scholarly journals The Bone Buttress Theory: The Effect of the Mechanical Loading of Bone on the Osseointegration of Dental Implants

Biology ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
David Chavarri-Prado ◽  
Aritza Brizuela-Velasco ◽  
Ángel Álvarez-Arenal ◽  
Markel Dieguez-Pereira ◽  
Esteban Pérez-Pevida ◽  
...  
Keyword(s):  
Dental Implants ◽  
Mechanical Loading ◽  
Bone Growth ◽  
Bone Matrix ◽  
Test Group ◽  
Control Group ◽  
Group A ◽  
Bone To Implant Contact ◽  
The Stability ◽  
Group B

Objectives: To determine the effect of mechanical loading of bone on the stability and histomorphometric variables of the osseointegration of dental implants using an experimental test in an animal model. Materials and Methods: A total of 4 human implants were placed in both tibiae of 10 New Zealand rabbits (n = 40). A 6-week osseointegration was considered, and the rabbits were randomly assigned to two groups: Group A (Test group) included 5 rabbits that ran on a treadmill for 20 min daily during the osseointegration period; Group B (Controls) included the other 5 that were housed conventionally. The monitored variables were related to the primary and secondary stability of the dental implants (implant stability quotient—ISQ), vertical bone growth, bone to implant contact (BIC), area of regenerated bone and the percentage of immature matrix. Results: The results of the study show a greater vertical bone growth (Group A 1.26 ± 0.48 mm, Group B 0.32 ± 0.47 mm, p < 0.001), higher ISQ values (Group A 11.25 ± 6.10 ISQ, 15.73%; Group B 5.80 ± 5.97 ISQ, 7.99%, p = 0.006) and a higher BIC (Group A 19.37%, Group B 23.60%, p = 0.0058) for implants in the test group, with statistically significant differences. A higher percentage of immature bone matrix was observed for implants in the control group (20.68 ± 9.53) than those in the test group (15.38 ± 8.84) (p = 0.108). A larger area of regenerated bone was also observed for the test implants (Group A 280.50 ± 125.40 mm2, Group B 228.00 ± 141.40 mm2), but it was not statistically significant (p = 0.121). Conclusions: The mechanical loading of bone improves the stability and the histomorphometric variables of the osseointegration of dental implants.

Resorbable Collagen Barrier Impeding the Extrusion of Obturating Material in Primary Molars Undergoing Resorption – A Randomized Clinical Trial

2021 ◽  
Vol 45 (5) ◽  
pp. 312-316
Author(s):  
Mishra Neha Sanjeev ◽  
Harsimran Kaur ◽  
Sandeep Singh Mayall ◽  
Rishika ◽  
Ramakrishna Yeluri
Keyword(s):  
Test Group ◽  
Primary Molars ◽  
Control Group ◽  
Chi Square ◽  
Significance Level ◽  
Significant Difference ◽  
Chi Square Test ◽  
Group A ◽  
Group B ◽  
And Control

Objective: To evaluate the effectiveness of placing a resorbable collagen barrier in impeding the extrusion of obturation material in primary molars undergoing resorption. Study design: All the 94 canals in 47 mandibular molars were allocated to 2 groups- Group ‘A’- 47 canals with collagen barrier (Test group) and Group ‘B’- 47 canals without collagen barrier (Control group) based on randomization protocol. Pulpectomy was performed and obturation of both test and control canals were radiographically assessed. Pearson’s chi – square test was applied to analyze the results. The significance level was predetermined at p &lt; 0.05. Results: Among the test group, 93.6% of the canals showed no extrusion while, 6.4% showed visible extrusion of the material outside the apex. In the control group, 83% showed no extrusion whereas 17% of the canals showed visible extrusion outside the apex. But no significant difference was noted (p&gt;0.05). Conclusion: The placement of resorbable collagen barrier in the apical third of the canal prevented the extrusion of obturating material beyond the apex in resorbing primary molars.

scholarly journals Enhancement of Bone Ingrowth into a Porous Titanium Structure to Improve Osseointegration of Dental Implants: A Pilot Study in the Canine Model

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3061 ◽  
Author(s):  
Ji-Youn Hong ◽  
Seok-Yeong Ko ◽  
Wonsik Lee ◽  
Yun-Young Chang ◽  
Su-Hwan Kim ◽  
...  
Keyword(s):  
Porous Structure ◽  
Dental Implants ◽  
Bone Growth ◽  
Bone Ingrowth ◽  
Test Group ◽  
Porous Titanium ◽  
Control Group ◽  
Machined Surface ◽  
Significant Difference ◽  
Titanium Structure

A porous titanium structure was suggested to improve implant stability in the early healing period or in poor bone quality. This study investigated the effect of a porous structure on the osseointegration of dental implants. A total of 28 implants (14 implants in each group) were placed in the posterior mandibles of four beagle dogs at 3 months after extraction. The control group included machined surface implants with an external implant–abutment connection, whereas test group implants had a porous titanium structure added to the apical portion. Resonance frequency analysis (RFA); removal torque values (RTV); and surface topographic and histometric parameters including bone-to-implant contact length and ratio, inter-thread bone area and ratio in total, and the coronal and apical parts of the implants were measured after 4 weeks of healing. RTV showed a significant difference between the groups after 4 weeks of healing (p = 0.032), whereas no difference was observed in RFA. In the test group, surface topography showed bone tissue integrated into the porous structures. In the apical part of the test group, all the histometric parameters exhibited significant increases compared to the control group. Within the limitations of this study, enhanced bone growth into the porous structure was achieved, which consequently improved osseointegration of the implant.

scholarly journals Effect of Teriparatide in Fracture Healing in Lower Limbs- An Interventional Study

2021 ◽  
Author(s):  
Sanjeev Kumar ◽  
Girish Sahni ◽  
Harjit K Singh Chawla ◽  
Daljinder Singh
Keyword(s):  
Functional Outcome ◽  
Adverse Reactions ◽  
Weight Bearing ◽  
Test Group ◽  
Control Group ◽  
Dash Score ◽  
Early Weight Bearing ◽  
Group A ◽  
Group B ◽  
Radiological Union

Introduction: Many of the trauma patients presenting to the orthopaedic departments suffer from lower limb fractures. This often leads to prolonged period of morbidity and absence from work. Fracture healing can be delayed in elderly patients, postmenopausal women and in communited fractures. Teriparatide (TPH) given subcutaneously for 6 to 9 months, in such cases, may promote clinical and radiological union of bone. Aim: To know the effect of TPH in improving clinical and radiological union and also to evaluate early weight bearing, improvement in pain and functional outcome. Materials and Methods: In this prospective interventional study, a total of 125 patients were initially enrolled for the study and then after meeting inclusion criteria total 104 patients were selected for the study. They were allocated into two groups by randomisation by 1:1 method-group A was test group of 52 cases in which subcutaneous injection TPH 20 mcg daily (for six months) was given along with standard dosage of calcium and vitamin D; while in 52 cases in group B (control group) only calcium and vitamin D were given. Injection TPH was started within 10 days of fracture and given for six months. No placebo injection was given in control group. Time to weight bearing, time to clinical and radiological union and pain by Visual Analogue Score (VAS) were noted at regular follow-up at one month, three months, six months and 12 months and were compared in both the groups. Functional outcome by Disabilities of the Arm, Shoulder and Hand (DASH) score was noted as an additional tool, as DASH score questionnaire shows many activities of daily living that require mobility and stability of lower limb too. Adverse reactions were noted and compared within test and control groups. The collected data were analysed using International Business Machines (IBM) Statistical Package for the Social Sciences (SPSS) version 22.0 software and Mann-Whitney U test was used to calculate p-value. Results: Average time period for full weight bearing with or without support for test group A was 11±2.7 weeks and 16±1.8 weeks in control group B (p-0.001). Average time to clinical union in test group was 12±1.9 weeks and in control group 16±2.2 weeks (p-0.001). Average time to radiological union was 13±1.4 weeks in test group while 22±2.2 weeks in control group (p-0.001). Pain score by VAS and functional outcome by DASH were improved in test group (p-0.001). There was no difference in adverse reactions in both the groups (p>0.05). Conclusion: Regular intake of TPH 20 mcg subcutaneous daily for six months can reduce time to clinical and radiological fracture union, promote early weight bearing and provide better pain control. Hence, better functional outcome and prefracture ambulatory status can be achieved with no significant adverse events.

scholarly journals Serum Periostin Level in Asthmatic Children with Exercise Induced Bronchospasm

2020 ◽  
pp. 53-67
Author(s):  
Reem M. Soliman ◽  
Mohamed B. Hamza ◽  
Rasha M. El-Shafiey ◽  
Hesham A. Elserogy ◽  
Nabil M El-Esawy
Keyword(s):  
Test Group ◽  
Mean Value ◽  
Control Group ◽  
Asthmatic Children ◽  
Group A ◽  
The Mean ◽  
Exercise Induced ◽  
Group B ◽  
And Control ◽  
Serum Periostin

Background: There are few biomarkers that can be easily accessed in clinical settings and may reflect refractory Th2-eosinophlic inflammation and remodeling of the asthmatic airways. Serum periostin may be one such biomarker to aid our understanding of the patho-bio-physiology of asthma and exercise induced asthma. The aim of the study is to explore the relationship between serum periostin level and exercise induced bronchoconstriction in asthmatic children. Materials and Methods: This cross-sectional study was carried out on (90) children both sexes aged from 6 to 15 years including, (60) children with bronchial asthma and (30) children were enrolled as control group in the period from January 2018 to January 2019. Patients were randomly classified into two groups: I) Patient group: divided into 2 groups according to standardized treadmill exercise challenge test: Group A: (30) asthmatic children with positive test. Group B: (30) asthmatic children with negative test. II-Control group: (30) children apparently healthy with no personal or family history of asthma. All children were subjected to the following Investigations: Chest x-ray, pulmonary functions tests (FEV1 & PEFR) except controls, Laboratory investigations as CBC and Serum periostin level. Results: The mean values of both the percentage of PEFR and FEV1 after exercise in group A were significantly lower than those in group B and the percentage of PEFR and FEV1 after exercise in each group were significantly lower than the percentage before exercise in the same group. The mean value of eosinophilic count in group A was significantly higher than (group B and control group) and the mean value of eosinophilic count in group B was significantly higher than control group. The mean value of serum level of periostin in group A was significantly higher than (group B and control group), however, there was no significant difference between group B and control group as regard to serum level of periostin. Chest tightness, cough and wheezes after exercise and eosinophilic count in patients with high serum periostin level were significantly higher than patients with low serum periostin level, and both PEFR and FEV1 after exercise in patients with high serum periostin level were significantly lower than patients with low serum periostin level. Also the normal serum periostin levels vary among different age groups. Conclusion: Serum periostin level can be considered as a useful biomarker for diagnosis of Exercise induced bronchospasm (EIB) in asthmatic children especially when lung function test cannot be done However, cautious is required in evaluating serum periostin levels in children because it varies with age.

scholarly journals To Compare the Effect on IOP Following Primary Trabeculectomy with MMC 0.2% versus Trabeculectomy without MMC in Primary Open Angle Glaucoma

2021 ◽  
pp. 475-480
Author(s):  
Zakaullah Gopang ◽  
Shabeer Ahmed Bhutto ◽  
Naeem Akhtar Katpar ◽  
Arslan hassan Rajper ◽  
Vijay Nagdev
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Test Group ◽  
Control Group ◽  
Open Angle ◽  
Primary Procedure ◽  
Group A ◽  
Group B ◽  
Medical University

Objective: To determine the effect on intraocular pressure following primary Trabeculectomy with MMC 0.2% versus Trabeculectomy without MMC in Primary Open Angle Glaucoma. Study Design: This is a prospective and experimental Study. Setting: Study carried out at Ophthalmology Department, Shaheed Mohtarma Benazir Bhutto Medical University Larkana, from 01-03-2020 to 31-08-2020 (06 Months). Materials and Methods: The patients with primary open angle glaucoma were selected from glaucoma clinic after taking careful history and clinical examination. Patients selected for trabeculectomy into two groups. Group A includes 43 patients while Group B also includes 43 patients. Among Group A patients adjunctive MMC 0.2mg/ml for a period of 3 minutes was used during trabeculectomy as a primary procedure (Test Group) while Group B patients were operated without MMC 0.2% (Control Group). Follow-up period of 06 months was observed in both groups. The span of study was from 01-03-2020 to 31-08-2020. Results: The total of 86 Eyes of 86 patients of POAG were included in this study. Group A patients were operated for trabeculectomy with MMC while group B patients were operated for trabeculectomy without MMC. The mean IOP before surgery of Group-A was 25.39±2.42 mmHg while in Group-B it was 26.23±4.23mmHg. At day 1 of surgery in Group-A patients IOP was 13.20±3.05 mmHg while in Group-B patients IOP, was 14.09±4.04 mmHg. After 3 months in Group-A, IOP was 13.04±3.81 mmHg in Group-B IOP was 14.01±4.18 mmHg. Out of 43 patients in Group-A, 41(95.3%) were succeeded while in Group-B, 39(90.7%)were succeeded. Significant result was found for IOP reduction after 6 months of surgeryin group-A IOP was 13.48 + 2.86 mmHg while in group-B, IOP was 15.09 ±2.64 (P=0.754). Conclusion: Trabeculectomy with MMC as a primary procedure seems to be more effective than trabeculectomy without MMC.

Evaluation of the Effect of Ozonated Plant Oils on the Quality of Osseointegration of Dental Implants Under the Influence of Cyclosporin A: An In Vivo Study

2011 ◽  
Vol 37 (2) ◽  
pp. 247-257 ◽  
Author(s):  
Amany A. El Hadary ◽  
Hala H. Yassin ◽  
Sameh T. Mekhemer ◽  
Julian C. Holmes ◽  
Martin Grootveld
Keyword(s):  
Bone Density ◽  
Cyclosporin A ◽  
Dental Implants ◽  
Immunosuppressive Agents ◽  
Control Group ◽  
Term Administration ◽  
Group A ◽  
Group B

Abstract Immunosuppressive agents have been recognized as factors that induce changes and modifications in bone metabolism. The purpose of this study was to evaluate the effect of ozonated plant extracts (herein termed ozonated oil) under the influence of Cyclosporin A (CsA) on osseointegration. A total of 20 dental implants were placed in 20 rabbit tibiae assigned to Group A or B. CsA was injected at an immunosuppressive dose in Groups A and B as a single-dose treatment. At the day of surgery, Group A received a single topical ozonated oil treatment (0.55 mL) around dental implants; Group B, the control group, received no ozonated oil. Animals were sacrificed after 8 weeks. Radiographs were obtained at implant surgery and on the day of sacrifice. Bone quality was compared between the 2 groups. Radiographically, osseointegration was microscopically evaluated using scanning electron and light microscopies. In ozonated Group A specimens, light microscopic examination demonstrated evidence of more organized mature bone compared with Group B. Within the limits of this study, the results suggest that short-term administration of CsA, when administered with topical ozonated oil, may influence bone density and the quality of dental implant osseointegration. Therefore, topically applied ozonated oil may influence bone density and the quality of osseointegration around dental implants.

scholarly journals The Influence of Reducing Diets on Changes in Thyroid Parameters in Women Suffering from Obesity and Hashimoto’s Disease

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 862
Author(s):  
Lucyna Ostrowska ◽  
Dominika Gier ◽  
Beata Zyśk
Keyword(s):  
Body Fat ◽  
Test Group ◽  
Control Group ◽  
Caloric Content ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Hashimoto’S Disease ◽  
Group A ◽  
Hashimoto's Disease ◽  
Group B

Hashimoto’s disease is listed among the most common endocrine causes of obesity. As treatment of obesity in women with Hashimoto’s disease is frequently unsuccessful, the aim of this study was to evaluate the effectiveness of two different reducing diets and their influence on changes in thyroid parameters in female patients. A six-month observational/interventional study was performed on 100 women aged 18–65 years, previously diagnosed with Hashimoto’s disease and obesity and receiving L-thyroxine. The women were randomly assigned to the test group (group A, n = 50) following elimination/reducing diets, and the control group (group B, n = 50) following reducing diets with the same caloric content (without elimination). Anthropometric and thyroid parameters were evaluated at the beginning, after 3 months and after 6 months of treatment. In both groups a significant decrease in BMI and body fat percentage was achieved, but in test group A the decrease in BMI and body fat percentage was significantly greater than in control group B (p < 0.002 and p = 0.026, respectively). Serum TSH (thyroid stimulating hormon) levels decreased significantly more in group A than in group B (p < 0.001). Group A exhibited significantly greater increases in fT4 and fT3 levels than the control group (p < 0.001) as well as significantly greater decreases in the levels anti-TPO (thyroid peroxidase) (p < 0.001) and anti-TG (thyreoglobulin) antibodies (p = 0.048). The application of reducing diets with product elimination was found to be a more beneficial tool for changing anthropometric and thyroid parameters in women suffering from obesity and Hashimoto’s disease than classic reducing diets with the same energy values and macronutrient content.

scholarly journals INVESTIGATING THE IMPACT OF GENRE-BASED TEACHING (GBT) ON EFL LEARNERS� LISTENING IMPROVEMENT

2019 ◽  
Vol 8 (1) ◽  
pp. 11
Author(s):  
Ehsan Namaziandost ◽  
Sajad Shafiee ◽  
Mehdi Nasri
Keyword(s):  
Test Group ◽  
Control Group ◽  
Proficiency Tests ◽  
Efl Learners ◽  
Fundamental Factor ◽  
Group A ◽  
Listening Proficiency ◽  
Group B ◽  
The Impact ◽  
Better Than

This study tries to investigate the impact(s) of genre-based teaching (GBT) on Iranian EFL learners� listening proficiency as well as to discover if GBT equally affects the listening proficiency of EFL learners at different proficiency levels. To fulfill this objective, 84 EFL learners were chosen. They were divided into Group A and Group B. Groups A and B consisted of 40 and 44 participants, respectively. Group A was divided into experimental and control groups and performed two listening proficiency tests for pre and posttest. Findings of one-way ANCOVA revealed that experimental group performed better than the control group due to using GBI. As indicated by the proficiency test, Group B was also divided into proficient and less-proficient groups; each one performed two listening tests for pre and posttest. Consequences of one-way ANCOVA showed both groups enhanced from pretest to posttest, however; the proficient group performed outstandingly better than the less-proficient group. The results of this study generally demonstrated that GBT is a pivotal and fundamental factor for improving listening comprehension.

scholarly journals The Effects of Dexmedetomidine on the Cognitive Function of Mild Cognitive Impairment (MCI) Rats

2021 ◽  
Author(s):  
Qian Zhou ◽  
Dongjin Xie ◽  
Ting Chen ◽  
Youguang Gao ◽  
Lanying Lin ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Escape Latency ◽  
Cell Structure ◽  
Test Group ◽  
Control Group ◽  
Inhalation Dose ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Group D

Abstract Background: The study sought to investigate the effects of dexmedetomidine on cognitive function after anesthesia and to examine its actual mechanism. Methods: A total of 48 rats were randomly divided into model Groups A, B, C, or D. Rats in Groups A, B, and C received a hypodermic injection of D-gal with a concentration of 1,000 mg·kg−1·d−1 respectively for 1 week. Group D received the same volume of saline. The Morris water maze (MWM) test was performed within 6 days of the injection. After the behavior test, Group A received an inhalation dose of 2% sevoflurane. Group B received an inhalation dose of 2% sevoflurane and an intraoperative infusion of dexmedetomidine with a concentration of 10 μg·kg−1·h−1. Group C served as the control group and received no treatment. Group D received an inhalation dose of 2% sevoflurane. Results: In relation to the model establishment, we found that there was no significant difference in body weight and swimming speed before and after modeling. There was no statistically significant difference in the escape latency between Groups A, B, C, and D before modeling. After modeling, there was no statistical difference in the escape latency between Groups A, B, and C, but the difference was statistically significant when compared to Group D (P<0.05). In relation to the dexmedetomidine intervention, we found that compared to Group C, MWM test performance in Group A and B was considerably worse (longer escape latencies and fewer platform crossings within 90 seconds), and were more significant in Group A. .Compared with Group D, the levels of IL-1, IL-6, and TNF-α of the brain homogenates were elevated, and this elevation was highest in Group A, followed by Group B; The pathological changes were consistent with changes in behavioral tests. In group A, there were obvious disorders of glial cell arrangement, apoptosis and deletion. There was no significant change in group D. And the changes of vertebral cells in group B and group C were slight, with orderly arrangement and intact cell structure.Conclusions: Dexmedetomidine inhibits the apoptosis of hippocampal cells and reduces the cognitive dysfunction of rats with MCI induced by D-galactose via the inhibition of the release of inflammatory cytokines.

scholarly journals A CONTROLLED CLINICAL STUDY TO EVALUATE THE EFFICACY OF KARPASASTHYADI TAILA NASYAKARMA IN THE MANAGEMENT OF GREEVA ASTHIGATAVATA VIS- A-VIS CERVICAL SPONDYLOSIS

2021 ◽  
Vol 09 (1) ◽  
pp. 63-72
Author(s):  
Asha Rani K ◽  
Umashankar. K. S
Keyword(s):  
Clinical Study ◽  
Cervical Spondylosis ◽  
Test Group ◽  
Control Group ◽  
P Value ◽  
Contingency Coefficient ◽  
Group A ◽  
Group B ◽  
B Test ◽  
Controlled Clinical Study

Asthigatavata is one among Shoola and Shosha Pradhana Vatavyadhi characterized by Asthishosha (Osteoporosis), Asthibheda (Cutting pain in bony joints), Asthishoola, Sandhishoola (Joint pain), Bedhaasthiparvanam (Splitting pain in bones and joints), Mamsabalakshaya (Loss of muscle strength), Aswapna (Insomnia) and Satata Ruk (Continuous pain). When Kupitha Vata Dosha enters in to the Asthi present in Greevapradesha causes series of changes producing symptoms and this clinical entity is named as Greeva Asthigatavata. Cervical Spondylosis is seen in the general population with the incidence rate of 83 per 100,000 and occurs mostly in fourth and fifth decades of life. More disability is seen over the age of 50years. Its prevalence is similar for both the sex, although the degree of severity is greater for males. Aim: To evaluate the therapeutic efficacy of Karpasasthyadi Taila Nasyakarma in the management of Greeva Asthigatavata vis-à-vis Cervical Spondylosis. Materials and Methods: It was a controlled clinical study with pre and posttest design. Total 100 subjects were incidentally selected and assigned into two groups viz., Group A (Control group) and Group B (Test group), with 50 subjects in each group. Subjects of Control Group were subjected with Greevabasti with Mahamasha Taila for 7 consecutive days and Astavarga Kashaya internally for 14 consecutive days from the first day of Greevabasti. Subjects of Test Group were subjected to Nasyakarma with Karpasasthyadi Taila for 7 consecutive days along with Greevabasti with Mahamasha Taila for 7 consecutive days and Astavarga Kashaya internally for 14 consecutive days from the first day of Nasyakarma. The study consisted of 3 assessments i.e on 0th day, 7th day and on 14th day. Result: In the study it was observed that Group B (CC=0.529) showed clinically and statistically highly significant results with respect to reduction of symptoms than Group A (CC=0.389) with high contingency coefficient value. Also, the overall assessment showed clinically and statistically highly significant result in both groups with p value 0.000. Conclusion: On comparing the overall effect of the study, trial group (Group B) showed better results than control group (Group A). Hence, Karpasasthyadi Taila has a better role in the management of Greeva Asthigatavata.

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