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The Capacity of Periodontal Gel to Occupy the Spaces Inside the Periodontal Pockets Using Computational Fluid Dynamic. Dent J (Basel) 2019; 8:dj8010001. [PMID: 31878278 PMCID: PMC7148525 DOI: 10.3390/dj8010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/08/2019] [Accepted: 12/11/2019] [Indexed: 12/03/2022] Open
Abstract
The aim of the current work is to demonstrate the capacity of a new periodontal gel to occupy the spaces inside the periodontal pockets through Computational Fluid Dynamic (CFD). The test gel consists of two resorbable medical grade polymers (PEO, Poly Ethylen Oxide and HPMC, Hydroxy Propyl Metyl Cellulose), Type I Collagen, SAP (Vitamin C), and PBS (Saline Solution), while the control gel is 14% doxyclin controlled release gel, which is used for treating periodontal pockets with probing ≥5 mm after scaling and root plaining. The study examined the fluid dynamic analysis (Computational Fluid Dynamic—CFD) of two different gels, used in dentistry to treat periodontitis, in relation to both the geometry of the periodontal pocket and the function of two different types of needles that are used to distribute the preparation. The periodontal pocket was determined by reading DICOM images taken from the patient’s CAT scan. The results show that the H42® gel comes out uniformly compared to the other gel. Moreover, it is possible to observe how the rheological properties of the gel allow the fluid to spread evenly within the periodontal pocket in relation to the geometry of the needle. In particular, H42® gel exits in a constant way both from the first and the second exit. In fact, it was observed that by changing the geometry of the needle or the type of periodontal gel, the distribution of the gel inside the pocket was no longer homogeneous. Thus, having the correct rheological properties and correct needle geometries both speeds up the gel and optimizes the pressure distribution. Currently, the literature is still lacking, therefore further studies will be needed to confirm these results.
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Validated UHPLC-MS/MS method for quantification of doxycycline in abdominal aortic aneurysm patients. Bioanalysis 2018; 10:527-539. [PMID: 29633854 DOI: 10.4155/bio-2017-0263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
AIM There is a strong evidence that doxycycline can benefit abdominal aortic aneurysms patients because of its ability to inhibit matrix metalloproteinase enzymes. There is a need for a specific quantification method for doxycycline in these patients. We report herein the development and validation of a selective, specific, simple and rapid UHPLC-MS/MS method for doxycycline. RESULTS The assay was linear (r2 > 0.994) over a concentration range of 0.010-7.005 μg/ml. This validated method has good lower limit of quantification (LLOQ) (10 ng/ml), accuracies (89.1-103.4%), precision (≤7.0%) and extraction recoveries (95.8%). Doxycycline was stable during short- and long-term storage. CONCLUSION The assay is reliable and has been successfully applied to serum samples obtained from the patients of N-TA3CT clinical study.
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Taurin S, Almomen AA, Pollak T, Kim SJ, Maxwell J, Peterson CM, Owen SC, Janát-Amsbury MM. Thermosensitive hydrogels a versatile concept adapted to vaginal drug delivery. J Drug Target 2017; 26:533-550. [PMID: 29096548 DOI: 10.1080/1061186x.2017.1400551] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Vaginal drug delivery represents an attractive strategy for local and systemic delivery of drugs otherwise poorly absorbed after oral administration. The rather dense vascular network, mucus permeability and the physiological phenomenon of the uterine first-pass effect can all be exploited for therapeutic benefit. However, several physiological factors such as an acidic pH, constant secretion, and turnover of mucus as well as varying thickness of the vaginal epithelium can impact sustained drug delivery. In recent years, polymers have been designed to tackle challenges mentioned above. In particular, thermosensitive hydrogels hold great promise due to their stability, biocompatibility, adhesion properties and adjustable drug release kinetics. Here, we discuss the physiological and anatomical uniqueness of the vaginal environment and how it impacts the safe and efficient vaginal delivery and also reviewed several thermosensitive hydrogels deemed suitable for vaginal drug delivery by addressing specific characteristics, which are essential to engage the vaginal environment successfully.
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Affiliation(s)
- Sebastien Taurin
- a Department of Obstetrics and Gynecology, Division of Gynecologic Oncology , University of Utah Health Sciences , Salt Lake City , UT , USA
| | - Aliyah A Almomen
- a Department of Obstetrics and Gynecology, Division of Gynecologic Oncology , University of Utah Health Sciences , Salt Lake City , UT , USA.,b Department of Pharmaceutics and Pharmaceutical Chemistry , University of Utah , Salt Lake City , UT , USA
| | - Tatianna Pollak
- a Department of Obstetrics and Gynecology, Division of Gynecologic Oncology , University of Utah Health Sciences , Salt Lake City , UT , USA
| | - Sun Jin Kim
- b Department of Pharmaceutics and Pharmaceutical Chemistry , University of Utah , Salt Lake City , UT , USA
| | - John Maxwell
- a Department of Obstetrics and Gynecology, Division of Gynecologic Oncology , University of Utah Health Sciences , Salt Lake City , UT , USA
| | - C Matthew Peterson
- c Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology , University of Utah Health Science Center , Salt Lake City , UT , USA
| | - Shawn C Owen
- b Department of Pharmaceutics and Pharmaceutical Chemistry , University of Utah , Salt Lake City , UT , USA.,d Department of Bioengineering , University of Utah , Salt Lake City , UT , USA
| | - Margit M Janát-Amsbury
- a Department of Obstetrics and Gynecology, Division of Gynecologic Oncology , University of Utah Health Sciences , Salt Lake City , UT , USA.,b Department of Pharmaceutics and Pharmaceutical Chemistry , University of Utah , Salt Lake City , UT , USA.,c Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology , University of Utah Health Science Center , Salt Lake City , UT , USA.,d Department of Bioengineering , University of Utah , Salt Lake City , UT , USA
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Denić MS, Sunarić SM, Kesić LG, Minić IZ, Obradović RR, Denić MS, Petrović MS. RP-HPLC assay of doxycycline in human saliva and gingival crevicular fluid in patients with chronic periodontal disease. J Pharm Biomed Anal 2013; 78-79:170-5. [DOI: 10.1016/j.jpba.2013.02.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 02/08/2013] [Accepted: 02/13/2013] [Indexed: 11/27/2022]
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Yan N, Zhang X, Cai Q, Yang X, Zhou X, Wang B, Deng X. The Effects of Lactidyl/Glycolidyl Ratio and Molecular Weight of Poly(D,L -Lactide-co-Glycolide) on the Tetracycline Entrapment and Release Kinetics of Drug-Loaded Nanofibers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:1005-19. [PMID: 21477461 DOI: 10.1163/092050611x568223] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Na Yan
- a Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Xuehui Zhang
- b Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Qing Cai
- c The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Xiaoping Yang
- d The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Xuegang Zhou
- e The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Bo Wang
- f Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Xuliang Deng
- g Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China.
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