scholarly journals Comparative Evaluation of Two Types of Immediately Loaded Implants Using Biomechanical and Histomorphometric Tests: An Animal Case Study

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Mansour Rismanchian ◽  
Bijan Movahedian ◽  
Navid Khalighinejad ◽  
Hamid Badrian ◽  
Sayed Mohammad Razavi ◽  
...  
Keyword(s):  
Success Rates ◽  
Bone Contact ◽  
Removal Torque ◽  
Bone Implant ◽  
Break Bone ◽  
Significant Difference ◽  
The Mean ◽  
And Function ◽  
Surrounding Bone

Introduction. In order to minimize the required time to regain esthetic and function, immediately loaded implants were suggested. The aim of this study was to comparatively evaluate the Nisastan and XIve implants using biomechanical and histomorphometric tests. Materials and Methods. In this experimental study, 6 Nisastan one-piece immediately loaded screw type implant (OPILS) and 6 Xive implants with 3.4 mm diameter and 11 mm long were used. The implants were immediately loaded with temporary coating. After three months, the torque required to break bone-implant contact was measured and was recorded. All implants were extracted with surrounding bone and histologically were evaluated. The data were inputted into the SPSS 11.5 to run student T-test statistical analyses (). Results. The success rates of both types of implants was 100%, and none of them failed due to mobility or bone loss. The mean removal torque value (RTV) was 142.08 and 40 N/Cm for Xive and Nisastan implants, respectively, and their RTVs showed a significant difference between two mentioned implants (). None of the histomorphometric values showed significant differences between the two implants (). Discussion. both systems have the capability to induce osseointegration under immediate loads but that Xive implants showed higher capability for bone contact.

scholarly journals Assessment of the Tissue Response to Modification of the Surface of Dental Implants with Carboxyethylphosphonic Acid and Basic Fibroblastic Growth Factor Immobilization (Fgf-2): An Experimental Study on Minipigs

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 358
Author(s):  
Javier Aragoneses ◽  
Ana Suárez ◽  
Nansi López-Valverde ◽  
Francisco Martínez-Martínez ◽  
Juan Manuel Aragoneses
Keyword(s):  
Surface Treatment ◽  
Test Group ◽  
Mean Value ◽  
Control Group ◽  
P Value ◽  
Implant Surface ◽  
Bone Contact ◽  
Bone Implant ◽  
Significant Difference ◽  
The Mean

The aim of this study was to evaluate the effect of implant surface treatment with carboxyethylphosphonic acid and fibroblast growth factor 2 on the bone–implant interface during the osseointegration period in vivo using an animal model. The present research was carried out in six minipigs, in whose left tibia implants were inserted as follows: eight implants with a standard surface treatment, for the control group, and eight implants with a surface treatment of carboxyethylphosphonic acid and immobilization of FGF-2, for the test group. At 4 weeks after the insertion of the implants, the animals were sacrificed for the histomorphometric analysis of the samples. The means of the results for the implant–bone contact variable (BIC) were 46.39 ± 17.49% for the test group and 34.00 ± 9.92% for the control group; the difference was not statistically significant. For the corrected implant–bone contact variable (BICc), the mean value of the test group was 60.48 ± 18.11%, and that for the control group, 43.08 ± 10.77%; the difference was statistically significant (p-value = 0.035). The new bone formation (BV/TV) showed average results of 27.28 ± 3.88% for the test group and 26.63 ± 7.90% for the control group, meaning that the differences were not statistically significant (p-value = 0.839). Regarding the bone density at the interthread level (BAI/TA), the mean value of the test group was 32.27 ± 6.70%, and that of the control group was 32.91 ± 7.76%, with a p-value of 0.863, while for the peri-implant density (BAP/TA), the mean value of the test group was 44.96 ± 7.55%, and that for the control group was 44.80 ± 8.68%, without a significant difference between the groups. The current research only found a significant difference for the bone–implant contact at the cortical level; therefore, it could be considered that FGF-2 acts on the mineralization of bone tissue. The application of carboxyethylphosphonic acid on the surface of implants can be considered a promising alternative as a biomimetic coating for the immobilization of FGF-2. Despite no differences in the new bone formation around the implants or in the interthread or peri-implant bone density being detected, the biofunctionalization of the implant surface with FGF-2 accelerates the mineralization of the bone–implant interface at the cortical level, thereby reducing the osseointegration period.

scholarly journals Torque Analysis of Self-drilling Mini-screws placed with and without a Pilot Drill: A Canine Study

2014 ◽  
Vol 4 (2) ◽  
pp. 77-86
Author(s):  
Eric S Solomon ◽  
David G Kerns ◽  
William W Hallmon ◽  
Daniela A Zambon-Fagundes
Keyword(s):  
Success Rate ◽  
Test Group ◽  
Control Group ◽  
Success Rates ◽  
Removal Torque ◽  
Implant Placement ◽  
Significant Difference ◽  
Torque Analysis ◽  
The Mean ◽  
Canine Study

ABSTRACT Purpose The use of temporary anchorage devices (TADs), such as mini-screws, palatal implants and mini-plates, has become a popular treatment option in orthodontics. The objectives of this study were: (1) to compare the success rates of self-drilling mini-screws placed with or without use of a pilot drill, (2) to evaluate the implant placement torque (IPT) of self-drilling miniscrews and (3) to measure the removal torque of self-drilling mini-screws. Materials and methods Six American foxhounds served as subjects in this study. Three OsteoMed self-drilling mini-screws (1.6 mm diameter and 8 mm length) were planned to be placed in each side of the mandible between the roots of the teeth canine/premolar 1 (PM1), PM2/PM3 and PM3/PM4. The sites were allocated randomly in: (1) control group—mini-screws placed with pilot drill and (2) test group—mini-screws placed without pilot drill (self-drilling). The implant placement torque (IPT) and the number of turns performed by the mini-screws during placement were measured. After a healing period of 6 weeks, the mini-screws were removed, and the removal torque was measured. Results A total of 33 mini-screws were placed in six animals. After 6 weeks, the success rate for the control and test groups were 46.7 and 80% respectively (difference not statistically significant). There was no statistically significant difference in the terminal mean IPT values and the mean number of turns for failed and successful mini-screws. The difference between the mean IPT values at the 3rd turn during mini-screw placement in the successful and failed mini-screws (5.56 and 14.03 Ncm respectively) was statistically significant (p < 0.01). Conclusion There was no statistically significant difference in the success rate between self-drilling mini-screws that did or did not have osteotomies (46 vs 80% respectively). However, the IPT at the third revolution for successful mini-screws averaged 5.56 Ncm (p < 0.01). How to cite this article Zambon-Fagundes DA, Kerns DG, Hallmon WW, Solomon ES. Torque Analysis of Self-Drilling Mini-screws placed with and without a Pilot Drill: A Canine Study. J Contemp Dent 2014;4(2):77-86.

Section plane selection influences the results of histomorphometric studies: the example of dental implants

2012 ◽  
Vol 57 (5) ◽  
Author(s):  
Sigmar Kopp ◽  
Mareike Warkentin ◽  
Ferenc Öri ◽  
Peter Ottl ◽  
Günther Kundt ◽  
...  
Keyword(s):  
Section Plane ◽  
Section Thickness ◽  
Implant Surface ◽  
Bone Implant ◽  
Osseointegrated Implants ◽  
Section Technique ◽  
Significant Difference ◽  
Bone To Implant Contact ◽  
The Mean ◽  
Dependent Samples

AbstractThis study was designed to determine and statistically analyze bone-to-implant contact (BIC) values for human specimens segmented in at least two different locations.Samples of human bone with fractured osseointegrated implants were obtained from six patients. Sections were prepared, dehydrated, and resin infiltrated. Undecalcified bone sections were produced using the thin-section technique according to Donath, ultimately obtaining a section thickness of approximately 20 μm. Fifteen specimens were available for histomorphometry. The bone sections were digitized and analyzed. The bone-to-metal contact (BMC) parameter was determined histomorphometrically. The BMC was returned in terms of the visibly bone-covered implant surfaces as a percentage of the total implant surface shown.The values obtained for the six implants were arranged as six maximum-distance pairs and tested for significance using the t-test for dependent samples. The mean difference in BIC was 11.69±9.79%. The two-sided test showed a significant difference (p=0.033).The accidental or deliberate choice of section plane for a bone-implant block has an influence on the BIC value. To make BIC values more comparable, a standardization of section planes is desirable.

scholarly journals Differences of Post-Placement Bone Implant Contact (BIC) Value of Dental Implant Coated and Not Coated With Platelet Rich Plasma (PRP)

2017 ◽  
Vol 10 (2) ◽  
pp. 11
Author(s):  
Bahruddin Thalib ◽  
Edy Machmud ◽  
Mochammad Dharmautama ◽  
Ervina Sari Surya ◽  
Asmawati Asmawati ◽  
...  
Keyword(s):  
Dental Implant ◽  
Platelet Rich Plasma ◽  
Control Group ◽  
Bone Implant ◽  
Significant Difference ◽  
Experimental Laboratory ◽  
The Mean ◽  
And Control ◽  
Veterinary Faculty ◽  
Implant Treatment

OBJECTIVE: The success of a dental dental implant treatment focuses on a phenomenon called osseointegration. Evaluation of Bone Area (BA) and Bone-Dental implant Contact (BIC) through histomorphometric analysis is the most widely used parameter to measure osseointegration. The aim of this study was to see post-placement Bone Dental implant Contact (BIC) value of dental implant coated and not coated with PRP.MATERIALS & METHODS: This study was an experimental laboratory conducted at Laboratory of Veterinary Faculty, Hasanuddin University. The sample was baby buck rabbit, aged 4-8 months old, weight 1500–2000 gram, divided into 2 groups each group consist of 12 rabbit, control group not coated with PRP and treatment group coated with PRP. Data analysis using SPSS version 20.0 (SPSS Inc., Chicago, IL, USA).RESULTS: There was a significant difference between the mean BIC values and the 20% increase in BIC values in LP1, LP2 and LP3 between treatment and control group on day 0, 3, 7, and 14.CONCLUSIONS: There was a difference in the average of post-placement BIC value of dental implant coated and not coated with PRP.

scholarly journals P277 RV remodeling by echo parameters in endurance and strength sport training

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
M Moshkani Farahani ◽  
M Shirdel
Keyword(s):  
Endurance Exercise ◽  
Performance Status ◽  
Exercise Group ◽  
Strength Group ◽  
Sport Training ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
And Gender ◽  
And Function

Abstract Introduction With regular and long-term exercises, the heart undergoes changes that are called the adaptation of the heart in response to exercise or physiological changes, which contrasts with the pathological changes caused by hypertension and aortic valve stenosis. However, the exact effects of exercise on the structure and function of the heart depend on the type, intensity and duration of exercise, the amount of physical fitness, inheritance, and gender. Materials and Methods In this prospective clinical trial study, 40 subjects, including 20 in the endurance exercise group and 20 in the exercise group, were evaluated. Echocardiography was performed for all of these subjects before and after the exercises that was performed professionally for 8 weeks under the supervision of the trainer and the changes were recorded. The data were analyzed statistically by SPSS20 software. A significant level of 0.05 was considered. Results The mean ± standard deviation of the age was 20/80 ± 1/42 years. Significant decrease in mean RVSM was observed only in the strength group (P = 0.008). There was no significant difference in the endurance group . There was no significant difference between the two groups before the test in the mean TAPSE (P = 0.46). The mean of TAPSE in the endurance group was 0.22 ± 1.99 and in the strength group was 0.31 ± 1.95. There was no significant difference between the two groups (P 0.46). There was no significant difference between the two groups before the test in the mean E / e (P = 0.51). The mean E / e "in the endurance group was 0.47 ± 4.75 and in the strength group was 0.54 ± 5.50, and there was a significant difference between the two groups (P &lt;0.001). The mean SWDT in the endurance group was 0.12 ± 0.95 and in the strength group was 0.11 ± 1.06, and there was a significant difference between the two groups (P = 0.002). There was a significant increase in mean SWDT in the strength group after the test (P &lt;0.001) .There was a significant increase in mean PAP in the strength group (P = 0.007) . There was a significant increase in mean LV mass index in the strength group (P &lt;0.001),with no significant difference between the two groups in mean FAC. Conclusion It seems that any kind of strength and endurance exercise affects the performance status, however, strength exercises have more effects which causes RV dysfunction. All indexes measured changed within normal level except for PAP that had abnormal changes after endurance exercise .

scholarly journals Surgical Outcome of Medial Rectus Resection in Recurrent Exotropia: A Novel Surgical Formula

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Abbie Sheung-Wan Luk ◽  
Jason Cheuk-Sing Yam ◽  
Henry Hing-Wai Lau ◽  
Wilson Wai-Kuen Yip ◽  
Alvin Lerrmann Young
Keyword(s):  
Retrospective Study ◽  
Subgroup Analysis ◽  
Surgical Outcome ◽  
Large Angle ◽  
Medial Rectus ◽  
Success Rates ◽  
Significant Difference ◽  
Recurrent Exotropia ◽  
The Mean ◽  
Successful Outcomes

Purpose. To evaluate the surgical outcomes of unilateral or bilateral medial rectus (MR) muscle resection for recurrent exotropia after bilateral lateral rectus (BLR) muscle recession based on a novel surgical formula.Methods. Forty-one consecutive patients with unilateral or bilateral MR muscle resection for recurrent exotropia after BLR muscle recession were included in this retrospective study. All surgeries were performed according to the formula: 1.0 mm MR muscle resection for every 5 prism dioptres (PD) of exotropia, with an addition of 0.5 mm to each MR muscle operated on.Results. The mean recurrent exotropia distant deviation was 28 PD ± 11.2 (range 14 to 55 PD). Overall at postoperative 1 month, 36 (88%) achieved successful outcomes, 4 (10%) had undercorrection, and 1 (2%) had overcorrection. At postoperative 6 months, 29 (71%) achieved successful outcomes, 12 (29%) had undercorrection, and none had overcorrection. Subgroup analysis showed no statistically significant difference in success rates between unilateral and bilateral MR groups.Conclusion. Unilateral or bilateral MR muscle resection using our surgical formula is a safe and effective method for calculating the amount of MR resection in moderate to large angle recurrent exotropia, with a low overcorrection rate.

scholarly journals Trio-preparation of Health Care Students for Digital Era in Universiti Malaysia Sabah – Case Study

2019 ◽  
pp. 31
Author(s):  
Maher Safien ◽  
Deena C Thomas ◽  
Richard Avoi ◽  
Mohamed Firdaus ◽  
Fairrul Bin Masnah Kadir ◽  
...  
Keyword(s):  
Health Care ◽  
Medical Students ◽  
Nursing Students ◽  
Educational Environment ◽  
Health Care Students ◽  
Digital Era ◽  
Significant Difference ◽  
The Mean ◽  
The Impact

Introduction: Creating an educational climate that engages the students in the digital era is crucial as it prepares them for the future.Objectives: The aim of this multiple case study is to highlight the impact of creative educational environment on the students’ awareness of digital era tools.Methods: In this study three activities were organized. Firstly, a brain storming seminar titled “Medical Practice in Artificial Intelligence Era” was held. The second event was E-poster competitions which challenged the students’ curiosity to address the health problems and to introduce innovative solutions to solve it. Medical and nursing students presented 32 posters. Third activity was MeDuino, a hands-on workshop to familiarize the students with arduino technology in medical practice.Results: Around 260 participants attended the seminar. In their feedback, 72% of students found the topics attractive and more than 60% found its theme relevant and beneficial. E-poster competition was evaluated using a modified rubric scale. The data was analysed by SPSS showed that only “creativity” and “practicality” merits scored little above the mean range. There was no statistically significant difference in the mean score of ‘creativity’ and ‘practicality’ between medical students and nursing students. However, in general medical students’ scores were higher compared to nursing students. 90% of students said that they improved cognitively and 85% found it fascinating. In Meduino workshop (Robotics), The 30 participants practiced mini projects. 86 % found it attractive, 81% expressed that it improve d their cognitive about technology as noted in comparing the pre and post- event questionnaires. The students’ concerns included the time constraints short time and lack of lecturers’ guidance during posters’ preparation.Conclusion(s): Transforming educational environment physically, emotionally and socially managed to address few aspects digital era. Allocating more time, facilities and training in the informal curriculum could enhance health-care students mastering of future tools.International Journal of Human and Health Sciences Supplementary Issue: 2019 Page: 31

scholarly journals The COVID-19 Pandemic and the Challenges of E-Assessment of Calculus Courses in Higher Education: A Case Study in Saudi Arabia

2021 ◽  
Vol 20 (3) ◽  
pp. 265-281
Author(s):  
Fatima M Azmi ◽  
Heba Bakr Khoshaim
Keyword(s):  
Saudi Arabia ◽  
Private University ◽  
Spring Semester ◽  
Mathematical Concepts ◽  
Statistical Tool ◽  
Significant Difference ◽  
The Mean ◽  
Exam Scores ◽  
Mean Differences

The COVID-19 pandemic has affected many aspects of our lives, including education. Due to this unexpected catastrophe, education has shifted to virtual-learning and auto-grading models in most parts of the world. This study explores the validity and appropriateness of auto-grading-assessment for online exams by comparing students’ online exam scores where they are first auto-graded and then manually graded. Furthermore, it investigates whether the mean differences in their scores are statistically significant. The study included two calculus courses taught by the authors, during the spring semester 2019-2020 at a private university in Saudi Arabia. The online exam was performed on the WebAssign platform, which has built-in calculus questions. The sample consisted of fifty-five students who were registered on those calculus courses. The quantitative data was analysed using the SPSS statistical tool. A paired t-test at an alpha level of 0.05 was performed on differences in mean exam scores between auto-graded and manually-graded scores. The statistical analysis results revealed a statistically significant difference in students' mean scores. Our findings illustrate the importance of human intelligence, its role in assessing students' achievements and understanding of mathematical concepts, and the extent to which instructors can currently rely on auto-grading. A careful manual investigation of auto-graded exams revealed different types of mistakes committed by students. Those mistakes were characterized into two categories: non-mathematical mistakes (related to Platform Design) and minor mathematical mistakes, which might deserve partial credit. The study indicated a need to reform the auto-grading system and provided some suggestions to overcome its setbacks.

scholarly journals 2017–2018 Assisted Reproduction Cost Analysis Performance Indexes: Lombardy County Case Study

2021 ◽  
Vol 3 ◽  
Author(s):  
Paolo Emanuele Levi-Setti ◽  
Andrea Busnelli ◽  
Annalisa Bodina ◽  
Roberto De Luca ◽  
Giulia Scaravelli
Keyword(s):  
Embryo Transfer ◽  
Multiple Pregnancy ◽  
Economic Cost ◽  
Oocyte Retrieval ◽  
Delivery Rate ◽  
Success Rates ◽  
Performance Indexes ◽  
Significant Difference ◽  
The Mean ◽  
Lost To Follow Up

Objective: The aim of the present study was to analyze the IVF success rates and the economic cost per delivery in all the public funded IVF Units in Lombardy in the 2017–2018 period and to assess any significant difference in ART outcomes among the enrolled centers.Methods: Analysis of costs for the 2017 and 2018 fresh transfer delivery rate (DR) and Cumulative delivery rate (CDR) considering both fresh and frozen cycles were extracted from the ART Italian Registry on oocytes retrievals, fresh and frozen embryos and oocytes embryo transfer performed in 22 Lombardy IVF Units.Results: In 2017, 29,718 procedures were performed, resulting in 4,543 pregnancies and 3,253 deliveries. In 2018, there were 29,708 procedures, 4,665 pregnancies and 3,348 deliveries. Pregnancies lost to follow up were 5.0% with a (range of 0–67.68%) in 2017 and 3.4% (range of 0–45.1%) in 2018. The cost reimbursement for the cycles were €2,232 ($2,611) for oocyte retrieval and €2,194 ($2,567) for embryo transfer, excluding ovarian stimulation therapy and luteal phase support. 19.33 (5.80). The DR was 13.23 ± 5.69% (range 2.86–29.11%) in 2017 and 19.33 ± 5.80% in 2018 (range 11.82–34.98 %) and the CDR was 19.86 ± 9.38% (range 4.43–37.88%) in 2017 and 21.32 ± 8.84% (range 4.24–37.11%). The mean multiple pregnancy delivery rate (MDR) was 11.08 ± 5.55% (range 0.00–22.73%) in 2017 and 10.41 ± 4.99% (range 1.33–22.22%) in 2018. The mean CDR cost in euros was 26,227 ± 14,737 in 2017 and 25,018 ± 16,039 in 2018. The mean CDR cost among centers was 12,480 to 76,725 in 2017 and 12,973 to 86,203 in 2018.Conclusions: Our findings show impressive differences in the DR and CDR among centers and the importance of cryopreservation in patients' safety and economic cost reduction suggesting the formulation of specific KPI's (Key performance indexes) and minimal performance indexes (PI) as a basis for the allocation of public or insurance resources. In particular, the reduction of multiple pregnancy rates costs, may lead to a more widespread use of ART even in lower resources countries.

scholarly journals COMPLICATED INGUINAL HERNIAS;

2019 ◽  
Vol 26 (03) ◽  
Author(s):  
Naveed Akhtar ◽  
Syed Shams- Ul-Hassan ◽  
Muhammad Sabir ◽  
M. Nauman Ashraf
Keyword(s):  
Inguinal Hernia ◽  
Hospital Stay ◽  
Wound Infection ◽  
P Value ◽  
Emergency Setting ◽  
Complication Rates ◽  
Success Rates ◽  
Inguinal Hernias ◽  
Significant Difference ◽  
The Mean

Background: Herniorrhaphy and hernioplasty are the two most common modalities used with different degree of success and complication rates in the treatment of inguinal hernia. Several studies show that use of mesh is superior to the non-mesh operations in inguinal hernia surgery.It is generally believed that the use of biomaterials should be limited to non-infected surgical fields.Now the concept regarding use of mesh in complicated hernias is changing as shown by many studies. Current study is being planned to observe the outcomes of the mesh hernioplasty in treatment of complicated inguinal hernias in emergency so that in future appropriate and safe technique may be suggested for repair of complicated hernias in emergency setting. Objectives: To compare the outcome of hernioplasty and herniorrhaphy in emergency for the treatment of complicated (Irreducible/obstructed) inguinal hernias regarding wound infection and hospital stay. Material & Methods:… Study Design: Randomized control trial. Setting: Surgical ward, Sheikh Zayed Hospital, Rahim yar khan. Period:09 months from 01-01-2016 to 30-09-2016. Sample Size: A total of 64 patients with 32 patients were included in each group, with confidence level of 95% and power of 80% and anticipated mean level of hospital stay in group 1 of 5±3.4 days versus 3±2.1 days in group 2. Sampling Technique: Non-probability, consecutive sampling. Results: In this study there were total 64 cases with 32 in each group. The mean age was 41.69±11.06 years and the mean duration of hernia obstruction was 12.83±4.97 hours. There was no significant difference in terms of age, duration of hernia and hernial obstruction between both groups. Seroma was seen in 5 (7.81%) out of 64 cases while wound infection was seen in 8 (12.50%) of cases. Seroma was seen in 2 (6.25%) out of 30 cases in herniorrhaphy as compared to 3 (9.38%) out of 32 cases with hernioplasty with p value of 0.64. Wound infection was seen in equally 4 (12.50%) out of 32 cases in both groups with p value of 1.0. Duration of hospital stay was 4.66±1.36 in patients with herniorrhaphy as compared to 4.53±1.37 days with hernioplasty with p value= 0.82. There was no significant difference in terms of age groups, duration of hernia and its obstruction between both groups regarding seroma. There was also no significant association among any of the confounding factors regarding the wound infection and length of the hospital stay between the both groups. Conclusion: We can perform hernioplasty as compared to herniorrhaphy for complicated inguinal hernia with similar complications and better success rates in the same emergency setting.

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