جستجوی مقالات مرتبط با کلیدواژه « push » در نشریات گروه « پزشکی »
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Effect of the Gender and Personal Characteristics Impact on One-Handed Isometric Push-Pull Exertions
Pushing/pulling activities are known as usual and high frequent tasks in industrial sectors, especially in developing countries. Nearly, half of all manual material handling tasks is comprised of push/pull exertions, so it is essential to determine the maximum value of push/pull force exertions by Iranian workers to design the workplace optimally. A total number of 31 volunteer students (19 males and 12 females) were participated in a one-handed maximum push/pull force measurement test in standing posture. The results were measured using the Isometric Push-Pull Dynamometer. Height and weight were also recorded through interviews. Data analysis showed that the pull/push forces of women were 72% and 52% of men, but the data variation for men was higher than women. Using linear regression and Pearson correlation coefficient, it was found that there were only two strong correlations between the push force of women with body mass index (R-Sq = 75.55%) and weight (R-Sq = 74.8%) and men’s pull strength was almost independent of individual characteristics. The results of maximum push/pull can be used for improvement in workstations and push/pull tools’ design in production and services industries, in which occupational health promotion will be achieved.
Keywords: One-Handed Exertion, Push, Pull Force, BMI, Weight} -
Background. Further studies on the adhesion properties of MTA-based materials seem necessary due to their growing use in endodontic treatment. This research aimed to assess the effect of retreatment on the bond strength of MTA-based (MTA Fillapex) and epoxy resin-based (AH Plus) sealers.
Methods. ProTaper rotary files were applied to prepare the root canals of 80 human mandibular premolars. Then, the roots were randomly divided intotwo groups of A (n=40) and B (n=40), which were obturated with gutta-percha and MTA Fillapex and AH Plus sealer, respectively. In both groups, the teeth were randomly subdivided into 2 subgroups. No retreatment was carried out in subgroups A1 and B1, while subgroups A2 and B2 were retreated with rotary files and a solvent. Then, a push-out test was performed on four 2-mm slices of each tooth at a distance of 2 mm from the coronal surface after two weeks of incubation. Data were analyzed with two-way ANOVA and statistical significance was set at P Results. Regardless of the procedure followed (P Conclusion. AH Plus sealer exhibited a higher bond strength compared to MTA Fillapex. Retreatment using rotary files and chloroform had no statistically significant effect on the bond strength of sealers evaluated in this study.Keywords: MTA Fillapex, push, out bond strength, sealer, retreatment} -
Introduction
Patellar dislocation is an emergency. Vertical patellar dislocation is rare, often seen in adolescents and mostly due to sports injuries or high-velocity trauma. Few cases have been reported in the literature. Closed or open reduction under general anesthesia is often needed. We report a case of vertical locked patellar dislocation in a 26-year-old male, which was reduced by a simple closed method under spinal anaesthesia. A literature review regarding the various methods of treatment is also discussed.
Case PresentationA 26-year-old male experienced a trivial accident while descending stairs, sustaining patellar dislocation. The closed method of reduction was attempted, using a simple technique. Reduction was confirmed and postoperative rehabilitation was started. Follow-up was uneventful.
ConclusionsVertical patellar dislocations are encountered rarely in the emergency department. Adolescents are not the only victims, and high-velocity trauma is not the essential cause. Unnecessary manipulation should be avoided. The closed reduction method is simple, but the surgeon should be prepared for open reduction.
Keywords: Vertical Patellar Dislocation, Closed Reduction, Push, up, and, Rotate Method} -
IntroductionThe aim of this in vitro study was to evaluate the effect of various irrigants on the push-out bond strength of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA).
Methods and Materials: A total of 140 dentin disks with a thickness of 1.5±0.2 mm and lumen size of 1.3 mm, were randomly divided into 12 groups (n=10) and 4 control groups (n=5). The lumen of disks in groups 1, 2, 3, 7, 8, 9 were filled with CEM and groups 4, 5, 6, 10, 11, 12 were filled with MTA. Control groups were filled with CEM and MTA. Specimens were incubated at 37°C for one day in groups 1 to 6 and seven days in groups 7 to 12. After incubation the samples were divided into three subgroups (n=10) that were either immersed for 30 min in 5.5% sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX) or saline solution. The push-out bond strength values were measured by using a universal testing machine. The nature of the failures were determined by light microscope. Data was analyzed using the three-way ANOVA to evaluate the effect of material type, different irrigants and time intervals. Post hoc Tukeys test was used for two-by-two comparison of the groups.ResultsCEM cement significantly showed a higher push-out bond strength in comparison with MTA (P=0.001). The elapse of time significantly increased the bond strength (P=0.001). There was no significant difference between the irrigants used in this study (P=0.441). Bond failure was predominantly of mixed type in MTA and of cohesive type in CEM samples.ConclusionBased on this study, endodontic irrigants did not influence the push-out bond strength of MTA and CEM cement.Keywords: Bond Strength, Calcium, Enriched Mixture Cement, Irrigants, Mineral Trioxide Aggregate, Push, Out} -
Journal of Dentistry, Shiraz University of Medical Sciences, Volume:17 Issue: 2, Jun 2016, PP 128 -133Statement of the Problem: Correct proportioning and mixing are essential to ensure cements attain their optimum physical properties.PurposeThe aim of this experimental study was to evaluate the influence of various mixing techniques including manual, mechanical mixing, and ultrasonic vibration on push-out bond strength of calcium enriched mixture (CEM).Materials And MethodNinety 2-mm-thick dentin disks were prepared from single-rooted human teeth and filled with CEM mixed with manual, trituration, or ultrasonic methods. Push-out bond strength values of the specimens were measured by a universal testing machine after 3 and 21 days. The samples were then examined under a stereomicroscope at 40× magnification to determine the nature of bond failure. Data were analyzed by Kruskal-Wallis and Mann-Whitney test. (pResultsThe highest (7.59 MPa) and lowest (4.01 MPa) bond strength values were recorded in conventional method (after 21 days) and trituration method (after 3 days), respectively. There was no statistically significant difference between the three techniques in 3 and 21 days.ConclusionAccording to the results, various mixing techniques had no effect on the push-out bond strength of CEM cement.Keywords: Calcium Enriched Mixture, Push, out Bond Strength, Mixing Method, Ultrasonic}
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IntroductionThe aim of this in vitro study was to evaluate the effect of calcium hydroxide (CH) on push-out bond strength of white mineral trioxide aggregate (WMTA) and calcium-enriched mixture (CEM) cement in simulated furcation perforations.
Methods and Materials: Furcation perforations, measuring 1.3 mm in diameter and 2 mm in height, were created in 80 human mandibular first molars. The teeth were then divided into 4 groups (n=20). In groups 1 and 3 CH was placed in the perforation for one week, before placement of WMTA and CEM. In groups 2 and 4 perforations were repaired without placement of CH. In groups 1 and 2 the perforation sites were repaired with WMTA and CEM cement was used in groups 3 and 4. After 7 days, the push-out test was carried out using a universal testing machine. Data were analyzed with two-way ANOVA. The level of significance was set at 0.05.ResultsThe maximum and minimum bond strength values were recorded in the WMTA/CH (13.08±1.8 MPa) and CEM cement groups (8.03±0.98 MPa), respectively. There were significant differences in resistance to dislodgement between the WMTA/CH and other groups (PConclusionPlacement of CH before placement of WMTA in furcation perforation improves the push-out bond strength of this material.Keywords: Calcium, Enriched Mixture, Calcium Hydroxide, Furcation Perforation, Mineral Trioxide Aggregate, Push, Out} -
Statement of Problem: Adhesion to root canal dentin is one of the necessary characteristics of endodontic sealers. MTA Fillapex (Angelus, Londria, PR, Brazil) is one of the recently introduced MTA-based sealer. Only a limited number of studies have evaluated the bonding of this sealer to the dentin, with conflicting results.ObjectivesThe purpose of this study was to evaluate the bond strength of MTA Fillapex sealer) to root canal dentin compared to an epoxy resinbased sealer (AH26 sealer).Materials And MethodsTwenty root blocks (6mm length) were acquired from the middle part of the extracted single-rooted central or lateral maxillary incisor roots and their lumens were enlarged to achieve a diameter of 1.3 mm. MTA Fillapex and AH26 were placed in the lumens of root blocks (n = 10). The specimens were kept in an incubator for 7 days, the roots were sectioned perpendicular to their long axis to achieve slices with thickness of 1 mm and the push-out test was carried out by a universal testing machine.ResultsThe mean value of bond strength was 1.84 ± 0.7 Mpa for AH26 and 0.19 ± 0.1 Mpa for MTA Fillapex. The difference between the two groups was statistically significant (p < 0.001).ConclusionsWith in the limitation of this study, AH 26 showed significantly higher bond strength in comparison to MTA Fillapex.Keywords: Endodontic Sealers, MTA, Push, out Bond Strength}
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Journal of Dental Research, Dental Clinics, Dental Prospects, Volume:9 Issue: 4, Autumn 2015, PP 221 -225Background And AimsThe single-cone technique has gained some popularity in some European countries. The aim of the present study was to compare the push-out bond strength of gutta-percha to root canal dentin with the single-cone and cold lateral compaction canal obturation techniques.Materials And MethodsThe root canals of 58 human mandibular premolars were prepared using modified crown-down technique with ProTaper rotary files up to #F3 as a master apical file (MAF) and divided randomly into groups A and B based on canal obturation technique. In group A (n = 29) the root canals were obturated with single-cone technique with #F3 (30/.09) ProTaper gutta-percha, which was matched with MAF in relation to diameter, taper and manufacturer; in group B (n = 29) the canals were obturated with gutta-percha using cold lateral compaction technique. In both groups AH plus sealer were used. After two weeks of incubation, three 2-mm slices were prepared at a distance of 2 mm from the coronal surface and push-out test was carried out. Data were analyzed with descriptive statistics using independent samples t-test.ResultsThere were statistically significant differences between two groups. The mean push-out bond strength was higher in group B (lateral compaction technique) compared to group A (single-cone technique; P < 0.05).ConclusionUse of single-cone technique for obturation of root canals resulted in a lower bond strength compared to cold lateral compaction technique.Keywords: Push, out bond strength, gutta, percha, root dentin}
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Journal of Dental Research, Dental Clinics, Dental Prospects, Volume:9 Issue: 4, Autumn 2015, PP 233 -238Background And AimsVarious factors influence the interfacial bond between the fiber posts and root canal dentin. The aim of the present study was to evaluate the effect of pre-warming of resin cement on the push-out bond strength of fiber posts to various segments of root canal dentin.Materials And MethodsIn this in vitro study, 40 single-rooted human premolars were decoronated and underwent root canal treatment along with post space preparation. The samples were randomly divided into two groups: In group 1, Panavia F 2.0 cement was used at room temperature; in group 2, the same cement was warmed to 55‒60°C before mixing. After fiber posts were placed and cemented in the root canals, 3 dentin/post sections (coronal, middle and apical) with a thickness of 3 mm were prepared. A universal testing machine was used to measure push-out bond strength in MPa. Data was analyzed using two-factor ANOVA and a post hoc Tukey test at α=0.05.ResultsThe mean value of push-out bond strength was high at room temperature, and the differences in the means of push-out bond strength values between the resin cement temperatures and between different root segments in each temperature were significant (P<0.05).ConclusionPre-warming of Panavia F 2.0 resin cement up to 55‒60°C reduced push-out bond strength to root canal dentin. In addition, in each temperature group bond strengths decreased from coronal to apical segments.Keywords: Push, out bond strength, fiber post, resin cement, pre, warming, laboratory research}
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The Effect of Chlorhexidine on the Push-Out Bond Strength of Calcium-Enriched Mixture CementIntroductionThe aim of this in vitro study was to evaluate the effect of 2% chlorhexidine (CHX) on the push-out bond strength (BS) of calcium-enriched mixture (CEM) cement. Methods and Materials: Root-dentin slices from 60 single-rooted human teeth with the lumen diameter of 1.3 mm were used. The samples were randomly divided into 4 groups (n=15), and their lumens were filled with CEM cement mixed with either its specific provided liquid (groups 1 and 3) or 2% CHX (groups 2 and 4). The specimens were incubated at 37°C for 3 days (groups 1 and 2) and 21 days (groups 3 and 4). The push-out BS were measured using a universal testing machine. The slices were examined under a light microscope at 40× magnification to determine the nature of bond failure. The data were analyzed using the two-way ANOVA. For subgroup analysis the student t-test was applied. The level of significance was set at 0.05.ResultsAfter three days, there was no significant difference between groups 1 and 2 (P=0.892). In the 21-day specimens the BS in group 3 (CEM) was significantly greater than group 4 (CEM+CHX) (P=0.009). There was no significant difference in BS between 3 and 21-day samples in groups 2 and 4 (CEM+CHX) (P=0.44). However, the mean BS after 21 days was significantly greater compared to 3-day samples in groups 1 and 3 (P=0.015). The bond failure in all groups was predominantly of cohesive type.ConclusionMixing of CEM with 2% CHX had an adversely affected the bond strength of this cement.Keywords: Bond Strength, Calcium, Enriched Mixture, CEM Cement, Chlorhexidine, Push, out Bond strength, Root, End Filling Materials}
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BackgroundThe purpose of this study was to compare the push-out bond strength of mineral trioxide aggregate (MTA) and calcium enriched mixture (CEM) as root end fi lling materials.Materials And MethodsA total of 40 root dentin slices (1 ± 0.2 mm) were prepared from freshly extracted human maxillary central teeth and their lumens were enlarged to 1.3 mm. The slices were randomly divided into two groups (n = 20). MTA and CEM cement were mixed according to manufacturer’s instruction and introduced into the lumens. The specimens were wrapped in pieces of wet gauze soaked in distilled water and incubated at 37°C for 3 days. The push out bond strength was measured using a universal testing machine. The slices were then examined under a light microscope at ×10 magnifi cation to determine the nature of bond failure. The data were analyzed using Mann-Whitney test (P < 0.001).ResultsThe mean push-out bond strength for CEM cement and MTA were 1.68 ± 0.9 and 5.94 ± 3.99 respectively. The difference was statistically signifi cant (P < 0.001). The bond failure was predominantly of adhesive type in MTA group and cohesive type in CEM group.ConclusionCEM cement showed signifi cantly lower bond strength to the dentinal wall compared to MTA.Keywords: Adhesive, calcium enriched mixture cement, cohesive, mineral trioxide aggregate, push, out bond strength}
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IntroductionThe aim of the present experimental study was to evaluate the push-out bond strength of Dorifill, Epiphany and MTA-Fillapex sealers to root canal dentin in presence and absence of smear layer (SL). Methods and Materials: Sixty human single-rooted teeth were selected and divided into six groups (n=10). The canal irrigation protocol in groups 1, 3 and 5 consisted of 2.5% NaOCl during instrumentation and normal saline at the end of preparation plus a 5-min irrigation with 17% ethylenediaminetetraacetic acid (EDTA). In the remaining groups, normal saline was used for canal irrigation. The root canals were filled with Epiphany/Resilon (groups 1 and 2), Dorifill/gutta-percha (groups 3 and 4) and MTA-Fillapex/gutta-percha (groups 5 and 6). After two weeks of storage in 95% relative humidity at 37ºC, 2 mm-thick dentin disks were prepared from coronal third of each root. The push-out bond strength test was carried out using a universal testing machine. Data were analyzed with the two-way ANOVA and post hoc Tukey’s tests. Statistical significance was defined at 0.05.ResultsThe highest (3.06±0.38 MPa) and lowest (1.16±0.32 MPa) push-out bond strength values were recorded in Epiphany/Resilon-NaOCl/EDTA and Dorifill/gutta-percha/normal saline groups, respectively. There were significant differences in the bond strength of sealers (P<0.05). In addition, elimination of the SL significantly increased the bond strength of all sealers (P<0.05).ConclusionThe Epiphany/Resilon group exhibited the highest push-out bond strength in the presence and absence of the SL. Elimination of the SL resulted in a significant increase in the bond strength of all the sealers to dentin.Keywords: Dorifill, Epiphany Sealer, MTA, Fillapex, Push, Out Bond Strength, Root Canal, Smear Layer}
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IntroductionThis laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. Methods and Materials: Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, CEM cement was mixed according to manufacturers’ instruction and placed in the lumens with minimal pressure. The specimens were randomly divided into four groups (n=12) which were wrapped in pieces of gauze soaked in either synthetic tissue fluid (STF) (pH=7.4) or butyric acid which was buffered at pH values of 4.4, 5.4 and 6.4. They were then incubated for 4 days at 37°C. The push-out test was performed by means of the universal testing machine. Specimens were then examined under a digital light microscope at 20× magnification to determine the nature of the bond failure. The data were analyzed using the Kruskal-Wallis test followed by Dunn’s test for pair-wise comparisons.ResultsThe highest push-out bond strength (10.19±4.39) was seen in the pH level of 6.4, which was significantly different from the other groups (P<0.05). The values decreased to 2.42±2.25 MPa after exposure to pH value of 4.4.ConclusionLower pH value of highly acidic environments (pH=4.4), adversely affects the force needed for displacement of CEM cement; while in higher pH values (pH=6.4) the bond-strength was not affected. CEM cement is recommended in clinical situations where exposure to acidic environment is unavoidable.Keywords: Acidic Environment, Calcium, Enriched Mixture, CEM cement, Push, Out Bond Strength, Root, End filling}
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BackgroundTrioxide Aggregate (MTA) has been widely used in root canal therapy. MTA has been mixed with chlorhexidine to increase its antimicrobial effect..ObjectivesThe aim of this study was to evaluate the effect of chlorhexidine (2%) on push-out bond strength of Mineral Trioxide Aggregate (MTA)..Materials And MethodsSixty dentin disks with a thickness of 1.5 ± 0.2 mm and lumen size of 1.3 mm were prepared. Dentin disks were randomly divided into four groups (n = 15), and their lumens were filled with MTA mixed with distilled water (groups 1 and 3) or with chlorhexidine 2% (groups 2 and 4). Specimens were incubated at 37°C for 3 days (groups 1 and 2) or 21 days (groups 3 and 4). Bond strengths of the MTA-treated dentin surfaces were evaluated using a universal testing machine, and bond failure on the disks was examined by light microscope. Data was analyzed using Kruskal-Wallis H test (P = 0.976)..ResultsThere were no statistically significant differences between all the experimental groups. The mode of bond failure was predominantly mixed for distilled water groups and cohesive for CHX groups..ConclusionsThis study suggested that chlorhexidine had no negative effect on the bond strengths of MTA-treated dentin..Keywords: Mineral Trioxide Aggregate, Chlorhexidine, Push, Out Bond Strength}
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زمینه و هدفمواد متعددی جهت درمان رتروگرید کانال و ترمیم پرفوراسیون ها استفاده شده است. اخیرا Mineral Trioxide Aggregate (MTA) به عنوان ماده ای امیدوارکننده در ترمیم پرفوراسیون ریشه به دلیل سازگاری عالی خود، توانایی سیل بالا و ست شدن در حضور رطوبت و خون و همچنین القای تشکیل عاج، سمان و استخوان به طور گسترده ای مورد استفاده قرار می گیرد. هدف از انجام این مطالعه، بررسی استحکام باندMTA به عاج دندان در ناحیه 1⁄3 میانی ریشه در سه دوره زمانی می باشد.روش بررسیاین مطالعه بر روی 60 دندان تک ریشه انسان به روش آزمایشگاهی انجام گردید. پس از آماده سازی، نمونه ها به صورت تصادفی به سه گروه یک هفته ای، یک ماهه و دو ماهه تقسیم شدند و در مایع بافتی مصنوعی (4/7= pH) قرار گرفتند. استحکام پیوند MTA توسط دستگاه تست یونیورسال در زمان های عنوان شده محاسبه شد. داده ها توسط نسخه 13 نرم افزار SPSS و تست های آماری واریانس یک طرفه آنووا (ANOVA) و توکی (Tukey) آنالیز شدند.یافته هامیانگین استحکام پیوند در نمونه های یک هفته ای معادل 3157/2 مگاپاسگال بود که بیشتر از میانگین نمونه های یک ماهه (125/0) و دو ماهه (12/0) بود. بین میانگین استحکام باند در سه دوره یک هفته ای، یک ماهه و دوماهه تفاوت معناداری وجود داشت (001/0>P).نتیجه گیریبا گذر زمان از یک هفته به دو ماه، استحکام پیوند MTA به عاج به مرور کم می شود.
کلید واژگان: استحکام باند, Mineral Trioxide Aggregate, پرفوراسیون, MTA, عاج}Background And ObjectiveSeveral materials are used for retrograde treatment and perforations repair. Mineral trioxide aggregate has been widely used as a promising biomaterial to repair root perforations because of its excellent biocompatibility, high sealing abilities, ability to set in the presence of blood and induction of dentin, bone and cement. The aim of this study was to evaluate the push-out strength of MTA-dentin in the middle third of the root. Subjects andMethodsThis in vitro study was performed on 60 human single-rooted teeth. After preparation, the specimens were randomly divided into 3 groups (n=20, for each period of assessment) and soaked in synthetic tissue fluid (STF) (pH= 7.4). The push-out bond strengths were then measured by using a universal testing machine after one week and 1and 2 months of use. Data were analyzed by SPSS software (version 13) and ANOVA and Tukey statistical tests.ResultsAverage push-out bond strength at the first week specimens was 2.3157 Megapascal which was more than the average after the first month (0.125) and two months (0.12). There were significant differences between the average push-out bond strength after one week,one month and two month (P<0.001).ConclusionWith passage of time from one week to two months the push-out bond strength of MTA is decreased.Keywords: Push, out bond strength, Mineral trioxide aggregate, Perforation, MTA, Dentin} -
IntroductionThis in vitro study was designed to evaluate the effect of smear layer removal on push-out bond strength of white mineral trioxide aggregate (WMTA) and calcium-enriched mixture cement (CEM).Materials And MethodsDentin discs with 3 mm thicknesses were divided into 4 groups (n=15): group 1: irrigation of the canal with normal saline and filling with WMTA; group 2: irrigation with sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (EDTA), and then filling with WMTA; group 3: same as group 1 but the lumens were filled with CEM; group 4: same as group 2 but the lumens filled with CEM. The samples were incubated at 37°C for 3 days after wrapping in gauze pieces moistened with distilled water. The push-out bond strengths were then measured by the universal testing machine and the failure modes were examined under a stereomicroscope at 40× magnification. Data were analyzed using two-way ANOVA and post-hoc Tukey’s test for bond strength. Statistical significance was set at P<0.05.ResultsThe greatest and lowest mean standard deviation for push-out bond strength were observed for groups 4 (3.13±1.46 MPa) and group3 (1.44±0.96 MPa), respectively. The effect of smear layer removal on push-out bond strength of CEM was significant (P=0.01), however, it was not significant for WMTA (P=0.52). The failure mode for all the groups was of mixed type.ConclusionUnder the limitations of this study, smear layer removal is recommended for CEM in order to gain higher push-out strength.Keywords: Calcium, Enriched Mixture, Mineral Trioxide Aggregate, Push, Out Bond Strength, Root Canal Preparation, Smear Layer}
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IntroductionThe aim of this in vitro study was to evaluate the effect of smear layer on the push-out bond strength of white mineral trioxide aggregate (WMTA) with and without disodium hydrogen phosphate (Na2HPO4).Materials And MethodsDentin discs with standard cavities were obtained from extracted human single-rooted teeth and divided to 4 groups (n=15) according to the irrigation regimen and the canal filling material. In groups 1 and 3, canals were irrigated with normal saline; in groups 2 and 4, irrigation method included sodium hypochlorite (NaOCl) and then ethylenediaminetetra-acetic acid (EDTA). The canals were filled with WMTA in first and second groups and with WMTA+Na2HPO4; in groups 3 and 4. The samples were wrapped in wet gauze and incubated in 37°C for 3 days. The push-out bond strength was then measured by means of the Universal Testing Machine and the failure modes were examined under stereomicroscope at 40× magnification. Tow-way ANOVA was used to evaluate the effect of material type and smear layer removal. Post hoc Tukey test was used for the two-by-two comparison of the groups.ResultsThe greatest and lowest mean±standard deviation for push-out bond strength were observed in groups 4 (4.54±1.14 MPa) and 1 (1.44±0.96 MPa), respectively. The effect of removing the smear layer on the push-out bond strength of WMTA+Na2HPO4 was significant (P=0.01), but not for WMTA (P=0.52). Interestingly, there was significant difference between groups 1, 3 and 2, 4 (P<0.05). The failure mode for all experimental groups was of mixed type.ConclusionUnder circumstances of this in vitro study, removal of smear layer increases push-out bond strength when Na2HPO4 is added to WMTA.Keywords: Disodium Hydrogen Phosphate, Mineral Trioxide Aggregate, Push, Out Bond Strength, Smear Layer, Root Canal Preparation}
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مقدمهزخم فشاری یک تشخیص و نیاز مراقبتی مهم پرستاری در بیماران بستری در بخش های مراقبت ویژه بوده که علاوه بر به تعویق انداختن بهبودی، هزینه های زیادی را به بیمار و خانواده وی تحمیل می کند. مهمترین روش مراقبتی برای این زخم ها پانسمان است. لذا این پژوهش با هدف مقایسه تاثیر پانسمان عسل با پانسمان هیدروکلوئید بر ترمیم زخم فشاری بیماران بستری در بخش های ویژه بیمارستان های شهدا و فارابی کرمانشاه انجام شده است.مواد و روش هادر این پژوهش کارآزمایی بالینی 29 بیمار با 40 زخم فشاری درجه 2 و 3 که ویژگی های مورد نظر پژوهشگر را داشتند بعنوان مشارکت کننده در پژوهش انتخاب و پس از همسان سازی بطور تصادفی بر حسب بیمارستان بستری به دو گروه درمان و کنترل تقسیم شده اند (بیمارستان بطور تصادفی و نمونه ها بصورت هدفمند انتخاب شدند). گروه درمان (پانسمان عسل) تعداد 15 بیمار با 20 زخم فشاری در بیمارستان شهدا و گروه کنترل (پانسمان هیدروکلوئید) تعداد 14بیمار با 20 زخم فشاری در بیمارستان فارابی شهر کرمانشاه تحت مراقبت قرار گرفتند. ابزار ارزیابی زخم، مقیاس زخم فشاری (پوش) Pressure Ulcer Scale (PUSH) بود، که در بدو بستری و سپس بصورت هفتگی تا 5 هفته زخم ها ارزیابی و نمره پوش تعیین شده و بعد از مداخله با مقایسه نمرات پوش در دو گروه قبل و بعد و بین گروه ها میزان بهبودی سنجیده شده است. داده ها با استفاده از نرم افزارSPSS مورد تجزیه و تحلیل قرار گرفتند.یافته هایافته ها نشان داد که در دو گروه پانسمان عسل و پانسمان کامفیل میانگین نمره پوش نمای نزولی داشته و میانگین هر دو گروه قبل و بعد اختلاف معنا داری نشان داده است (سیر بهبودی با 001/0>P). هرچند که در گروه بیماران پانسمان عسل شیب کاهش نمره پوش تندتر و وضعیت ترمیم بهتری در هنگام مراقبت داشتند، اما از لحاظ آماری بین دو گروه بعد از مداخله تفاوت معنی داری مشاهده نشده و میزان بهبودی زخم تفاوت آماری نشان نداد (15/0P=).نتیجه گیریدر این پژوهش تاثیر پانسمان با عسل و پانسمان هیدروکلوئید در ترمیم زخم فشاری نتایج مشابهی نشان داده و هر دو در بهبودی زخم فشاری موثر بوده اند. لیکن راحتی تهیه، مقرون به صرفه بودن و طبیعی بودن پانسمان عسل در ترمیم زخم فشاری موجب گردید (با توجه به امکان تهیه آسان در داخل کشور) تا این پانسمان به عنوان گزینه مناسبتر و بهتر در ترمیم زخم فشاری توصیه گردد.
کلید واژگان: زخم فشاری, بخش مراقبت های ویژه, پانسمان عسل, پانسمان هیدروکلوئید, کامفیل}IntroductionBed sore is an important nursing diagnosis in patients in ICU which delay recovery and increase costs of patients and their family. The best method for bed sores is dressing. The aim of the study was to compare the effect of honey dressing with hydrocolloid dressing on pressure ulcer healing in ICU patients.Materials And MethodsIn this randomized clinical trial research، 29 patients with total of 40 pressure ulcers were participated. After selecting the patient based on inclusion criteria، hospitals were divided randomly in two control and intervention groups. Intervention group with total of 20 pressure ulcers were received bed sore care with honey dressing in Shohada hospital and control group with total of 20 pressure ulcers were received bed sore care with hydrocolloid dressing in Farabi hospital. Ulcers state were measured with Pressure Ulcer Scale (PUSH) at the beginning of hospitalization and then weekly for 5 weeks. After intervention by comparing PUSH score in two groups، recovery were measured. Data were analyzed by SPSS.FindingsThe results showed that the two groups were statistically similar with regard to baseline and wound characteristics. After 5 weeks of treatment، patients who were treated by honey dressing had similar PUSH tool scores with patients that were treated with hydrocolloid dressing. However، recovery in group with honey dressing was faster، but there was not any significant difference.ConclusionResults showed that healing among patients that were treated with honey dressing were statistically similar with the comparison group. But easy accessibility، economical and neutrality makes honey dressing treatment as choice for pressure ulcers treatment.Keywords: Pressure ulcer, Honey dressing, Hydrocolloid dressing, PUSH}
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