Comparative evaluation of microleakage in Class II restorations using open vs. closed centripetal build-up techniques with different lining materials

Sawani, Shefali; Arora, Vipin; Jaiswal, Shikha; Nikhil, Vineeta

doi:10.4103/0972-0707.136450

Cited by 7 publications

(8 citation statements)

References 11 publications

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“…That being said, these comparisons are consistent with the results reported by Shepherd et al who found that whole-body LM measurement results from GE-Healthcare DXA systems were lower than Hologic systems [15]. However, our LMI reference values were higher than those proposed by Fan et al using the cross-calibrated prediction equation between Hologic and GE-Healthcare models [18]. The observed differences between sex and age-group reference values using the GE-Healthcare DXA systems compared to those created using Hologic or prediction equations are not meant to downplay the use of these references values when appropriate, but instead emphasize the need for instrumentation specific and directly measured reference values.…”

Section: Discussionsupporting

confidence: 92%

“…Fan et al used cross-calibrated equations between the Hologic and GE-Healthcare models to convert whole-body and regional bone and soft tissue measurements from the NHANES 1999–2004 dataset to reference values for the GE-Healthcare models [ 18 ]. Although this study provided an initial set of reference values for body composition measures, including total LM, LMI, and ALMI for GE-Healthcare DXA models, these are estimates and therefore it is important to develop body composition reference values obtained directly from whole-body scans using the GE-Healthcare models [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Reference standards for lean mass measures using GE dual energy x-ray absorptiometry in Caucasian adults

et al. 2017

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Body composition assessments commonly focus predominantly on fat mass, however lean mass (LM) measurements also provide useful information regarding clinical and nutritional status. LM measurements help predict health outcomes and diagnose sarcopenia, which has been associated with frailty. Dual energy x-ray absorptiometry (DXA) is an established technique used in clinical and research settings to assess body composition including total and regional LM. Currently, there are no reference values available that were derived from GE-Healthcare DXA systems directly for US adults for LM, LM index (LMI), percent LM (%LM), and appendicular lean mass index (ALMI) and it is known that whole-body and regional LM measures differ by DXA manufacturer.ObjectiveTo develop reference values by age and sex for LM measures using GE-Healthcare DXA systems.MethodsA de-identified sample was obtained from Ball State University’s Clinical Exercise Physiology Laboratory and University of Wisconsin-Milwaukee’s Physical Activity & Health Research Laboratory. DXA scans of 2,076 women and 1,251 men were completed using a GE Lunar Prodigy or iDXA. Percentiles (%ile) were calculated for all variables of interest (LM, LMI, %LM, and ALMI) and a factorial ANOVA was used to assess differences for each variable between 10-year age groups and sex, as well as the interaction between age and sex.ResultsMen had higher mean total LM, %LM, LMI, and ALMI than women (p<0.01), across all age groups. All LM variables decreased significantly over the 5 decades in men, however in women only total LM, %LM, and ALMI decreased from the youngest to oldest age groups (p<0.01).ConclusionThese reference values provide for a more accurate interpretation of GE-Healthcare DXA-derived LM measurements offering clinicians and researchers with an initial resource to aid in the early detection and assessment of LM deficits.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Reference standards for lean mass measures using GE dual energy x-ray absorptiometry in Caucasian adults

et al. 2017

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“…We also compared the reference values from this cohort to those developed by Fan et al from a previously validated cross-calibrated equation [16] to convert measurements from the Hologic for use with the GE-Healthcare models. The median %BF at each age group were lower in women in the current study (relative differences of 1.3 to 8.2%) compared to the values from Fan et al In men, differences in median %BF between the current study and Fan et al ranged from -4.3 to 0.5%.…”

Section: Discussionmentioning

confidence: 99%

“…Fan et al used these cross-calibrated equations to convert whole-body and regional bone and soft tissue measurements from the NHANES 1999–2004 dataset to reference values for the GE-Healthcare models [16]. Although this study provided an initial set of reference values for body composition measures, including %BF, trunk % fat, legs % fat, and A/G ratio for GE-Healthcare DXAs, researchers reported marginal error associated with the cross-calibrated equations [5].…”

Section: Introductionmentioning

confidence: 99%

Reference standards for body fat measures using GE dual energy x-ray absorptiometry in Caucasian adults

et al. 2017

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BackgroundDual energy x-ray absorptiometry (DXA) is an established technique for the measurement of body composition. Reference values for these variables, particularly those related to fat mass, are necessary for interpretation and accurate classification of those at risk for obesity-related health complications and in need of lifestyle modifications (diet, physical activity, etc.). Currently, there are no reference values available for GE-Healthcare DXA systems and it is known that whole-body and regional fat mass measures differ by DXA manufacturer.ObjectiveTo develop reference values by age and sex for DXA-derived fat mass measurements with GE-Healthcare systems.MethodsA de-identified sample of 3,327 participants (2,076 women, 1,251 men) was obtained from Ball State University’s Clinical Exercise Physiology Laboratory and University of Wisconsin-Milwaukee’s Physical Activity & Health Research Laboratory. All scans were completed using a GE Lunar Prodigy or iDXA and data reported included percent body fat (%BF), fat mass index (FMI), and ratios of android-to-gynoid (A/G), trunk/limb, and trunk/leg fat measurements. Percentiles were calculated and a factorial ANOVA was used to determine differences in the mean values for each variable between age and sex.ResultsNormative reference values for fat mass variables from DXA measurements obtained from GE-Healthcare DXA systems are presented as percentiles for both women and men in 10-year age groups. Women had higher (p<0.01) mean %BF and FMI than men, whereas men had higher (p<0.01) mean ratios of A/G, trunk/limb, and trunk/leg fat measurements than women.ConclusionThese reference values provide clinicians and researchers with a resource for interpretation of DXA-derived fat mass measurements specific to use with GE-Healthcare DXA systems.

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“…The dye-penetration analysis from in vitro research is often higher than the in vivo studies [ 33 ]. In the present study, using the open-sandwich technique along with hybrid glass-ionomers led to better marginal adaptation at the cervical margins compared to other intermediate layers or RBCs materials [ 34 ]. The usage and role of glass-ionomers in micro-leakage control have been investigated and compared widely with various bonding systems.…”

Section: Discussionmentioning

confidence: 99%

Comparing the Ability of Various Resin-Based Composites and Techniques to Seal Margins in Class-II Cavities

Aljamhan

Alhazzaa²,

Albakr

et al. 2021

Polymers

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Background: Resin-based composites (RBCs) provide excellent esthetics but the marginal micro-leakage in the proximal cavities remains a major concern. The aim of the present study was to assess the ability of various dental RBCs and techniques utilized for sealing deep dentin margin in class-II cavities. Methods: Box-cavities (class-II) on the distal and mesial surfaces of extracted (premolar) teeth were prepared with a gingival margin placed 1mm apical to the cemento-enamel junction. Teeth with prepared class II cavities were randomly divided into four study groups according to the type of restorative materials (conventional RBC; bulk-fill RBC; conventional RBC lined with flowable RBC and conventional RBC lined with resin-modified glass-ionomer-cement (GIC) as open sandwich-technique). Each group was further subdivided into a total-etch subgroup in which a separate etching step was performed before applying the bonding agent and a self-etch subgroup in which a self-etch adhesive system was used (n = 10). For each group, cavities were restored using the respective restorative materials and techniques, subjected to 1000 thermocycles, and placed in the methylene-blue dye. The specimen teeth were sectioned for further microscopic examination for micro-leakage. Results: The least dye penetration values were reported for group 4 (GIC) followed by the group Bulk-fill using the self-etch adhesive system (group 2b). The highest dye penetration was reported for the group Bulk-fill using the total-etch adhesive system (2a), followed by the group conventional RBC using the total-etch adhesive system). The total-etch adhesive system had significantly greater micro-leakage compared to the self-etch adhesive system (1a) (p = 0.026). Conclusions: The self-etch adhesive system significantly reduced the micro-leakage compared to the total-etch system. Bulk-fill RBC when bonded with the self-etch adhesive provided good marginal sealing ability comparable to open sandwich-technique using GIC.

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Comparative evaluation of microleakage in Class II restorations using open vs. closed centripetal build-up techniques with different lining materials

Cited by 7 publications

References 11 publications

Reference standards for lean mass measures using GE dual energy x-ray absorptiometry in Caucasian adults

Reference standards for lean mass measures using GE dual energy x-ray absorptiometry in Caucasian adults

Reference standards for body fat measures using GE dual energy x-ray absorptiometry in Caucasian adults

Comparing the Ability of Various Resin-Based Composites and Techniques to Seal Margins in Class-II Cavities

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