{"title":"Antibacterial activity of microwave synthesized hydroxyapatite against cariogenic bacteria: A preliminary study","authors":"","doi":"10.1016/j.sdentj.2024.06.004","DOIUrl":null,"url":null,"abstract":"<div><h3>Introduction</h3><p>The effects of hydroxyapatite (HA) on oral bacteria and biofilm remains inconclusive, with conflicting results. Studies assessing its effect against caries-causing bacteria are limited.</p></div><div><h3>Objective</h3><p>This study aimed to explore the antibacterial activity of HA synthesized using microwave against two of the most common cariogenic bacteria, <em>Streptococcus mutans (S. mutans)</em> and <em>Streptococcus sobrinus (S. sobrinus).</em></p></div><div><h3>Methods</h3><p>HA was chemically synthesized using a microwave. To verify the existence of the crystalline phase and the calcium and phosphate content, X-ray diffraction (XRD) and energy-dispersive X-ray (EDX) analysis were employed, respectively. Reduction in bacterial growth was used to assess the antibacterial effects of 10 %, 20 %, and 30 % HA against the tested bacteria.</p></div><div><h3>Results</h3><p>The presence of the hydroxyapatite crystallite phase was verified using XRD, while EDX revealed the Calcium to Phosphorus (Ca/P) ratio to be 1.6. In response to the 10 %, 20 %, and 30 % HA, <em>S. mutans</em> were reduced by 14.5 %, 15.6 %, and 23.4 %, whereas <em>S. sobrinus</em> decreased by 17.1 %, 60.8 %, and 98.6 %, respectively.</p></div><div><h3>Conclusion</h3><p>Microwave-synthesized HA could have antibacterial properties against caries-causing bacteria with different potencies depending on concentration and bacteria.</p></div>","PeriodicalId":47246,"journal":{"name":"Saudi Dental Journal","volume":"36 8","pages":"Pages 1117-1122"},"PeriodicalIF":1.7000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S101390522400172X/pdfft?md5=1c288ca3fd339d73f60f6caab0c0bac7&pid=1-s2.0-S101390522400172X-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Saudi Dental Journal","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S101390522400172X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction
The effects of hydroxyapatite (HA) on oral bacteria and biofilm remains inconclusive, with conflicting results. Studies assessing its effect against caries-causing bacteria are limited.
Objective
This study aimed to explore the antibacterial activity of HA synthesized using microwave against two of the most common cariogenic bacteria, Streptococcus mutans (S. mutans) and Streptococcus sobrinus (S. sobrinus).
Methods
HA was chemically synthesized using a microwave. To verify the existence of the crystalline phase and the calcium and phosphate content, X-ray diffraction (XRD) and energy-dispersive X-ray (EDX) analysis were employed, respectively. Reduction in bacterial growth was used to assess the antibacterial effects of 10 %, 20 %, and 30 % HA against the tested bacteria.
Results
The presence of the hydroxyapatite crystallite phase was verified using XRD, while EDX revealed the Calcium to Phosphorus (Ca/P) ratio to be 1.6. In response to the 10 %, 20 %, and 30 % HA, S. mutans were reduced by 14.5 %, 15.6 %, and 23.4 %, whereas S. sobrinus decreased by 17.1 %, 60.8 %, and 98.6 %, respectively.
Conclusion
Microwave-synthesized HA could have antibacterial properties against caries-causing bacteria with different potencies depending on concentration and bacteria.
期刊介绍:
Saudi Dental Journal is an English language, peer-reviewed scholarly publication in the area of dentistry. Saudi Dental Journal publishes original research and reviews on, but not limited to: • dental disease • clinical trials • dental equipment • new and experimental techniques • epidemiology and oral health • restorative dentistry • periodontology • endodontology • prosthodontics • paediatric dentistry • orthodontics and dental education Saudi Dental Journal is the official publication of the Saudi Dental Society and is published by King Saud University in collaboration with Elsevier and is edited by an international group of eminent researchers.