LITHUANIAN UNIVERSITY OF HEALTH SCIENCES LUHS LIBRARY REPOSITORY

Burnos mikrofloros išplitimo odontologo ortopedo darbo metu tyrimai ir infekavimo prevencijos priemonių optimizavimas

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dc.contributor.author Junevičius, Jonas
dc.date.accessioned 2017-08-21T08:08:57Z
dc.date.available 2017-08-21T08:08:57Z
dc.date.issued 2005
dc.identifier.uri http://repository.lsmuni.lt/handle/1/60007
dc.description.abstract Aim: to investigate regularities of the spread of oral microflora during manipulations performed by the dental orthopedist and evaluate the individual protection equipment and measures to prevent the spread of infections used by dentists and to improve them. Objectives 1. To investigate the formation of a spray and its spreading during preparation of the solid dental tissues. 2. To investigate the distribution of the mixture formed of the fluid of the oral cavity and cooling fluid in the work zone of the dentist’s in the course of preparation of solid dental tissues; to evaluate and optimize the effectiveness of suction systems. 3. To investigate the contamination of the plaster teeth models with oral microflora through alginate and silicon impressions and suggest the most optimal method of their disinfection. 4. To evaluate the efficacy of exposure to 0.12% chlorhexidine gluconate aqueous solution as a prophylactic agent used before starting dental procedures. 5. To determine changes in microbial contamination of the dentist’s protective face shield after preparation of the solid dental tissues. 6. To determine the level of usage of the individual protection equipment and measures to prevent the spread of infections among Lithuanian dentist. Novelty and practical significance of the research work. The following results characterize the novelty and practical significance of this research ; - an original methodology has been developed for evaluation of quantitative, qualitative and vectorial parameters of the spray cloud formed of the oral cavity and cooling fluids during the preparation of solid dental tissues; - the fact that qualitative and quantitative distribution of the oral cavity and cooling fluids in the work place of the dentist during the preparation of solid dental tissues depends mainly on the effectiveness of the suction system has been shown objectively; - effectiveness of different suction systems has been assessed an d an original extra-oral aspirator has been developed and proposed by the doctoral candidate ; its application permits to optimally reduce the contamination in the dentist‘s work zone; - it has been determined that plaster teeth models are being infected with microflora of the oral cavity through impressions used for their formation; - it was determined that the level of contamination of the alginate impressions with oral microflora was by 54% higher than analogues level of the silicon impressions. Washing with running water alone diminished the contamination of the alginate impressions by 15% and that of the silicon impressions by 52% and that a disinfectant METASYS Green & Clean AD has been an effective agent for disinfection of impressions; - it has been proved that rinsing of the oral cavity with 0.12% aqueous solution of chlorhexidine decreases the amount of microorganisms on dental impressions more than 10 times, therefore it is recommended to rinse the oral cavity before every manipulation by the dentist - it has been objectively proved that the largest part of the spray during the preparation of the teeth of the lower jaw, settles on the breast of the patient while during the preparation of teeth of the upper jaw, on the patient’s face and dentist’s clothing and face; therefore it is recommended to apply protective measures taking into account the se findings of the study; - it was found that microbial contamination of the dentists, face protective shield increases 10 times during preparation of solid dental tissues, therefore the usage of the protective shield is indispensable in the dentist‘s practice; - it has been found that Lithuanian dentists insufficiently use the individual protection equipment and measures to prevent the spread of the oral infections. Conclusions 1. During preparation of solid dental tissues, the spray cloud formed from the fluid of the oral cavity and cooling fluid, about 1.5 m in diameter, potentially containing pathogen microorganisms, contaminates the face of the dentists and of the patient, and contaminates the close workplace environment. The greater part of the spray settles on the breast of the patient during the preparation of the mandibular the teeth, and on the patient’s face and doctor’s clothing and face during the preparation of the maxillary teeth. 2. The nature of the spray formed from the fluid of the oral cavity and cooling fluid in the work zone of the dentists in the course of the preparation of solid dental tissues depends on the used suction system. The best effectiveness of the safety system is achieved by using a small-size suction pump and the extra-oral aspirator proposed by us. 3. Plaster teeth models are being infected with oral microflora through impressions, the level of their contamination dependents on the type of impression material and the method of impression disinfection. The microbial contamination of plaster models made from the alginate impressions was by 54% higher than contamination of the models made from silicon impressions. After washing the alginate impressions with running tap water the contamination of plaster models declined by 15% whereas after analogous washing of the silicon impressions, by 52%. Both plaster teeth models became not infected with microorganisms of oral cavity after their disinfection with a disinfectant METASYS Green & Clean AD. 4. Rinsing of the oral cavity with 0.12% aqueous solution of chlorhexidine gluconate diminishes the amount of microorganisms on teeth impressions more than 10 times. 5. Our study has shown that after preparation of solid dental tissues for cast crown, the microbial contamination of the dentist’s protective face shield increased 9.4 times. Therefore it is a very important reason to use equipment for individual protection from the oral infection. 6. Lithuanian dentists use individual protection means insufficiently in their everyday dental practice. Protective glasses are not used at all in their dental practice even by 16% of dentists, protective masks, by 6% of dentists. Protective glasses are being used irregularly by 22% of the dentists; whereas protective masks, even by 19% of dental doctors.
dc.language.iso lit
dc.subject Infection control
dc.subject Infekcijos kontrolė
dc.title Burnos mikrofloros išplitimo odontologo ortopedo darbo metu tyrimai ir infekavimo prevencijos priemonių optimizavimas
dc.title.alternative Investigation of the oral microflora spread in the course of work of the dental orthopedist and optimisation of measures to prevent the transmission of infection
dc.type Daktaro disertacija


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