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Full-Text Articles in Medicine and Health Sciences

Training Examiners For A National Epidemiological Survey Of Oral Mucosal Lesions, Rosnah Binti Zain, Razak I. A., Ikeda N., Axéll T., Downer M. C. Dec 1996

Training Examiners For A National Epidemiological Survey Of Oral Mucosal Lesions, Rosnah Binti Zain, Razak I. A., Ikeda N., Axéll T., Downer M. C.

Prof. Dr. Rosnah Binti Zain

Ensuring the validity and reliability of data collected in epidemiological surveys is an important consideration. The purpose of the present report is to describe a training and calibration programme for 16 examiners taking part in a national survey of oral mucosal lesions and to present an evaluation of the results. The programme included the distribution of a pictorial manual to participants and a series of lectures followed by three diagnostic sessions, two using slides and the last involving patients. At the final session, the trainees classified 88 per cent of 16 patients correctly in comparison with the definitive diagnoses of …


Unilateral Comminuted And Complicated Fracture Of The Mandible Due To Dog Attack, W.C. Ngeow, C. B. Lian Jul 1996

Unilateral Comminuted And Complicated Fracture Of The Mandible Due To Dog Attack, W.C. Ngeow, C. B. Lian

Wei Cheong Ngeow

Fractures of the mandible and their management are discussed in detail in textbooks and articles dealing with facial trauma. This paper presents the management and treatment of a case of a unilateral comminuted and complicated fracture of the mandible due to dog attack on a geriatric patient. The attack also severed the patient's right arm. Due to the severity of the trauma, an emergency surgery was performed on the mandible and arm.


An Unusual Dilacerated Root Of A Second Maxillary Molar, W.C Ngeow Jan 1996

An Unusual Dilacerated Root Of A Second Maxillary Molar, W.C Ngeow

Wei Cheong Ngeow

An unusual case of a second maxillary molar with a dilacerated root visible clinically is described. Apicectomy followed by retrograde amalgam filling was performed whereby gingival coverage and gingival seal was achieved.


Prevalence Of Oral Precancerous And Cancerous Lesions In Elderly Malaysians, Ali T. B., Jalalluddin R. L., Abdul Razak I., Rosnah Binti Zain Jan 1996

Prevalence Of Oral Precancerous And Cancerous Lesions In Elderly Malaysians, Ali T. B., Jalalluddin R. L., Abdul Razak I., Rosnah Binti Zain

Prof. Dr. Rosnah Binti Zain

A house to house survey on elderly subjects aged 60 years old and above was undertaken in a large district in Malaysia. A total of 486 subjects in randomly selected Enumeration Blocks were interviewed and examined. The prevalence of oral precancerous lesions was recorded at 3.3%, of which leukoplakia was the most common. When the ethnic distribution of these oral precancerous and cancerous (OPC) lesions was compared, 72% of those inflicted were Indians. Oral cancer was detected in two subjects (0.4%), both of whom were of Indian origin. Among subjects with OPC lesions, 4.2% were smokers, 12.7% were betelquid chewers, …


Proliferating Cell Nuclear Antigen (Pcna) And P53 In Epithelial Dysplasia And Squamous Cell Carcinoma Of Oral Mucosa - A Marker For Poor Tumor Differentiation, Increasing Nuclear Atypia And Invasiveness?, Lan H. A., Rosnah Binti Zain, Saitoh M., Muramatsu Y., Shrestha P., Mori M. Jan 1996

Proliferating Cell Nuclear Antigen (Pcna) And P53 In Epithelial Dysplasia And Squamous Cell Carcinoma Of Oral Mucosa - A Marker For Poor Tumor Differentiation, Increasing Nuclear Atypia And Invasiveness?, Lan H. A., Rosnah Binti Zain, Saitoh M., Muramatsu Y., Shrestha P., Mori M.

Prof. Dr. Rosnah Binti Zain

The immunohistochemical expression of proliferating cell nuclear antigen (PCNA) and p53 was investigated in 9 cases of epithelial dysplasia and 38 cases of squamous cell carcinoma of the oral cavity. The intensity of immunoreactivity for each marker was assessed using a semiquantitative grading system, and was correlated with tumor differentiation, nuclear atypia and the patterns of invasive margins in the underlying connective tissue. PCNA expression, in dysplastic epithelium, was observed in the suprabasal and lower spinous layers; and the labeling grade and intensity of staining increased along the degree of cellular atypia. In 2 cases of dysplasia, weak positive immunoreactivity …


The Ball Mill As A Means Of Investigating The Mechanical Failure Of Dental Materials, Noor Hayaty Abu Kasim Abu Kasim N.H. Dec 1995

The Ball Mill As A Means Of Investigating The Mechanical Failure Of Dental Materials, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Objective: The main purpose of this paper is to present a new method of predicting clinical performance using mechanical loading in a ball mill. Methods: A series of four experiments (two involving a hybrid composite and one each on orthodontic brackets and bands) is described in which the ball mill was used to subject specimens to mechanical fatigue. Results: A reproducibility study using composite beam specimens showed no significant difference between the Mean Survival Time (MST) in all the three experimental runs (P = 0.42). When subjected to thermal cycling, the MST of the cycled group was 155.0 min compared …