Evaluation of implant abutment screw tightening protocols on reverse tightening values: An in vitro study

2020 ◽  
Author(s):  
Abdullah H. Alnasser ◽  
Chandur P.K. Wadhwani ◽  
Todd R. Schoenbaum ◽  
Mathew T. Kattadiyil
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Implant Abutment ◽  
Abutment Screw

scholarly journals Effect of Application of a Bio-Adhesive on the Removal Torque Value and Rotational Misfit at the Implant–Abutment Junction: An In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6832
Author(s):  
Mahnaz Arshad ◽  
Sina Khayat Zadeh ◽  
Mohammad Atai ◽  
Gholamreza Shirani ◽  
Georgios E. Romanos ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Control Group ◽  
Removal Torque ◽  
Cell Vitality ◽  
Implant Abutment ◽  
Measuring Machine ◽  
Adhesive Application ◽  
Abutment Screw

The aim of this study was to assess the effect of application of a recently developed bio-adhesive (Impladhesive) to abutment screw threads on the removal torque value and rotational misfit at the implant–abutment junction. This in vitro study evaluated 20 implant fixtures and 20 straight abutments. Specimens were randomly divided into two groups (n = 10) with/without adhesive application. In the adhesive group, the abutment was dipped in Impladhesive before torquing. In the control group, the abutment was torqued conventionally without adhesive application. The removal torque value was recorded after completion of the cyclic loading of 500,000 cycles with 2 Hz frequency and 75 N load. Rotational misfit was recorded using a video measuring machine. After applying the torque, the change in the bisector angle on the abutment hex was recorded for each implant. The biocompatibility of Impladhesive was evaluated using a MTT cell vitality assay. Normal distribution of data was assessed using the Kolmogorov–Smirnov test. Data were analyzed using a t-test and Pearson’s correlation coefficient The application of Impladhesive at the implant–abutment interface resulted in significantly greater mean removal torque value compared to the control group (p = 0.008). In addition, the mean rotational misfit at the implant–abutment interface was significantly lower in the use of Impladhesive compared to the control group (p = 0.001). In addition, the cell vitality was found to be greater than 80% at all evaluated time points. It can be concluded that the application of Impladhesive on the abutment screw significantly decreased rotational misfit and increased the removal torque value. Future studies are needed to evaluate the efficacy of this bio-adhesive an in vivo setting.

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 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

Implants With Internal Hexagon and Conical Implant-Abutment Connections: An In Vitro Study of the Bacterial Contamination

2014 ◽  
Vol 40 (1) ◽  
pp. 30-34 ◽  
Author(s):  
Simonetta D'Ercole ◽  
Antonio Scarano ◽  
Vittoria Perrotti ◽  
Jorge Mulatinho ◽  
Adriano Piattelli ◽  
...  
Keyword(s):  
Bacterial Contamination ◽  
In Vitro Study ◽  
Vitro Study ◽  
Bacterial Suspension ◽  
Inflammatory Reactions ◽  
Implant Abutment ◽  
Group 2 ◽  
Group 1 ◽  
Internal Connections

Prevention of microbial leakage at the implant-abutment junction is a major challenge for the construction of 2-stage implants in order to minimize inflammatory reactions and to maximize bone stability at the implant neck. The aim of the present in vitro study was an evaluation of the leakage observed over a period of 28 days in Cone Morse taper internal connections and in screwed-abutments connections. In the present study 10 specimens of Cone Morse (Group 1) and 10 of internal hexagon (Group 2) implants were used. The inner parts of 5 implants per group were inoculated with Pseudomonas aeruginosa (PS) suspension and 5 implants per group with Aggregatibacter actinomycetemcomitans (AA). The possible penetration of bacterial suspension into the surrounding solution was determined by the observation of turbidity of the broth. In Group 1, bacterial contamination was found in 3 out of 5 implant-abutment assemblies seeded with the PS and in 2 samples out of 5 in the assemblies seeded with AA, with a total of leaked assemblies in this group of 5 out of 10. In Group 2, bacterial contamination was found in 4 out of 5 implant-abutment assemblies seeded with the PS, and in 4 out of 5 samples seeded with AA, with a total of leaked assemblies of 8 out of 10. The present data confirm the reported high permeability to bacterial leakage of screw-retained abutment connections, and the lower infiltration rates—although not significantly—of Cone Morse taper internal connections.

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