scholarly journals Comparison in Four Different Implant Systems of Mechanical Resistance to Maximal Stress in Prosthetic Screws—An In Vitro Study

2020 ◽  
Vol 8 (4) ◽  
pp. 116
Author(s):  
Pedro Barreiros ◽  
Luís Neves ◽  
Carlos Aroso ◽  
José M. Mendes ◽  
António Sérgio Silva
Keyword(s):  
In Vitro Study ◽  
Mechanical Resistance ◽  
Fracture Force ◽  
Mean Values ◽  
Multiple Comparison Test ◽  
Implant Abutment ◽  
Maximal Stress ◽  
Bone Preservation ◽  
Level Of Significance

Micromovements of the implant–abutment connection influence peri-implant bone preservation. This study evaluates and quantifies the maximal torque after a cycle of implant prosthetic screws tightening using original components. A total of 40 samples were tested: Megagen®—Daegu, South Korea; Dentium®—Gangnam-Gu, Seoul, Korea; BIOMET 3i®—West Palm Beach, FL, USA and BTI®—Álava, Spain. Screws from each manufacturer were subjected to maximal stress force until they fractured. The fracture points were recorded and compared among all samples. To compare the mean values of fracture torques, the reference values associated with each brand and the sample results were used in t-tests. ANOVA (analysis of variance) was used to compare the maximal resistance limit between brands, complemented with Tukey’s multiple-comparison test. The maximal considered level of significance was 5%. The average fracture force for the brands was 40.07 Ncm for Megagen®, 53.39 Ncm for Dentium®, 39.74 Ncm for Biomet 3i®, and 68.84 Ncm for BTI®. BTI® screws showed the most resistance to fracture. According to the protocol that was applied, the implant–abutment connection demonstrated good resistance and a precise fit between these interfaces; therefore, in some cases, the presented values showed a lack of quality control and low fracture resistance.

scholarly journals Comparison of Mechanical Resistance to Maximal Torsion Stress in Original and Nonoriginal or Compatible Prosthetic Implant Screws: An In Vitro Study

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
António Sérgio Silva ◽  
José Manuel Mendes ◽  
Tiago Araújo ◽  
Carlos Aroso ◽  
Pedro Barreiros
Keyword(s):  
Testing Machine ◽  
In Vitro Study ◽  
Fracture Site ◽  
Mechanical Resistance ◽  
Mean Values ◽  
Maximal Torsion ◽  
Significant Difference ◽  
Bone Preservation ◽  
Prosthetic Implant

Micromovements of the implant-abutment connection influence peri-implant bone preservation. The maximal torque after a cycle of implant prosthetic screw tightening using original components of different manufacturers and replicas produced by other companies is evaluated and quantified in this study. A total of 30 Mis Seven® standard platform implants and 30 interfaces were used, and 30 standard platform screws were tested, 10 Mis®, 10 Iconekt®, and 10 Exaktus®. The screws were tightened with an MIS® torquemeter until their respective fracture, and the fracture point was measured through the equipment’s load cell, CS-Dental Testing Machine®. The screws were analyzed under an Olympus® SZ61 microscope. The fracture points were recorded and compared among all samples. To compare the mean values of the fracture torques, t-tests were performed using the reference values associated with each brand and the sample results. The variable “Place of Fracture” between the original Mis® brand and the Exaktus® replica compared to the Iconekt® replica presented a statistically significant difference (p < 0.001). When analyzing the variable “Fracture Torque,” although it was verified that the replica screws (Iconekt® and Exaktus®) had a lower maximum torque, 65.11 Nm and 62.89 Nm, respectively, compared to the original Mis® brand (70 Nm and 69 Nm), there were no statistically significant differences p > 0.05. Nonoriginal screws did not present different fracture resistances compared to the original Mis® brand screws. The fracture site of Iconekt® screws showed a different pattern compared to the other brands.

Effect of Metal Extension of Crown in the Screw Access Channel of a Posterior Implant Abutment on the Retention of Cement Retained Prosthesis

2015 ◽  
Vol 41 (5) ◽  
pp. 537-541 ◽  
Author(s):  
Rashmi Biyani ◽  
Mohsin Ali ◽  
Donald Belles ◽  
John M. Powers
Keyword(s):  
Testing Machine ◽  
In Vitro Study ◽  
Acrylic Resin ◽  
Instron Testing Machine ◽  
Access Channel ◽  
Significant Difference ◽  
Implant Abutment ◽  
Tensile Forces ◽  
Level Of Significance

Purpose: Reducing the height of the implant abutment due to limited interarch space decreases the surface area for retention of cemented restorations. The purpose of this in vitro study was to see whether engaging the screw access channel with metal extension compensates for the loss of retention of posterior crowns cemented on shorter abutments. Material and Methods: Four identical prefabricated abutments were mounted on implant replicas embedded in acrylic resin blocks. Three of these abutments were reduced in height by 1 mm, 2 mm, and 3 mm respectively and one was left unmodified. Two sets of base metal crowns were fabricated for each abutment, one without and one with the metal extension inside the screw access channel. The crowns were cemented using Tempbond NE. The tensile forces required to separate the cemented crowns from abutments were measured using an Instron testing machine. Statistical analysis of the data was performed using a 2-way analysis of variance and Fisher's protected least significant difference at 0.05 level of significance. Results: An increase of 24% to 261% in retentive forces was observed for the group having metal extension in the screw access channel. Statistically significant differences (P &lt; .001) were found among 2 types of crowns and four heights of abutments. Generally, the retentive forces were reduced in magnitude as the abutment height was reduced. Conclusion: The retention of a casting cemented to posterior implant abutments is influenced by the height of the abutment and the metal extension engaging the screw access channel. The crowns made with a metal extension showed superior retention values.

scholarly journals Evaluation of Antimicrobial Efficacy and Permeability of Various Sealing Materials at the Implant–Abutment Interface—A Pilot In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 385
Author(s):  
Igor Smojver ◽  
Marko Vuletić ◽  
Dražena Gerbl ◽  
Ana Budimir ◽  
Mato Sušić ◽  
...  
Keyword(s):  
Fungal Infections ◽  
Aerobic Condition ◽  
In Vitro Study ◽  
Vitro Study ◽  
Antimicrobial Efficacy ◽  
Sealing Material ◽  
Implant Abutment ◽  
Static Conditions ◽  
Sealing Materials

The microenvironment of the oral cavity is altered when an implant, a biocompatible foreign body, is inserted into the mouth. Bacteria settle in the tissues in and around the implant due to the passage of microorganisms through the microgap at the connection of the implant and prosthetic abutment. To prevent colonization of the implant by microorganisms, one idea is to use sealing and antimicrobial materials to decontaminate the implant–abutment interface and close the microgap. The purpose of this study is to evaluate the antimicrobial efficacy and permeability of different types of sealing materials at the implant–abutment interface, under static conditions. Three different sealing material (GapSeal gel, Oxysafe gel and Flow.sil) were used for sealing the implant–abutment interfaces in 60 titanium dental implants, which were first contaminated with a solution containing Staphylococcus aureus and Candida albicans for 14 days under an aerobic condition. Results showed that a complete seal against bacterial infection was not formed at the implant–abutment interface, while for fungal infections, only GapSeal material helped to prevent microleakage. Findings of this in vitro study reported that application of sealing material before abutment connection may reduce peri-implant bacterial and fungal population compared with the interface without sealing material.

The Effect of Tissue Entrapment on Screw Loosening at the Implant/Abutment Interface of External- and Internal-Connection Implants: An In Vitro Study

2015 ◽  
Vol 25 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Helios A. Zeno ◽  
Renan L. Buitrago ◽  
Sidney S. Sternberger ◽  
Marisa E. Patt ◽  
Nick Tovar ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Screw Loosening ◽  
Internal Connection ◽  
Implant Abutment

scholarly journals The Antibacterial Efficacy of Biopure MTAD in Root Canal Contaminated with Enterococcus faecalis

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Blerim Kamberi ◽  
Donika Bajrami ◽  
Miranda Stavileci ◽  
Shuhreta Omeragiq ◽  
Fatmir Dragidella ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Sodium Hypochlorite Solution ◽  
Antibacterial Efficacy ◽  
Human Teeth ◽  
Exact Test ◽  
Hypochlorite Solution ◽  
Root Canals ◽  
Significant Difference ◽  
Level Of Significance

Aim. The purpose of this in vitro study was to assess the antimicrobial efficacy of Biopure MTAD against E. faecalis in contaminated root canals. Materials and Methods. Forty-two single rooted extracted human teeth were inoculated with E. faecalis and incubated for four weeks. The samples were divided in two control and five experimental groups irrigated with 1.5% sodium hypochlorite solution (NaOCl); 3% NaOCl; BioPure MTAD; 1.5% NaOCl/17% EDTA; or 3% NaOCl/17% EDTA. After a one-week incubation, complete disinfection was confirmed by the absence of turbidity in the incubation media. Dentin shavings were taken from samples with no turbidity to verify whether E. faecalis was present in dentin tubules. Results were analyzed statistically using Fisher's exact test, with the level of significance set at . Results. Statistical analysis of the data obtained at Day 7 and after dentin shaving analysis showed that BioPure MTAD had significantly greater antibacterial activity than 1.5% NaOCl, 1.5% NaOCl/17% EDTA and 3% NaOCl/17% EDTA. No significant difference was detected between MTAD and 3% NaOCl. Conclusions. These findings suggest that BioPure MTAD possesses superior bactericidal activity compared with NaOCl and EDTA against E. faecalis.

scholarly journals Association between implant abutment microgap and implant circularity to bacterial leakage - an in vitro study using tapered connection implants

2018 ◽  
Vol 29 ◽  
pp. 294-294
Author(s):  
Eduardo Claudio Lopes de Chaves E. Mello Dias ◽  
Marcelo Sperandio ◽  
Marcelo Henrique Napimoga
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Implant Abutment ◽  
Bacterial Leakage ◽  
Tapered Connection

Comparative In Vitro Study of Implant-Supported Restorations: Implant-Abutment Complex With and Without Prosthetic Finishing Line

2018 ◽  
Vol 33 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Rubén Agustín-Panadero ◽  
Ana Roig-Vanaclocha ◽  
Antonio Fons-Font ◽  
María Solá-Ruíz
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Implant Abutment
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