Impact of micronutrients supplementation on bone repair around implants: microCT and counter-torque analysis in rats

The use of natural substances and micronutritional approaches has been suggested as a therapeutic alternative to benefit the bone healing associated with no side effects. Nevertheless, the influence of micronutritional interventions with therapeutic propr2414551sem informaçãosem informaçã

Influence of cone-beam computed tomography image artifacts on the determination of dental arch measurements

Objective: To compare dental plaster model (DPM) and cone-beam computed tomography (CBCT) in the measurement of the dental arches, and investigate whether CBCT image artifacts compromise the reliability of such measurements. Materials and Methods: Twenty patients were divided into two groups based on the presence or absence of metallic restorations in the posterior teeth. Both dental arches of the patients were scanned with the CBCT unit i-CAT, and DPMs were obtained. Two examiners obtained eight arch measurements on the CBCT images and DPMs and repeated this procedure 15 days later. The arch measurements of each patient group were compared separately by the Wilcoxon rank sum (Mann-Whitney U) test, with a significance level of 5% (alpha = .05). Intraclass correlation measured the level of intraobserver agreement. Results: Patients with healthy teeth showed no significant difference between all DPM and CBCT arch measurements (P > .05). Patients with metallic restoration showed significant difference between DPM and CBCT for the majority of the arch measurements (P > .05). The two examiners showed excellent intraobserver agreement for both measuring methods with intraclass correlation coefficient higher than 0.95. Conclusion: CBCT provided the same accuracy as DPM in the measurement of the dental arches, and was negatively influenced by the presence of image artifacts.To compare dental plaster model (DPM) and cone-beam computed tomography (CBCT) in the measurement of the dental arches, and investigate whether CBCT image artifacts compromise the reliability of such measurements. Twenty patients were divided into two gro842274278sem informaçãosem informaçã

Sensitometric Comparisons Of Insight And Ektaspeed Plus Films: Effects Of Chemical Developer Depletion

The aim of this study was to compare the sensitometric properties of Insight and Ektaspeed Plus radiographic films manually and automatically processed using fresh and depleted chemical solutions. Ten sets of each type of film were obtained (1 set = 5 films), 5 sets being manually processed and 5 sets being automatically processed. A total of 100 films (50 Ektaspeed Plus and 50 Insight film) were exposed and developed. The first two sets of each film type were developed in fresh chemicals (one set per each type of processing), on the first day of the experiment. The other sets were processed in the same progressively depleted solutions once a week until the end of experiment, which was completed within 4 weeks. Characteristic curves were constructed to compare the sensitometric properties of the films: contrast, latitude and speed. Processing solution depletion had different effects on manually and automatically developed films, which was confirmed by the changes in the form of the characteristic curves in the third week of the automatic processing and fourth week of the manual processing. Ektaspeed Plus showed 11% reduction in contrast values for manual processing and 53% for automatic processing, while Insight contrast values showed a reduction of 25% and 59%, respectively. Insight film, however, showed lesser loss of speed and lesser increase of latitude than Ektaspeed Plus. In conclusion, chemical depletion in automatic film processing was faster than in manual developing. In depleted chemicals, both types of films had an increase in latitude values and a decrease in speed and contrast. Insight was more resistant than Ektaspeed Plus to decrease in speed and latitude when processed using older chemicals, whereas contrast in Ektaspeed Plus was comparatively more stable.172149154Syriopoulos, K., Velders, X.L., Sanderink, G.C.H., van Ginkel, F.V., van der Selt, P.F., Sensitometric evaluation of four dental x-ray films using five processing solutions (1999) Dentomaxillofac Radiol, 28, pp. 73-79Tamburus, J.R., Lavrador, M.A.S., Radiographic contrast. A comparative study of three dental X-ray films (2001) Dentomaxillofac Radiol, 26, pp. 201-205Geist, J.R., Brand, J.W., Sensitometric comparison of speed group E and F dental radiographic films (2001) Dentomaxillofac Radiol, 30, pp. 147-152ISO 5799. Photography. Direct-exposing medical and dental radiographic film/process systems (1991) Determination of ISO speed and ISO average gradient, , International Organization for Standardization, 2nd ed. Geneva: ISO;Thunthy, K.H., Weinberg, R., Effects of developer exhaustion on Kodak Ektaspeed Plus, Ektaspeed and Ultra-speed dental films (1995) Oral Surg Oral Med Oral Pathol, 79, pp. 117-121Syriopoulos, K., Velders, X.L., Sanderink, G.C.H., van der Selt, P.F., Sensitometric and clinical evaluation of a new F-speed dental X-ray film (2001) Dentomaxillofac Radiol, 30, pp. 40-44White, S.C., Pharoah, M.J., (2000) Oral radiology, principles and interpretation, , 4th ed. Mosby: St Louis;ISO 3665. Photography. Intra-oral dental radiographic film (1996) Specification, , International Organization for Standardization, 2nd ed. Geneva: ISO;Ludlow, J.B., Platin, E., Densitometric comparisons of Ultraspeed, Ektaspeed, Ektaspeed Plus intraoral films for two processing conditions (1995) Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 79, pp. 105-113Syriopoulos, K., Velders, X.L., Sanderink, G.C.H., van Ginkel, F.V., van der Selt, P.F., Effects of developer exhaustion on the sensitometric properties of four dental films (1999) Dentomaxillofac Radiol, 28, pp. 80-88Ludlow, J.B., Platin, E., Mol, A., Characteristics of Kodak Insight, an F-speed intraoral film (2001) Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 91, pp. 120-129Casanova, M.L.S., Haiter-Neto, F., Effects of developer depletion on image quality of Kodak Insight and Ektaspeed Plus films (2004) Dentomaxillofac Radiol, 33, pp. 108-113Fletcher, J.C., A comparison of Ektaspeed and Ultraspeed films using manual and automatic processing solutions (1987) Oral Surg Oral Med Oral Pathol, 63, pp. 94-102Sposto, M.R., Tavano, O., Lopes, E.S., Sensitometric study of two developers (Kodak and Silib) for radiographic periapical dental films (1983) Estomatol Cult, 13, pp. 61-67Ribeiro, R.F., Tavano, O., Evaluation of the exhaustion of the Ray developing solution in the portable processing box (1993) Braz Oral Res (formely Rev Odontol Univ São Paulo), 7, pp. 167-171Ribeiro, A., Tavano, O., Iucif Pereira, P.P., Comparative study of Hexa solution and its degradation by sensitometric method (1994) J Appl Oral Sci (formely Rev Fac Odontol Bauru), 2, pp. 68-73Price, C., Sensitometric evaluation of a new F-speed dental radiographic film (2001) Dentomaxillofac Radiol, 30, pp. 29-34Sheaffer, J.C., Eleazer, P.D., Scheetz, J.P., Clark, J., Farman, A.G., A comparison of D-, E- and F-speed conventional intraoral radiographic films in endodontic measurement (2002) Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 93, pp. 337-34

A Wormian Bone, Mimicking an Entry Gunshot Wound of the Skull, in an Anthropological Specimen

Wormian bones (WB) are irregular small cranial ossicles found along suture lines and fontanels. In Brazil, gunshot wounds to the skull are quite common in young individuals. Nevertheless, as far as we know, this is the first report of a WB giving an erroneous aspect of gunshot entrance due to its displacement position. The present manuscript describes the case of a Brazilian young man who died due to ballistic trauma, where a gaping bony defect on the right side of the skull was thought to be the exit wound of an injury related to the destruction found on the left side, highly suggestive of firearm injury. Thus, this case study has brought to light similarities between a traumatic lesion and an orifice of a WB, with emphasis on differential diagnosis during routine anthropological examinations

Magnetic resonance imaging of the temporomandibular joint acquired using different parameters

Introduction: Magnetic resonance imaging (MRI) is considered the examination of choice for the diagnosis of abnormalities in the TMJ. Considering the difficulty in defining and standardizing the diagnostic criteria, and the need for more accurate and reliable diagnosis of conditions in the TMJ, the aim of the present study was to compare three different MRI parameters: T1-weighted, T2-weighted and proton density–weighted in the diagnosis of changes in the temporomandibular joint.Materials and Methods: Fifty magnetic resonance imaging examinations of the temporomandibular joint (100 temporomandibular joints) were conducted according to a protocol that evaluates disc position, disc function and bone abnormalities. The images were obtained bilaterally in parasagittal sections in closed and open mouth positions in the three studied parameters Three trained oral radiologists assessed all the images. Reliability of the intra- and inter-examiner response was analyzed using the concordance test (Fleiss’ kappa; α = 0.05).Results: The reliability of the response patterns between observers for different protocols varied from very good to good. Observers were less constant in their response patterns when assessing proton density–weighted images. There was very good agreement for disc morphology, cortical bone and bone structures/functions; however, there was wide variation for medullary bone marrow signs.Conclusion: T2-weighted imaging was found to be the best examination to assess the medullary bone. For evaluating of disc morphology, cortical bone and bone structures/functions, any protocol is indicated once the protocol does not interfere with the analysis.Magnetic resonance imaging (MRI) is considered the examination of choice for the diagnosis of abnormalities in the TMJ. Considering the difficulty in defining and standardizing the diagnostic criteria, and the need for more accurate and reliable diagnosis of conditions in the TMJ, the aim of the present study was to compare three different MRI parameters: T1-weighted, T2-weighted and proton density–weighted in the diagnosis of changes in the temporomandibular joint. Fifty magnetic resonance imaging examinations of the temporomandibular joint (100 temporomandibular joints) were conducted according to a protocol that evaluates disc position, disc function and bone abnormalities. The images were obtained bilaterally in parasagittal sections in closed and open mouth positions in the three studied parameters Three trained oral radiologists assessed all the images. Reliability of the intra- and inter-examiner response was analyzed using the concordance test (Fleiss’ kappa; α = 0.05). The reliability of the response patterns between observers for different protocols varied from very good to good. Observers were less constant in their response patterns when assessing proton density–weighted images. There was very good agreement for disc morphology, cortical bone and bone structures/functions; however, there was wide variation for medullary bone marrow signs. T2-weighted imaging was found to be the best examination to assess the medullary bone. For evaluating of disc morphology, cortical bone and bone structures/functions, any protocol is indicated once the protocol does not interfere with the analysis312103109Almăşan, O.C., Hedeşiu, M., Băciuţ, G., Leucuţa, D.C., Băciuţ, M., Disk and joint morphology variations on coronal and sagittal MRI in temporomandibular joint disorders (2013) Clinical Oral Investigations, 17 (4), pp. 1243-1250. , http://dx.doi.org/10.1007/s00784-012-0803-4, PMid:22868824Brooks, S.L., Brand, J.W., Gibbs, S.J., Hollender, L., Lurie, A.G., Omnell, K.A., Westesson, P.L., White, S.C., Imaging of the temporomandibular joint: A position paper of the American Academy of Oral and Maxillofacial Radiology (1997) Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics, 83 (5), pp. 609-618. , PMid:9159823Cozzollino, F.A., Rapoport, A., Franzi, A.S., Souza, R.P., Pereirta, C.A.B., Dedivitis, R.A., Correlação entre os achados clínicos e imaginológicos nas disfunções temporomandibulares (2008) Radiologia Brasileira, 41 (1), pp. 13-17. , http://dx.doi.org/10.1590/S0100-39842008000100006Larheim, T.A., Westesson, P., Sano, T., Temporomandibular joint disk displacement: Comparison in asymptomatic volunteers and patients (2001) Radiology, 218 (2), pp. 428-432. , http://dx.doi.org/10.1148/radiology.218.2.r01fe11428, PMid:11161157Lopes, S.L., Costa, A.L., Cruz, A.D., Li, L.M., Almeida, S.M., Clinical and MRI investigation of temporomandibular joint in major depressed patients (2012) Dento Maxillo Facial Radiology, 41 (4), pp. 316-322. , http://dx.doi.org/10.1259/dmfr/27328352, PMid:22517997 PMCid:PMC3729006Manfredini, D., Bonnini, S., Stellini, E., Salmaso, L., Guarda-Nardini, L., Comparison of magnetic resonance imaging findings in temporomandibular joints of the two sides (2014) Clinical Oral Investigations, 18 (2), pp. 499-506. , http://dx.doi.org/10.1007/s00784-013-0984-5, PMid:23640716Sano, T., Yamamoto, M., Okano, T., Gokan, T., Westesson, P.L., Commom abnormalities in temporomandibular joint imaging (2004) Current Problems in Diagnostic Radiology, 33 (1), pp. 16-24. , http://dx.doi.org/10.1016/j.cpradiol.2003.09.001, PMid:14712198Schiffman, E.L., Truelove, E.L., Ohrbach, R., Anderson, G.C., John, M.T., List, T., Look, J.O., The research diagnostic criteria for temporomandibular disorders. I: Overview and methodology for assessment of validity (2010) Journal of Orofacial Pain, 24 (1), pp. 7-24. , PMid:20213028 PMCid:PMC3157055Sessle, B.J., A focus on the research diagnostic criteria for temporomandibular disorders (2009) Journal of Orofacial Pain, 23 (1), pp. 5-6. , PMid:19264031Styles, C., Whyte, A., MRI in the assessment of internal derangement and pain within the temporomandibular joint: A pictorial essay (2002) British Journal of Oral & Maxillofacial Surgery, 40 (3), pp. 220-228. , http://dx.doi.org/10.1054/bjom.2001.0757, PMid:12054713Tasaki, M.M., Westesson, P.L., Isberg, A.M., Ren, Y.F., Tallents, R.H., Classification and prevalence of temporomandibular joint disc displacement in patients and symptom-free volunteers (1996) American Journal of Orthodontics and Dentofacial Orthopedics, 109 (3), pp. 249-262. , http://dx.doi.org/10.1016/S0889-5406(96)70148-8Tasali, N., Cubuk, R., Aricak, M., Ozarar, M., Saydam, B., Nur, H., Tuncbilek, N., Temporomandibular joint (TMJ) pain revisited with dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) (2012) European Journal of Radiology, 81 (3), pp. 603-608. , http://dx.doi.org/10.1016/j.ejrad.2011.01.044, PMid:21300493Wangsrimongkol, T., Manosudprasit, M., Pisek, P., Chowchuen, P., Chantaramungkorn, M., Temporomandibular joint growth adaptation and articular disc positional changes in functional orthopedic treatment: Magnetic resonance imaging investigation (2012) Journal of the Medical Association of Thailand, 95, pp. S106-S115. , PMid:2396162

Noise in subtraction images made from pairs of bitewing radiographs: a comparison between two subtraction programs

Objectives: To compare noise in subtraction images produced by two subtraction programs. Methods: Twenty-five pairs of bitewing radiographs exposed under clinical conditions were subtracted using two digital subtraction programs: X-PoseIt (XP) software and EMAGO((R))/Advanced 3.43 (EM) software. Four reference points were located between the mesial surface of the upper first premolar and the distal surface of the upper first molar (the region of interest) on the same anatomical structures using XP and EM. The standard deviation (SD) of the histogram defining the distribution of the shades of grey in the region of interest was used as the statistical parameter for comparing noise in the subtraction images created by the two subtraction programs. Results: The mean and median grey shade value was lower with EM software (126.9, 126) than with XP software (128.3, 128) (P < 0.05). For the SD, the mean value was significantly lower with XP (6.2) than with EM (7.8) (P < 0.05). The range of the SD values was larger for EM (3.6-12.8) than XP (3.3-9.9). Conclusions: The standard deviation of the grey shade histogram showed that subtraction images produced with X-PoseIt software were statistically less noisy than images produced with EMAGO((R))/Advanced 3.43 software.o TEXTO COMPLETO DESTE ARTIGO, ESTARÁ DISPONÍVEL À PARTIR DE AGOSTO DE 2015.34635736