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Common Intra Oral Radiographic Errors Made by Dental Students  [cached]
Abdolaziz Haghnegahdar,Pegah Bronoosh,Mohamad Mehdi Taheri,Amin Farjood
Galen Medical Journal , 2013,
Abstract: Background: Retakes of intra oral radiographs happen frequently in dental practice although radiographic courses train dental students in consecutive semesters. To reduce the patient exposure as much as possible it is mandatory to reduce the number of retakes both in radiology clinics and educational centers.Materials and Methods: 3188 periapical radiographs taken by bisect-angle technique was evaluated in this cross-sectional study to assess the frequent errors necessitating retakes. Views were taken by fourth year dental students using bisect angle method. Errors were tabled according to site and type.Results: The four major errors that were found in the study included incorrect film placement (35.4%), cone cutting (18.2%), incorrect horizontal angulation (16.6%), and incorrect vertical angulation (14.4%). The distribution of technical errors by anatomic location was identified. Maxillary molar area was the most occurring site for errors.Conclusion: These results suggest that educational programs may be re-evaluated to make the best benefit of educational courses involving both dental and hygiene students.
An Evaluation of Infection Control in Dental Offices and Dental Clinics in Isfahan (2003)
M Razavi,A Motaghi,M Sajadi,M Jahanbakhsh
Journal of Isfahan Dental School , 2007,
Abstract: Introduction: Increasing contagious and infectious disease in recent decays, have made persons involving in health and hygiene to follow a certain path of instructions and disciplines.Dentists and their Co-Workers can transmit the infection. prevalencing of disease such as AIDS and Hepatitis are increasing and loss of a complete study there is a brief need to do a complete study about Infection control especially in Isfahan.Methods and Materials: This was a qualitative-descriptive cross sectional study. 152 general and specialist dentists were selected randomly among 450 dentists in Isfahan during 2003. Information was gathered by a designed bisectional question which was completed partly by dentists and partly by researchers. In the next step, results were evaluated through chi-square statistical test and SPSS Program.Results: The research findings showed that there are meaningful differences among compared groups in regard to maintaining principals of infection control. Equipments, such as oven and autoclave are currents sterilization methods. There are a few people who use these two methods correctly.Conclusion: Results of the study, shows that the positive role of experience and specialization in regard to infection control is very important. But what is more important is unawareness, lack of education and proper management and expensive of material and equipments of infection control user unconfidence that is weakness of infection control. So it is recommended student will be taught and then review periods will be done with planning separate educating groups or a course unit. In addition, the quality of infection control in dentistry centers will be improved with organizing researchers and standard center and encouraging in side industries to produce materials and desirable and necessary equipments. Also hygiene will be improved with doing cultural works in regard to charging treatment goals and better view about patient.Key words: Infection control, Dental office and clinics, Sterilization
Noise Levels in Dental Offices and Laboratories in Hamedan, Iran  [PDF]
F. Mojarad,T. Massum,H. Samavat
Journal of Dentistry of Tehran University of Medical Sciences , 2009,
Abstract: Objective: Noise pollution is one of the most important situations requiring a solution by the contemporary world. The National Institute for Occupational Safety and Health has identified noise as one of the ten leading causes of work-related diseases and injuries.Dentists and dental auxiliaries are exposed to different noise levels while working in dental offices or laboratories. The purpose of this study was to measure the noise level made by different dental instruments in dental offices and laboratories.Materials and Methods: Measurement of the noise level was performed in 89 dental offices and nine dental laboratories. The noise levels were determined using a sound level meter; type SL-4011(Lutron) ,which was placed at the operator’s ear level in dental offices and laboratories and also at two-meter distance from the technician’s ear in laboratories.Results: The maximum sound level was 85.8 dB in dental offices and 92.0 dB in laboratories.In dental clinics, the highest noise was produced by the ultrasonic-scaler (85.8 dB) and the lowest noise (49.7 dB) by the high-volume aspirator, whereas in the laboratory,the highest noise was caused during grinding by the stonecutter (92.0 dB) and the lowest by the denture-polishing unit (41.0 dB).Conclusion: After close evaluation, we believe that the maximum noise level in dental offices, although often beneath the damaging noise level for the human ear, is very close to the limit of hearing loss (85.0 dB). However, laboratory technicians may be at risk ifthey choose not to wear ear protection (earplugs or earmuffs).
Radiographic and imaging diagnosis of rhinolith in dental clinics: a case report
Manzi, Flávio Ricardo;Peyneau, Priscila Dias;Piassi, Fernanda Pimenta;Machado, Vinícius de Carvalho;Lopes, Andréa Cristina;
Revista Odonto Ciência , 2012, DOI: 10.1590/S1980-65232012000200015
Abstract: purpose: rhinolith is a calcification that occurs in the nasal cavity and may be discovered during routine radiographic exam. this calcification is rare, generally single, exogenous or endogenous, unilateral, and asymptomatic. it can cause nasal obstruction, fetid odour and purulent secretion. this study reported a case of rhinolith and its radiographic features. case description: a female, 14-year-old patient had a radiopaque mass in the right nasal cavity. the primary treatment plan included oral surgery to remove a supposed impacted supernumerary tooth, which diagnosis was based on conventional radiographic exams. after an unsuccessful surgery, additional exam with computed tomography showed images compatible with a rhinolith. conclusion: computed tomographic scans are required for differential diagnosis of pathologies in the nasal cavity to provide proper treatment.
Clinical justification of dental radiology in adult patients: A review of the literature
Martínez Beneyto,Yolanda; Alcaráz Ba?os,Miguel; Pérez Lajarín,Leonor; Rushton,Vivian E.;
Medicina Oral, Patología Oral y Cirugía Bucal (Internet) , 2007,
Abstract: although the radiological doses used by dentists are low individually, patients are often exposured to many repeat dental radiographic examinations. the ?routine? use of dental radiography, such as screening of all patients using dental panoramic radiography (dprs) or a random decision to take a dental radiograph, will inevitable lead to unnecessary patient exposure. the use of radiographic referral criteria has now become a legal requirement for all practitioners following the adoption of european legislation. all exposures to x-rays should be clinically justified and each exposure should be expected to give the patient a positive net benefit. recently the european commission has published guidelines (1) on radiation protection in dental radiology. guidelines have previously been available in a number of european countries (2,3) and also within the united states (4,5). at the present time, no specific guidelines have been published within spain. the aim of this review article is to provide the spanish dentist with guidance as to the appropriateness of different radiographic techniques for a variety of clinical conditions and also the frequency with which they should be taken. it is hoped that this document will act as a useful work tool in daily dental practice.
Patient dose from radiographic rejects/repeats in radiology centers of Urmia University of Medical Sciences, Iran  [PDF]
Nasrollah Jabbari, Ahad Zeinali, Leili Rahmatnezhad
Health (Health) , 2012, DOI: 10.4236/health.2012.42015
Abstract: Medical diagnostic X-rays are the largest manmade source of ionizing radiation received by the members of the general public. The aim of this study was to evaluate the radiographic reject/repeat rate and also to determine dose to the patients from radiographic rejects/repeats in radiology centers of Urmia University of Medical Sciences. During a 4 month period the most frequently examinations were chosen in three radiology centers. A form was designed as a reject/repeat analysis form for radiographers to complete each time a film was rejected by radiologists or repeated. The collected data were compiled at the end of each week and entered into a computer for analysis at the end of study. The results of this study showed that highest and lowest repetition rates were for pelvis, 14.01% and upper limb, 4.17%, respectively. The main reasons of repetition of radiographs were due to exposure (54%) and positioning (18%) errors. The average repeat rate in all three hospitals was 7.20%. It was found that human error has important role to repetition of radiographs. It is demonstrated that those patients having repeated radiographs received an average of 3.23 Gy·cm2. Based on the findings of this study it must be remembered that the highest repetition rate was for pelvis. Considering the radiosensitive organs related to pelvis especially in pediatric patients some special considerations must be applied for pelvis examinations.
Evaluation of mercury vapor in dental offices in Tehran
Hasani Tabatabaei M.,Golbabaei F.,Shariati B.
Journal of Dental Medicine , 2007,
Abstract: Background and Aim: Dental Amalgam is a common restorative material for posterior teeth. Because of Hg content in the composition of amalgam, during the handling of material, mercury may release as vapor in the environment. Excess amount of mercury vapor can cause serious health problems in dental personnel. The aim of this investigation was to determine mercury vapor concentration in working environment of dentists in Tehran. Materials and Methods: 211 dental clinics were participated in this cross-sectional study. The clinics were randomly selected from different regions of Tehran (north, center, south, east and west). The dentists were asked to complete a questionnaire including items on demographic characteristics such as age, sex and work history, method of handling of amalgam, environmental characteristics and general health conditions. Environmental measurements of mercury vapor in dentists’ offices were done by mercury absorption tubes (Hydrar) and personal pumps (SKC, 222-3, England) as suggested in NIOSH method. Analysis of air samples was done by atomic absorption spectrophotometery (cold vapor). The data were analyzed by non-parametric tests (Kruskall Wallis, Mann-Whitney and Kendall).P<0.05 as the level of significance. Results: The mean mercury vapor concentration in dentists’ offices was 8.39(±9.68) μg/m3.There was no significant relationship between the urine mercury of dentists (3.107±3.95) and the air Hg vapor concentration of their offices. Using precapsulated amalgam showed significantly less Hg vapor than bulk amalgam (P=0.034). Also the surface area of working room and air Hg vapor (P=0.009) had a significant relationship (P=0.009 r=0.81). There was not any significant correlation between mercury vapor and other factors such as working hours per day and working days per week, squeezing of triturated amalgam or not, storage medium of set amalgam (water or fixer solution), mercury storage method and type of ventilation. Conclusion: The concentration of mercury vapor in dental offices' environment was lower than threshold limit value. Based on this study the type of amalgam (precapsulated or not) and area of the working room had significant effect on the mercury vapor concentration of environment.
Evaluation of awareness of dental practitioners in Bushehr of infection control techniques during dental radiographic procedures
Ehsan Hekmatian,Hosein Khalafi
Journal of Isfahan Dental School , 2012,
Abstract: Introduction: Patients, health care workers and dental practitioners are exposed to oral infections and infective microorganisms during dental imaging procedures. The aim of this study was to evaluate awareness of dental practitioners in Bushehr of infection control techniques during dental radiographic procedures.Materials and Methods: In this descriptive study knowledge of dental practitioners working in Bushehr about infection control in dental radiography was evaluated by a specially designed questionnaire. The questionnaire was distributed during continuous education conferences and was directly handed in to dental practitioners in their offices. A total of 47 dental practitioners were evaluated. Data was analyzed by descriptive statistical methods in the form of scores ranging from 0 to 100.Results: A total of 74.5% of those surveyed in the study were male and 25.5% were female. The awareness scores in relation to infection transmission pathways, infective fluids, AIDS transmission pathways, and unhealthy behaviors were higher than average. The awareness scores in relation to covering of the hands, environmental factors, how to wear new gloves, and disinfection of the hands were below average. The total mean of the correct answers to the questions was 45% with a range of 6% to 87%. In general, awareness scores of dental practitioners in Bushehr of techniques to control infection during dental radiographic procedures were at a moderate level.Conclusion: Considering the importance of infection control in dental radiographic techniques and the moderate scores of dental practitioners in Bushehr, it is necessary to place great emphasis on instructions in this regard. Key words: Awareness, Dental radiography, Infection control.
Les Offices du cinéma scolaire et éducateur à l’épreuve des publics The Educational Cinema Offices and their publics in France between the two World Wars  [cached]
Pascal Laborderie
Conserveries Mémorielles : Revue Transdisciplinaire de Jeunes Chercheurs , 2012,
Abstract: En France, dans l’entre-deux-guerres, les Offices du cinéma scolaire et éducateur constituèrent un réseau d’enseignement, d’éducation et de propagande par le cinéma. Comment évaluer les effets de ce dispositif ? Tout d’abord, nous considérons les dispositifs mis en uvre par les Offices comme une réponse à la diversité des publics, enfants ou adultes, hommes ou femmes, des mondes ouvriers ou des classes intermédiaires, des espaces ruraux ou urbains, de métropole ou des colonies. Puis l’intérêt du cinéma en matière d’enseignement devant un public d’enfants est envisagé à partir des discours des enseignants. Enfin cet article aborde la représentation des enseignants concernant la propagande pour adultes. Des discours à la réalité, il est finalement proposé que cette propagande a surtout permis de faire travailler ensemble les animateurs des Offices au moment même où les divers mouvements du centre et de la gauche étaient divisés. In France, between the two World Wars, the Educational Cinema Offices built a network of teaching, education and propaganda using cinema. How can the effects of this network be assessed? First of all, we examine the plans of action implemented by the Educational Cinema Offices as an answer to the multiplicity of the audiences, children and adults, men or women, working and middle classes, from rural or urban places, from mainland France or colonies. Then the interest of cinema as a matter of teaching in front of children is considered from speeches of teachers. Finally, this article tackles the opinion of the teachers on the propaganda for adults. From speeches to reality, we suggest that this propaganda especially made the driving forces of the Offices work together when the various movements of the centre and of the left wings were divided.
Evaluation of Radiographic Repeat Rate Data and Film Reject Analysis of Radiology Departments in Several Hospitals of Hamadan University of Medical Sciences
Simak Sabzevari,Karim Ghazikhanlou Sani
Iranian Journal of Radiology , 2011,
Abstract: Background/Objective: Rejected and repeated"nradiographies are one of the most frequent difficulties"nin radiography. The dose received by patients,"nequipment fault, costs and patients wait time increases"nby increasing film rejection and repeat rate. Moreover,"nthis leads to decreasing the care level because of the"ndelay in film report. This study aims to evaluate the"nfilm rejection and repeat rate in university-affiliated"nhospitals of Hamadan City."nMaterials and Methods: After reviewing the related"narticles about film rejection and their mentioned"nreasons for repeat rate, a checklist was designed for"nevaluating film rejection and the related reasons."nReject rate data was evaluated by study executives,"nsecretly in each hospital, for a 6-month-period and"nnoted on checklists. Statistical analysis was performed"nby descriptive statistics and related statistical tests, by"nSPSS software."nResults: The repeat rate was between 2.67% and"n6.84% (mean, 6.13%) in the evaluated hospitals. The"nmain factors of film rejection belonged to patient's"nmovement or bad condition (26.6%) and improper"nexposure factors (23.4%). The repeat rate data in"nradiography of the neck (9%) and pelvis (8.6%) was"nthe highest amount and in radiography of the chest"n(3.8%) was the lowest amount."nConclusion: Annually waste costs because of film"nrejection, other than costs related to processing"nsolutions and equipment outwearing, was calculated as"napproximately one hundred million Rials. So, special"nattention to this subject seems to be necessary."nKeywords: Film Rejects, Radiology, Repeat Rate
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