MyMedR

Fulltext Oral lichen planus--a study of fifty-four cases

Yaacob HB

Med J Malaysia, 1981 Dec;36(4):239-42.

Fifty-Jour patients with oral lichen planus were studied over a three-year period. The important sites were the cheek mucosa, tongue and gingiva. The reticular pattern was the most common type. The professionals and the white collar workers formed the majority of the cases. Emotional disturbances was a predominant factor in this lesion. The rate of malignant change ranges from one to ten percent. Treatment included reassurance, good oral hygiene, avoidance of hot and spicy foods and topical corticosteroids.

Squamous odontogenic tumor

Yaacob HB

J Nihon Univ Sch Dent, 1990 Sep;32(3):187-91.

PMID: 2230962

The twenty-fifth reported case of squamous odontogenic tumor is presented. The patient was a 39-year-old Chinese Malaysian male. The lesion was asymptomatic and did not recur after excision. It is important to distinguish this type of lesion from squamous odontogenic tumor-like proliferation. The rest of Malassez is thought to be responsible for the histogenesis of the lesion. Better understanding will only be achieved when more cases are reported and studied.

Fulltext Benign migratory glossitis--a cause for worry?

Yaacob HB

Med J Malaysia, 1981 Dec;36(4):246-9.

PMID: 7334963

child and two elderly females with benign migratory glossitis (BMG) are presented. The aetiology is unknown, but emotional stress, mechanical and chemical trauma are important in the production of pain in an initially asymptomatic BMG. Treatment consists of reassurance, avoidance of hot, spicy and highly-seasoned foods. Any underlying reactive depression must be treated.

Pathogenic microbes of the oral environment

Park AW, Yaacob HB

J Nihon Univ Sch Dent, 1994 Mar;36(1):1-33.

PMID: 8207501

A synopsis of the origins and function of dental plaque and pellicle

Park AW, Yaacob HB

J Nihon Univ Sch Dent, 1994 Sep;36(3):157-74.

PMID: 7989958

Electrophoretic detection of salivary alpha-amylase activity

Rahim ZH, Yaacob HB

J Nihon Univ Sch Dent, 1992 Dec;34(4):273-7.

PMID: 1283755

Fresh samples of human whole saliva containing approximately 20-40 micrograms protein were analyzed using SDS-polyacrylamide slab gel electrophoresis systems. More than 20 protein bands were revealed by Coomassie Brilliant Blue R 250 staining. Some of the protein bands were shown to be glycoprotein-positive with PAS (periodic acid-Schiff) reagent. The protein bands with alpha-Amylase activity appeared within a molecular weight range of 120,000-180,000, which is 2 to 2.8 times higher than the normal molecular weight reported for alpha-Amylase from parotid saliva, and showed positive staining with PAS reagent. These results show that the alpha-Amylase in whole saliva appears to exist in a macromolecular form which is not dissociated in the presence of sodium dodecyl sulfate (SDS).

Awareness and acceptance of the hepatitis B vaccine by dental practitioners in Malaysia

Yaacob HB, Samaranayake LP

J Oral Pathol Med, 1989 Apr;18(4):236-9.

PMID: 2769596

A postal survey of 730 Malaysian dental practitioners was undertaken to assess their awareness and acceptance of the plasma derived hepatitis B vaccine. Only 32% of the 325 practitioners who responded had been vaccinated, 41% intended to be and 15% categorically refused vaccination. The main reservations about vaccine acceptance were fear of side effects including AIDS, cost of the vaccine and lack of information. Vaccine efficacy was not confirmed by serology in two-thirds of the vaccinees and two-fifths of the respondents were unaware that 5% of the vaccinees do not develop a successful antibody response after vaccination. Seventy-eight percent of dentists believed that their risk of contracting hepatitis B was high or very high while 71% recalled having received needle stick injuries in the 3 yr prior to the survey. Only 13% of respondents were aware of delta hepatitis while 63% were aware of non-A non-B hepatitis. The survey has highlighted the need for dissemination of information on hepatitis B vaccine among dentists in Malayasia.

The ancient origins of oral pathology

Park AW, Yaacob HB

J Nihon Univ Sch Dent, 1991 Dec;33(4):211-43.

PMID: 1787417

Belief in a golden age has provided mankind with solace in times of despair and with élan during the expansive periods of history. Dreamers imagine the golden age in the remote past, in paradise lost, free from toil and grief. Optimists put their faith in the future and believe that mankind, Prometheus-like, will master the arts of life through power and knowledge. Thus, the golden age means different things to different men, but the very belief in its existence implies the conviction that perfect health and happiness are birthrights of men. Yet, in reality, complete freedom from disease and from struggle is almost incompatible with the process of living.

Effects of fasting on saliva composition

Rahim ZH, Yaacob HB

J Nihon Univ Sch Dent, 1991 Dec;33(4):205-10.

PMID: 1787416

The concentrations of calcium, phosphate, protein and nitrite in whole unstimulated saliva, and the salivary flow rate under fasting conditions (saliva collected at least after 6 h without food and water) were compared with those under control conditions (saliva collected within 30 min to 1 h after food). The flow rate of fasting saliva was half that of control (0.098 ml/min vs 0.208 ml/min) and no significant differences in the flow rate were observed between sexes. The concentration of nitrite under fasting conditions was 50% higher than that in control saliva (p less than 0.05). The protein concentration was decreased, but not significantly, under fasting conditions. The composition of fasting saliva with regard to calcium and phosphate concentrations was comparable to that of the control. No significant variations in these components between sexes were observed under either condition.

Dental abrasion pattern in a selected group of Malaysians

Yaacob HB, Park AW

J Nihon Univ Sch Dent, 1990 Sep;32(3):175-80.

PMID: 2230960

Among 350 inhabitants of two villages, 31 (8.9%) cleaned their teeth using table salt and charcoal applied to their forefinger or a Melastoma brush. As a result, all had distinct forms of abrasion cavity on the labial surfaces of their teeth. All of the above three agents are highly abrasive and injurious to both the hard and soft oral tissues. This dying practice is only popular among a very small number of persons in the older age group, and should be discouraged.

Fulltext Temporomandibular pain dysfunction syndrome - an analysis of fifty patients

Yaacob HB, Ling BC

Med J Malaysia, 1981 Jun;36(2):83-6.

PMID: 7343824

Fifty patients with temporomandibular pain dysfunction syndrome were examined. Seventy-eight percent and 32 percent were female and male respectively. The white collar workers were more frequently affected. Emotional stress, dental malocclusion and a history of trauma were the main causes. Treatment consists of reassurance, relaxed jaw movements and exercises, anxiolytic drugs, thermotherapy, biting appliance, occlusal adjustments and restoration oflost dental units.

Fulltext Glossodynia and glossopyrosis - a discussion of the aetiology and management

Yaacob HB, Ling BC

Med J Malaysia, 1981 Sep;36(3):177-80.

PMID: 7329376

Fifty patients with temporomandibular pain dysfunction syndrome were examined. Seventy-eight percent and 32 percent were female and male respectively. The white collar workers were more frequently affected. Emotional stress, dental malocclusion and a history of trauma were the main causes. Treatment consists of reassurance, relaxed jaw movements and exercises, anxiolytic drugs, thermotherapy, biting appliance, occlusal adjustments and restoration of lost dental units.

Malignancy in oral lichen planus: a review of a group from the Malaysian population

Yaacob HB, Tan PL, Ngeow WC

J Oral Sci, 2002 Jun;44(2):65-71.

PMID: 12227497

The objective of this study was to determine the socio-demography (age, race and gender) of a group of Malaysian patients who were diagnosed as suffering from oral lichen planus (OLP). The occurrence of malignancy was also investigated. A total of 77 clinical and biopsy records of patients with OLP were studied. Females were affected more than males, with the female to male ratio being 2:1. Middle-aged Indian and Chinese females tend to be affected by OLP when compared with the rest of the population. Only 19 patients returned for further follow-up. One adult Indian female with a six-year history of lichenoid reaction showed the presence of malignancy.

Detection of human herpesvirus 7 in salivary glands

Yadav M, Nambiar S, Khoo SP, Yaacob HB

Arch Oral Biol, 1997 Aug;42(8):559-67.

PMID: 9347118

The prevalence and cellular distribution of human herpesvirus 7 (HHV-7) in archival labial salivary glands was analysed for virus-specific DNA sequences by polymerase chain reaction (PCR) and in situ hybridization signals. In addition, the cellular expression of HHV-7-encoded protein was detected by immunohistochemical staining with a virus-specific monoclonal antibody. Eleven of 20 samples were positive for the HHV-7 DNA sequence by PCR. Eighteen of 20 tissues analysed by in situ hybridization showed signals in ductal, serous and mucous cells. Some nuclei of these cells and also the myoepithelial population were positive. In immunolocalization studies, all 20 salivary glands consistently showed HHV-7-expressed protein in the cytoplasm of ductal cuboidal and columnar cells. The protein was also found in the cytoplasm of mucous and serous acinar cells that were immunopositive for HHV-7. The observations are consistent with the suggestion that the labial salivary gland is a site for virus replication, potential persistence and a source of infective HHV-7 in saliva.

Fulltext Lamotrigine for trigeminal neuralgia: efficacy and safety in comparison with carbamazepine

Shaikh S, Yaacob HB, Abd Rahman RB

J Chin Med Assoc, 2011 Jun;74(6):243-9.

PMID: 21621166 DOI: 10.1016/j.jcma.2011.04.002

BACKGROUND: Anticonvulsants are regarded as useful for the treatment of neuropathic pain. In this study, we evaluated the efficacy and occurrence of side effects of lamotrigine (LTG) in comparison with carbamazepine (CBZ), in trigeminal neuralgia (TN) patients.

METHODS: The study was an interventional and crossover comparison. Twenty-one patients with TN were administered with LTG in comparison to CBZ. The clinical trials comprised two phases of 40 days each, with an intervening three-day washout period. The final titration in dose for LTG was 400 mg and 1,200 mg for CBZ. Efficacy of the medications involved was determined by visual analog scale (VAS) and verbal rating scale (VRS). Side effects were recorded through marking of the profiles of side effects encountered on administration of LTG and CBZ, together with baseline haematological, hepatic and renal investigations.

RESULTS: Both on VAS and VRS assessments, in terms of proportion of patients, CBZ benefitted 90.5% (19/21) of the patients with pain relief (p 0.05). Meanwhile, LTG inflicted 14% (3/21) of the patients with haematological, hepatic and renal derangements, as compared with 48% (10/21) on CBZ.

CONCLUSION: LTG is generally an effective and safe treatment for management of TN, compared to CBZ.

Fulltext Oral speckled leukoplakia--report of two cases

Yaacob HB, Mahfuz Ali MA, Hamid JA

Med J Malaysia, 1983 Jun;38(2):118-20.

PMID: 6621440

Two cases of oral speckled leukoplakia with differing behaviour are presented. This precancerous lesion of unknown aetiology requires early diagnosis for proper management. Candida albicans are frequently found in these lesions. The significance of epithelial dysplasia in relation to treatment is discussed. Surgical removal is the treatment of choice.

Fulltext The efficacy of xylocaine topical anaesthetic in reducing injection pain

Yaacob HB, M Nor G, Malek SN, Mahfuz MA

Med J Malaysia, 1983 Mar;38(1):59-61.

PMID: 6633339

The efficacy of xylocaine topical anaesthetic and a placebo in reducing intraoral injection pain were tested in 72 patients. The topical agent was found to be very effective in reducing such pain and the authors recommend its use prior to intraoral injections for the benefit of the patient.

Fulltext The prevalence of tetracycline--stained teeth in Malaysians--a preliminary survey

Yaacob HB, Mahfuz Ali MA, Abd Hamid J

Med J Malaysia, 1983 Sep;38(3):197-9.

PMID: 6672561

Eighty-eight (1.96%) out of 4,500 patients had teeth stained by tetracycline. The majority had yellowish-brown stains (59.1%), whilst 37.5% had greyish-brown and 3.4% had black stains. A large number of teeth (79.6%) were stained up to two-thirds of their crowns. The deciduous teeth, permanent incisors and first molars were most commonly affected (73.9%). Teeth are only stained by tetracycline if this drug is administered during their calcification periods. For aesthetic reason, the drug should not be prescribed from the fourth month of pregnancy till the seventh year of life. The social embarrasment due to such discolouration may be overcome by tooth bleaching and construction of tooth facings and crowns.

Fulltext Metastatic follicular thyroid carcinoma to the mandible: a case report

Ismail SB, Abraham MT, Zaini ZB, Yaacob HB, Zain RB

Cases J, 2009;2:6533.

PMID: 19829820 DOI: 10.1186/1757-1626-2-6533

Metastatic lesions to the oro-facial region may be the first evidence of dissemination of an unknown tumour from its primary site.

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