Displaying publications 1 - 20 of 142 in total

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  1. Kannan, T.P., Quah, B.B., Azlina, A., Samsudin, A.R.
    MyJurnal
    Dentistry has searched for an ideal material to place in osseous defects for many years. Endogenous bone replacement has been the golden standard but involves additional surgery and may be available in limited quantities. Also, the exogenous bone replacement poses a risk of viral or bacterial transmission and the human body may even reject them. Therefore, before new biomaterials are approved for medical use, mutagenesis systems to exclude cytotoxic, mutagenic or carcinogenic properties are applied worldwide. The present preliminary study was carried out in five male New Zealand white rabbits (Oryctolagus cuniculus). Porous form of synthetic hydroxyapatite granules (500 mg), manufactured by School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Penang, was implanted in the femur of the rabbits. Blood samples were collected prior to implantation and one week after implantation. The blood was cultured in vitro and the cell division was arrested at metaphase using colcemid. This was followed by the hypotonic treatment and fixation. Then, the chromosomes were prepared and stained for analysis. The modal chromosome number of rabbit (Oryctolagus cuniculus) was found to be 2n=44. The mean mitotic index values prior to and after implantation were 3.30 ± 0.66 and 3.24 ± 0.27 per cent respectively. No gross chromosome aberrations, both numerical and structural were noticed either prior to or after implantation of the biomaterial. These findings indicate that the test substance, synthetic hydroxyapatite granules does not produce gross chromosome aberrations under the present test conditions in rabbits.
  2. Saerah, N.B., Ismail, N.M., Naing, L., Ismail, A.R.
    MyJurnal
    Tooth wear is the non-carious loss of tooth tissue due to attrition, erosion and/or abrasion. The amount of wear that accelerates physiological tooth wear is referred as pathological tooth wear. This study aims to determine the prevalence and mean scores according to mouth quadrant of raw tooth wear (RTW) and pathological tooth wear (PTW) and investigate sex association with PTW among 16-year-old secondary school children in Kota Bharu, Kelantan. This cross-sectional study involves 688 participants randomly selected from eight government secondary schools. The Smith and Knight Tooth Wear Index (TWI) was used. Data were analyzed using a simplified Microsoft Excel program developed based on the index to quantify PTW. Bar graphs were plotted to highlight the mean scores according to mouth quadrant. About 44% of participants were male and 56% were female. The prevalence of RTW and PTW among subjects was 100% and 20.1% respectively. It was found that 32.8% of tooth surfaces were affected with RTW and 0.7% of study subjects already had exposed dentine. The most affected quadrant for RTW and PTW was the upper and lower incisal quadrant respectively. Males had 92% more odds of developing tooth wear compared to females. In conclusion, all subjects have some degree of wear. About one-fifth of the study subjects were affected by PTW. The patterns of wear were similar to those encountered in the Western societies. There was statistically significant association between sex and PTW.
  3. Tan, S.L., Belaton, B., Rajion, Z.A., Samsudin, A.R.
    MyJurnal
    We present an algorithm to reduce the number of slices from 2D contour cross sections. The main aim of the algorithm is to filter less significant slices while preserving an acceptable level of output quality and keeping the computational cost to reconstruct surface(s) at a minimal level. This research is motivated mainly by two factors; first 2D cross sections data is often huge in size and high in precisions – the computational cost to reconstruct surface(s) from them is closely related to the size and complexity of this data. Second, we can trades visual fidelity with speed of computations if we can remove visually insignificant data from the original dataset which may contains redundant information. In our algorithm we use the number of contour points on a pair of slices to calculate the distance between them. Selection to retain/reject a slice is based on the value of distance compared against a threshold value. Optimal threshold value is derived to produce set of slices that collectively represent the feature of the dataset. We tested our algorithm over six different set of data, varying in complexities and sizes. The results show slice reduction rate depends on the complexity of the dataset, where highest reduction percentage is achieved for objects with lots of constant local variations. Our derived optimal thresholds seem to be able to produce the right set of slices with the potential of creating surface(s) that traded off the accuracy and speed requirements.
  4. Masudi, S.M., Padtong, E.A.
    MyJurnal
    The objective of this study was to evaluate and compare the effect of times elapsed on the application of a single-step adhesive system and activation of light cured subsequently placed composite to the bond strength between composites and adhesives. This was an experimental study using fifteen teeth extracted human premolars, which were caries and pathology free. Sample of teeth were embedded up to cemento-enamel junction on box of acrylic resin. All teeth were cut to obtain flat occlusal dentin surfaces. The specimens were randomly selected and divided into three groups with five teeth each. All the teeth were assigned to single-step bonding system AQ Bond (Sun Medical Co. Ltd., Shiga, Japan) according to manufacturer’s direction. Group 1 was left for 45 seconds, group 2 for 2 minutes, while group 3 was 5 minutes before putting subsequently restorative material. Composite resin was applied in 3 mm diameter and 6 mm height of cylinder mold and cured according to manufacturer’s direction on the dentin surface. Shear bond strength were measured using a testing system (Instron 8874, Instron Corp., Canton, MA, USA) at a crosshead speed of 2 mm/min with cell load capacity of 25 KN. The bond-strengths between single step adhesive system (AQ Bond) and light cured composites were tested. Mann-Whitney test showed no significant differences in bond-strength between Group 1 and Group 2. However, there were significantly differences (p
  5. Rusli, B.N., Edimansyah, B.A., Naing, L.
    MyJurnal
    Several studies on job stress have been conducted among nurses, teachers, clerks, lecturers, laboratory technicians, petroleum and automotive workers and the calculated prevalences ranged from 20-35%; associated factors identified include high job demand, low job control and poor social support. Thus, the aim of the present study was to determine the prevalence and associated factors of stress in dental healthcare workers of an institution of higher learning in Kelantan. A cross-sectional study of the prevalence and associated factors of stress in 54 dental healthcare workers of an institution of higher learning in Kelantan [response rate of 63.5 percent] was conducted in March 2006. The Malay version of the validated Depression, Anxiety and Stress Scale and Karasek’s Job Content Questionnaire were used as research instruments in this study. Informed consents were obtained from all participants. The prevalence of stress was 22.2%. One (1.9%) staff member experienced severe stress whilst 20.4% experienced mild to moderate stress. After controlling for age, sex, marital status and duration of work, psychological job demand (adj. b 0.61, 95% CI 0.21, 1.00, p=0.003), toxic exposures (adj. b 1.41, 95% CI 0.47, 2.35, p=0.004) and overtime work (adj. b 5.67, 95% CI - 1.18, 10.16, p=0.015) were directly associated with reported stress in dental healthcare workers. High psychological job demand, increased toxic exposures at work and increased overtime work were significantly associated with stress in dental healthcare workers. These findings can be used to guide preventive measures to reduce stress in dental healthcare settings.
  6. Gopinath, V.K., Arzreanne , A.R.
    MyJurnal
    The objective of this study was to evaluate the effects of salivary testing in dental caries assessment. The role of saliva flow rate, pH, viscosity and buffering capacity in subjects with high caries (DMFT>5) (group 1) against subjects with low caries (DMFT=0) (control group) were evaluated. 40 subjects between the age of 18 and 40 years old were selected (20 subjects control group and 20 subjects group 1). By using a salivary testing kit (GC Asia Dental Pte Ltd, Japan), each subject underwent test such as hydration status of the oral mucosa, viscosity and pH of resting saliva, stimulated salivary flow rate and buffering capacity of stimulated saliva. The results showed that the flow rate, viscosity, pH and buffering capacity of saliva in subjects of group 1 (DMFT>5) was significantly lower (p
  7. Nizam, A., Gopal, R.N., Naing, L., Hakim, A.B., Samsudin, A.R.
    MyJurnal
    The purpose of this study was to determine the dimensional accuracy of the skull models produced by Rapid prototyping technology using stereolithography apparatus. Computed tomography images were captured from four dry normal adult human skulls. The resultant 2-D images were stored in Digital Imaging and Communications in Medicine (DICOM) format. The segmentation of the images was prepared in MIMICS software. The slice files were then exported to a stereolithography apparatus (SLA) to produce the replica of each skull. Eight linear measurements were repeatedly made between identified landmarks on each of the original skull and its replica model using an electronic digital calliper. Each of the linear measurements was repeated 5 times and the average was taken to determine the absolute difference and percent difference between the original skull and its replica model. The overall absolute difference between the four human adult skulls and its replica models was 0.23 mm with a standard deviation of 1.37 mm. The percent difference was 0.08% with a standard deviation of 1.25%. The degree of error established by this system seems affordable in clinical applications when these models are used in the field of dental surgery for surgical treatment planning.
  8. Husein, A.
    MyJurnal
    The replacement of missing teeth with implant borne restorations has become a treatment modality accepted by the scientific community for fully and partially edentulous patients. Recent developments in oral implantology involve the use of immediate implant placement technique that significantly reduces waiting time. This case report describes the management of an anterior missing tooth using immediate implant. The result was good, which further validate the use of this technique for suitable patient management.
  9. Husein, A.
    MyJurnal
    Lasers were introduced into the field of clinical dentistry with the hope of overcoming some of the drawbacks posed by the conventional methods of dental procedures. Since its first experiment for dental application in the 1960s, the use of laser has increased rapidly in the last couple of decades. At present, wide varieties of procedures are carried out using lasers. The aim of this review is to describe the application of lasers in dental hard tissue procedures. Lasers are found to be effective in cavity preparation, caries removal, restoration removal, etching, and treatment of dentinal sensitivity, caries prevention and bleaching. Based on development in adhesive dentistry and the propagation of minimum intervention principles, lasers may revolutionize cavity design and preparation.
  10. Rahman, S., Shaari, R., Hassan, R.
    MyJurnal
    A 48 years old Malay lady with a case of painless soft fluctuant swelling of left parotid gland is reported. The lesion was found to be a cystic lesion through the pre operative examinations and investigations. The cyst was completely excised, taking care not to injure the lower division of the facial nerve. Post recovery was uneventful with no defect of the facial nerve functions. The histologic picture confirmed that the cyst was lymphoepithelial cyst which is so called “branchial cyst”. Through the literature reviews of parotid lymphoepitelial cyst the discussions on prevalence, origin, diagnosis, histological finding, investigation and the modes of treatment are made. The ultra sound was found to be valuable in the pre operative evaluation of the parotid swelling furthermore it is non-invasive, harmless, painless and relatively quick.
  11. Rajion, Z.A.
    MyJurnal
    Imaging is a keystone for the understanding and delivery of craniofacial health care and recent developments have led to many diverse technologies and approaches. This paper reviews new developments in three-dimensional imaging, as well as three-dimensional facial image acquisition. Visualization and convergence of the data from these technologies are also described for construction of patient-specific models.
  12. Naing, L., Winn, T., Rusli, B.N.
    MyJurnal
    The sample size calculation for a prevalence only needs a simple formula. However, there are a number of practical issues in selecting values for the parameters required in the formula. Several practical issues are addressed and appropriate recommendations are given. The paper also suggests the application of a software calculator that checks the normal approximation assumption and incorporates finite population correction in the sample size calculation.
  13. Majid, Z., Chong, A., Setan, H., Ahmad, A., Rajion, Z.A.
    MyJurnal
    This paper describes the use of stereophotogrammetry approach to measure and hence identify accurately threedimensional (3D) coordinates of important landmarks on a craniofacial surface. A "novel" technique dubbed as "natural features" technique was employed to accurately compute the 3D coordinates of selected craniofacial landmarks. The natural features technique involves the use of 3D coordinates of the natural features (such as acne, scar, corners of eyes, edge of mouth, point of chin, etc.) that appear on the craniofacial surface as an absolute stereophotogrammetric mapping control points. The 3D coordinates of the natural features were gained using digital photogrammetric bundle adjustment method. Validation of the proposed technique has firstly been carried out using mannequin and finally, it was applied on the real-life human faces. The result shows that the craniofacial landmark measurement accuracy of 0.8mm with one standard deviation can be successfully achieved by the proposed technique.
  14. Sayuti, R., Baharudin, A., Amran, M.
    MyJurnal
    Submasseteric abscess is unusual in the head and neck region. Patients with this condition may be misdiagnosed as a parotid abscess due to the similarities in their presentation. Awareness and due recognition should be given to this unusual problem.
  15. Taib, H., Ali, T.B.T., Kamin, S.
    MyJurnal
    Gingival overgrowth is frequently observed in patients taking certain drugs such as calcium channel blockers, anticonvulsants and immunosuppressant. This can have a significant effect on the quality of life as well as increasing the oral bacterial load by generating plaque retention sites. Amlodipine, a third generation calcium channel blockers has been shown to promote gingival overgrowth although in very limited cases reported. The management of gingival overgrowth seems to be directed at controlling gingival inflammation through a good oral hygiene regimen. However in severe cases, surgical excision is the most preferred method of treatment, followed by rigorous oral hygiene procedures. This case report describes the management of gingival overgrowth in a hypertensive patient taking amlodipine. Combination of surgical gingivectomy and CO2 laser treatment was used to remove the gingival overgrowth. CO2 laser surgery produced good hemostasis and less pain during the procedure and post operatively. This case report has also shown that periodontal treatment alone without a change in associated drug can yield satisfactory clinical response.
  16. Hassan, R., Rahimah, A.K.
    MyJurnal
    Epidemiological studies of occlusion and malocclusion not only help in orthodontic treatment planning and evaluation of dental health services but also offer a valid research tool for ascertaining the operation of distinct environmental and genetic factors in the aetiology of malocclusion. The objective of this article was to give an overview on occlusion, malocclusion and the various methods on measuring the occlusion. Each index and method of the assessment described was based on the opinion of an individual or a group of individuals. It had been widely agreed that no particular index or method available that are truly inclusive of all occlusal criteria. Therefore, different indices or method had been developed according to different requirements and it may be necessary to use more than one index in order to gather information to suit the objective of the particular study.
  17. Seman, K., Abdul Manaf, H., Ismail, A.R.
    MyJurnal
    This study was to investigate the association between functional dentition with inadequate calorie intake and underweight in elderly people living in “Pondok” in Kelantan. A cross-sectional study participated by 369 elderly people was carried out. A simple random sampling method was utilized for the selection of the subjects. Subjects were interviewed using a structured form to collect information about subjects’ demographic background and self-reported health status. The 24-hour recall method was used to provide information on the subject’s exact food intake during the previous 24 hours. Body mass index was calculated from subjects’ weight and height, followed by oral assessment. The “Nutrical Software” was used for nutrient calculation, followed by SPSS version 11.5 for data analysis. The response rate was 95.6%. Majority of the respondents were female (92.4%). The percentage of subjects who had inadequate calorie intake and underweight was 71.0% and 25.7% respectively. The percentage of edentulism was 81.0%. The proportion of elderly with compromised functional dentition was 48.2% and majority was edentate elderly without wearing any complete dentures or wearing defective dentures, 23.6% and 56.2% respectively, while 20.2% was dentate elderly. The odds of having inadequate calorie intake and getting underweight among elderly with a compromised functional dentition was 3.7 times and 42.0 times respectively, compared to elderly with a non-compromised functional dentition. There was a significant association between inadequate calorie intake and underweight with functional dentition among elderly living in “Pondok” in Kelantan.
  18. Awang, R.A.R., Masudi, S.M., Mohd Nor, W.Z.W.
    MyJurnal
    Desensitization of teeth after cavity preparation has been recommended in an attempt to avoid post-operative sensitivity. However, there is concern regarding application effect of desensitizing agent on shear bond strength of the adhesive system used. The purpose of our study was to compare the shear bond strength of adhesive system in two different dentin surface treatments, with and without desensitizing agent. Sixteen extracted human premolars were sectioned off at the coronal portion to expose the flat dentin surfaces. The surfaces were finished using 600 Grit Wet Silicon Carbide abrasive papers. The premolars were randomly assigned to two groups: control and treated with MS Coat desensitizing agent. The desensitizer was applied according to manufacturer’s instruction. Resin composite was bonded to each dentin surface using Prime & Bond ® adhesive system. The composite resin was debonded by shear stress. Mann-Whitney Test was used in statistical analysis. Our result showed that application of MS Coat desensitizing agent on dentin surface had significantly reduced the shear bond strength of the adhesive system used (z = - 0.14, p < 0.05). Thus, we conclude that shear bond strength of Prime & Bond ® NT (Dentsply, USA) adhesive system will be reduced if dentin surface is treated with MS Coat (Sun Medical, Japan) desensitizing agent.
  19. Hussin, A.S., Mokhtar, N., Naing, L., Taylor, J.A., Mahmood, Z.
    MyJurnal
    The purpose of this study was to determine the timing and sequence of emergence of the first 28 permanent teeth in a cross-section of Malay children in the district of Kota Bharu, in northeastern Peninsula Malaysia. The sample consists of 478 boys and 908 girls of Malay descent aged between 5-19 years. The criterion for tooth emergence was the appearance of the tooth through the gingivae. Descriptive statistics were calculated and probit regression analysis performed to determine the mean age of emergence of the permanent dentition. The mean age at emergence was found to conform to general trends, with emergence seen earlier in girls than in boys. Comparisons were made with the Chinese (Hong Kong) and the Punjabi (Chandigarh) profiles, which showed earlier emergence timings in those ethnic groups. The emergence timing in Malays, however, was earlier than in Thais (Central Thailand). The sequence of emergence was determined by referring to the mean age of tooth emergence of individual teeth and conforms to the general trend seen in other studies.
  20. Seman, K., Abdul Manaf, H., Ismail, A.R.
    MyJurnal
    Limited information is available about the oral health of elderly people living in “Pondok” in Kelantan. This study aimed to assess the dentition status of elderly population staying in Islamic Religious Community Setup, “Pondok” in Kelantan. A cross sectional study involving 369 elderly people was carried out. A simple random sampling method was utilized for the selection of the subjects. Oral examination was done to assess the dentition status and data was analyzed using SPSS 11.5 version. The response rate was 95.6%. Majority of the subjects were edentulous (81.0%). The mean number of natural teeth, functional natural teeth, decayed teeth (D), missing teeth (M) and teeth indicated for extraction (X) were 3.22 (SD 7.54), 2.75 (SD 6.70), 0.06 (SD 0.48), 28.80 (SD 7.51) and 0.41 (SD 1.60) respectively. Among 70 dentate subjects, the mean number of natural teeth, functional natural teeth, occluding pair of functional natural teeth, decayed teeth (D), missing teeth (M), teeth indicated for extraction (X) and DMFX(T) index were 17.1 (SD 8.00), 14.5 (SD 8.11), 6.3 (SD 4.22), 0.3 (SD 1.06), 15.1 (SD 8.20), 2.2 (SD 3.14) and 17.6 (SD 8.08) respectively. There was no teeth had been filled (F). The proportion of subjects having minimum 20 functional natural teeth was 7.3%. The above results indicate that dental caries status of elderly people living in “Pondok” in Kelantan was unsatisfactory with high percentage of edentulism, contributing to the high value of the mean DMFX(T) index, 29.3 (SD 6.63).
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