HYBRID EVENT: You can participate in person at Singapore or Virtually from your home or work.

8th Edition of International Conference on
Dentistry and Oral Health

March 25-27, 2024 | Singapore
Dental 2023

Abderrahmen Merghni

Abderrahmen Merghni, Speaker at CE Accredited Dental Conferences
University of Tunis EL Manar, Tunisia
Title : Staphylococcus aureus a redoubtable pathogen associated with orthodontic treatment


The use of orthodontic appliances leads to an alteration of the oral microbiota balance. One of the direct side effects of this practice on the oral cavity is the colonization with opportunistic pathogenic bacteria such as Staphylococcus aureus. The oral cavity of orthodontic patients may act as a major, yet poorly known, a reservoir of S. aureus that can induce clinically important infections. The most commonly used materials in orthodontic appliance therapy are brackets, tubes, band materials, ligating materials, and archwires. These materials facilitate microbial adhesion, inhibit oral hygiene, and provide new retentive areas for dental plaque, which in turn predisposes the wearer to increased microbial burden and the possibility of subsequent infection. The adhesion ability and resistance of S. aureus to antimicrobial therapy, disinfecting agents, and host defenses allow this bacterium to become potentially life-threatening. Therefore, orthodontists should balance the need to provide necessary services while minimizing risk, especially for populations with high risk for severe illness. Evidence-based on the currently available studies showed that S. Aureus increased progressively during the treatment and was more in lingual orthodontic appliance than a labial orthodontic appliance. However, opposite conclusions were found in the literature about the prevalence of Staphylococcus aureus in patients treated with removable appliances compared to those treated with fixed ones. Determining how long S. aureus persists in the oral cavity after dental demand, can make it easier to predict the time limit to place implants without risk of failure. More attention is needed regarding the prevalence of opportunistic bacteria in the oral cavity of orthodontic patients especially compromised immune systems.


Abderrahmen studied Biotechnology at the Monastir University, Tunisia, and graduated with an MS in 2009. He then joined the research group of Prof. Mastouri at the Faculty of Pharmacy of Monastir, at Monastir University. He received his Ph.D. degree in 2016 at the same institution. After one year, he obtained the position of Associate Professor of Microbiology at the Faculty of Medicine of Tunis, Tunisia. He has published more than 23 research articles in SCI(E) journals.