Displaying publications 1 - 20 of 232 in total

Abstract:
Sort:
  1. Abdullah, A.A.A., Yassin, Z., Zamzam, N.
    Ann Dent, 2001;8(1):-.
    MyJurnal
    This pilot survey was conducted to determine the main reason and the motivating factors which, influence patients in seeking orthodontic treatment. 115 patients aged 11-30 years old were taken from the orthodontic waiting list at the Dental Faculty, University Malaya dated December 1999 - May 2000. A structured questionnaire was designed and the survey of patients was carried out using the telephone. The desire to have a better dental appearance was the main reason (65 %) given by patients who were seeking orthodontic treatment. The most important motivating factor that influences patients in seeking orthodontic treatment was to attain straight teeth (48 %). In conclusion, patients seek orthodontic treatment mainly due to psychological reason, which is to improve dental appearance and aesthetic. Perceived needs of an orthodontic patient should also be taken into consideration before commencing orthodontic treatment to increase chances of mutually satisfying result for both the orthoqontist and patient.
  2. Radzi, Z., Yahya, N.A., Kasim, N.H.A., Ismail, N.H., Ismail, N.A., Zamzam, N
    Ann Dent, 2006;13(1):18-23.
    MyJurnal
    Introduction: Owing to the variety of materials and methods employed, comparison of the results and findings from bonding studies is difficult. Until recently, several types of teeth have been used in published research papers as a substrate in orthodontic bonding research including bovine incisors, fresh and rebonded human premolars. Objectives: The purpose of this study was to compare the shear bond strength of an adhesive bonded to different tooth surfaces (human premolar, bovine incisor and rebonded human premolar). Methods: Two groups of thirty premolar teeth and one group of bovine incisors had brackets attached in a standardized manner using Transbond XT (3M Unitek). The adhesive was cured using conventional halogen light and a specially designed tool to standardize the distance between the light curing tip and the adhesive. The debonding force was measured using Instron universal testing machine. ANOVA and Post Hoc Dunnett C test were performed to determine any significant difference among groups (p
  3. Yaacob, H.B., Ngeow, W.C., Tan, P.L., Zainal Arif, A.R.
    Ann Dent, 2002;9(1):-.
    MyJurnal
    The controversy on malignant transformation of oral lichen planus has always intrigued researchers. We present a case of lichenoid lesion and squamous cell carcinoma of the tongue, occurring in a middle aged Indian lady. The diagnosis and timing of these lesions is discussed.
  4. Abdul Rahman, Z.A., Jalaludin, M.A., Hussaini, N.Z., Zain, R.B.
    Ann Dent, 1998;5(1):-.
    MyJurnal
    Aneurysmal bone cyst is a rare non-epithelialized pseudocyst of the jaws. Jaffe and Lichtenstein in 1942 were the first to recognize aneurysmal bone cyst as a distinct clinical and pathological entity while Bernier and Bhaskar in 1958 were the first to describe the presence of this lesion in the jaws. A case of aneursymal bone cyst in the maxilla is presented and the literature reviewed.
  5. Sudiono, J., Zain, R.B.
    Ann Dent, 1998;5(1):-.
    MyJurnal
    The epithelial cystic linings and adjacent connective tissues of 61 cases of odontogenic cysts (radicular cysts[RC], dentigerous cysts[DC] and odontogenic keratocysts[OKC]) and unicystic ameloblastomas(UA) were described and compared histopathologically. The type of epithelium in relation to the presence of rete processes and the distribution of chronic inflammatory cells were analyzed statistically. Significant associations between the presence of rete processes in the non-keratinized epithelial linings and inflammation in the subjacent connective tissues of RC and DC were found in this study. There was also a statistically significant association between the presence of rete Processes and nonkeratinized epithelial linings in OKC. The results also showed that in inflamed OKC, the cystic lining epithelium exhibited hyperplasia indistinguishable from lining epithelium of RC and DC. This study further showed that ameloblastomatous-like epithelial cystic linings were present in inflammed odontogenic cysts. All except for one case of unicystic ameloblastomas in this study showed ameloblastomatous epithelial cystic linings. It is recommended that the lining epithelium of RC and DC be examined carefully in order to rule out OKC. Similarly, ameloblastomatous-like lining epithelium arising from chronic inflammation in RC and DC should be differentiated from true ameloblastomatous cystic lining. Such careful examinations are diagnostically important in view of the similarities of epithelial cystic linings of inflamed OKC with DC and RC aggressive behavior ofOKC and UA.
  6. Sudiono, J., Zain, R.B.
    Ann Dent, 2003;10(1):-.
    MyJurnal
    Proliferating Cell Nuclear Antigen (PCNA) is one of the several markers of cellular proliferation. Epithelial proliferations play a significant role in the behaviour of odontogenic lesions. The objective of this study was to describe and compare the distribution of PCNA expression within the epithelial linings of odontogenic cysts. A total of 49 cases of odontogenic cysts consisting of 18 radicular cysts, 16 dentigerous cysts, 15 odontogenic keratocysts (OKCs) was studied. All tissues were processed routinely prior to embedding in paraffin. PCNA immunohistochemical staining was performed on 4 !-tm thick deparaffinized sections mounted on sialinized slides using the peroxidase antiperoxidase method. The distributions of PCNA expression in the cysts linings were noted and comparison was made qualitatively and quantitatively. PCNA labelling index was used for the quantitative assessment. The results showed that PCNA staining was distributed in the basal and supra basal cells for radicular cysts, dentigerous cysts, and OKCs. PCNA labelling index was highest in OKC (22.33±4.07). The high PCNA labelling index in OKC is indicative of high proliferative activity thus supporting previous reports of OKC as the most aggressive type of odontogenic cysts.
  7. Choon, Y.F., Ramanathan, A., Ali, H., Ghani, W.M.N., Cheong, S.C., Zain, R.B.
    Ann Dent, 2011;18(1):8-17.
    MyJurnal
    Background: MDM2 and p53 are involved in a negative feedback loop where p53 regulates MDM2 at the transcriptional level. MDM2, in turn, downregulates p53. This co-ordinated interaction between these proteins is set to play an important role in the regulation of cell cycle progression following DNA damage to cells. The over-expression of both p53 and MDM2 has been reported in various cancers. However there are only few studies discussing the co-expression of MDM2 with p53 in oral squamous cell carcinoma Aim: The purpose of this study was to determine the correlation of co-expression of p53, MDM2, and Ki-67 proteins with clinico-pathological factors in oral squamous cell carcinoma (OSCC) and to conduct a systematic review of the co-expression of p53/MDM2.

    Method: This is a retrospective descriptive study and a systematic review. Formalin-fixed paraffinembedded tissues from 45 OSCC cases were stained by immunohistochemistry (IHC) for p53, MDM2, and Ki-67 proteins.

    Results: Immuno-reactivity for p53, MDM2, and Ki-67 was seen in 75.6%, 97.8%, and 62.2% cases of OSCC respectively. The co-expression of p53 and MDM2 (p53/MDM2) was detected in 97.1%, however there was no significant correlation between p53 and MDM2 expression. Notably, p53/MDM2 coexpression was significantly associated with tumour differentiation (p-value = 0.045). The Ki-67LI was not significantly associated with neither MDM2 nor p53/MDM2 co-expression (p-value = 0.268, 0.916 respectively).

    Conclusion: The expression of MDM2 was not signif icantly associated with p53 expression suggesting that MDM2 expression is mediated by p53-independent pathways or mutated p53 could not induce the expression of MDM2 in this set of OSCCs. The only clinico-pathological parameter that correlates significantly with co-expression of p53/MDM2 is tumour differentiation where it is suggestive that the co-expression of these 2 proteins is indicative of aggressive tumour behavior.
  8. Zain, R.B.
    Ann Dent, 1999;6(1):-.
    MyJurnal
    The most prevalent oral mucosal lesions are aphthous ulcerations commonly referred to as canker sores. The clinical characteristic of oral recurrent aphthous ulceration/stomatitis(ORAS) is well defined and can be partly described as an oval or rounded ulcer covered by a grey-white or yellowish fibrinous exudate and surrounded by an erythematous halo. There is intense or moderate pain and the ulcers heal in about 10 - 14 days for the more common type and more than 2 weeks for the severe type. Recurrence of the ulcers occurs at intervals within a year or over several years. Variations of ORAS described above have made studies on aetiology and treatment difficult to interpret due to differing descriptions of differing diseases with similar clinical signs and symptoms and possibly differing aetiologies. A classification that was considered useful as a working model for ORAS was formulated in 1978. While the classification of ORAS had been widely accepted since 1978, the cause for ORAS is still unknown and its aetiology in general remains unclear. However, its immunopathogenesis is now becoming more clearly defined.
  9. Ng LC, Helen, Razak IA, Ghani WMN, Marhazlinda J, Rahman ZAA, Norlida A, et al.
    Ann Dent, 2015;22(1):2-5.
    MyJurnal
    This study aims to identify the relationship between dietary intakes of β-carotene with risk of oral cancer.
    Methods: A hospital-based, case-control study was conducted on 306 Malaysians who seek treatment at participating centres/hospitals. Subjects selected from the Malaysian Oral Cancer Data and Tissue Banking System (MOCDTBS) consisted of 153 cases and 153 controls that were matched for gender, age (±5 years) and ethnicity. Food consumption was measured using Food Frequency Questionnaire (FFQ). NutrieMart Version 2.0.0 software was used to estimate daily nutrient of each subject from the FFQ. Logistic Regression analysis was conducted to compute the odds ratio (OR) for intakes of β-carotene and oral cancer risk.
    Results: Intake of β-carotene was found to be not associated with risk of oral cancer (OR 0.83, 95%CI: 0.42-1.66, p>0.05).
    Conclusion: No significant association was found between dietary intakes of β-carotene with oral cancer risk in this study population.
  10. Kumar SKS, Zain RB
    Ann Dent, 2004;11(1):41-50.
    MyJurnal
    Oral cancer is the sixth most common malignancy in the world. Despite recent advances in cancer diagnoses and therapies, the five-year survival rate of oral cancer patients has remained at a dismal 50% in the last few decades. Oral cancer is of major concern in Southeast Asia primarily because of the prevalent oral habits namely betel quid chewing, smoking and alcohol consumption. This paper provides a brief overview on the various aetiological agents and risk factors implicated in the development of oral cancer.
  11. Vaithilingam, R.D., Taiyeb-Ali, T.B., Yusuf, R.
    Ann Dent, 2010;17(1):1-8.
    MyJurnal
    This cross-sectional study was carried out to identify A. actinomycetemcomitans and P. intermedia in the subgingival plaque of three ethnic groups (Malays, Chinese and Indians) in a selected group of adult Malaysians with advanced Chronic Periodontitis and to correlate these findings with their periodontal status. Thirty periodontally diseased adults were age, gender and ethnically matched with 30 healthy individuals. Clinical parameters were assessed for all. Subgingival plaque samples were collected for identification of A. actinomycetemcomitans and P. intermedia using polymerase chain reaction. Prevalence for P. intermedia (83.3%) was high and A. actinomycetemcomitans
    (6.7%) low in the total subject population. P. intermedia and A. actinomycetemcomitans were more
    prevalent in diseased (86.7%, 10% respectively) than in healthy (80%, 3.33% respectively) subjects. A. actinomycetemcomitans was detected in 15% Indians, 5% Malays but none of the Chinese subjects whereas P. intermedia was detected in 90% Malays, 85% Indians and 75% Chinese subjects. No significant association between presence of A. actinomycetemcomitans
    and P. intermedia with race and periodontal disease status was found. Only A. actinomycetemcomitans had a significant association with clinical attachment level (CAL) (p < 0.05). In conclusion, in this small subject group, none of the pathogens were associated with race and periodontal disease status and only A. actinomycetemcomitans had a significant association with CAL.
  12. Asma, M., Ho, S.L., Yong, J.S., Nor, N.A.M., Yusof, Z.Y.M.
    Ann Dent, 2013;20(2):9-14.
    MyJurnal
    In response to the introduction of an integrated dental education program at University of Malaya (UM) in 2011, a study was conducted to develop a caries risk assessment model (CRA) for use in non-surgical caries management for Year 3 and 4 students of the new integrated program. Methods: The CRA model was based on risk indicators used by dental students in the Preventive Dental Clinic (PDC). Patients aged 15 years and above who attended the PDC for the first time in year 2009 and 2010 were used as study sample. Four hundred and fourteen patient names were identified from the student PDC logbook. Of the 414, 359 dental records had complete data and included in the analysis. Data were analysed using SPSS version 17.0. Chi-square test was used for group comparison and associated factors for coronal caries were analysed using Multiple Logistic Regression (MLR). Results: The final model showed that adults, brushing teeth once daily, and not having dental prosthesis/appliance were 3.31 (CI=1.64-6.69), 2.53 (CI=1.19-5.40), and 2.25 (CI=1.25-4.10) more likely to develop coronal caries, respectively, than adolescents, brushing teeth at least twice a day, and having dental prosthesis/appliance. Conclusions: The results indicate that age group, toothbrushing frequency and dental prosthesis status are significant indicators for coronal caries among patients. Outcomes of the study contributed towards bridging the gap between cariology
    and preventive modules in the new integrated dental program.
  13. Bahadun, J., Nik Hussien, N.N., Yunus, N.N.N.
    Ann Dent, 2007;14(1):26-30.
    MyJurnal
    Pyknodysostosis is a rare sclerosing bone disorder with autosomal recessive mode of inheritance. The condition is characterized by continuous bone deposition without physiological resorption, occurring mainly in the trabecular and not the cortical bone. The skeletal features include short stature, brachycephaly, open cranial sutures and fontanelles, diffuse osteosclerosis and obtuse mandibular angles. Among the oral features observed were grooved or furrowed palate and disturbances in eruption and exfoliation of teeth. Multiple fractures of long bones and osteomyelitis of the jaw are frequent complications. These are attributed to the increased brittleness and reduced vascularity of the bone as a result of continuous endosteal bone deposition. Treatment is usually successful with surgical management and sustained bactericidal antibiotic therapy, although hyperbaric oxygen has been recommended as adjunct treatment in the more refractory form.
  14. Kasim, N.H.A., Abdullah, B.J.J., Mahadevan, J., Yunus, N.
    Ann Dent, 1998;5(1):-.
    MyJurnal
    The impaction of dental prostheses in either the airway or esophagus is an under-recognized problem which may result in severe morbidity or even mortality. The radio-opacity and the size of fixed and removable dental prostheses in an animal carcass was investigated. Prostheses were placed one at a time in the oro-laryngopharynx or in tho trachea and the esophagus. Lateral radiographs were taken for each prosthesis in site. The radio-opacity and size of the prostheses on the radiograph was graded. Most of the prostheses investigated were radio-opaque though the removable prostheses were more likely to be radiolucent and differ in size. In a symptomatic patient with a missing dental prosthesis, a negative chest or abdominal radiograph does not exclude impaction, inhalation or ingestion. Further evaluation with endoscopy or even computed tomography may be essential to reduce the possibility of severe morbidity or even mortality.
  15. Yahya, N.A., Youngson, C.C.
    Ann Dent, 2007;14(1):7-13.
    MyJurnal
    The purpose of this study were to compare the emergence profiles of crowns with their contralateral tooth, in vitro, and to determine if there is any association between the design of tooth preparations and the resultant emergence profile. 50 working models used for single crown construction were examined. Measurements of the faciolingual width of the crowns and contralateral teeth were taken using digital calipers. Internal line angles and the margin width of dies and the emergence profile of the corresponding crowns were measured from longitudinally sectioned polyvinylsiloxane indices mounted on a flat-bed scanner using image analysis software. Using Students t tests, no statistically significant differences (p>0.05) were found for shoulder width (mean 0.94 ± 0.23mm), internal line angle (mean 105.83 ± 13.57°) or emergence profiles (28.56 ± 12.95°) in the different (anterior, premolar or molar) preparations or crowns. The mean emergence profiles for all crowns was statistically significantly greater (p
  16. Noor Hayati Azami, Nora Sakina Mohd Noor, Wei, Pin Ngan, Tze, Jovian Yu Then, Yeong, Chee Teoh
    Ann Dent, 2018;25(2):53-57.
    MyJurnal
    Aesthetic or cosmetic dentistry is one of the main areas of dental practice. Increasing demands of patients for
    aesthetics has resulted in the development of several techniques for restoring the anterior teeth. Composite
    resin restorations have become an integral part of contemporary restorative dentistry and can be called “star
    of minimal invasion” due to its conservative concepts. The direct composite veneering allows restoring the
    tooth in a natural way and preservation of sound tooth structure when compared to indirect restorations.
    Before placement of direct composite veneers, a proper diagnosis, available treatment options, cost of
    treatment, patient’s expectations and duration of treatment should be taken into consideration. This article
    presents three case reports of aesthetic rehabilitation of anterior teeth using direct composite with
    satisfactory outcome that mimic the natural dentition.
  17. Lui, J.L., Chan, C.L., Yap, K.T.
    Ann Dent, 2006;13(1):6-11.
    MyJurnal
    The aim of the study was to determine the depth of cure of a new nanocomposite when exposed to different curing times and also when different shades were polymerized. The nanocomposite, Filtek Supreme (3M ESPE), was packed into 96 plastic cylindrical moulds measuring 4 mm in internal diameter and 8 mm in length and then polymerized using a conventional quartz-tungsten-halogen light curing unit. The first part of the study involved curing 16 samples each of A2 shade of the nanocomposite at exposure times of 20s, 40s, 60s and 120s. For the second part, a similar number of samples of the dentinal opacity shades of A2, B3 and A4 of the nanocomposite were polymerized at a constant exposure time of 40s. The depth of polymerization of the nanocomposite in each sample was measured using a digimatic indicator. Curing depths were found to increase significantly (P < 0.05) with longer exposure time (20s < 40s < 60s < 120s) and decrease significantly with darker shades (A2 > B3 > A4).
  18. Radzi, Z., Yahya, N.A.
    Ann Dent, 2005;12(1):-.
    MyJurnal
    Breast-feeding offers many benefits to the baby and the mother. For instance, breast milk provides the right balance of nutrients to help an infant grow into a strong and healthy toddler. Even though breastfeeding is a natural process, it is not always easy. In certain situations, some mothers are unable to breastfeed their babies or the babies are unable to adapt to breastfeeding. This will lead to the use of bottle-feeding. The effect of breast-feeding and bottle-feeding on physical growth has been well established but less has been concentrated on the craniofacial growth and dental development. This review reveals the effects of breast-feeding and bottle-feeding on craniofacial growth and dentoalveolar development based on the available literature.
  19. Saamah, A.N., Said, A.S., Yahya, N.A.
    Ann Dent, 2016;23(1):13-18.
    MyJurnal
    The objectives of this study were to compare the microhardness, flexural strength and compressive
    strength of a new bulk-fill composite (SonicFill™) to a conventional nanohybrid composite (Herculite
    Precis) and an established bulk-fill composite (Tetric N Ceram). In addition, the depth of cure of the
    two bulk-fill resin composites was also investigated. The materials were prepared and tested for the
    mechanical properties following ISO 4049:2009. Microhardness and depth of cure were measured using
    Vickers hardness tester. Compressive and flexural strength were tested using a universal testing machine.
    To determine the depth of cure, microhardness of the bulk-fill composites were measured as a function
    of selected depth of materials at 0.5 mm, 2.0 mm and 4.0 mm. Data were analyzed by either one-way
    ANOVA or Friedman test. Analysis demonstrated that SonicFill™ gave the highest microhardness value
    (101.8 + 4.6 VHN) compared to the other two groups. There were no significant differences among all
    groups in flexural and compressive strength. The depth of cure decreased as the thickness of both bulkfill
    composites increased. In conclusion, SonicFill™ showed favorable mechanical properties compared
    to other composites tested. In both bulk-filled groups, microhardness value decreased as the thickness
    of the composite increased. The polymerization of the bulk-filled composites was effective only at 2 mm
    or less.
  20. SH, Ku, YS, Tan, Yahya NA
    Ann Dent, 2014;21(1):25-32.
    MyJurnal
    The study aimed to evaluate the quality of the hybrid
    layer form by three different adhesive systems. Class V
    cavities were prepared on the buccal surface of fourty
    extracted human premolars. The prepared teeth were
    randomly assigned into four groups according to the
    adhesive system and application mode. The systems
    were: Optibond S (OS, total-etch); Optibond Versa (OV,
    two-bottles, self-etch); Single Bond Universal (SBU,
    one-bottle, self-etch) and Single Bond Universal with
    etchant (SBU + etchant). All cavities were restored with
    composite (Filtek Z350XT). The samples were sectioned,
    polished and pretreated to remove minerals, protein
    and water prior to SEM evaluation. From the images,
    thickness of the hybrid layers was measured. Present of
    resin tags and adaptation failure were also recorded. The
    data obtained were analyzed using ANOVA, Dunnett’s
    T3, Kruskal-Wallis and Mann-Whitney tests. OS group
    showed the highest average hybrid layer thickness (4.34
    µm), followed by SBU + etchant (3.06 µm), OV (1.91 µm)
    and SBU (0.95 µm). Both adhesive and cohesive failures
    were observed in SBU group. Present of prominent resin
    tags were seen in both OS and OV groups. In conclusion,
    all the investigated adhesive systems were able to perform
    distinguishable actions as shown in micro-morphological
    alteration and hybrid layer thickness. Two-bottles, selfetch
    adhesive (OV) was proven to produce negligible
    adaptation failure compared to other adhesive systems in
    the present study. Combined all-in-one adhesive (SBU)
    was found to render a superior bonding performance in
    total-etch mode comparing to self-etch mode.
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links