18 research outputs found
Estudo radiogrĂĄfico da prevalĂȘncia de periodontite apical e tratamento endodĂŽntico na população adulta de SĂŁo LuĂs, MA, Brasil
This study investigated the prevalence of apical periodontitis (AP) and its association with endodontically treated teeth in residents of SĂŁo LuĂs, MA, Brazil. Two-hundred complete series of periapical radiographs taken over a 10-year period (1993-2003) were retrieved from the files of four prosthesists and five periodontists. The Periapical Index (PAI) was used and the age range, sex, tooth groups, location and association with endodontic treatment (ET) were also analyzed. The Cohen Kappa and Chi-square tests were used for statistical analysis. Out of 200 patients, 135 presented at least one case of AP, which corresponds to a prevalence of 67.5%. Of the 5008 teeth examined, 296 had AP and 553 had ET. Therefore, considering the total number of teeth, AP and ET prevalences were 5.9% and 11%, respectively. Of the 553 endodontically treated teeth, 235 (42.5%) were associated with AP. Chi-square test showed a strong correlation between AP and ET (pO objetivo deste estudo foi investigar a prevalĂȘncia de Periodontite Apical (PA) e sua associação com dentes tratados endodonticamente em residentes de SĂŁo LuĂs, MA, Brasil. Foram selecionadas 200 sĂ©ries completas de radiografias periapicais de arquivos de quatro protesistas e cinco periodontistas dos Ășltimos 10 anos (1993-2003). O Ăndice Periapical (PAI) foi utilizado e a faixa etĂĄria, sexo, grupos dentais, localização de maior prevalĂȘncia e associação aos dentes com tratamento endodĂŽntico (TE) foram analisados. Os testes Cohen Kappa e qui-quadrado foram utilizados para anĂĄlise estatĂstica. Dos registros de 200 pacientes, 135 apresentavam algum caso de PA, resultando numa prevalĂȘncia de 67,5%. Do total de 5008 dentes, 296 tinham PA e 553 tinham TE. Desse modo, a prevalĂȘncia de PA foi de 5.8% e de TE foi de 11%. Dos 553 casos de dentes tratados endodonticamente, 235 (42.5%) estavam associados com PA. A faixa etĂĄria de 40 anos foi significativamente mais prevalente (p;0.05). O grupo dental mais acometido foi dos incisivos superiores (
Correlation between the Periapical Index and Lesion Volume in Cone-Beam Computed Tomography Images
Introduction: The study aimed to correlate the Periapical Index (PAI), obtained by way of periapical radiographs, with the volume of chronic periapical lesion, obtained through cone-beam computed tomography (CBCT), in the permanent teeth. Methods and Materials: Radiographs and CBCT images were selected from 35 single-rooted permanent teeth, with fully formed apices, with a diagnosis of pulp necrosis and chronic apical periodontitis that was radiographically visible. Two independent raters evaluated the radiographs on two separate occasions and classified the periapical lesions in accordance with Ărstavikâs PAI. The periapical lesion volume was calculated in the CBCT images. The correlation between the PAI and the lesion volume was calculated using Spearmanâs correlation test. Results: There was a positive, moderate correlation between the PAI and the volume (rs=0.596; P<0.001) where rs2 is equal to 0.355, showing that only 35% of the PAI variation was dependent upon the variation in periapical lesion volume. Conclusion: The radiographic evaluation of the periapical lesion does not reflect the lesionâs volumetric characteristics as the volume had a moderate effect on the choice of PAI score.Keywords: Apical Periodontitis; Cone-Beam Computed Tomography; Endodontics; Periapical Radiograph
Clinical Efficiency of Two Sequences of Orthodontic Wires to Correct Crowding of the Lower Anterior Teeth
This study compared time to correction of mandibular anterior crowding using two arch wire sequences, one with conventional nickel-titanium (NiTi) arch wires and the other with conventional and NiTi heat-activated arch wires. Twenty-two boys and girls (mean age: 16.68 ± 2.66) with moderate crowding (3â6âmm) were assigned randomly to one of two groups and followed up for five months (six assessments) when arch wires were changed. Time to crowding correction was analyzed statistically using the Kaplan-Meier method. Data were collected during the five-month follow-up, and time to correction was compared between groups using the log rank test. At the end of follow-up, mandibular crowding was corrected in 100% of the cases in the group treated with the sequence that included NiTi heat-activated arch wires, whereas about 30% of those treated with NiTi arch wires were not completely corrected. There was a significant difference in time to complete treatment between groups (log rank = 5.996; p<0.05). In the group treated with the sequence that included heat-activated wires, alignment and leveling of mandibular anterior teeth were completed earlier than in the group treated only with conventional NiTi arch wires. Clinical trial registration is found at RBR-7g5zng
COMPORTAMENTO AMBIENTAL LIGADO ĂS ATIVIDADES ODONTOLĂGICAS EM SĂO LUĂS, MARANHĂO / ENVIRONMENTAL BEHAVIOR LINKED TO DENTAL ACTIVITIES IN SĂO LUĂS, MARANHĂO, BRAZIL
Introdução: Os serviços odontolĂłgicos geram resĂduos que causam risco Ă saĂșde pĂșblica, ocupacional e ambiental e seus responsĂĄveis tĂ©cnicos devem implantar um plano de gerenciamento de resĂduos. No Brasil, a classe odontolĂłgica conhece pouco o impacto ambiental causado por suas atividades. Verificou-se a necessidade de avaliar o comportamento ambiental dessa classe no municĂpio de SĂŁo LuĂs (MA). Objetivo: Avaliar o comportamento ambiental da classe odontolĂłgica no municĂpio de SĂŁo LuĂs (MA) e verificar como Ă© realizado o esgotamento de fluidos contaminados assim como a coleta e o tratamento dos ResĂduos de Serviços de SaĂșde (RSS), produzidos por essa classe. MĂ©todos: Um questionĂĄrio foi aplicado aos cirurgiĂ”es-dentistas e foram feitas entrevistas com os representantes das empresas responsĂĄveis pelo descarte de resĂduos odontolĂłgicos, sĂłlidos e lĂquidos. ApĂłs cĂĄlculo amostral, foram selecionados 78 consultĂłrios e/ou clĂnicas odontolĂłgicas cadastrados na VigilĂąncia SanitĂĄria do MunicĂpio. Resultados: O comportamento ambiental dos dentistas estĂĄ aquĂ©m do necessĂĄrio. Observou-se que 67,6% dos dentistas nĂŁo conhecem as resoluçÔes da ANVISA - RDC 306 e CONAMA 358, que tratam do gerenciamento dos RSS. NĂŁo existe tratamento de esgoto diferenciado para os consultĂłrios. O lixo odontolĂłgico Ă© incinerado pela empresa coletora de lixo especial, sendo que 91,89% dos dentistas contratam este tipo de serviço somente por obrigação legal. ConclusĂŁo: Os cirurgiĂ”es dentistas, no municĂpio de SĂŁo LuĂs (MA), podem contribuir com o meio ambiente ao assumir sua responsabilidade ambiental, desde que sigam as normas de Gerenciamento de ResĂduos de SaĂșde e passem a realizar uma odontologia ambientalmente sustentĂĄvel, pautada por uma maior consciĂȘncia ambiental.Palavras-chave: ResĂduos odontolĂłgicos. Gerenciamento de resĂduos. Meio ambiente. AbstractIntroduction: That dental service generate waste that cause risk to the public, occupational and environmental health, its technical experts should implement a waste management plan. In Brazil, the dental profession knows little about environmental impact caused by its activities. Thus, it was observed the need to assess the environmental performance of the dental profession in SĂŁo LuĂs, MaranhĂŁo, Brazil. Objective: to evaluate the environmental performance of the dental profession in SĂŁo LuĂs, MaranhĂŁo, Brazil and checking is performed as the depletion of contaminated fluids and the collection and treatment of waste Health Services produced by this class. Methods: A questionnaire was administered to dentists and interviews with representatives of the companies responsible for the disposal of dental waste, solid and liquid. After sample size calculation, we selected 78 offices and / or dental clinics registered with the Health Surveillance Municipality. Results: It was observed that the environmental performance of the dentists is not high enough. 67.6% of dentists do not know the resolutions of ANVISA - RDC 306 and CONAMA 358 which deal with Waste Management of Health Services. According to the depletion of fluid bodies no sewage treatment for offices. The garbage is incinerated by dental company collecting garbage especially being that 91.89% of dentists hire this type of service, only by legal obligation. Conclusion: It was concluded that the dentists in SĂŁo Luis, MaranhĂŁo, Brazil, can contribute to the environment by taking their share of environmental responsibility, provided they follow the rules of Waste Management of Health and start to perform a dental environmentally sustainable, guided by greater environmental awareness.Keywords: Dental waste. Waste management. Environment
Antimicrobial action of ozonated water and photodynamic therapy with sonic activation in root canals infected with Enterococcus faecalis
New protocols are constantly being tested in the search for complete disinfection of root canals without the undesirable effects of sodium hypochlorite. This study evaluated the antimicrobial effect of ozonated water and photodynamic therapy (PDT) with s
Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System
The aim of this study was to evaluate the radiopacity of silorane and methacrylate resin composites, comparing them to the enamel, dentin, and aluminum penetrometer using a digital image. From six resin composites (Filtekâą P90, Filtek Z350, Filtek Z350 XT flow, Tetric Ceram, TPH Spectrum, and SureFil SDR flow) cylindrical disks (5 Ă 1âmm) were made and radiographed by a digital method, together with a 15-step aluminum step-wedge and a 1âmm slice of human tooth. The degree of radiopacity of each image was quantified using digital image processing. The mean values of the shades of gray of the tested materials were measured and the equivalent width of aluminum was calculated for each resin. The results of our work yielded the following radiopacity values, given here in descending order: Tetric Ceram > TPH > SDR > Z350 > Z350 flow > P90 > enamel > dentin. The radiopacity of the materials was different both for the enamel and for the dentin, except for resin P90, which was no different than enamel. In conclusion, silorane-based resin exhibited a radiopacity higher than dentin and closest to the enamel; a large portion of the methacrylate-based flow and conventional resins demonstrated greater radiopacity in comparison to dentin and enamel
Effect of Anatomical Customization of the Fiber Post on the Bond Strength of a Self-Adhesive Resin Cement
Aim. The aim of the study was to evaluate, by means of the push-out test, the effect of the anatomical customization of the fiber post on the bond strength of a self-adhesive resin cement. Methods. Twelve endodontically treated, human, upper central incisors were randomly divided into two groups (n=6): control (glass fiber posts cemented with RelyxÂź U200) and customized (glass fiber posts anatomically customized with translucent composite resin cemented with Relyx U200). The roots were sectioned into three slices, cervical, middle, and apical, and photographed with a digital camera attached to a stereomicroscopic loupe. The images were analyzed by software, for evaluation of the cement line. The slices were subsequently submitted to the push-out test until the post had completely extruded, and the fracture mode was analyzed with a stereomicroscopic loupe. Results. The results showed significant differences between the groups in the different root thirds in relation to the area occupied by air bubbles (p<0.05). Bond strength, when all the thirds are considered, was 8.77 ± 4.89âMPa for the control group and 16.96 ± 4.85âMPa for the customized group. Conclusion. The customized group showed greater bond resistance than the control group and a more uniform cement layer