An Instrument for the Optimal Guiding of Osseointegrated Dental Implants

2004 ◽  
Vol 30 (4) ◽  
pp. 267-272 ◽  
Author(s):  
Gintaras Juodzbalys ◽  
Aune M. Raustia
Keyword(s):  
Dental Implants ◽  
Senior Author ◽  
Single Stage ◽  
Mean Deviation ◽  
Deviation Angle ◽  
Working Models ◽  
Osseointegrated Implants ◽  
The Mean ◽  
The Difference

Abstract The purpose of this study was to design an instrument for the optimal guiding of osseointegrated implants intraoperatively to achieve parallelism or desired angulations. Seven patients (4 males and 3 females) were enrolled in the investigation. They ranged in age from 44 to 61 years. Using an instrument designed by the senior author that permitted optimal guiding of the osteotomy instruments (33 Osteofix Oy, Oulu, Finland) we placed in these patients, root form, single stage implants. The difference in angulations between the first and the remaining implants was measured using the abutment replicas on the working models. It was found that the mean deviation angle between the first and the adjacent implant replicas was 2.2° (SD = 0.4°). The largest deviation angles were 2.3° (SD = 0.5°) and 3.1° (SD = 0.8°). The study indicated that the instrument had been designed in a functional manner and that all implants in such relationships can be inserted into their desired positions, either parallel to one another or with the desired angle for the planned prostheses.

Osseointegrated Implants: A Comprehensive Review

2021 ◽  
Vol 2 (1) ◽  
pp. 24-30
Author(s):  
Matheus Marquez Cruvinel Santos ◽  
◽  
Flávio Barros da Silva ◽  
Idiberto José Zotarelli-Filho ◽  
Elias Naim Kassis ◽  
...  
Keyword(s):  
Dental Implants ◽  
Pharmacological Action ◽  
World Health Organisation ◽  
World Health ◽  
Density Level ◽  
Mineral Density ◽  
Osseointegrated Implants ◽  
Bone Mineral Density Level ◽  
The Mean ◽  
Normal Women

The most common bone disorder found by implant dentists is osteoporosis, which is a systemic skeletal disorder associated with aging, which is characterized by loss of bone mass, making bones fragile and more susceptible to fractures. The World Health Organisation has defined osteoporosis as a bone mineral density level greater than 2.5 standard deviations below the mean of young normal women. After 60 years of age, a third of the population have this disorder, it occurs twice as often in women than in men. It is estimated that 1.3 million fractures and 133,000 all hip fractures occur every year as a result of osteoporosis. This study aimed to discuss aspects of the pharmacological action of Bisphosphonates (BP) and their influence on the bone tissue when associated with treatment with dental implants. There are several types of treatments that prevent or prevent the progression of osteoporosis. So, BP, such as alendronate, are inhibitors of bone resorption. Act as controlling the development of osteoporosis by increasing the process of bone density and decrease its reabsorption, often acting as supporting the process of osseointegration of dental implants.

scholarly journals Private Practice Pricing in the Birmingham Region

2019 ◽  
Vol 8 (1) ◽  
pp. 34-37
Author(s):  
Anant Bakshi ◽  
Raeesa Khan ◽  
Bilal Ahmed
Keyword(s):  
Dental Implants ◽  
Average Cost ◽  
Dental Treatment ◽  
Dental Procedure ◽  
Dental Procedures ◽  
Dental Intervention ◽  
The Mean ◽  
The Difference ◽  
Mean Cost ◽  
Insight Into

This study was carried out to evaluate the difference in prices for dental treatments carried out privately in general dental practice within the Birmingham area. Ten different practices were chosen at random, which were spread across Birmingham, in order to get a better insight into the differences across the districts. Their prices for pre-determined dental procedures were procured off the practices’ respective websites or through telephoning. The findings of this study have shown a wide variation in prices for each dental procedure, with the greatest variation in prices between practices being £850 for dental implants. The procedures with the lowest average cost were fissure sealants at £23.14. The procedure with the highest average cost was dental implants at £2,261.11. This study also showed that as more dental treatment was required, the mean cost for the dental intervention increased, regardless of the tooth being treated.

THE MAINTENANCE OF A STANDARD OF ELECTROMOTIVE FORCE: NOTES ON STANDARD WESTON CELLS

1930 ◽  
Vol 3 (5) ◽  
pp. 473-489
Author(s):  
A. Norman Shaw ◽  
H. E. Reilley
Keyword(s):  
Electromotive Force ◽  
Essential Feature ◽  
Mean Deviation ◽  
Entire Group ◽  
Standard Cells ◽  
Characteristics Analysis ◽  
A Cell ◽  
The Mean ◽  
The Difference

A detailed procedure for the maintenance of a standard of voltage to within one or two parts in a million is described.In so far as these investigations have proceeded, neutral saturated cells have been found to be superior to acid cells as independent standards for a period of many years, though the latter are preferable for purposes of ordinary precision or shorter periods. The recommended code of procedure is briefly as follows: a number of cells should be constructed according to standard specifications with the new requirements of uniformity of container and speed of preparation, and observations made upon them every few days for a period of three months. The differences in electromotive force (at constant temperature) should be determined between each cell in the group and any one of them chosen arbitrarily as reference cell, and certain new selection and rejection rules applied. In accordance with these rules a cell should be rejected: (a) if its deviation from the mean electromotive force of the group has increased or decreased by 10 microvolts or more during the preceding two weeks; or (b) if it differs in electromotive force from the mean of the group by more than 10 +d microvolts where d is the mean deviation of the cells of the group. If d exceeds 20 microvolts the entire group should be considered untrustworthy. The selected cells should be observed for three additional months, the rejection rules again applied and if a specified proportion survive elimination, the initial reference mean of the laboratory may be established.At intervals of several months additional groups of cells, neutral and acid, should be constructed and exchanges made with laboratories possessing cells of known characteristics. Analysis of the resulting observations determines: (a) the constants in the aging* equation for the reference batch, and (b) the difference between the initial reference mean of the laboratory and the estimated value of the international reference mean.Examples of the analysis of cell observations are given, illustrating the establishment of the initial reference mean, the recapture of this value when the aging coefficients are known, and the preliminary determination of the aging equation for a given group of cells. The use of the aging equation is found to be the essential feature in the attainment of increased precision.A summary of data on standard cells is included.

Tactile Sensibility of Natural Teeth and Osseointegrated Dental Implants to Loading

2015 ◽  
Vol 15 (1) ◽  
pp. 58-62
Author(s):  
Linards Grieznis ◽  
Peteris Apse ◽  
Leons Blumfelds
Keyword(s):  
Dental Implants ◽  
Vertical Axis ◽  
Point Of View ◽  
Endodontically Treated Teeth ◽  
Tactile Sensibility ◽  
Mean Values ◽  
Osseointegrated Implants ◽  
Tactile Threshold ◽  
Natural Teeth ◽  
The Mean

SummaryIntroduction. Dental implant therapy has become a popular method of replacing one or more missing teeth. Osseointegrated dental implants have been studied from histological, microbiologic and biomechanical point of view, but the neurophysiologic integration of the implants and the supported prostheses has received less attention. The sensory mechanism of dental implants is qualitatively different from that of natural teeth. Psychophysiological tests are used to determine the tactile sensibility perceived with the implants and teeth.Aim of the study. The purpose of this study was to compare tactile sensibility of natural teeth and osseointegrated dental implants.Material and methods. Forty-three patients were included in the study. Natural teeth were divided into two groups: non endodontically treated teeth (NETT) and endodontically treated teeth (ETT). Load tests were done by a computer-controlled pressure sensitive device („Power Lab“ Data Acquisition System - model 4/25T, sensor - model MLT003/D; ADInstruments), specially modified for intraoral use. Pushing forces were applied parallel to the vertical axis of teeth and implants. The patient held a signal button which he/she activated as soon as touch was sensed. At this moment the computer registered passive absolute tactile threshold - measured in Newtons. The mean values of passive absolute tactile threshold for natural teeth and dental implants were calculated. Comparison of the mean values was performed by the means of t-test.Results. Passive absolute tactile threshold for osseointegrated dental implants was 2.39 N (SD=1.92), and for teeth - 0.67 N (SD=0.72), for non endodontically treated teeth it was 0.63 N (SD=0.72) and for endodontically treated teeth - 0.73 N (SD=0.69). The differences in mean values were statistically significant (p<0,0001) except for mean values of NETT vs. ETT.Conclusion. This study shows that patients with osseointegrated implants subjectively feel “touch” sensation when greater force is applied compared with natural teeth.

STATISTICS OF THE MEAN DEVIATION METER

1952 ◽  
Vol 30 (4) ◽  
pp. 329-341
Author(s):  
E. S. Keeping ◽  
W. W. Happ
Keyword(s):  
Probability Density ◽  
Similar Type ◽  
Mean Deviation ◽  
Density Functions ◽  
Tank Circuit ◽  
Decay Constants ◽  
The Mean ◽  
The Difference

The mean deviation is evaluated for a number of distributions of a Poisson or similar type, such as arise with counters, scaling circuits, and in particular with the mean deviation meter described by Greenberg and Happ. The mean deviation for some distributions is fairly readily obtainable, but for the charge on a single tank circuit and also for the difference of charges on two tanks with different decay constants it is necessary to obtain the probability density. Exact expressions for these density functions are given, and also approximations from which the mean deviation can be calculated.

scholarly journals The Difference of Marginal Bone Preservation between Dental Implants with Non-Threaded or Micro-Threaded Collar Designs

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1232
Author(s):  
Mazen Almasri
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
P Value ◽  
Marginal Bone Loss ◽  
Significant Difference ◽  
Bone Preservation ◽  
The Mean ◽  
The Difference ◽  
Implant System ◽  
Metal Show

This study analyzes the marginal bone loss (MBL) among dental implants characterized with non-threaded collar design (NT) when compared to the more classic micro-threaded collar design (MC) as such might reflect the future dentogengival esthetics, implant metal show, and mucositis. A total of 112 patients who received 311 implants have been included in the study and analyzed for their postoperative MBL using sequential periapical radiographs. The prevalence of postoperative peri-implant mucositis was recorded as well. The periapical radiographic comparison was performed between the immediate postoperative record and at the 24-month recall visit. Among the 311 implants, 124 (39.9%) had NT implants, and 187 (60.1%) had MC implants. Out of the 112 patients, 37 (44.6%) were females, and 10 (34.5%) were males included in the NT group. In contrast, 46 (55.4%) females and 19 (65.5%) males were in the MC group. The mean age among the two groups was 41.43 ± 15.900 and 46.68 ± 16.070, respectively. In contrast, the mean MBL among the groups were 0.544 ± 0.7129 and 0.061 ± 0.2648, respectively. The change in MBL was not positively correlated with gender (p-value = 0.154) or age (p-value = 0.115) in both groups. However, there was a significant difference (p-value = 0.001, X2 = 62.796, Df = 4) of MBL between the two implant systems themselves. The MBL was higher in people implanted with the NT system when compared to MC. Therefore, the MC implant system can be a better choice for marginal bone preservation, especially in restoring esthetically demanding areas in the mouth.

Effect of a Multiporous Beta–Tricalicum Phosphate on Bone Density Around Dental Implants Inserted Into Fresh Extraction Sockets

2013 ◽  
Vol 39 (3) ◽  
pp. 339-344 ◽  
Author(s):  
Emad Tawfik Daif
Keyword(s):  
Bone Density ◽  
Dental Implants ◽  
Filling Material ◽  
Mean Values ◽  
Density Measurements ◽  
Pure Phase ◽  
Group A ◽  
The Mean ◽  
The Difference ◽  
Group B

The aim of this study was to assess, via multi-slice helical computerized tomography (CT), the influence of the pure-phase multiporous beta–tricalcium phosphate (beta-TCP) on bone density around dental implants inserted into fresh extraction sockets. Twenty-eight patients (18 women and 10 men), indicated for extraction of their lower premolars and insertion of immediate dental implants, were included in this study. They were randomly divided into two equal groups (14 patients each). Group A received immediate dental implants without any filling material around the implants, while in group B, a pure-phase multiporous beta-TCP was gently packed into the bone gaps around the implants. Three and 6 months after loading the implants, a CT, sagittal and coronal, was made to measure the bone density around the implants. The results of the current study have shown that the mean values of the bone density measurements around the implants in group A were 1150 ± 205 (range, 645–1460) at 3 months and 1245 ± 165 (range, 884–1650) at 6 months after loading the implants. In group B, the mean values of the bone density measurements around the implants were 1280 ± 320 (range, 876–1790) and 1490 ± 358 (range, 1061–1965) at 3 and 6 months after loading the implants, respectively. The statistical analysis of the collected data showed a significant increase in the bone density measurements from 3 to 6 months only in group B (P &lt; .05). Also, the difference between group A and B in the bone density measurements around the implants was statistically significant (P &lt; .05) at only 6 months after loading. On the basis of the results presented in this study, it may be possible to mention that the pure-phase multiporous beta-TCP may enhance the bone density when inserted into the bone gaps around immediate dental implants.

Osseointegrated Implants in the Scenario of Osteonecrosis Occurrence with the use of Bisphosphonates: A Descriptive Review of Clinical Studies

2021 ◽  
pp. 27-33
Author(s):  
Fábio Renato Braga Marcato ◽  
Juliana Caroline Ferreira de Gois Marcato ◽  
Idiberto José Zotarelli Filho ◽  
Elias Naim Kassis
Keyword(s):  
Dental Implants ◽  
Pharmacological Action ◽  
World Health ◽  
Density Level ◽  
Mineral Density ◽  
Osseointegrated Implants ◽  
Bone Mineral Density Level ◽  
The Mean ◽  
Normal Women ◽  
Health Organization

The most common bone disorder found by implant dentists is osteoporosis, which is a systemic skeletal disorder associated with aging, which is characterized by loss of bone mass, making bones fragile and more susceptible to fractures. The World Health Organization has defined osteoporosis as a bone mineral density level greater than 2.5 standard deviations below the mean of young normal women. After 60 years of age, a third of the population have this disorder, it occurs twice as often in women than in men. It is estimated that 1.3 million fractures and 133,000 all hip fractures occur every year as a result of osteoporosis. The aim of this study was to discuss aspects of the pharmacological action of Bisphosphonates (BP) and their influence on the bone tissue when associated with treatment with dental implants. There are several types of treatments which prevent or prevent the progression of osteoporosis. So, BP, such as alendronate, are inhibitors of bone resorption. Act as controlling the development of osteoporosis by increasing the process of bone density and decrease its reabsorption, often acting as supporting the process of osseointegration of dental implants.

The Effect of Vocabulary Intervention on Text Comprehension: Who Benefits?

2019 ◽  
Vol 50 (4) ◽  
pp. 562-578 ◽  
Author(s):  
Dawna Duff
Keyword(s):  
Middle School ◽  
Reading Comprehension ◽  
Text Comprehension ◽  
Classroom Instruction ◽  
Vocabulary Instruction ◽  
Clinical Intervention ◽  
Vocabulary Knowledge ◽  
Vocabulary Intervention ◽  
The Mean ◽  
The Difference

Purpose Vocabulary intervention can improve comprehension of texts containing taught words, but it is unclear if all middle school readers get this benefit. This study tests 2 hypotheses about variables that predict response to vocabulary treatment on text comprehension: gains in vocabulary knowledge due to treatment and pretreatment reading comprehension scores. Method Students in Grade 6 ( N = 23) completed a 5-session intervention based on robust vocabulary instruction (RVI). Knowledge of the semantics of taught words was measured pre- and posttreatment. Participants then read 2 matched texts, 1 containing taught words (treated) and 1 not (untreated). Treated texts and taught word lists were counterbalanced across participants. The difference between text comprehension scores in treated and untreated conditions was taken as a measure of the effect of RVI on text comprehension. Results RVI resulted in significant gains in knowledge of taught words ( d RM = 2.26) and text comprehension ( d RM = 0.31). The extent of gains in vocabulary knowledge after vocabulary treatment did not predict the effect of RVI on comprehension of texts. However, untreated reading comprehension scores moderated the effect of the vocabulary treatment on text comprehension: Lower reading comprehension was associated with greater gains in text comprehension. Readers with comprehension scores below the mean experienced large gains in comprehension, but those with average/above average reading comprehension scores did not. Conclusion Vocabulary instruction had a larger effect on text comprehension for readers in Grade 6 who had lower untreated reading comprehension scores. In contrast, the amount that children learned about taught vocabulary did not predict the effect of vocabulary instruction on text comprehension. This has implications for the identification of 6th-grade students who would benefit from classroom instruction or clinical intervention targeting vocabulary knowledge.

Efficacy and Safety of Oral Ivermectin and Topical Permethrin in the Treatment of Scabies

2020 ◽  
Vol 33 (1) ◽  
pp. 41-47
Author(s):  
Mohsena Akhter ◽  
Ishrat Bhuiyan ◽  
Zulfiqer Hossain Khan ◽  
Mahfuza Akhter ◽  
Gulam Kazem Ali Ahmad ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Close Contact ◽  
Randomized Study ◽  
Sarcoptes Scabiei ◽  
Efficacy And Safety ◽  
Common Skin ◽  
Group A ◽  
The Mean ◽  
The Difference ◽  
Group B

Background: Scabies is one of the most common skin diseases in our country. It is caused by the mite Sarcoptes scabiei var hominis, which is an ecto-parasite infesting the epidermis. Scabies is highly contagious. Prevalence is high in congested or densely populated areas. Individuals with close contact with an affected person should be treated with scabicidal which is available in both oral and topical formulations. The only oral but highly effective scabicidal known to date is Ivermectin. Amongst topical preparations, Permethrin 5 % cream is the treatment of choice. Objective: To evaluate the efficacy & safety of oral Ivermectin compared to topical Permethrin in the treatment of scabies. Methodology: This prospective, non-randomized study was conducted at the out-patient department of Dermatology and Venereology of Shaheed Suhrawardy Medical College & Hospital over a period of 6 months, from August 2016 to January 2017. The study population consisted of one hundred patients having scabies, enrolled according to inclusion criteria. They were divided into two groups. group A was subjected to oral Ivermectin and the group B to Permethrin 5% cream. Patients were followed up on day 7 and 14 for assessment of efficacy and safety. Result: The mean scoring with SD in group A (Ivermectin) and group B (Permethrin) were 8.26 ± 2.22 and 7.59 ± 2.01 respectively at the time of observation. The difference between the mean score of the two group is not significant (p=0.117) the mean scoring with SD in group A and group B were 4.54 ± 2.05 and 1.64 ± 1.84 respectively at 7thdays. The difference between the mean score of the two group is significant (p<0.001). The mean scoring with SD in group A and group B were 2.68± 2.35 and .36± 1.10 respectively at 14th day difference between the mean score of the group is significant (p<0.001). Conclusion: Topical application of permethrin 5% cream is more effective and safer than oral Ivermectin in the treatment of scabies. TAJ 2020; 33(1): 41-47

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