scholarly journals Hard Tissue Architecture of Tooth – No Strain with Stain

2018 ◽  
Vol 3 (1) ◽  
pp. 5
Author(s):  
Nicholette Tan ◽  
A. Thentamil ◽  
Mathew Jacob
Keyword(s):  
Tissue Architecture ◽  
Hard Tissue ◽  
Apical Portion ◽  
Hard Tissues ◽  
Natural Teeth ◽  
Group 2 ◽  
Natural Tooth ◽  
Group 1

<p>One of the methods for visualizing and studying the hard tissues of the tooth is by preparation of ground sections of the desired area of the tooth. This method is relatively simple and enables us to appreciate the site and arrangement of various anatomical units of enamel, dentin and cementum. However, these sections are unstained and the features observed are based on the degree of light permeating through the sections. In this experiment, natural tooth were preserved in haematoxylin and eosin to study histological components of tooth. Twenty recently extracted natural teeth were utilized for this experiment and divided into two groups. In group 1, apical portion of the tooth were sealed and perforations were made on the different aspects of the tooth. In group 2, the apical portions of the root were flattened and the apex kept open. Both groups were preserved in haematoxylin and eosin to permit imbibition of the stain. Following which, ground sections were prepared and viewed under a microscope.</p>

scholarly journals Influence of the EDTA, Nd:YAG laser and association of both on the filling of artificial lateral root canals

2004 ◽  
Vol 12 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Fernanda Gomes de Moraes ◽  
Clovis Monteiro Bramante ◽  
Ivaldo Gomes de Moraes ◽  
Everdan Carneiro ◽  
Renato Menezes
Keyword(s):  
Statistical Analysis ◽  
Nd:Yag Laser ◽  
Lateral Root ◽  
Hybrid Technique ◽  
Apical Portion ◽  
Root Canals ◽  
Group 3 ◽  
Sodium Hypochloride ◽  
Group 2 ◽  
Group 1

This study aimed at evaluating the influence of EDTA, Nd:YAG laser and the combination of both for filling of artificial lateral root canals. Forty-five human mandibular premolars were employed, on which three artificial lateral root canals were prepared by means of a reamer with a similar diameter to a K file #15. The teeth were instrumented through the stepback technique employing Gates Glidden burs at the middle and cervical thirds and manual files at the apical portion, and irrigation with 1% sodium hypochloride. The teeth were divided in three groups: Group 1 -EDTA for 5 minutes; Group 2 -application of Nd:YAG laser at 15 Hz, 100 mJ and 1.5 Watts; and Group 3 - association of both. Roots were filled through the Tagger's hybrid technique, radiographed and the radiographs were digitized. Scores were assigned to the filling of the lateral root canals. Statistical analysis revealed no significant differences between the entire groups and also on the analysis of each third.

scholarly journals The histopathological effect of diclofenac potassium on maternal and fetal tissues

2020 ◽  
Vol 11 (3) ◽  
pp. 2866-2878
Author(s):  
Abdel-Rahman Tawfik ◽  
Nouf Bader Alduweesh ◽  
Zeinab Abdel-Hameid Mohamed ◽  
Abdel Rahman Sayed Sultan ◽  
Heba Ali Abd El-Rahman
Keyword(s):  
Fetal Liver ◽  
Harmful Effect ◽  
Control Group ◽  
Tissue Architecture ◽  
Pregnant Rats ◽  
Fetal Tissues ◽  
Group 3 ◽  
Group 2 ◽  
Histopathological Studies ◽  
Group 1

Diclofenac (DCF) is one of the most generally utilized non-steroidal antiinflammatory therapies during the world for different diseases curing in post pubertal ladies. Be that as it may, constrained data is accessible with respect to its security during pregnancy and teratogenicity. The present study was done to investigate the histopathological impact of diclofenac potassium (DP) on some vital maternal and fetal tissues, placenta and liver during two different periods of gestation. In this study 30 pregnant rats have been used and divided into 3 groups (ten for each one); group 1 (control), group 2 treated with 15.4 mg/kg of diclofenac potassium during organogenesis period, and group 3 subjected during fetal developmental period with the same dosage. At the 20 gestation day the rats were anesthetized and dissected, histopathological studies on placenta, maternal liver, and fetal liver have been done. Our results revealed moderate to severe histopathological alternations in all examined tissues like disorganization of tissue architecture, vacuolation, lymphatic infiltration, apoptosis and more changes. There is a harmful effect of the DP on the placenta tissue and also the liver tissue of the fetus, and on this we recommend that you use the DP with caution during pregnancy at the possible lowest effective dose and for the shortest duration.

scholarly journals The Effects of Tamarindus Indica Seed Extract On Mice Kidney, Liver and Skin Following Envenomation with Daboai Russelli And Naja Kaouthia

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Soraya Ismail ◽  
Pakeer Oothuman ◽  
Khin Maung Maung
Keyword(s):  
Species Group ◽  
Seed Extract ◽  
Tamarindus Indica ◽  
Tissue Architecture ◽  
Skin Sample ◽  
Histological Changes ◽  
Naja Kaouthia ◽  
Group 2 ◽  
Kidney Liver ◽  
Group 1

Introduction: Tamarindus indica seed extract (TSE) has anti-snake-venom properties. This study examined the histological changes of kidney, liver and skin of mice envenomed with either Daboai russelli and Naja kaouthia and treated with TSE. Materials and Methods: ICR mice were used. Group 1 mice (n=8) were given subcutaneous (SC) venom only of either species. Group 2 (n=8) envenomed mice were treated with SC TSE 30mg/20g at the same site 30 minutes after envenomation with either species. Tissue samples were harvested at 24 hours and 1 week. Transversely cut kidney, biggest liver lobe, and skin sample from the venom injection site were fixed in 10% formal-saline and stained with Haematoxylin-Eosin for light-microscopy analysis. Results: Group 1 mice exposed to D.russelli venom, all died within 48hours. Hence, no comparison was made between Groups 1 and 2 at 1 week. However histological comparison was made within Group 2 at 24 hours and 1 week. Kidney histological changes of envenomed mice showed mild nephropathy; liver showed inflammation and mild liver injury. Skin samples showed disruption of the skin architecture. These changes, worsened after 1 week. However, changes in the skin were unaltered after 1 week for N.kaouthia. When TSE 30mg/20g was administered, there was restoration of tissue architecture in mice envenomed with either species. Conclusion: When mice were exposed to LD100 of either snake venoms, histological changes took place within 24 hours. This study showed that TSE 30mg/20g was able to restore tissue architecture within 24 hours.

scholarly journals Histologic evaluation of pulpotomy performed with ethyl-cyanoacrylate and calcium hydroxide

2006 ◽  
Vol 20 (3) ◽  
pp. 226-230 ◽  
Author(s):  
Diana Santana de Albuquerque ◽  
Luciana Ferraz Gominho ◽  
Roberto Alves dos Santos
Keyword(s):  
Calcium Hydroxide ◽  
Fisher Exact Test ◽  
Hard Tissue ◽  
Exact Test ◽  
Hydroxide Group ◽  
Barrier Formation ◽  
Histologic Evaluation ◽  
Group 2 ◽  
Ethyl Cyanoacrylate ◽  
Group 1

The aim of this study was to evaluate histological aspects of the pulp-dentin complex of dogs submitted to pulpotomy and capped with ethyl-cyanoacrylate and calcium hydroxide. Thirty dog teeth were divided into 2 groups of 15 as follows: Group 1 - ethyl-cyanoacrylate; Group 2 - calcium hydroxide. The pulpotomies were carried out following all of the treatment precautions recommended for dogs. After 30 days the specimens were submitted to histological preparation and were then blindly evaluated by a histologist. Data were analyzed statistically by the Fisher exact test, comparing the two groups. After 30 days, the presence of a hard tissue barrier was observed in 83.3% of Group 1, and in 100% of Group 2 (p = 0.478). A continuous hard tissue barrier was observed in 50% of the ethyl-cyanoacrylate group and 75% of the calcium hydroxide group (p = 0.652). It can be concluded that both materials induced hard tissue barrier formation, but Group 2 had a higher percentage than Group 1, with no significant statistical differences; the differences observed between the different barriers (continuous/non-continuous) were not significant between groups and there was no pulpal necrosis in either group.

scholarly journals Retrospective Analysis of the Effect of Three-Dimensional Preformed Titanium Mesh on Peri-Implant Non-Contained Horizontal Defects in 100 Consecutive Cases

2021 ◽  
Vol 11 (2) ◽  
pp. 872
Author(s):  
In-Oh Choi ◽  
Ji-Su Oh ◽  
Sang-Joun Yu ◽  
Byung-Ock Kim ◽  
Won-Pyo Lee
Keyword(s):  
Three Dimensional ◽  
Collagen Membrane ◽  
Mesh Exposure ◽  
Titanium Mesh ◽  
Hard Tissue ◽  
Significant Difference ◽  
Group 3 ◽  
The Mean ◽  
Group 2 ◽  
Group 1

This study aimed to clinically and radiographically evaluate the results of guided bone regeneration (GBR) using three-dimensional preformed titanium mesh (3-D-PFTM) for non-contained horizontal defects in 100 consecutive cases. This study involved 100 patients (129 implants) with peri-implant non-contained horizontal defects. The patients were divided into three groups: 3-D-PFTM alone (Group 1), 3-D-PFTM plus cross-linked collagen membrane (Group 2), and 3-D-PFTM plus non-cross-linked collagen membrane (Group 3). Each implant was evaluated radiographically using CBCT at baseline and 6 months postoperatively. At the platform level, the mean horizontal hard tissue gain of all the sites was 3.1 ± 1.3 mm at 6 months postoperatively. The mean rate of mesh exposure was 11.8% in Group 1, 4.2% in Group 2, and 5.0% in Group 3. The mean hard tissue gain rate was 71.0 ± 23.0% in group 1, 84.2 ± 21.5% in group 2, and 84.0 ± 22.9% in group 3. Groups 2 and 3 showed significantly higher hard tissue gain rates than group 1. However, there was no significant difference between the rates in groups 2 and 3. Within the limitations of this study, 3-D-PFTM should be considered as a valuable option for GBR for peri-implant non-contained horizontal defects. The use of an additional resorbable collagen membrane provides additional advantages.

scholarly journals The Effects of Wearing a Removable-Partial-Denture on the Bite Forces: A Cross-Sectional Study

2021 ◽  
Vol 18 (21) ◽  
pp. 11401
Author(s):  
Iole Vozza ◽  
Licia Manzon ◽  
Pier Carmine Passarelli ◽  
Nicola Pranno ◽  
Ottavia Poli ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Bite Force ◽  
The Body ◽  
Dental Arch ◽  
Removable Partial Denture ◽  
Natural Teeth ◽  
Group 2 ◽  
The Relationship ◽  
Group 1

Background: Removable partial dentures are a frequently used prosthetic treatment in the elderly population, but different types or RPDs might guarantee different chewing capabilities. In many studies, the relationship between chewing and aging has been reported and it has been shown that efficient chewing can improve the overall quality of life. Objectives: In the present study, the relationship between maximum bite force (MBF) and RPDs was studied. A relationship between the body mass index (BMI) and the type of prosthesis was also analyzed. Methods: 240 elderly patients, 120 males and 120 females, with bilateral posterior edentulism (class 1 of Kennedy classification) who had been wearing an RPD for at least a year, were recruited. Patients were divided into two groups: Group 1: male (n = 60) and female (n = 60) patients with bilateral edentulous areas located posterior to the remaining natural teeth and natural teeth in the opposite dental arch. Group 2: male (n = 60) and female (n = 60) patients with maxillary and mandibular bilateral edentulous areas located posterior to the remaining natural teeth. Their Body Mass Index (BMI) and Maximum bite force (MBF) were measured and compared according to the material and design of their RPD. Results: In both Groups, patients wearing cobalt-chrome alloy RPDs (Co-Cr-RPD) (Group 1: 20.25 ± 6.7 MBF, p < 0.001; Group 2: 16.0 ± 5.7 MBF, p < 0.001) had an increased MBF when compared to polymethylmethacrylate RPD (PMMA-RPD) (Group 1: 12.9 ± 3.36 MBF; Group 2: 10.4 + 2.8 MBF), and Valplast RPD (V-RPD) (Group 1: 14.3 ± 4.7 MBF; Group 2: 11.3 ± 3.4 MBF) users. There were no significant differences in bite force between patients wearing PMMA-RPD and V- RPD in both Groups. Patients in Group 2 showed a lower MBF than those in Group 1 (Group 1: 16.05 ± 6.13 MBF; Group 2: 12.6 ± 4.84 MBF; p < 0.001). Conclusions: A reduction in chewing force can lead to choosing softer foods for nutrition, which can lead to an increase in BMI. Our results show that only CoCr-RPD wearers were able to chew consistent food, whereas PMMA- RPD and V-RPD, due to the properties of the materials, their instability, and the possibility of causing pain during mastication, determined a limitation in the choice of food for many of the participants.

In-vivo evaluation of the effect of cyanoacrylate on prosthetic vascular graft infection – does cyanoacrylate increase the severity of infection?

VASA ◽  
2020 ◽  
Vol 49 (4) ◽  
pp. 281-284
Author(s):  
Atıf Yolgosteren ◽  
Gencehan Kumtepe ◽  
Melda Payaslioglu ◽  
Cuneyt Ozakin
Keyword(s):  
Vascular Graft ◽  
Graft Infection ◽  
Vascular Graft Infection ◽  
Group 4 ◽  
Significant Difference ◽  
Group 3 ◽  
Group 2 ◽  
Prosthetic Vascular Graft Infection ◽  
Group 1

Summary. Background: Prosthetic vascular graft infection (PVGI) is a complication with high mortality. Cyanoacrylate (CA) is an adhesive which has been used in a number of surgical procedures. In this in-vivo study, we aimed to evaluate the relationship between PVGI and CA. Materials and methods: Thirty-two rats were equally divided into four groups. Pouch was formed on back of rats until deep fascia. In group 1, vascular graft with polyethyleneterephthalate (PET) was placed into pouch. In group 2, MRSA strain with a density of 1 ml 0.5 MacFarland was injected into pouch. In group 3, 1 cm 2 vascular graft with PET piece was placed into pouch and MRSA strain with a density of 1 ml 0.5 MacFarland was injected. In group 4, 1 cm 2 vascular graft with PET piece impregnated with N-butyl cyanoacrylate-based adhesive was placed and MRSA strain with a density of 1 ml 0.5 MacFarland was injected. All rats were scarified in 96th hour, culture samples were taken where intervention was performed and were evaluated microbiologically. Bacteria reproducing in each group were numerically evaluated based on colony-forming unit (CFU/ml) and compared by taking their average. Results: MRSA reproduction of 0 CFU/ml in group 1, of 1410 CFU/ml in group 2, of 180 200 CFU/ml in group 3 and of 625 300 CFU/ml in group 4 was present. A statistically significant difference was present between group 1 and group 4 (p < 0.01), between group 2 and group 4 (p < 0.01), between group 3 and group 4 (p < 0.05). In terms of reproduction, no statistically significant difference was found in group 1, group 2, group 3 in themselves. Conclusions: We observed that the rate of infection increased in the cyanoacyrylate group where cyanoacrylate was used. We think that surgeon should be more careful in using CA in vascular surgery.

The influence of continuous local wound infusion on postoperative pain in patients undergoing transfemoral amputation

VASA ◽  
2015 ◽  
Vol 44 (5) ◽  
pp. 381-386 ◽  
Author(s):  
Christian Uhl ◽  
Thomas Betz ◽  
Andrea Rupp ◽  
Markus Steinbauer ◽  
Ingolf Töpel
Keyword(s):  
Pain Management ◽  
Pilot Study ◽  
Local Anaesthetic ◽  
Phantom Pain ◽  
Transfemoral Amputation ◽  
Postoperative Wound ◽  
Stump Pain ◽  
Management Protocol ◽  
Group 2 ◽  
Group 1

Abstract. Summary: Background: This pilot study was set up to examine the effects of a continuous postoperative wound infusion system with a local anaesthetic on perioperative pain and the consumption of analgesics. Patients and methods: We included 42 patients in this prospective observational pilot study. Patients were divided into two groups. One group was treated in accordance with the WHO standard pain management protocol and in addition to that received a continuous local wound infusion treatment (Group 1). Group 2 was treated with analgesics in accordance with the WHO standard pain management protocol, exclusively. Results: The study demonstrated a significantly reduced postoperative VAS score for stump pain in Group 1 for the first 5 days. Furthermore, the intake of opiates was significantly reduced in Group 1 (day 1, Group 1: 42.1 vs. Group 2: 73.5, p = 0.010; day 2, Group 1: 27.7 vs. Group 2: 52.5, p = 0.012; day 3, Group 1: 23.9 vs. Group 2: 53.5, p = 0.002; day 4, Group 1: 15.7 vs. Group 2: 48.3, p = 0.003; day 5, Group 1 13.3 vs. Group 2: 49.9, p = 0.001). There were no significant differences between the two groups, neither in phantom pain intensity at discharge nor postoperative complications and death. Conclusions: Continuous postoperative wound infusion with a local anaesthetic in combination with a standard pain management protocol can reduce both stump pain and opiate intake in patients who have undergone transfemoral amputation. Phantom pain was not significantly affected.

Abnormal Haemostasis and Blood Viscosity in Malignant Hypertension

1984 ◽  
Vol 52 (03) ◽  
pp. 253-255 ◽  
Author(s):  
C Isles ◽  
G D O Lowe ◽  
B M Rankin ◽  
C D Forbes ◽  
N Lucie ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Viscosity ◽  
Renal Damage ◽  
Antithrombin Iii ◽  
Plasma Viscosity ◽  
Malignant Hypertension ◽  
Fibrin Deposition ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

SummaryWe have previously shown abnormalities of haemostasis suggestive of intravascular coagulation in patients with malignant hypertension, a condition associated with retinopathy and renal fibrin deposition. To determine whether such abnormalities are specific to malignant hypertension, we have measured several haemostatic and haemorheological variables in 18 patients with malignant hypertension (Group 1), 18 matched healthy controls (Group 2), and 18 patients with non-malignant hypertension (Group 3) matched for renal pathology, blood pressure and serum creatinine with Group 1. Both Groups 1 and 3 had increased mean levels of fibrinogen, factor VIIIc, beta-thrombo- globulin, plasma viscosity and blood viscosity (corrected for haematocrit); and decreased mean levels of haematocrit, antithrombin III and platelet count. Mean levels of fast antiplasmin and alpha2-macroglobulin were elevated in Group 1 but not in Group 3. We conclude that most blood abnormalities are not specific to malignant hypertension; are also present in patients with non-malignant hypertension who have similar levels of blood pressure and renal damage; and might result from renal damage as well as promoting further renal damage by enhancing fibrin deposition. However increased levels of fibrinolytic inhibitors in malignant hypertension merit further investigation in relation to removal of renal fibrin.

Total Knee Arthroplasty after Previous Ipsilateral Hip Arthroplasty Showed Lower Clinical Outcomes and Higher Leg Length Discrepancy Perception

2020 ◽  
Author(s):  
Han-Jun Lee ◽  
Seong Hwan Kim ◽  
Nicolas Pujol ◽  
Yong-Beom Park
Keyword(s):  
Clinical Outcomes ◽  
Hip Arthroplasty ◽  
Leg Length ◽  
Function Score ◽  
Patient’S Satisfaction ◽  
Length Discrepancy ◽  
Total Knee ◽  
Group 2 ◽  
Ks Function ◽  
Group 1

AbstractThe purpose of this study is to compare perception of leg length discrepancy (LLD) and clinical results of total knee arthroplasties (TKA) in patients with or without previous ipsilateral hip arthroplasty. Between 2008 and 2015, navigation-assisted TKA was performed in 43 patients with previous hip arthroplasty after hip fracture. After 1:3 propensity score matching was performed, 108 patients of primary navigation-assisted TKA (group 1) and 36 patients with hip arthroplasty (group 2) were included. Knee Society (KS) scores, Western Ontario and McMaster Universities Index (WOMAC) scores, and patients' satisfaction including perception of LLD were evaluated. Radiographic evaluation included mechanical axis, component position, and LLD. Logistic regression analysis was performed to find the factors that affect the clinical outcomes. No significant differences in radiologic and clinical evaluations, except for KS function score, patient's satisfaction and LLD (p< 0.001), were detected between the groups. LLD and its perception were significantly higher in group 2 (1.8 ± 3.4 mm in group 1 and 9.7 ± 4.1 mm in group 2, p = 0.000). Risk factors for the low KS function score were found as LLD (odds ratio [OR]: 1.403, p = 0.008) and previous hip arthroplasty itself (OR: 15.755, p = 0.002), but much higher OR was found in previous hip arthroplasty. Although the outcomes of TKA in patients with ipsilateral hip arthroplasty are comparable to those of primary TKA, LLD was high and patient's satisfaction and functional outcomes were low in patients with previous ipsilateral hip arthroplasty. Care should be taken when considering TKA in patients with previous hip arthroplasty. This is a Level III, case control study.

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