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1.
Braz. j. oral sci ; 19: e200201, jan.-dez. 2020. tab
Article in English | LILACS, BBO | ID: biblio-1177450

ABSTRACT

Aim: To perform a scoped literature review on advantages of digital workflows in dentistry that could be widely adopted to address safety issues raised during the coronavirus (COVID-19) pandemic. Methods: Recent studies on any advantages of digital dentistry ­ as compared to conventional methods ­ that could help addressing the new safety demands for dental treatments that emerged due to the current pandemic were included. PUBMED, Embase, and Web of Knowledge databases were searched for eligible articles published in the last five years. The guidelines of PRISMA statement were followed during data extraction and evaluation. Results: The present search strategy yielded 181 publications. After application of exclusion criteria, a total of 34 studies were finally considered eligible to be discussed. Among the most important advantages of digital dentistry that contribute to safety during the current pandemic are: reduced number of clinical appointments required, shorter chairside time, less invasive surgeries and safer procedures. Conclusion: Within the limitations of this study, the findings observed herein suggest that the use of digital workflows in dentistry could lead to increased safety and reduced transmission of COVID-19 during the current pandemic


Subject(s)
Technology, Dental , Coronavirus Infections , Dentistry , Workflow
2.
RGO (Porto Alegre) ; 66(3): 219-224, July-Sept. 2018. tab, graf
Article in English | LILACS | ID: biblio-984906

ABSTRACT

ABSTRACT Objective: To evaluate the correlation between panoramic radiomorphometric index of bone density, stability quotient and the insertion torque of the implant. Methods: A total of 97 implants were analyzed. Panoramic radiographs calculated the Panoramic Mandibular Index and the Mental Index, in addition to the evaluation of the Mandibular Cortical Index. The insertion torque and the stability quotient of the implant were recorded during the surgical moment. The correlation analysis between the variables described above was performed using the Spearman test, at a significance level of 5%. Results: Significant correlations were found between age and mandibular cortical index (p = 0.000 and r = 0.429), insertion torque and age (p = 0.011 and r = 0.263), stability quotient of the implant in the Vestibulo-Lingual direction and The mesio-distal direction (p = 0.000 and r = 0.582), mandibular and mental panoramic index (p = 0.000 and r = 0.809), mandibular and mental cortical index (p = 0.005 and r = -0.288) and mandibular cortical index Mandibular panoramic view (p = 0.000 and r = -0.366). All other correlations were not significant (p <0.05). Conclusion: The results of this work suggest that the panoramic radiomorphometric indices may contribute to the pre-diagnosis of the primary stability of dental implants.


RESUMO Objetivo: Avaliar a correlação entre índices radiomorfométricos panorâmicos de densidade óssea, quociente de estabilidade e o torque de inserção do implante. Métodos: Foi analisado um total de 97 implantes. Nas radiografias panorâmicas, foram calculados os índices Panorâmico Mandibular e o índice Mentual, além da avaliação do índice Cortical Mandibular. O torque de inserção e o quociente de estabilidade do implante foram registrados durante o momento cirúrgico. A análise de correlação entre as variáveis descritas acima foi realizada com por meio do teste de Spearman, a um nível de significância de 5%. Resultados: Foram encontradas correlações significantes entre as variáveis idade e o índice Cortical Mandibular (p=0.000 e r=0.429), torque de inserção e a idade (p=0.011 e r=0.263), quociente de estabilidade do implante na direção Vestibulo-Lingual e a direção Mesio-Distal (p=0.000 e r=0.582), índice panorâmico mandibular e o mentual (p=0.000 e r= 0.809), índice cortical mandibular e o mentual (p=0.005 e r=-0.288) e índice cortical mandibular e o panorâmico mandibular (p=0.000 e r=-0.366). Todas as outras correlações não foram significantes (p<0.05). Conclusão: Os resultados deste trabalho sugerem que os índices radiomorfométricos panorâmicos podem contribuir para o pré-diagnóstico da estabilidade primária de implantes dentários.

3.
Braz. j. oral sci ; 15(2): 131-136, Apr.-June 2016. ilus
Article in English | LILACS, BBO | ID: biblio-848237

ABSTRACT

A number of panoramic radiographic measurements have been associated with osteoporotic alterations. However, little is known about the differences in sensitivity and specificity among these measurements for screening low bone mineral density (BMD). Aim: To correlate and compare precision, sensitivity and specificity of panoramic radiomorphometric indices and fractal dimension (FD) for screening low BMD (i.e. osteopenia and osteoporosis). Methods: Sixty-eight female patients (42.78±15.59 years) were included in this study. Body mass index (BMI), mandibular cortical index (MCI), mandibular cortical width (MCW), FD and connectivity (C) were assessed. Low BMD was diagnosed by peripheral dual-energy X-ray absorptiometry (p-DXA). Non-parametric correlations were assessed among all variables. In addition, sensitivity and specificity of MCI, MCW and FD were estimated for screening low BMD. Results: Significant correlation was found between FD and BMI (p=0.013; r=0.269). In addition, FD was the most sensitive method for screening low BMD (70.8%, p=0.001). FD and MCI presented a significant and relatively high sensitivity, whereas MCW presented a high specificity for screening low systemic BMD Conclusions: Among the analyzed methods, FD and MCI offer a significant and relatively high sensitivity, whereas MCW offers a high specificity for screening low BMD (Au)


Subject(s)
Humans , Female , Bone Density , Bone Diseases, Metabolic/diagnosis , Osteoporosis/diagnosis , Radiography, Dental, Digital , Radiography, Panoramic , Body Mass Index , Mandible/diagnostic imaging
4.
Clin. lab. res. dent ; 20(3): 160-165, jul.- set. 2014. ilus, graf, tab
Article in English | LILACS | ID: lil-730182

ABSTRACT

A ultrassonografia é um recurso de imagem para a finalidade de diagnosticar lesões e para avaliar o grau de vascularização intraóssea de tumores. No entanto, lesões intraósseas podem representar um desafi o devido à espessura de osso circundante que poderá impedir a captura do sinal de ultrassom. O objetivo deste estudo foi avaliar a infl uência da espessura óssea na captura do sinal de eco dos vasos utilizando a ultrassonografi a. Hemimandíbulas maceradas suínas (n = 20) com espessuras ósseas diferentes foram adaptadas para receber tubos de borracha tipo CFlex ligados a um capilar de vidro, por onde água foi conduzida por meio de uma bomba para simular a vascularização sanguínea. A ultrassonografi a Doppler foi usada para avaliar o fl uxo de sangue na região do canal mandibular ao nível dos dentes molares. O teste t de Student foi utilizado para avaliar as diferenças entre as espessuras de osso das hemimandíbulas por meio de sinal negativo e sinal positivo do ultrassom. A reprodutibilidade e a confi abilidade foram confi rmadas para as análises. O sinal de fl uxo simulado foi capturado em ossos corticais com espessura na faixa de 0,2 a 1,0 mm (0.59 0.42 mm), mas não foi capturado a uma espessura superior a 1,0 mm (1.39 0.59 mm). Concluindo, a ultrassonografi a pode ser usada para investigar a vascularização intraóssea em áreas mandibulares com uma espessura óssea vestibular de até 1,0 mm.


Ultrasonography is useful to diagnose lesions, insofar as it detects the type of injury, and to assess the degree of vascularization of tumors. However, intraosseous lesions may represent a challenge, since the surrounding bone thickness could prevent ultrasound signal capture. The aim of this study was to evaluate the infl uence of surrounding bone thickness on the ability of ultrasonography in capturing the echo signal of blood vessels. Macerated porcine hemimandibles (n = 20) with different buccal bone thicknesses were prepared and adapted to receive CFlex-type rubber tubes connected to a glass capillary through which pump-driven water was conducted to simulate blood vasculature. Doppler ultrasonography was used to assess the blood fl ow in the region of the mandibular canal at the level of the molar teeth. Student’s t-test was used to assess differences between the bone thicknesses of hemimandibles with a negative and with a positive ultrasound signal. The presence of the echo signal in the simulated vasculature was assessed by ultrasonography. Reproducibility and reliability were confi rmed for the analyses. The simulated fl ow signal was captured in cortical bones with a thickness in the 0.2–1.0 mm range (0.59 ± 0.42 mm), but was not captured in those with a thickness greater than 1.0 mm (1.39 ± 0.59 mm). In conclusion, ultrasonography can be used to investigate intraosseous vascularization in mandibular areas with a buccal bone thickness up to 1.0 mm.


Subject(s)
Diagnostic Imaging , In Vitro Techniques , Bone and Bones/blood supply , Ultrasonography , Ultrasonography, Doppler
5.
São Paulo; s.n; 2014. 62 p. ilus, tab. (BR).
Thesis in Portuguese | LILACS | ID: lil-758275

ABSTRACT

Um dos principais fatores que influencia os resultados da terapia de implantes dentários é a densidade do osso alveolar. A sua avaliação permitiria a predição do torque de inserção do implante levando a um planejamento preciso do tratamento. O presente estudo de coorte teve como objetivo definir e correlacionar características radiográficas e morfológicas do osso, e sua influencia no torque de inserção. Foram analisados dados demográficos, radiografias panorâmicas e tomografias computadorizadas por feixe cônico (TCFC) de um total de 25 pacientes que receberam 31 implantes. Amostras ósseas retiradas dos sítios implantares foram avaliadas com densitometria óssea, micro-tomografia computadorizada, e histomorfometria. A análise de escala de cinzas avaliada com a TCFC foi fortemente correlacionada com a microtomografia computadorizada (r=0,504, p=0,004) e com a histomorfometria (r=0,795, p=0,001). No entanto, os resultados da correlação de Spearman mostraram que o torque máximo de inserção foi fortemente correlacionado com a espessura cortical do rebordo (r=0,609, p=0,001). Os resultados indicam que o torque de inserção é influenciado principalmente pela camada cortical do osso alveolar. O trabalho propõe ainda uma classificação clínica de predição de torque, baseada em resultados de sensitividade e especificidade da combinação de variáveis diferentes. A TCFC de 14-bit foi indicada como confiável para avaliar a densidade do tecido ósseo alveolar através da escala de cinzas...


A main factor influencing dental implant therapy outcomes is the alveolar bone density. Its assessment would allow for prediction of implant insertion torque (IT), leading to a precise treatment planning. The present cohort study aimed to define and correlate imaging and morphometric bone features influencing IT. Demographics, panoramic radiographs and cone beam computed tomographic (CBCT) scans of a total of 25 patients receiving 31 implants were analyzed. Bone samples retrieved from implant sites were assessed with dual x-ray absorptiometry, micro-computed tomography, and histomorphometry. Grayscale analysis using CBCT was strongly correlated with micro-computed tomography and with histomorphometric analysis (r=0.795, p=0.001). However, Spearmans correlation results showed that peak IT was strongly correlated with ridge cortical thickness (r=.609, p=.001). These results indicate that IT is mainly influenced by the amount of alveolar cortical bone layer. This work further propose a clinical classification for IT prediction, based on findings of sensitivity and specificity of the combination of different variables. 14-bit CBCT was indicated as reliable to assess alveolar bone density using grayscale analysis...


Subject(s)
Humans , Male , Female , Bone Density/physiology , Dental Implants , Alveolar Bone Loss/diagnosis , Radiography, Panoramic/methods , Cone-Beam Computed Tomography/methods
6.
Ortodontia ; 46(5): 513-516, set.-out. 2013.
Article in Portuguese | LILACS, BBO | ID: lil-714221

ABSTRACT

Um dos fatores comumente encontrados em pacientes na Odontologia é a ocorrência de sorriso gengival e mordida profunda, que por sua vez pode ser causada pela presença de dentes extruídos. Tratamentos convencionais com o arco utilidade demandam considerável tempo clínico e podem causar a extrusão de molares. No entanto, outra opção para estes casos tem sido descrita na literatura nos últimos 20 anos, embora por poucos estudos, sendo esta o uso de mini-implantes. O presente trabalho visou revisar a literatura atual relativa ao uso de mini-implantes na intrusão de dentes anteriores, por meio de uma análise de artigos disponíveis nas bases de dados Web of Science, MedLine, e Scopus, entre 1991 a 2012. Como conclusão, o uso de mini-implantes pode representar uma simples e importante alternativa para casos de sorriso gengival e mordida profunda, não dependendo da cooperação do paciente.


One of the factors commonly found in patients in dentistry is the occurrence of gummy smile and overbite, which in turn can be caused by the presence of extruded teeth. Conventional treatments with the utility arch require considerable time and may cause the extrusion of molars. Another option for such cases, which has been reported in the literature over the past 20 years by a few studies, is the use of mini-implants. This study aimed to review the current literature on the use of mini-implants in the anterior teeth intrusion, through an analysis of available articles in the Web of Science, MedLine and Scopus databases from 1991 to 2012. In conclusion, the use of mini-implants may represent a simple and important alternative for cases of gummy smile and deep bite, not depending on the patient's cooperation.


Subject(s)
Dental Implants , Tooth Movement Techniques , Orthodontic Anchorage Procedures , Overbite
7.
Braz. j. oral sci ; 11(2): 116-119, abr.-jun. 2012. ilus
Article in English | LILACS, BBO | ID: lil-654831

ABSTRACT

The development of oral implantology has led to the establishment of various image-acquisitionmethods as important surgical diagnosis tools, such as linear (LT) and cone beam computedtomography (CBCT), indicated for planning implant placement surgeries. However, there still islittle information in the literature regarding details on the difference between the accuracy of thesemethods. Aim: The aim of the present study was to assess the difference between the accuracyof LT and CBCT in measuring ridge bone width. Methods: A sample of ten human skulls wasused, totaling 40 edentulous sites, marked with 2-mm gutta-percha balls in the buccal and lingualplates. Buccal-lingual measurements of ridge width were performed on the images of bothtomography types. Direct caliper measurements were used as control values, to which all LT andCBCT measurements were compared. Results: CBCT images showed significantly more accurateresults in comparison with the direct caliper measurements (p<0.05). Conclusions: CBCTproved more reliable than LT regarding ridge bone measurements for dental implant planning.


Subject(s)
Cone-Beam Computed Tomography , Dental Implants , Tomography
8.
ImplantNews ; 6(1): 65-68, 2009. ilus
Article in Portuguese | LILACS, BBO | ID: lil-523905

ABSTRACT

A deiscência é uma das possíveis complicações pós-operatórias. Trata-se da abertura espontânea de suturas, que pode vir concomitantemente a eventos como a exposição óssea. Sabe-se que ela pode ser tratada por métodos específicos ou pela simples remoção do material necrótico presente e abundante irrigação com solução fisiológica, permitindo assim condições para a regeneração tecidual. No caso clínico presente, houve a oportunidade de realizar a estimulação da reparação tecidual através de focos de sangramentos provocados, associado ao tratamento convencional da deiscência em região peri-implantar da mandíbula. E após um acompanhamento de cerca de três meses foram apresentados resultados satisfatórios que culminaram com a confecção de uma nova prótese reabilitando o paciente. Este relato de caso mostra que existem diversas maneiras para tratar a deiscência e obter sucesso e ressalta a importância do acompanhamento freqüente do paciente.


Subject(s)
Humans , Male , Adult , Dental Implants , Surgical Wound Dehiscence , Sutures
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