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Fulltext A Rare Case of Contact Allergy towards Impression Compound Material

Wan Ali WNS, Ahmad Tarmidzi NA

Eur J Dent, 2021 Oct;15(4):798-801.
PMID: 34384124 DOI: 10.1055/s-0041-1731584

Impression compound has been introduced for more than 100 years. Since then, it has been widely used to obtain a preliminary impression of the edentulous arch. Although the use of impression compound has declined markedly over recent years as newer materials have become available, the cost-effectiveness and desirable physical and mechanical properties make this material indispensable in developing countries and teaching institutions. Its high viscosity characterizes impression compound as a mucocompressive impression material, which enables the full depth of the sulcus to be recorded for the retention of complete dentures. Literature reviews revealed that most contact allergies to impression materials are towards polyether, very few are towards alginate and polysulfide, and no reported cases have been found toward impression compound. This case report demonstrates a recent rare case of contact allergy towards impression compound during a routine impression taking for a fully edentulous arch in a 61-year-old woman. The patient developed symptoms of an allergic reaction, and the management of the condition was described.
Fulltext Effect of Food-Simulating Liquids on the Leachability of Plasticizers from Dental Tissue Conditioners

Wan Ali WNS, Parker S, Patel M

Eur J Dent, 2024 Jul;18(3):883-890.
PMID: 38331042 DOI: 10.1055/s-0043-1777046

OBJECTIVE: Tissue conditioners are composed of poly(ethyl methacrylate) (PEMA) powder and plasticizer/ethanol mix liquid. Butyl phthalyl butyl glycolate (BPBG) plasticizer is commonly used in tissue conditioners, but the main concern with phthalate plasticizer is its leachability and biocompatibility, especially the estrogenic activity and cytotoxicity of phthalate. Therefore, acetyl tributyl citrate (ATBC) plasticizer has been introduced and formulated as plasticizer in tissue conditioner; however its leachability characteristics are still unknown. Furthermore, the effect of foodsimulating liquids toward leachability of BPBG and ATBC plasticizers has not been documented. The objective of this study was to compare the effect of food-simulating liquids on the leachability of plasticizers and hardness of two experimental tissue conditioners containing BPBG and ATBC plasticizers.
MATERIALS AND METHODS: Ten experimental materials were prepared using PEMA polymer powder with 95% plasticizer (BPBG and ATBC) and 5% ethanol by volume, using powder to liquid ratio of 1.67:1, and the thickness was controlled at 3 mm. Shore A hardness value was measured after immersion in distilled water, artificial saliva, 25% ethanol/water mix, 3% citric acid, and coconut oil at 37°C. Measurements were taken at 2 hours and 1, 2, 3, 4, 7, 10, 14, 21, 28, 42, 56, and 84 days. Six readings were taken for each sample and hardness change was calculated and statistically analyzed using Wilcoxon signed-rank test.
RESULTS: Increase in hardness value was noted for both plasticizers over time with the highest increase was when immersed in coconut oil. Shore A hardness value was significantly higher in ATBC after 84 days of immersion in all food-simulating liquids. The increase in hardness is due to plasticizer/ethanol leaching; however, as ethanol content was the same (5%), the hardness change is attributed to the leaching of plasticizers.
CONCLUSION: Leaching of both plasticizers was highest in coconut oil indicating that tissue conditioners may have a shorter intraoral lifetime in patients eating high-fat diet.
Fulltext OSNC8: The 2-Dimensional Effects of Salvadora Persica (Miswak) Mechanical Brushing on Denture Base Material

Wan Ali WNS, Sapon MS, Rosdi N

J Indian Prosthodont Soc, 2018 Oct;18(Suppl 1):S32.
PMID: 30532448 DOI: 10.4103/0972-4052.244648
Fulltext Oral Health-Related Quality of Life of Adult Orang Asli in Jelebu, Malaysia: A Cross-Sectional Study

Othman WMN, Ithnin M, Wan Abdul Aziz WNA, Wan Ali WNS, Ramli H

J Int Soc Prev Community Dent, 2021 01 30;11(1):33-40.
PMID: 33688471 DOI: 10.4103/jispcd.JISPCD_336_20

Aims: This study aimed at exploring the self-perception of Orang Asli (OA) from the Temuan tribe in Jelebu by using the Global Self-rated Oral Health (GSROH) and General Oral Health Assessment Index (GOHAI).
Materials and Methods: It was a cross-sectional study involving a two-stage sampling to select the district and villages. A total of 325 participants were selected based on convenience sampling.
Results: Almost half of the participants rated their oral health as poor or average. The mean GOHAI score was 52.96 (±7.749), ranging from 29 to 60. The GOHAI score was statistically significantly lower for female gender (P = 0.025), lower education level (P = 0.001), and elderly (P = 0.001). The GSROH score was also statistically significant with GOHAI score (P = 0.001).
Conclusions: A limited number of studies were conducted in this area, particularly in the vulnerable population of OA. Our study found that half of the OA living in the fringe had a poor GOHAI score. It is, therefore, suggested that potential study and intervention programs concentrate on the low GOHAI score group; the male, lower educational context, and the elderly.
Fulltext Milled Crown on Post Crack Tooth Syndrome as the Denture Abutment Tooth: A Case Report

Mahalil Amin SS, Keat Hon JC, Sabarudin MA, Wan Ali WNS, Mohamed N

Cureus, 2023 May;15(5):e39380.
PMID: 37362455 DOI: 10.7759/cureus.39380

This clinical case describes using a milled crown on a cracked tooth as the abutment for a removable partial denture. A 63-year-old male patient diagnosed with lipoma undergoing chemotherapy and radiotherapy presented with symptomatic crack tooth syndrome on tooth 36 and partial edentulism. Conservative treatment using a molar band to extracoronally splint the tooth was conducted to determine the prognosis of the crack line. A lower partial cobalt-chromium denture was constructed by incorporating the milled crown of tooth 36 as the abutment. After six months of follow-up, there were no crack tooth symptoms, and regular review was adopted to monitor the tooth. The construction of a milled crown of a cracked tooth presented good and promising clinical outcomes in preserving tooth vitality and preventing crack propagation in partially dentate dentition for the long term.