• 제목/요약/키워드: Oral microbial

검색결과 198건 처리시간 0.029초

A novel retentive type of dental implant prosthesis: marginal fitness of the cementless double crown type implant prosthesis evaluated by bacterial penetration and viability

  • Hong, Seoung-Jin;Kwon, Kung-Rock;Jang, Eun-Young;Moon, Ji-Hoi
    • The Journal of Advanced Prosthodontics
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    • 제12권4호
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    • pp.233-238
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    • 2020
  • PURPOSE. This study aims to compare the marginal fitness of two types of implant-supported fixed dental prosthesis, i.e., cementless fixation (CL.F) system and cement-retained type. MATERIALS AND METHODS. In each group, ten specimens were assessed. Each specimen comprised implant lab analog, titanium abutment fabricated with a 2-degree tapered axial wall, and zirconia crown. The crown of the CL.F system was retained by frictional force between abutment and relined composite resin. In the cement-retained type, zinc oxide eugenol cement was used to set crown and abutment. All specimens were sterilized with ethylene oxide, immersed in Prevotella intermedia culture in a 50 mL tube, and incubated with rotation. After 48 h, the specimens were washed thoroughly before separating the crown and abutment. The bacteria that penetrated into the crown-abutment interface were collected by washing with 500 µL of sterile saline. The bacterial cell number was quantified using the agar plate count technique. The BacTiter-Glo Microbial Cell Viability Assay Kit was used to measure bacterial adenosine triphosphate (ATP)-bioluminescence, which reflects the bacterial viability. The t-test was performed, and the significance level was set at 5%. RESULTS. The number of penetrating bacterial cells assessed by colony-forming units was approximately 33% lower in the CL.F system than in the cement-retained type (P<.05). ATP-bioluminescence was approximately 41% lower in the CL.F system than in the cement-retained type (P<.05). CONCLUSION. The CL.F system is more resistant to bacterial penetration into the abutment-crown interface than the cement-retained type, thereby indicating a precise marginal fit.

Analyzing of the Essential Oil Chemical Constituents in Artemisia lavandulaefolia and its Pharmacological Property on Antibacterial Activity

  • Kim, Kyong-Heon;Kim, Baek-Cheol;Lee, Hwa-Jung;Jeong, Seung-Il;Kim, Hong-Jun;Ju, Young-Sung
    • 한방안이비인후피부과학회지
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    • 제17권3호
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    • pp.26-32
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    • 2004
  • Objective: The aim of this work is to investigate the antibacterial activity of the essential oil obtained from Artemisia lavandulaefolia (A. lavandulaefolia), as the development of microbial resistance to antibiotics make it essential to constantly look for new and active compounds effective against pathogenic bacteria. Method: The aerial parts of A. lavandulaefolia (1 kg) were subjected to steam distillation for 3 h, using a modified Clevenger type apparatus in order to obtain essential oil. Diethyl ether was the extracting solvent kept at 25?. The essential oil were analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The essential oil and the composition were tested for antimicrobial activities against 15 different genera of oral bacteria. Ninety-nine compounds accounting for 94.74$\%$</TEX> of the oil were identified. The main compounds in the oil were 1,8-cineole (5.63$\%$), yomogi alcohol (4.49$\%$), camphor (4.92$\%$), a-caryophyllene (16.10$\%$), trans-a-famesene (5.09$\%$), a-terpineol (3.91$\%$), borneol (5.27$\%$), cis-chrysanthenol (6.98$\%$), and a-humulene oxide (3.33$\%$). The essential oil and its compounds were tested for antimicrobial activity against 10 different genera of oral bacteria. Conclusion: The essential oil of A. lavandulaefolia exhibited considerable inhibitory effects against all obligate anaerobic bacteria (MICs, 0.025 - 0.05 ㎎/ml) tested, while their major compounds demonstrated various degrees of growth inhibition

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Oleanolic acid(OA)의 Streptococcus mutans에 대한 저해효과 (Identification of Inhibitory Effect on Streptococcus mutans by Oleanolic Acid)

  • 윤요한;최경희
    • 생명과학회지
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    • 제20권3호
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    • pp.321-325
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    • 2010
  • 구강에 상주하는 미생물 중, Streptococcus mutans는 충치 및 치주염의 원인인 치아플라그를 형성하는데 중요한 역할을 한다. Phytochemical은 식물에서 추출된 화학성분으로서, 사람의 건강에 유익한 영양물질로서 많은 연구들이 진행되어왔다. 본 연구는 이 phytochemical이 중요 구강미생물인 S. mutans에 대한 효과를 살펴보았다. 최근에 Thomson seedless raisin에서 여러 phytochemicals가 추출되었는데, 그 중 oleanolic acid (OA)와 5-(hydroxymethyl)-2-furfural (HF)의 임상적으로 중요한 여러 미생물에 대한 항균활성효과를 확인한 결과, OA가 그람음성균들에게는 항균활성효과가 나타나지 않았고, 그람양성균들에만 항균활성효과를 보였다. 그러나, HF의 경우에는 모든 균주에 대해 항균활성을 나타내지 않았다. 또한, OA는 S. mutans 균주의 표면부착과 생균막의 형성을 저해하기도 하였다. 따라서, 이 연구결과들은 OA가 치아에 존재하는 S. mutans의 생육 및 여러 생리적 특성들을 저해하므로 항플라그제나 항충치약으로서의 활용가능성을 확인할 수 있었다.

Effects of Cinnamaldehyde on Salivary Gland Tissue in Xerostomia Model

  • Choi, Ja-Hyeong;Lee, Jung-Hwa;Kim, Yeon-Hwa;Hyun, Kyung-Yae;Park, Chung-Mu;Lee, Min-Kyung
    • 대한의생명과학회지
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    • 제26권2호
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    • pp.93-100
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    • 2020
  • Xerostomia is a relatively common oral disease that causes various problems such as pain, discomforted, tissue damage, and infection. When the activity of AQPs, which plays an important role in the microbial channel transmembrane activity in tissues, decreases saliva secretion and the oral cavity dryness occurs. In this study, we observed whether there was a change in tissue through the expression level of AQP-5 in the submandibular gland in the 4-DAMP-induced xerostomia model. First, in order to construct a xerostomia model, 4-DAMP (1 mg/kg) and 20% urethane (0.5 mL/kg) were administered intraperitoneal (i.p.) to experimental animals. To observe the changes in the submandibular gland was excised, H&E staining was performed and protein quantitation analysis was performed using the submandibular tissue to observe the changes in AQP5 protein expression involved in changes in saliva secretion. Also, cinnamaldehyde (5, 12.5, 25 and 50 mg/kg) dissolved in 20% DMSO, in distilled water for each concentration, and then orally administered at a dose of 1 mL for biopsy and protein quantitative analysis. As a result, it was observed that the submandibular tissue, a model of xerostomia was wider than the naïve group. And then western blot analysis, the expression level of AQP5 decreased in the 4-DAMP group compared to the naïve group, and the expression increased in the group administered orally with cinnamaldehyde. Therefore, administration of 4-DAMP resulted in histological changes for xerostomia, and cinnamaldehyde would be a material that can be developed by reducing xerostomia.

Quality Control of Majoon-e-Nisyan and its Acute Oral Toxicity Study in Experimental Rats

  • Shaikh, Masud;Husain, Gulam M.;Naikodi, Mohammed Abdul Rasheed;Kazmi, Munawwar H.;Viquar, Uzma
    • 셀메드
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    • 제11권1호
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    • pp.2.1-2.8
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    • 2021
  • The clinical condition Amnesia causes difficulty in learning new information and the inability to recall past events. It is primarily concerned with recent memory loss. Majoon-e-Nisyan (MJN) is a polyherbal Unani formulation, present in a semi-solid form. It is widely used potent drug of the Unani System of Medicine (USM) for treating Nisyan (amnesia). In the present study polyherbal Unani formulation, MJN has been studied for its quality control and acute toxicity. Standardization (quality control) of drugs deals with drug identity, drug quality and purity determination. Standardization of MJN had been done as per the Unani pharmacopoeial parameters approved by World Health Organization (WHO) - Pharmacognostical parameters, Physico-chemical parameters, high-performance thin-layer chromatography (HPTLC), microbial load, aflatoxin, and heavy metals. Solvents and chemicals used in the study were of analytical grade and used instrument were calibrated. By conducting an acute oral toxicity study in rats, the safety of MJN was assessed. The limit test method of OECD guideline 425 was followed in the study. Results of standardization and standard operating procedures (SOPs) for preparation of MJN may serve as the standard reference in the future. The data generated in the study for the quality control of MJN proved the quality of formulation and shows that MJN is not toxic in rats following acute dosing up to 2000 mg/kg bw. The data obtained in the paper for MJN may be used as a standard guideline for preparation of the formulation which can save time, cost, and resources for future research endeavours.

Modern Possibilities and Prospects of Nanotechnology in Dentistry

  • Sergiy, Chertov;Valery, Kaminskyy;Olha, Tatarina;Oleksii, Mandych;Andrii, Oliinyk
    • International Journal of Computer Science & Network Security
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    • 제22권10호
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    • pp.97-106
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    • 2022
  • Objective. Nanotechnology is spreading among all areas of life, from everyday devices to medicine. The concept of nanotechnology argues that not only can new physical and chemical properties of materials be discovered, but also the new potential of nanostructures when reduced to the nanoscale. The growing interest in the application of nanomaterials in dentistry contributes to the proliferation of the range of nanomaterials used by specialists. The purpose of this review of information sources was to analyze the prospects for the use of nanomaterials in dentistry. Methods. We used the bibliographic semantic method of research, for which we analyzed electronic databases of primary literature sources Scopus, Web of Science, Research Gate, PubMed, MDPI, and MedLine. English-language scientific articles published after 2017 were taken into consideration. Results. According to the results of a search study among modern information primary sources, nanotechnology improves the preventive properties of oral care products, improves the structural-mechanical and aesthetic properties of composite mixtures for dentistry, overcomes the problems of the clinical application of dental implants. Despite the prospects of nanotechnology applications in medicine in general and dentistry in particular, the existing economic and technological problems require a thorough solution for further implementation of nanostructures. Scientific novelty. For the first time, the analysis of modern trends in the application of nanotechnology in dentistry is carried out and the peculiarities of materials are highlighted, the problems and prospects of nanostructures implementation in modern dental implantology are given, physical, chemical, mechanical, and antibacterial properties of nanomaterials are evaluated. The effect of nanomaterials on the microbial adhesion of the tooth or implant surface is described. Practical significance. The presented publication can become a scientific basis for the solution of urgent problems hindering the introduction of nanotechnology into dental practice. Conclusions. Thus, the use of nanostructures opens up great opportunities for the treatment of a wide range of diseases, not only of dental nature but also in medicine in general.

Phytotherapy in periodontics as an effective and sustainable supplemental treatment: a narrative review

  • Abeer Saad Gawish;Mohammed Sherif ElMofty;Safa Jambi;Doaa Felemban;Yassmeen SalahEldin Ragheb;Shadia Abdelhameed Elsayed
    • Journal of Periodontal and Implant Science
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    • 제54권4호
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    • pp.209-223
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    • 2024
  • Purpose: Periodontal disease is a chronic condition caused by microbial infection and mediated by the host's immune response. Phytotherapy is a therapeutic approach that utilizes a renewable resource capable of supplying less expensive medicines for the world's growing population. This review aimed to present clinical evidence on the use of complementary medicinal herbs in the treatment of periodontal diseases. Methods: Different databases were searched using the terms "herbal" and "periodontitis." All included studies were examined with a focus on herbal indications, type, and prescription length. Dentists' therapeutic and prophylactic herbal prescribing habits were also assessed. Results: Various herbs such as turmeric, neem, aloe-vera, pomegranate, catechu, tulsi, cloves, lemon grass, green tea, tea tree oil, peppermint, garlic, pineapple, oak bark, babul, bakul, sage, coriander, moringa, amla, guava, and grape seed extract have been used in the treatment of periodontitis. These herbs have been reported to exhibit a range of therapeutic effects, including anti-inflammatory, antiplaque, antihalitosis, antiresorptive, antioxidant, antibacterial, antifungal, antiviral, and antimicrobial properties. These components can be utilized in various forms such as mouth rinse, gel, oil, toothpaste, aqueous extract, mouthwash, or tooth powder. Conclusions: Several readily available herbal formulations are now available on the market and have been shown to be effective as supplemental periodontal phytotherapy. However, these should be used under the supervision of a dental professional to ensure optimal benefits and effectiveness. Therefore, it is necessary to improve the understanding of suggested herbal prescription practices among dental professionals.

보철물 장착 환자의 구강 칸디다균 분포 (The Distribution of Oral Candida Species in Patient with Prosthetic Appliance)

  • 손승화;백수민;박영민
    • 치위생과학회지
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    • 제14권4호
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    • pp.477-487
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    • 2014
  • 본 연구는 보철물 장착 환자의 구강 내 C. albicans 분포에 대한 연구로 구강 Candida 감염증의 주 원인균인 C. albicans의 분포를 측정한 후 감염 위험정도의 분석을 통해 보철물 장착 환자들에게 구강건강관리의 중요성에 대한 자료로 제공하고자 연구대상자의 성별, 흡연 및 음주유무, 구강 내 보철물 종류 및 장착 기간, 1일 칫솔질 횟수에 따른 C. albicans 집락 정도를 조사하였다. 연구대상자들 중 11.6%에서 감염 1단계 이상의 분포를 보여 구강 Candida 감염 가능성을 확인하였다. 또한 타액 채취 부위별 C. albicans 분포를 분석한 결과 상악보다 하악의 설면에서, 입천장보다 혀 등이 상대적으로 높은 단계의 분포를 보였다. 성별, 흡연 및 음주유무에 따른 C. albicans 분포는 여자보다 남자가, 흡연을 하는 경우보다 흡연을 하지 않는 경우가, 음주를 하지 않는 경우보다 음주를 하는 경우에 구강 Candida 감염 단계 평균 수치가 높게 나타났다. C. albicans의 단계별 분포는 구강 Candida 감염 3단계의 분포가 여자는 관찰되지 않았지만 남자는 1.4%의 분포가 관찰되었으며, 구강 Candida 감염 2단계 이상의 분포가 흡연 및 음주를 하는 경우에는 관찰되지 않았지만 하지 않는 경우에는 각각 3.3%, 3.6%의 분포가 관찰되었다. 구강 내 보철물 중 가철성 교정장치보다 의치 혹은 임플란트를 장착한 경우 C. albicans의 분포에 더 영향을 미치고 있으며, 보철물을 1년 이상 장착한 경우에 기간이 길어질수록 구강 Candida 감염 1단계 이상의 분포가 점점 높아졌다. 단, 7~9년 장착한 경우에는 100.0%의 0단계의 분포를 보였다. 1일 칫솔질 횟수에 따른 구강 Candida 감염 단계 평균 수치를 통해 구강위생관리와 C. albicans의 분포의 상관관계를 확인하고자 하였으나 칫솔질 횟수는 직접적으로 작용하지 않는 것으로 보였다. 이상의 결과로 볼 때 보철물 장착 환자의 성별, 구강 내 부위, 보철물 종류, 보철물 장착 기간이 구강 내 C. albicans의 분포에 영향을 미치고 있는 것으로 나타났다. 향후 관련된 여러 요인들을 모두 추가, 보완하거나 다각적으로 검토하여 심도 있는 연구를 통해 구강건강을 유지 및 증진시킬 수 있는 자료를 확보하는 것이 필요하다고 생각된다.

Santalum album Linn wood and its oil: An aromatic Unani traditional medicine with versatile pharmacological activities

  • Sultana, Arshiya;Rahman, Khaleequr
    • 셀메드
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    • 제8권3호
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    • pp.14.1-14.6
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    • 2018
  • Santalum album Linn. [Family: Santalaceae] is commonly known as white sandalwood, sandal safaid and safed chandan. It is one of the most valuable trees and second costliest wood in the world. Sandalwood and its oil is extensively used in the Unani and other traditional systems of medicine as it has blood purifier, anti-inflammatory, analgesic, exhilarant, cardiotonic, antiseptic, nervine tonic and expectorant properties. It is used in skin, cardiac, liver, gastrointestinal, respiratory, integument and urogenital disorders. These uses are supported and proven by many in vitro or in vivo studies. The proven pharmacological activities of S. album are antimicrobial, anti-oxidant, anti-inflammatory, antimutagenic and anti-fatigue. The research has proven that sandal oil or its constituents have anti-microbial activity. Sandalwood oil showed skin cancer preventive effect in mice and its constituent alpha santalol showed the anticancer property. The methanolic extract of wood was confirmed for antioxidant, free radical scavenging, analgesic and anti-inflammatory activities. ${\alpha}$ and ${\beta}$ santalols present in sandal oil showed sedative effects. Sandalwood tea had a significant effect on heart muscles of frog and showed increased myocardial contractility. Its oil showed significant changes in hepatic xenobiotic metabolizing enzymes. Sandalwood oil and its major constituents showed less acute oral and dermal toxicity in laboratory animals. Hence, the aforementioned studies justify the uses of sandalwood and its oil mentioned in the classical Unani literature. However, further clinical trials are suggested to confirm its efficacy and safety in humans.

우황에 대한 문헌적 고찰 (A Literary Study on Bezoar Bovis)

  • 박승규;박재석;백승일;권기록
    • 대한약침학회지
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    • 제8권3호
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    • pp.51-55
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    • 2005
  • Objectives: Literary investigation of existing data was conducted to verify effects of Bezoar Bovis and its herbal acupuncture, and determine quality management through component analysis. Results: Following results were obtained through literary investigation. 1. Bezoar Bovis is dried cystic stone from a cattle. Its characteristics are cool, no toxicity, and bitter taste. Known actions are: quells heat and detoxifies Fire Poison, extinguishes internal movement of Liver Wind and stops convulsion, vaporizes phlegm, and opens orifice. It is mainly used for treating tremor, stroke, delirium, sore throat, oral furuncle, boil, and others. 2. Bezoar Bovis is effective for eliminating liver toxicity, protecting against brain damage, and has anti-microbial activities. 3. Bezoar Bovis is mixed with bear gall bladder and deer musk to be used as herbal acupuncture, and this mixture is effective is invigorating liver functions as well as treating arthritis, headache, and etc. 4. Principal components of Bezoar Bovis are bilirubin-type pigments and cholic acids. The amount of bilirubin can be used as a standard to determine the quality of Bezoar Bovis.