Tag: nevin manimala

J Clin Pediatr Dent. 2021 Jul 1;45(3):171-176. doi: 10.17796/1053-4625-45.3.5.

ABSTRACT

The purpose of this study was to determine and compare the shear force (N) required to fracture or dislodge an all-ceramic zirconia-based crown using different luting cement with those of polycarbonate crown and strip crown for the primary anterior teeth in vitro.

STUDY DESIGN: Four groups of esthetic restoration for primary anterior teeth were tested for fracture strength: 1) Fifteen all-ceramic zirconia-based crowns cemented with glass ionomer cement, 2) Fifteen all-ceramic zirconia-based crowns bonded with a self-adhesive resin cement, 3) Fifteen polycarbonate crowns cemented with a polymer reinforced zinc-oxide eugenol and 4) Fifteen resin strip crowns. All restorations were placed and cemented on reproductions of dies in an independent laboratory at Delhi, India. All samples underwent loading until fracture or dislodgement with the Universal Testing Machine. The force in Newton (N) required to produce failure was recorded for each sample and the type of failures was also noted and characterized. One-way analysis of variance (ANOVA) test and the Tukey and Scheffe’s post hoc comparisons were used for statistical analyses.

RESULTS: In this invitro study, results were measured in Newtons (N). Group 1 (410.9±79.5 N) and Group 2 (420.5±57.8 N) had higher fracture strength than Group 3 (330.3±85.6 N) and Group 4 (268.4±28.2 N). These differences were statistically significant at P≤.05 among the sample groups. No significant difference was found between groups 1 and 2 (P = 0.984) nor between groups 3 and 4 (P =0.104). Among type of failures, majority of restoration fractures for zirconia-based crowns and resin strip crowns were due to cohesive failures and polycarbonate crowns had predominantly mixed failures.

CONCLUSIONS: Under the limitations of this in vitro study, it could be concluded that all-ceramic zirconia-based crowns attained the highest fracture strength among all restorative samples tested regardless of the type of luting agent employed (P<.01). Cohesive failures were commonly observed in the zirconia crowns and resin strip crowns, whereas polycarbonate crowns revealed predominately mixed failures.

PMID:34192760 | DOI:10.17796/1053-4625-45.3.5

Acad Med. 2021 Jun 29. doi: 10.1097/ACM.0000000000004223. Online ahead of print.

ABSTRACT

PURPOSE: Medical student mistreatment is pervasive, yet whether all physicians have a shared understanding of the problem is unclear. The authors presented professionally designed trigger videos to physicians from six different specialties to determine if they perceive mistreatment and its severity similarly.

METHOD: From October 2016 to August 2018, resident and attending physicians from 10 U.S. medical schools viewed five trigger videos showing behaviors that could be perceived as mistreatment. They completed a survey exploring their perceptions. The authors compared perceptions of mistreatment across specialties and, for each scenario, evaluated the relationship between specialty and perception of mistreatment.

RESULTS: Six-hundred and fifty resident and attending physicians participated. There were statistically significant differences in perception of mistreatment across specialties for three of the five scenarios: aggressive questioning (range 74.1%-91.2%), negative feedback (range 25.4%-63.7%), and assignment of inappropriate tasks (range 5.5%-25.5%) (P ≤ .001, for all). After adjusting for gender, race, professional role, and prior mistreatment, physicians in surgery viewed three scenarios (aggressive questioning, negative feedback, inappropriate tasks) as less likely to represent mistreatment compared to internal medicine physicians. Physicians from obstetrics and gynecology and from “other” specialties perceived less mistreatment in two scenarios (aggressive questioning, negative feedback) while family physicians perceived more mistreatment in one scenario (negative feedback) compared to internal medicine physicians. The mean severity of perceived mistreatment on a 1 to 7 scale (7 most serious) also varied statistically significantly across the specialties for three scenarios: aggressive questioning (range 4.4-5.4, P < .001), ethnic insensitivity (range 5.1-6.1, P = .001), and sexual harassment (range 5.5-6.3, P = .004).

CONCLUSIONS: Specialty was associated with differences in the perception of mistreatment and in the rating of its severity. Further investigation is needed to understand why these perceptions of mistreatment vary among specialties and how to address these differences.

PMID:34192722 | DOI:10.1097/ACM.0000000000004223

J Clin Pediatr Dent. 2021 Jul 1;45(3):152-157. doi: 10.17796/1053-4625-45.3.2.

ABSTRACT

OBJECTIVES: To compare the effectiveness of visual examination, radiographic examination and fluorescence-aided caries excavation (FACE) in detecting occlusal caries in first permanent molars in 150 children aged 6-14 years with intact occlusal surface with caries lesions without cavitation, or with darkened or deep fissures that had no clear diagnosis.

STUDY DESIGN: Two dentists independently performed a visual oral examination, FACE and bitewing radiography. The inter-rater reliability of each detection method was determined and their specificity and sensitivity.

RESULTS: All caries detection methods showed high inter-rater reliability with absolute agreement between raters above 90%. Most caries lesions were detected by visual (75.8%) and FACE (79.1%), while only 28.8% of lesions were detected by radiography. Detection by visual examination was strongly correlated with detection by FACE (X2=37.9, Phi=0.498, p<0.001). A lower, yet statistically significant, correlation was found between visual examination and X-ray radiography (X2=5.53, Phi=0.190, p<0.001). FACE had higher sensitivity (87%) and specificity (65%) for detecting occlusal caries in comparison with radiography (60% specificity and 55% sensitivity).

CONCLUSION: Although visual examination remains the best method to detect occlusal caries in young permanent molars in children, FACE is an effective and accurate diagnostic tool that may aid in detection and treatment decisions.

PMID:34192750 | DOI:10.17796/1053-4625-45.3.2

J Clin Pediatr Dent. 2021 Jul 1;45(3):186-192. doi: 10.17796/1053-4625-45.3.7.

ABSTRACT

OBJECTIVE: To compare the shear bond strength (SBS) after thermocycling of four universal adhesives applied in self-etch mode on dentin and etch-and-rinse mode on enamel.

STUDY DESIGN: Flat 144 buccal or lingual dentin and enamel surfaces from 72 non-carious primary molars were prepared. Samples were segregated into 12 groups (n=12): Adper Single Bond 2 etch-and-rinse (SB_T) and Clearfil SE Bond self-etch (SE_S) applied to enamel and dentin served as controls. Scotch Bond Universal Adhesive (SBU), Clearfil S3 Bond Universal Adhesive (SEU), Tetric N-Bond Universal Adhesive (TEN), and All Bond Universal (BIS) were applied in etch-and-rinse mode to enamel and in self-etch mode to dentin. They were thermocycled for 5000 cycles. SBS testing and the evaluation of fracture mode were performed.

RESULTS: SB_T showed statistically higher SBS than other adhesive groups using etch-and-rinse mode on enamel. SE_S and BIS had statistically higher SBS than other adhesive groups using self-etch mode on dentin. Mixed failure was the most common failure mode in each group.

CONCLUSION: The universal adhesives did not show higher SBS than SB_T when using etch-and-rinse on enamel. All universal adhesives showed higher SBS than SB_T and had SBS similar to SE_S, except SBU when using self-etch mode on dentin.

PMID:34192754 | DOI:10.17796/1053-4625-45.3.7

J Am Acad Orthop Surg. 2021 Jun 30. doi: 10.5435/JAAOS-D-21-00132. Online ahead of print.

ABSTRACT

INTRODUCTION: Total hip arthroplasty (THA) rather than hemiarthroplasty for displaced femoral neck fracture (FNF) is often chosen for younger patients who are more active and/or have underlying hip osteoarthritis. However, instability remains the primary concern of doing THA. Dual mobility (DM) has been shown to decrease this risk through a larger effective head size and greater head-to-neck ratio compared with conventional THA. The purpose of this study was to identify femoral head size and DM usage patterns for the treatment of FNF with THA in the United States using the American Joint Replacement Registry.

METHODS: A retrospective cohort study was conducted, including all primary THAs done for FNF from 2012 to 2019. THA and FNF were defined using Current Procedural Terminology or International Classification of Diseases-9 or -10 diagnosis and procedure codes. Analysis was based on patient demographics, femoral head size, and DM usage. Descriptive statistics were used using a Pearson chi-square test. All analyses were conducted using SAS version 9.4, and statistical significance was set at P < 0.05.

RESULTS: There were 18,752 THAs done by 3,242 surgeons at 789 institutions during the 8-year study period. The overall population was 66% female, and the mean age was 72.3 ± 11.8 years. The most commonly used femoral head size was 36 mm (48.5%) followed by 32 mm (24.5%), ≤28 mm (10.7%), DM (10.8%), and ≥40 mm (5.7%). A trend was observed toward decreased use of ≤28, 32, and ≥40-mm heads starting in 2016 across the years and increased use of 36-mm heads (P < 0.0001). A significant increase was observed in the usage of DM over time from 6.4% in 2012 to 16.2% in 2019 (P < 0.0001).

DISCUSSION: Most of the femoral heads used were ≥36 mm, and the use of DM increased during the study period. Additional analysis is warranted to understand how these trends will affect overall outcomes and postoperative dislocation rates.

PMID:34192715 | DOI:10.5435/JAAOS-D-21-00132

Acad Med. 2021 Jun 29. doi: 10.1097/ACM.0000000000004222. Online ahead of print.

ABSTRACT

PURPOSE: In undergraduate medical education (UME), competency-based medical education has been operationalized through the thirteen Core Entrustable Professional Activities for Entering Residency (Core EPAs). Direct observation in the workplace using rigorous, valid, reliable measures is required to inform summative decisions about graduates’ readiness for residency. The purpose of this study is to investigate the validity evidence of two proposed workplace-based entrustment scales.

METHOD: The authors of this multisite, randomized, experimental study used structured vignettes and experienced raters to examine validity evidence of the Ottawa scale and the UME supervisory tool (Chen scale) in 2019. The authors used a series of 8 cases (6 developed de novo) depicting learners at pre-entrustable (less-developed) and entrustable (more-developed) skill levels across 5 Core EPAs. Participants from Core EPA pilot institutions rated learner performance using either the Ottawa or Chen scale. The authors used descriptive statistics and analysis of variance to examine data trends and compare ratings, conducted inter-rater reliability and generalizability studies to evaluate consistency among participants, and performed a content analysis of narrative comments.

RESULTS: Fifty clinician-educators from 10 institutions participated, yielding 579 discrete EPA assessments. Both the Ottawa and Chen scales differentiated between less- and more-developed skill levels (P < .001). The interclass correlation was good to excellent for all EPAs using Ottawa (range = .68-.91) and fair to excellent using Chen (range = .54-.83). Generalizability analysis revealed substantial variance in ratings attributable to the learner-EPA interaction (59.6% for Ottawa; 48.9% for Chen) suggesting variability for ratings was appropriately associated with performance on individual EPAs.

CONCLUSIONS: In a structured setting, both the Ottawa and Chen scale distinguished between pre-entrustable and entrustable learners; however, the Ottawa scale demonstrated more desirable characteristics. These findings represent a critical step forward in developing valid, reliable instruments to measure learner progression toward entrustment for the Core EPAs.

PMID:34192721 | DOI:10.1097/ACM.0000000000004222

Cardiology. 2021 Jun 30:1-8. doi: 10.1159/000512430. Online ahead of print.

ABSTRACT

INTRODUCTION: The value of color Doppler ultrasonography (CDUS) with the supraclavicular approach for preoperative evaluation of the native left internal mammary artery (LIMA) as well as for the postoperative detection of LIMA graft patency was recently suggested. However, the parameters such as the flow volume and pulsatile index (PI) have not been studied in detail.

OBJECTIVES: The objectives of this study were to analyze the LIMA data in the perioperative period and explore the relationships between the intraoperative graft flow with transit-time flow measurement (TTFM) and the postoperatively measured parameters with CDUS.

METHODS: Fifty-eight patients with significant stenosis (≥70%) or occlusions in left anterior descending artery (LAD) who were referred for isolated coronary artery bypass grafting (CABG) were enrolled in this study and examined by CDUS prior to CABG from April to July 2016. The perioperative measurements of proximal LIMA by CDUS were compared. In addition, the correlation between the intraoperative graft flow, such as the mean graft flow (MGF) and PI, and the immediate postoperative measurements of CDUS in LIMA bypassed grafts was statistically analyzed.

RESULTS: Six patients were excluded due to screening failure, or insufficient visualization of CDUS images for analysis. Fifty-two patients with in situ LIMA-LAD graft, with or without additional arterial grafts or saphenous vein grafts, were included in the final analysis. The postoperative diameters of proximal LIMA were not significantly different from preoperative diameters (2.21 ± 0.18 vs. 2.27 ± 0.22 mm, p = 0.070). The flow volume on the early postoperative CDUS significantly increased (39.77 ± 21.59 vs. 25.96 ± 13.17 mL/min, p < 0.001) and the PI significantly decreased (1.43 ± 0.46 vs. 4.20 ± 1.49, p < 0.001) versus those of preoperative measurements. The MGF had a moderate correlation with the flow volume on the early postoperative CDUS (r = 0.414, p = 0.002), and the PI by TTFM had a weak correlation with that by CDUS (r = 0.353, p = 0.010) as well.

CONCLUSIONS: The MGF and PI by TTFM in CABG were associated with in situ LIMA graft parameters measured by CDUS studies. CDUS is a useful functional noninvasive tool for the preoperative screening and postoperative follow-up of patients with in situ LIMA bypass.

PMID:34192706 | DOI:10.1159/000512430

Urol Int. 2021 Jun 30:1-5. doi: 10.1159/000516682. Online ahead of print.

ABSTRACT

BACKGROUND: Many surgical techniques, as well as dressing models, were identified in the treatment of hypospadias. There are many publications in the literature that are the result of the effort to find the ideal dressing after hypospadias surgery. The dressing has some benefits; however, it has some adverse effects. The present study aimed to discuss outcomes of the patients who have been operated through the tubularized incised plate urethroplasty (TIPU) method and followed with and without dressing postoperatively.

METHODS: Patients operated on through the TIPU method between March 2015 and August 2019 were reviewed retrospectively. The patients were divided into two groups, dressing and undressing. Preoperative hypospadias severity was evaluated according to the Glans-Urethral Meatus-Shaft (GMS) scoring method. The care results of the patients were recorded. Postoperative outcomes were compared according to the Hypospadias Objective Scoring Evaluation (HOSE) scale, and statistical analyses were conducted. The results of both groups were compared statistically.

RESULTS: One hundred and nineteen patients were divided into two groups: dressing (n = 56) and nondressing (n = 63). The patients’ average age was 3.54 ± 2.97 years in group 1 and 3.50 ± 3.01 years in group 2 (p = 0.940). There was not any statistically significant difference between the two groups for demographic data. Minimal bleeding had stopped in three patients in the nondressing group spontaneously before discharging. No severe edema or hematoma, which might have concerned the parents, appeared. Two (3.5%) and 3 (4.7%) patients underwent a maximum of three urethral dilation sessions in dressing and nondressing groups, respectively (p = 0.556). We found no significant difference between groups in the comparison of preoperative GMS and postoperative HOSE scoring.

DISCUSSION: The most important limitation of the study is that it is retrospective. Pre- and postoperative scoring systems are objective. The data obtained in the literature show that surgeons prefer to apply dressings commonly after the TIPU technique. Advantages and disadvantages of dressing are mentioned in the literature. Even if the paradigm is dressing in hypospadias surgery, according to the results of our study, dressing may not affect the functional and cosmetic results of TIPU repair.

CONCLUSION: Postoperative functional and cosmetic results of TIPU in hypospadias appear to be independent of dressing. However, the results must be supported by further research.

PMID:34192707 | DOI:10.1159/000516682

Acta Cytol. 2021 Jun 30:1-6. doi: 10.1159/000517005. Online ahead of print.

ABSTRACT

INTRODUCTION: Core-needle biopsy (CNB) is a minimally invasive procedure used in preoperative diagnosis of breast lumps. It has been seen that in few years, the CNB seems to be replacing the fine-needle aspiration cytology (FNAC), although no study had yet conclusively proved a superiority of one over the other.

AIMS AND OBJECTIVES: The aim of this study was to study the cytohistological spectrum of palpable breast lesions and to evaluate the diagnostic accuracy of FNAC versus CNB for breast lesions.

MATERIALS AND METHODS: The study was a cross-sectional study conducted in the Department of Pathology and Surgery, over a period of 1 year in 152 patients. All the patients were subjected to FNAC and CNB. Cytosmears were stained with May-Grunwald Giemsa and hematoxylin and eosin was done on CNB and excision biopsy (EB) specimens. Sensitivity and specificity were calculated in percentage with 95% confidence interval with reference to CNB/surgical specimens. Kappa statistics were used to compare the level of agreement between FNAC versus CNB and CNB versus surgical specimens.

RESULTS: A total of 152 patients were taken for FNAC and CNB. EB was performed in only 104 patients. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of FNAC verses CNB in correlation with subsequent histopathology were found to be (93.40 vs. 94.06%), (97.50 vs. 100.00%), (99.00 vs. 100.00%), (84.78 vs. 33.33%), and (94.52 vs. 94.23%), respectively.

CONCLUSION: CNB has overcome the pitfall of FNAC but CNB cannot replace FNAC but both procedures are complementary to each other.

PMID:34192704 | DOI:10.1159/000517005

Complement Med Res. 2021 Jun 30:1-7. doi: 10.1159/000510901. Online ahead of print.

ABSTRACT

BACKGROUND: Incomplete abortion is a common complication of pregnancy. Sesamum indicum L. is a widely used emmenagogue herb.

OBJECTIVES: We designed a clinical trial to evaluate the efficacy of sesame for the removal of retained products of conception (RPOC).

METHODS: In this randomized, open-label, and controlled trial, 45 patients received sesame powder as an intervention group and 45 patients received expectant management as a control group for 5 days. The primary outcome measure was complete resolution of RPOC assessed by sonography. Secondary outcome measures were severity of patients’ vaginal bleeding and pain.

RESULTS: 84.1% had complete resolution of RPOC in the sesame group, while 26.2% had complete resolution of RPOC in the control group, which was statistically significant (p < 0.001). Moreover, patients in the sesame group showed a significantly more decreasing trend in pain and vaginal bleeding compared to the control group (p < 0.001).

CONCLUSION: Sesame had a significant effect on the removal of RPOC and the reduction of pain and vaginal bleeding.

PMID:34192691 | DOI:10.1159/000510901