scholarly journals The Effect of Threads Geometry on Insertion Torque (IT) and Periotest Implant Primary Stability: A High-Density Polyurethane Simulation for the Anterior Mandible

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 308
Author(s):  
Stefano Fanali ◽  
Margherita Tumedei ◽  
Pamela Pignatelli ◽  
Morena Petrini ◽  
Adriano Piattelli ◽  
...  
Keyword(s):  
Primary Stability ◽  
High Density ◽  
Insertion Torque ◽  
Mean Values ◽  
Implant Positioning ◽  
Thread Profile ◽  
Group A ◽  
Group B ◽  
Torque Values ◽  
Anterior Mandible

The implant geometry provides a key role in the osseointegration process and is able to improve the mechanical interaction and primary stability into the bone tissue. The aim of the present investigation was to compare different implant profiles to evaluate their influence on the primary stability on high-density polyurethane block. Methods: A total of 100 implants were used on 20 pcf polyurethane density in the present investigation, i.e., 20 implants for each of 5 groups (A, B, C, D, and E), characterized by different thread pitch and geometry. The insertion torque (IT), and Periotest mean values were recorded during the implant positioning. Results: Mean values for insertion torque values were higher for the group C and group E implant profiles when compared to all other groups (p < 0.01). No significant differences were detected between these two groups (p < 0.05). Lower IT (<20 Ncm2) were presented by groups A, B, and D (p < 0.05). All groups showed negative Periotest values. Group C implants showed the lowest level of Periotest values (p < 0.05). No significant Periotest differences were found between group B and group D and between group A and group E (p > 0.05). Conclusions: Implants with a wider and V-thread profile and a round apex showed a higher stability in a standardized polyurethane foam. Their use could be suggested in high-density bone in clinical practice.

scholarly journals Primary Stability of Dental Implants in Low-Density (10 and 20 pcf) Polyurethane Foam Blocks: Conical vs Cylindrical Implants

2020 ◽  
Vol 17 (8) ◽  
pp. 2617 ◽  
Author(s):  
Luca Comuzzi ◽  
Margherita Tumedei ◽  
Ana Emilia Pontes ◽  
Adriano Piattelli ◽  
Giovanna Iezzi
Keyword(s):  
Primary Stability ◽  
Insertion Torque ◽  
Low Density ◽  
Implant Stability ◽  
Implant Stability Quotient ◽  
Pull Out ◽  
Group A ◽  
Group B ◽  
Torque Values ◽  
Clinical Conditions

Background: The aim of the present study was to compare, in low-density polyurethane blocks, the primary implant stability values (micromobility) and removal torque values of three different implant geometries in two different bone densities representing the structure of the human posterior jaws. Methods: A total of 60 implants were used in the present investigation: twenty implants for each of three groups (group A, group B, and group C), in both polyurethane 10 pcf and 20 pcf densities. The insertion torque, pull-out torque, and implant stability quotient (ISQ) values were obtained. Results: No differences were found in the values of Group A and Group B implants. In both these groups, the insertion torques were quite low in the 10 pcf blocks. Better results were found in the 20 pcf blocks, which showed very good stability of the implants. The pull-out values were slightly lower than the insertion torque values. High ISQ values were found in Group A and B implants. Lower values were present in Group C implants. Conclusions: The present investigation evaluated implants with different geometries that are available on the market, and not experimental implants specifically created for the study. The authors aimed to simulate real clinical conditions (poor-density bone or immediate post-extraction implants) in which knowledge of dental implant features, which may be useful in increasing the primary stability, may help the oral surgeon during the surgery planning.

scholarly journals Implant Stability in the Posterior Maxilla: A Controlled Clinical Trial

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Raquel Zita Gomes ◽  
Mario Ramalho de Vasconcelos ◽  
Isabel Maria Lopes Guerra ◽  
Rute Alexandra Borges de Almeida ◽  
Antonio Cabral de Campos Felino
Keyword(s):  
Primary Stability ◽  
Controlled Clinical Trial ◽  
Insertion Torque ◽  
Success Rates ◽  
Implant Stability ◽  
Native Bone ◽  
Posterior Maxilla ◽  
Group A ◽  
Group B ◽  
Secondary Stability

Aim. To evaluate the primary and secondary stability of implants in the posterior maxilla. Methods. Patients were allocated into three groups: (A) native bone, (B) partially regenerated bone, and (C) nearly totally regenerated bone. Insertion torque (IT) and implant stability quotient (ISQ) were measured at placement, to evaluate whether satisfactory high primary stability (IT ≥ 45 N/cm; ISQ ≥ 60) was achieved; ISQ was measured 15, 30, 45, and 60 days after placement, to investigate the evolution to secondary stability. Results. 133 implants (Anyridge®, Megagen) were installed in 59 patients: 55 fixtures were placed in Group A, 57 in Group B, and 21 in Group C. Fifty-two implants had satisfactory high primary stability (IT ≥ 45 N/cm; ISQ ≥ 60). A positive correlation was found between all variables (IT, ISQ at t = 0, t = 60), and statistically higher IT and ISQ values were found for implants with satisfactory high primary stability. Significant differences were found for IT and ISQ between the groups (A, B, and C); however, no drops were reported in the median ISQ values during the healing period. Conclusions. The evaluation of the primary and secondary implant stability may contribute to higher implant survival/success rates in critical areas, such as the regenerated posterior maxilla. The present study is registered in the ISRCTN registry with ID ISRCTN33469250.

scholarly journals Implant stability and marginal bone level of microgrooved zirconia dental implants: A 3-month experimental study on dogs

2014 ◽  
Vol 71 (5) ◽  
pp. 451-461 ◽  
Author(s):  
Rafael Delgado-Ruíz ◽  
Aleksa Markovic ◽  
Luís Calvo-Guirado ◽  
Zoran Lazic ◽  
Adriano Piattelli ◽  
...  
Keyword(s):  
Experimental Study ◽  
Dental Implants ◽  
Insertion Torque ◽  
Implant Stability ◽  
Removal Torque ◽  
Group A ◽  
Bone Level ◽  
Group B ◽  
Torque Values ◽  
And Control

Background/Aim. The modification of implant surfaces could affect mechanical implant stability as well as dynamics and quality of peri-implant bone healing. The aim of this 3-month experimental study in dogs was to investigate implant stability, marginal bone levels and bone tissue response to zirconia dental implants with two laser-micro-grooved intraosseous surfaces in comparison with nongrooved sandblasted zirconia and sandblasted, high-temperature etched titanium implants. Methods. Implant surface characterization was performed using optical interferometric profilometry and energy dispersive X-ray spectroscopy. A total of 96 implants (4 mm in diameter and 10 mm in length) were inserted randomly in both sides of the lower jaw of 12 Fox Hound dogs divided into groups of 24 each: the control (titanium), the group A (sandblasted zirconia), the group B (sandblasted zirconia plus microgrooved neck) and the group C (sandblasted zirconia plus all microgrooved). All the implants were immediately loaded. Insertion torque, periotest values, radiographic crestal bone level and removal torque were recorded during the 3-month follow-up. Qualitative scanning electon micro-scope (SEM) analysis of the bone-implant interfaces of each group was performed. Results. Insertion torque values were higher in the group C and control implants (p < 0.05). Perio-test values increased in all the periods in proportion to the ex-tent of microgrooving as follows: the group C > the control > the group B > the group A (p < 0.05). Radiographic measurements showed minimal crestal bone loss at 3 months for microgrooved zirconia implants (groups C and B) and control implants compared with the group A implants (p < 0.05). The removal torque values increased with time for all the groups as follows: the group C > the control > the group B > the group A (p < 0.05). SEM showed that implant surfaces of the groups B and C had an extra bone growth inside the microgrooves that corresponded to the shape and direction of the microgrooves. Conclusion. The addition of micro-grooves to the entire intraosseous surface of zirconia dental implants enhances primary and secondary implant stability, promotes bone tissue ingrowth and preserves crestal bone levels.

Comparative Study of effectiveness of mobilization with movement (MWM) and End range mobilization (ERM) techniques in frozen shoulder

2018 ◽  
Vol 4 (4) ◽  
pp. 519-522
Author(s):  
Jeyakumar S ◽  
Jagatheesan Alagesan ◽  
T.S. Muthukumar
Keyword(s):  
Range Of Motion ◽  
Frozen Shoulder ◽  
Type I ◽  
Mean Values ◽  
Functional Activities ◽  
Group A ◽  
The Mean ◽  
Group B

Background: Frozen shoulder is disorder of the connective tissue that limits the normal Range of motion of the shoulder in diabetes, frozen shoulder is thought to be caused by changes to the collagen in the shoulder joint as a result of long term Hypoglycemia. Mobilization is a therapeutic movement of the joint. The goal is to restore normal joint motion and rhythm. The use of mobilization with movement for peripheral joints was developed by mulligan. This technique combines a sustained application of manual technique “gliding” force to the joint with concurrent physiologic motion of joint, either actively or passively. This study aims to find out the effects of mobilization with movement and end range mobilization in frozen shoulder in Type I diabetics. Materials and Methods: 30 subjects both male and female, suffering with shoulder pain and clinically diagnosed with frozen shoulder was recruited for the study and divided into two groups with 15 patients each based on convenient sampling method. Group A patients received mobilization with movement and Group B patients received end range mobilization for three weeks. The outcome measurements were SPADI, Functional hand to back scale, abduction range of motion using goniometer and VAS. Results: The mean values of all parameters showed significant differences in group A as compared to group B in terms of decreased pain, increased abduction range and other outcome measures. Conclusion: Based on the results it has been concluded that treating the type 1 diabetic patient with frozen shoulder, mobilization with movement exercise shows better results than end range mobilization in reducing pain and increase functional activities and mobility in frozen shoulder.

scholarly journals Effects of Swiss ball exercise and Pilates exercise on core muscle strengthening in college cricketers

Biomedicine ◽  
2020 ◽  
Vol 40 (3) ◽  
pp. 377-380
Author(s):  
K. Kamatchi ◽  
B. Arun ◽  
G. Tharani ◽  
G. Yuvarani ◽  
G. Vaishnavi ◽  
...  
Keyword(s):  
Mean Value ◽  
Terminal Segment ◽  
Core Stability ◽  
Lower Limbs ◽  
Age Group ◽  
Mean Values ◽  
Muscle Strengthening ◽  
Group A ◽  
Group B ◽  
Swiss Ball

Introduction and Aim: Cricket is one of the most popular game in India played by men and women of all ages. Core stability is defined as the ability to control the position and movement of the trunk over the pelvis to allow optimum production, transfer and control of force and movement to the terminal segment. Major muscles involved are pelvic floor muscles, Transverse abdominis, multifidus, internal and external obliques, and rectus abdominis. Core is used to stabilize the thorax and the pelvis during dynamic movement. The study helps to compare the effectiveness of Swiss ball exercise and Pilates exercise on gaining core muscle strength. The aim of the study is to compare the effect of Swiss ball exercise and Pilates exercise on core muscle strengthening in college cricketers. Materials and Methods: The design of the study is comparative type. The study was carried out in faculty of Physiotherapy, Dr.M.G.R. Educational and Research Institute. The study sample of 30 male college cricketers between the age group of 18 to 25 years are included in the study. Individuals with associated neuromuscular conditions, any injuries to lower limbs and any spinal injuries have been excluded in the study. Swiss ball and Pilates mat are the materials used. Sphygmomanometer is the outcome measure.30 male individuals between the age group of 18 to 25 years were divided into two groups, group A and group B. Individuals in the group A (n=15) received the Swiss ball exercise and group B (n=15) received Pilates exercise for 4 session/ week for 6 weeks. Results: On comparing the mean values of group A and group B on double leg lowering test (DLLT), it shows significant decrease in the post test mean values but (group B- Pilates exercise) shows (30.60) which has the lower mean value is more effective than (group A- Swiss ball exercise) (46.80) at P ? 0.001. Hence, null hypothesis is rejected. Conclusion: The study concluded that both the group was effective but while comparing Pilates exercise showed the potential treatment option than swiss ball exercise. Hence, Pilates exercise was effective on core muscle strengthening in college cricketers. Keywords: Swiss ball; Pilates mat; core muscle; sphygmomanometer.

Plantar Hyperhidrosis: The Efficacy of Iontophoresis with Tap water, Glycopyrronium Bromide and Indomethacin

2021 ◽  
Vol 11 (5) ◽  
Author(s):  
Senthilnathan Prof.Dr.C.V. ◽  
Vaishnavi G. ◽  
Keerthana G. ◽  
NandhaKumar S. ◽  
Kotteeswaran Prof.Dr.
Keyword(s):  
Tap Water ◽  
Psychological Trauma ◽  
Mean Value ◽  
The Body ◽  
Negative Ion ◽  
Unknown Etiology ◽  
Mean Values ◽  
Glycopyrronium Bromide ◽  
Group A ◽  
Group B

Hyperhidrosis is an excessive production of sweat more than the physiological amount necessary to maintain thermal homeostasis. Primary focal hyperhidrosis is a disorder of unknown etiology, causing excessive, bilateral, symmetrical sweating on the soles of the foot is called plantar hyperhidrosis. The condition results not only in physical impairment, but also interferes with professional and social life. Although not life-threatening, it is very uncomfortable and cause embarrassment and psychological trauma. Iontophoresis is a helpful method, which includes the presentation of particles into the body tissue through the skin. The essential principle is to place the ion particles under an electrode with the same charge, i.e. negative ion placed under cathode and positive ion placed under anode. This complete process is also known as “technique of ion transfer” into the body tissues by using electrical current as a driving force. It is a comparative study with pre and post intervention. 30 subjects with plantar hyperhidrosis were selected based on the inclusion criteria. The study duration was for about 4 weeks30 subjects of age group between 15 – 25 years with idiopathic plantar hyperhidrosis of both male and female subjects were included in this study. Subjects with cardiac and respiratory disorders, pregnant or lactating, any cuts, abrasions, eczema or infections on plantar aspect, metal implants like pacemakers, Hypersensitivity to the active substance were excluded. The subjects were divided into 3 group Group A treated with iontophoresis using tap water alone. Group B were treated with iontophoresis using tap water along with 3%-5% of anticholinergic drug, glycopyrronium bromide solution. Group C were treated with iontophoresis using tap water along with 1% of indomethacin (NSAID). The result of this study shows that there were significant changes in outcome measures. On comparing Mean values of Group A, Group B & Group C on Minor test (Starch - Iodine Test) tap Water along with Glycopyrronium Bromide (Group B) shows 1.60 which has the Lower Mean value is effective than Group A and Group C .On comparing Mean values of Group A, Group B & Group C on Visual Analog Scale score tap Water along with Glycopyrronium Bromide (Group B) shows 3.80 which has the Lower Mean value is effective than Group A and Group C. On comparing Mean values of Group A, Group B & Group C on Hyperhidrosis Disease Severity Scale tap Water along with Glycopyrronium Bromide (Group B) shows 1.40 which has the Lower Mean value is effective than Group A and Group C. On comparing all the three groups, Group B shows better result than Group C and Group A in outcome measure. This study concluded that Tap water along with glycopyrronium bromide reduces the excessive sweating and decrease the sweating symptoms in subjects with plantar hyperhidrosis.

The Effect of Gongronema Latifolum (Utazi) on Some Haematological Parameters of Rabbit

2020 ◽  
Author(s):  
Obeagu Emmanuel Ifeanyi
Keyword(s):  
Mean Value ◽  
Control Group ◽  
Mean Values ◽  
Platelet Counts ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Differential White Blood Cell ◽  
Group D ◽  
Gongronema Latifolium

The hematological features of Gongronema latifolium, aqueous leaves extract was evaluated using standard methods. After 10 days of consecutive infusions into 9 experimental animals (rabbits). The rabbits were monitored and the following parameters determined; hemoglobin (HB), PCV, Platelet, WBC, Differential White Blood Cell. The Rabbits were grouped into 4, one consisting of control (group A), group B was fed with 0.5 mg/kg, group C with 1.0 mg/kg, and Group D with 1.5mg/kg of the aqueous extract of Gongronemalatifolium. The mean values obtained for hemoglobin estimation for the control group is 5.9 ± 4.1 g/dl, 9.1 ± 2.9 g/dl for group B 10.2 ± 1.8 g/dl for group C and 12.8 ± 0.1 g/dl for group D with no significant increase on the PCV estimation, the mean value for the control (group A) is 17.7 ± 12.3%, 27.3 ± 8.7% for group B, group C (30.6 ± 5.4%) and D (28.4 ± 0.3) show increase that statistically significant (p > 0.01). the platelet counts of group C (600 ± 0 x 109/L) and D(600 ± 0 x 109/L) show significant increase (p > 0.01) when compared with the control (600 ± 00). But the platelet value of group B (550 ± 50 x 109/L) shows no difference. No significant changes were observed in the White Blood Counts of the test groups B (3.5 ± 0.5 x 109/L), C (1.9 + 2.1 x 109/L) and D(3.6 ± 0.4) when compared with the control group (2.9 ± 1.9). The values obtained from the differential White Blood Counts (Neutrophils, Lymphocytes, Eosinophils and Monocytes) were not significant. Therefore, Gongronemalatifolium, when properly taken as a nutritional diet, causes beneficial changes on hemoglobin, packed cell volumes and platelet counts of consumers.

scholarly journals Deformation of the Internal Connection of Narrow Implants after Insertion in Dense Bone: An in Vitro Study

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1833 ◽  
Author(s):  
Rafael Delgado-Ruiz ◽  
Ana Nicolas Silvente ◽  
Georgios Romanos
Keyword(s):  
In Vitro Study ◽  
Surface Damage ◽  
Insertion Torque ◽  
Type Ii ◽  
Before And After ◽  
Post Test ◽  
Group A ◽  
Group B ◽  
Connection Length

Implant connections must resist surgical and prosthetic procedures without deformation. This study evaluated the deformation of different internal connections (IC) of narrow dental implants (NDI) after their insertion in artificial dense bone. Thirty NDI, with different IC geometries, Group A (internal hexagon), Group B (tri-channeled), and Group C (four-channeled), with the same length and similar narrow diameters, were inserted in type II density bone blocks. Drilling protocols for dense bone from each implant manufacturer were followed. The Insertion torque (IT), connection length, vertex angles, and wall deformations were analyzed before and after the insertion of the implants. ANOVA (Analysis of Variance) and Tukey post-test were used for statistical comparisons. IT values were higher for Group A, surface damage, and titanium particles were observed in the IC in all the groups. Angle deformations between 5 and 70 degrees were present in all the groups, and the walls of Group B connection were the most affected by deformations (p < 0.05). Within the limitations of this experiment, it can be concluded that narrow diameter implants will suffer deformation of the implant connection and will also experience surface damage and titanium particle release when inserted in type II bone density.

Urinary excretion of glycated protein determined with a specific radioimmunoassay

1991 ◽  
Vol 37 (4) ◽  
pp. 504-507 ◽  
Author(s):  
Chizuko Ukita ◽  
Mitsushige Nishikawa ◽  
Akira Shouzu ◽  
Mitsuo Inada
Keyword(s):  
Urinary Excretion ◽  
Normal Subjects ◽  
Mean Values ◽  
Specific Radioimmunoassay ◽  
Glycated Protein ◽  
Highly Sensitive ◽  
Significant Difference ◽  
Group A ◽  
The Mean ◽  
Group B

Abstract We developed a simple and highly sensitive RIA for glycated protein (GP), and used it to measure GP in serum and urine from 15 normal controls and 30 diabetics (14 with urinary excretion rate of albumin, Ualb less than 15 micrograms/min, group A; nine with 15 less than or equal to Ualb less than or equal to 150 micrograms/min, group B; and seven with Ualb greater than 150 micrograms/min, group C). The mean serum concentration of GP was above normal in all groups of diabetics, and the mean glycation ratios of serum protein (SGP) were higher in groups B and C than in normal subjects. Urinary concentrations of GP also were increased in groups B and C, although the glycation ratio of urinary protein (UGP) was decreased in group C. Consequently, the selectivity of urinary excretion of GP (UGP/SGP) was significantly decreased in group C. Moreover, there was a significant difference in the mean values of selectivity between groups of patients with various degrees of retinopathy. We suggest that measurements of serum and urinary GP are useful to evaluate the progression of diabetic complications.

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