The Open Anesthesia Journal

Formerly: The Open Anesthesiology Journal

ISSN: ― Volume ,

The Mixture of Topical Anesthetic and Chlorhexidine at the Delivery Site in Microbial Reduction Efficiency

Ratchapin Laovanitch Srisatjaluk1, *, Thanawat Kaewjiaranai1, Natthamet Wongsirichat2, 3, **
1 Department of Oral Microbiology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
2 Maha Chakri Sirindhorn Dental Hospital, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand
3 Oral & Maxillofacial Surgery, Mahidol University, Faculty of Dentistry, Nakhon Pathom, Thailand



Antimicrobial properties of some anesthetic agents have been reported which may be useful for infection control. Topical lidociane (10%) showed some extent of antimicrobial activity on oral microflora.


This study aimed to determine whether the antimicrobial efficiency of topical lidocaine can be enhanced by adding chlorhexidine.


The Lidocaine-Chlorhexidine (LD-CHX) preparation was prepared by mixing 2.0% CHX and 10% LD with various ratios. The anesthetic efficiency was tested on the oral mucosa of 26 volunteers by Pin Prick Test. Pain scores were recorded using the Numerical Rating Scale (NRS). Antimicrobial effects of 10% LD, 0.2% CHX, and LD-CHX preparations were evaluated. In vitro study was conducted against seven standard bacterial strains. For in vivo study, oral biofilms of 26 volunteers were collected by imprint technique using filter papers. Bacterial growth from the samples after applying the test solutions was compared to the control. Antimicrobial efficiency was expressed as microbial reduction scores from 4-0 (highest to lowest).


The LD-CHX preparations that had comparable anesthetic efficiency to 10% LD were those containing 9% and 8% LD. These LD-CHX preparations showed microbial reduction scores of 3 and 4 on seven bacterial strains and oral biofilms.


This study showed the antimicrobial and anesthetic effectiveness of new lidocaine-chlorhexidine preparations both in vitro and in vivo. We also confirmed the effectiveness of infection control protocol in oral surgery using CHX mouthwash prior to topical LD.

Keywords : Antimicrobial activity , Chlorhexidine , Lidocaine , Oral biofilms , Topical anesthetics , Mouthwash .

Article Information

Identifiers and Pagination:

Year: 2019
Volume: 13
First Page: 114
Last Page: 120
Publisher Id: TOATJ-13-114
DOI: 10.2174/2589645801913010114

Article History:

Received Date: 28/07/2019
Revision Received Date: 09/09/2019
Acceptance Date: 15/10/2019
Electronic publication date: 15/11/2019
Collection year: 2019

© 2019 Srisatjaluk et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Oral Microbiology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand,
Tel: +66951966454; Email: *Address correspondence to this author at the Oral & Maxillofacial Surgery, Mahidol University, Faculty of Dentistry, Nakhon Pathom, Thailand; Consultant of Walailuk University International College of Dentistry 979/42-46 Phahonyothin Road 19th floor SM Tower Phaya Thai District Bangkok10400 Thailand;
Tel: +66819095625; Email:

Track Your Manuscript:


"Open access will revolutionize 21st century knowledge work and accelerate the diffusion of ideas and evidence that support just in time learning and the evolution of thinking in a number of disciplines."

Daniel Pesut
(Indiana University School of Nursing, USA)

"It is important that students and researchers from all over the world can have easy access to relevant, high-standard and timely scientific information. This is exactly what Open Access Journals provide and this is the reason why I support this endeavor."

Jacques Descotes
(Centre Antipoison-Centre de Pharmacovigilance, France)

"Publishing research articles is the key for future scientific progress. Open Access publishing is therefore of utmost importance for wider dissemination of information, and will help serving the best interest of the scientific community."

Patrice Talaga
(UCB S.A., Belgium)

"Open access journals are a novel concept in the medical literature. They offer accessible information to a wide variety of individuals, including physicians, medical students, clinical investigators, and the general public. They are an outstanding source of medical and scientific information."

Jeffrey M. Weinberg
(St. Luke's-Roosevelt Hospital Center, USA)

"Open access journals are extremely useful for graduate students, investigators and all other interested persons to read important scientific articles and subscribe scientific journals. Indeed, the research articles span a wide range of area and of high quality. This is specially a must for researchers belonging to institutions with limited library facility and funding to subscribe scientific journals."

Debomoy K. Lahiri
(Indiana University School of Medicine, USA)

"Open access journals represent a major break-through in publishing. They provide easy access to the latest research on a wide variety of issues. Relevant and timely articles are made available in a fraction of the time taken by more conventional publishers. Articles are of uniformly high quality and written by the world's leading authorities."

Robert Looney
(Naval Postgraduate School, USA)

"Open access journals have transformed the way scientific data is published and disseminated: particularly, whilst ensuring a high quality standard and transparency in the editorial process, they have increased the access to the scientific literature by those researchers that have limited library support or that are working on small budgets."

Richard Reithinger
(Westat, USA)

"Not only do open access journals greatly improve the access to high quality information for scientists in the developing world, it also provides extra exposure for our papers."

J. Ferwerda
(University of Oxford, UK)

"Open Access 'Chemistry' Journals allow the dissemination of knowledge at your finger tips without paying for the scientific content."

Sean L. Kitson
(Almac Sciences, Northern Ireland)

"In principle, all scientific journals should have open access, as should be science itself. Open access journals are very helpful for students, researchers and the general public including people from institutions which do not have library or cannot afford to subscribe scientific journals. The articles are high standard and cover a wide area."

Hubert Wolterbeek
(Delft University of Technology, The Netherlands)

"The widest possible diffusion of information is critical for the advancement of science. In this perspective, open access journals are instrumental in fostering researches and achievements."

Alessandro Laviano
(Sapienza - University of Rome, Italy)

"Open access journals are very useful for all scientists as they can have quick information in the different fields of science."

Philippe Hernigou
(Paris University, France)

"There are many scientists who can not afford the rather expensive subscriptions to scientific journals. Open access journals offer a good alternative for free access to good quality scientific information."

Fidel Toldrá
(Instituto de Agroquimica y Tecnologia de Alimentos, Spain)

"Open access journals have become a fundamental tool for students, researchers, patients and the general public. Many people from institutions which do not have library or cannot afford to subscribe scientific journals benefit of them on a daily basis. The articles are among the best and cover most scientific areas."

M. Bendandi
(University Clinic of Navarre, Spain)

"These journals provide researchers with a platform for rapid, open access scientific communication. The articles are of high quality and broad scope."

Peter Chiba
(University of Vienna, Austria)

"Open access journals are probably one of the most important contributions to promote and diffuse science worldwide."

Jaime Sampaio
(University of Trás-os-Montes e Alto Douro, Portugal)

"Open access journals make up a new and rather revolutionary way to scientific publication. This option opens several quite interesting possibilities to disseminate openly and freely new knowledge and even to facilitate interpersonal communication among scientists."

Eduardo A. Castro
(INIFTA, Argentina)

"Open access journals are freely available online throughout the world, for you to read, download, copy, distribute, and use. The articles published in the open access journals are high quality and cover a wide range of fields."

Kenji Hashimoto
(Chiba University, Japan)

"Open Access journals offer an innovative and efficient way of publication for academics and professionals in a wide range of disciplines. The papers published are of high quality after rigorous peer review and they are Indexed in: major international databases. I read Open Access journals to keep abreast of the recent development in my field of study."

Daniel Shek
(Chinese University of Hong Kong, Hong Kong)

"It is a modern trend for publishers to establish open access journals. Researchers, faculty members, and students will be greatly benefited by the new journals of Bentham Science Publishers Ltd. in this category."

Jih Ru Hwu
(National Central University, Taiwan)

Browse Contents

Webmaster Contact:
Copyright © 2020 Bentham Open