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Isolation of lactobacillus from periodontally healthy subjects and its antimicrobial activity against periodontal pathogens

Azizah Ahmad Fauzi, Zaleha Shafiei, Badiah Baharin, Nurulhuda Mohd

Sains Malaysiana, 2013;42:19-24.

Bacteriocin or Bacteriocin like inhibitory substances (BLIS) is a protein antibiotic that has a relatively narrow spectrum of killing activity. It could potentially serve as a natural alternative to antibiotics in reducing the development of multi-drug resistant bacteria. Antimicrobial activity of the strains of Lactobacillus sp. isolated from healthy subjects (test strains) against Aggregatibacter actinomycetemcomitans and other periodontal pathogens (indicator strains) isolated from subgingival plaques of aggressive periodontitis patients were determined by using deferred antagonism test and agar-well diffusion method. Strains of Lactobacillus sp., Aggregatibacter actinomycetemcomitans and black pigmented bacteria were selectively isolated from TJA, TSBV and TSBA agars, respectively. Mean diameter zone of inhibition of at least 10 mm was considered as positive results for both methods. Out of 25 strains of Lactobacillus sp. screened, only eight test strains of Lactobacillus sp. showed the specific antimicrobial activity against certain strains of indicator periodontal pathogens during deferred antagonism test. However, out of eight potential strains, only three strains, which were Lactobacillus sp. strain S, Lactobacillus sp. strain V and Lactobacillus sp. strain W consistently showed positive inhibitory activity against black pigmented bacteria by deferred antagonism test and agar-well diffusion method. Therefore, these three strains should be considered as potential BLIS producer strains for further study.
Reliability of panoramic-radiograph to determine the position of third-molar from inferior-alveolar-canal

Azizah Ahmad Fauzi, Mohamed Ebrahim Parker, Norval E., Phrabhakaran N

Sains Malaysiana, 2017;46:59-65.

Cone-beam-computed-tomography (CBCT) has been useful in providing insights of relevant anatomy prior to surgical
procedures, including the assessment of the proximity of impacted mandibular-third-molar to the inferior-alveolar-canal
(IAC). It is important to understand the reliability of conventional panoramic-radiograph in the assessment of this criterion
since it is more commonly used as first line radiographic approach due to its availability and lower radiation dose. This
study aimed to investigate the reliability of conventional panoramic-radiograph in the evaluation of the proximity of
impacted mandibular-third-molar root tip to the IAC by correlating the results with CBCT. A total of 65 root tips of impacted
mandibular-third-molars that had both panoramic radiographs and CBCT images were included in this retrospective study.
Two trained observers participated in all image evaluations. A prepared standard 1 cm ruler was used to measure the
proximity of the third-molar root apices to the IACs. Measurements recorded in this study were categorized into positive
(root apex above a roof of IAC), zero (root apex was superimposed on IAC) and negative (root apex below a roof of IAC).
Data analysis was carried out using student t-test. In this study, both observers recorded statistically significant differences
in the measurement between third-molars root apices and the IAC from panoramic radiographs and CBCT images. The low
reliability of panoramic radiograph to assess the vertical proximity between these two anatomical structures suggests
the importance of additional assessment with CBCT in cases where panoramic radiograph shows superimposition of the
third molar root on the roof of the canal and presence of root below the roof of the IAC.
Fulltext The effectiveness of antenatal class towards improvement of knowledge among pregnant women in Hospital Chancellor Tuanku Muhriz (HCTM)

Rohani Mamat, Roziah Arabi, Hartini Jantan, Hanisah Zainal Abidin, Nor Azizah Ahmad, Shakinah Awang

Malaysian Journal of Medicine and Health Sciences, 2020;16(105):60-0.
MyJurnal

Introduction: Antenatal knowledge is associated with positive outcome for pregnant women as it provides infor- mation to allow them to identify any problems during pregnancy. Studies have underlined the problems of the information overload is possible during an antenatal class, it is unclear to what extend information given during an- tenatal class are retain by mother, thus the need for this study. Methods: This is a quasi-pre-post experimental study involving 82 participants. Baseline pre and post knowledge on antenatal class was evaluated among respondents using validate questionnaires. T-test was used to determine the relationship between various socio-demographic factors and knowledge of respondents. Results: Chi-square test used to test pre and post knowledge score. There was a significant increase in the difference between before and after antenatal classes run against the knowledge. In addition, the study found no significant difference for participants who are professional and non-professional and level of education. Conclusion: This study concludes thatthe antenatal classes run in HCTM shows a positive im- pact in improving maternal care during pregnancy, childbirth and care after birth. It is best to suggest that to increase promotion and information regarding antenatal classes so that pregnant women and couple could attend and get the benefit from the class.
Potential study of bilberry extract as a ph indicator to monitor food freshness by chromametry

Noor Azizah Ahmad, Faridah Salam, Sharina Abu Hanifah, Lee Yook Heng

Sains Malaysiana, 2018;47:2685-2691.

Penunjuk pH sebagai suatu pendekatan untuk memantau kualiti atau kesegaran makanan semasa telah mendapat perhatian
industri pembungkusan makanan. Penggunaan sumber semula jadi pigmen tumbuhan terutamanya daripada buah-buahan
dan sayur-sayuran menjadi pilihan para pengguna untuk menggantikan pewarna sintetik dalam memastikan keselamatan
makanan yang diambil setiap hari. Dalam kajian ini, ekstrak daripada bilberi telah digunakan sebagai pewarna sensitif
pH. Perubahan warna sampel dikaji secara terperinci melalui kaedah kromametri dan juga kaedah spektrofotometri
ultra-lembayung nampak. Warna merah terang terhasil dalam pH berasid, merah pudar pada neutral dan magenta ke
kuning dalam pH beralkali. Keputusan kajian kromametri menunjukkan bahawa ekstrak bilberi berupaya mempamerkan
perubahan warna yang jelas terhadap perubahan pH, iaitu terdapat perubahan nilai warna a* yang menyumbang kepada
perubahan yang bererti dalam perbezaan warna keseluruhan (ΔE*). Nilai ΔE* juga ditentukan wujud hubungan linear
dan kuantitatif terhadap julat pH tertentu. Oleh yang demikian, ekstrak bilberi didapati berpotensi sebagai bahan sensor
untuk pH dalam membangunkan satu sensor pH bagi memantau kesegaran makanan terutamanya hasilan laut berbungkus
memandangkan tahap kerosakan produk tersebut berkait rapat dengan perubahan pH ke arah alkali.
Gorham's disease of the mandible: radiological features

Soh HY, Fauzi AA, Nazimi AJ, Ramli R

Oral Radiol, 2018 05;34(2):179-184.
PMID: 30484126 DOI: 10.1007/s11282-017-0282-z

The most conspicuous element of Gorham's disease is its radiographic features, wherein massive disappearance of the mandible is observed. We report a case of an adolescent boy with massive osteolysis of the mandible in whom the diagnosis of Gorham's disease was made. A 14-year-old boy was referred to the Department of Oral and Maxillofacial Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, for the management of a massive mandibular deformity. He was diagnosed with a hemangioma-like lesion at 1 year of age. The disease had progressed for an unknown number of years. Plain X-rays and computed tomography images were examined for reconstructive surgery planning. Gorham's disease is self-limiting, but has catastrophic results. The role of imaging is huge, particularly for reconstructive surgery planning.
Fulltext Absorption study of triangular and rectangular slotted on hollow pyramidal absorber

Mohamad Faisal Asmadi, Hasnain Abdullah, Mas Izzaty Binti Fazin, Ahmad Rashidy Razali, Mohd Nasir Taib, Azizah Ahmad, et al.

ESTEEM Academic Journal, 2020;16(2):21-30.
MyJurnal

Today, electromagnetic wave theory is commonly used in many engineering devices. However, such devices produce electromagnetic (EM) radiation, damaging people's health and the impact of other electronic device's operation. Therefore, Microwave Absorber has been widely used in anechoic chamber to measure equipment radiation and prevent unwanted radiation and electromagnetic interference. This research investigates the absorption performance of pyramidal absorbers with a slotted method design. This research used rectangular and triangular slotted on the hollow pyramidal absorber. There are six types of slotted: Design 1, Design 2, and Design 3
which have triangular shapes, and Design 4, Design 5, and Design 6, have rectangular shapes. The pyramidal absorber is produced using CST Microwave Studio Suite. Afterward, the fabrication process is performed using cardboard and coated with Powdered Activated Carbon (PAC). Measurement had been done successfully via far-field measurement using an arch method at 1 GHz to 12 GHz. The slotted pyramidal absorber's absorptivity was taken in each frequency band and was tabulated in figure 10. The result is compared with their maximum absorption in each of the four frequency bands. Comparison based on slot design, triangular and rectangular each had its own advantages at a certain frequency. However, small rectangular slot of Design 1 shows consistent absorption performance at all frequency band.
Fulltext Predictors of osteoradionecrosis following irradiated tooth extraction

Khoo SC, Nabil S, Fauzi AA, Yunus SSM, Ngeow WC, Ramli R

Radiat Oncol, 2021 Jul 14;16(1):130.
PMID: 34261515 DOI: 10.1186/s13014-021-01851-0

BACKGROUND: Tooth extraction post radiotherapy is one of the most important risk factors of osteoradionecrosis of the jawbones. The objective of this study was to determine the predictors of osteoradionecrosis (ORN) which were associated with a dental extraction post radiotherapy.
METHODS: A retrospective analysis of medical records and dental panoramic tomogram (DPT) of patients with a history of head and neck radiotherapy who underwent dental extraction between August 2005 to October 2019 was conducted.
RESULTS: Seventy-three patients fulfilled the inclusion criteria. 16 (21.9%) had ORN post dental extraction and 389 teeth were extracted. 33 sockets (8.5%) developed ORN. Univariate analyses showed significant associations with ORN for the following factors: tooth type, tooth pathology, surgical procedure, primary closure, target volume, total dose, timing of extraction post radiotherapy, bony changes at extraction site and visibility of lower and upper cortical line of mandibular canal. Using multivariate analysis, the odds of developing an ORN from a surgical procedure was 6.50 (CI 1.37-30.91, p = 0.02). Dental extraction of more than 5 years after radiotherapy and invisible upper cortical line of mandibular canal on the DPT have the odds of 0.06 (CI 0.01-0.25, p