly higher amongst females than amongst males. The morphology of decayed teeth showed irregular patterns in relation to race or age. The relationships of atomic percentage of Ca and P with the atomic percentage of O and C in intact side and caries tissues of the teeth were similar. This suggests that the bacterial and acidic effects on Ca and P were similar. The chemical composition and formulae of the major compounds in the intact part of the decayed teeth and caries were different from those found in healthy teeth. The FTIR test of the intact side of decayed teeth of Malay females indicated that the trends of the spectra were similar while the main difference was in the amounts of the tissue components. When the normal teeth tissues (non-carious) were exposed to soft drink 0, 5, 10, 15, 30, 45, 60 and 75 minutes after can opening, the spectrum study showed that, the teeth components were not changed significantly during a short period of contact between the tooth and the soft drink when it was being consumed. This suggests that the effect of the soft drink was cumulative. In conclusion, the present study indicated that the intact sides of decayed teeth were not healthy. In addition, it also revealed that the teeth of Malaysians are deficient in the major mineral salts and thus susceptible to future decay as the intact side was not healthy. Moreover, the study showed that race is not an important contributor to teeth decaying. |
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