Comparative study of abutment screw loosening with or without adhesive material

Arshad, Mahnaz; Shirani, Gholamreza; Refoua, Sina; Yeganeh, Mohammadreza Rahimi

doi:10.4047/jap.2017.9.2.99

Cited by 6 publications

(17 citation statements)

References 8 publications

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“…Finally, the removal torque values were recorded. (16) The values of maximum deformation force and fracture resistance were recorded as well. Data were analyzed by Student's t-test using SPSS software (version 21.0, SPSS Inc., Chicago, IL, USA).…”

Section: Methodsmentioning

confidence: 99%

Comparison of the Effect of Two Different Abutment Diameters on Detorque Value Using Cyclic Loading and Thermocycling

Jalalian

Banifatemeh

Zarbakhsh

et al. 2019

J Res Dentomaxillofac Sci

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Background and Aim: Screw loosening is a common problem with both screw-retained and cemented implant restorations. It is assumed that the abutment diameter affects detorque value and screw loosening. We aimed to determine the effect of two different abutment diameters on detorque value using cyclic loading and thermocycling. Materials and Methods: This in-vitro experimental study was conducted on sixteen Morse-taper implants (4×10 mm) with two different diameters (3.9 and 5.2 mm) installed with a 25-Ncm torque (n=8). Eight screws from each group (3.9-and 5.2-mm abutments) were maintained for a month in a stable state while the rest of the screws underwent cyclic loading for 10,000 cycles with the frequency of 1 Hz and force of 75 N/cm. Then, thermocycling was done at 5-55°C. Detorque value was determined using the torque meter used for screw tightening. Removal torque values were recorded. Maximum deformation force and fracture resistance were documented. Data were analyzed according to Student's t-test using SPSS 21.0 software. Result: Detorque values were 18.25±1.91 and 21.13±1.46 Ncm with 3.9-and 5.2-mm abutments, respectively. Detorque loss value was 15.50±5.83% with 5.2-mm abutment and 27±7.63% with 3.9-mm abutment. The mean difference between the two abutment diameters was 2.87±0.85 Ncm. Significant differences were observed on torque loss with 3.9-mm-compared to 5.2-mm-diameter abutments (P=0.004). Conclusion:The results suggested that torque loss was lower with 5.2-mm abutment diameter.

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Section: Methodsmentioning

confidence: 99%

Comparison of the Effect of Two Different Abutment Diameters on Detorque Value Using Cyclic Loading and Thermocycling

Jalalian

Banifatemeh

Zarbakhsh

et al. 2019

J Res Dentomaxillofac Sci

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“…The adhesive material can fill the space that exists in the abutment-implant junction surface in all of the commercial screw-retained implant systems. Considering what has been written in the article, using an adhesive material can reduce the micro leakage in the abutment-implant interface not only by filling the gap that exists in that interface, but also by improving the retention of the screw-retained abutments [33].…”

Section: Conicalmentioning

confidence: 99%

The Impact of Implant–Abutment Connection on Clinical Outcomes and Microbial Colonization: A Narrative Review

et al. 2020

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Introduction: Osseointegration are often suffering from oral conditions, especially, the micro gap at the implant–abutment connection represents a site for bacterial plaque aggregation, leading to increased inflammatory cells and causing peri-implantitis. Aim: The aim of this narrative review was to describe the different kinds of implant–abutment connections and their ability to reduce bacterial leakage and thus prevent peri-implantitis. Materials and methods: The following databases were consulted: Pubmed, Scopus, Cochrane Library, and Research gate and a total of 528 articles were found. After reading the abstract and titles, 473 items were excluded. The remaining articles (n = 55) were assessed for full-text eligibility. Thirty-three studies were included in the review. Results and Conclusions: We selected 22 clinical trials and 11 reviews, examining a total sample of 2110 implants. From the review, it was clear that there exists a relationship between the implant–abutment interface and bacterial leakage. All the connections presented an amount of micro-gap and bacterial micro-leakage, though conical and mixed connection systems seemed to behave better. Moreover, both connections seemed to have a better load distribution and the mixed system also had anti-rotational properties which are very useful during the positioning of the prosthesis.

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“…Several strategies have been proposed to increase the preload and prevent screw loosening, such as the use of anti-rotation inlay in the screw access hole [14], creation of a bar for mechanical retention of the screw in the screw hole [15], or mechanical alterations of the screw access hole [16]. Our group has previously showed that the application of an industrial adhesive material around the screw of the abutments can significantly increase the removal torque value and reduce screw loosening [17]. However, the adhesive that was used in the previous study was an industrial adhesive with limited biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Comparative study of abutment screw loosening with or without adhesive material

Cited by 6 publications

References 8 publications

Comparison of the Effect of Two Different Abutment Diameters on Detorque Value Using Cyclic Loading and Thermocycling

Comparison of the Effect of Two Different Abutment Diameters on Detorque Value Using Cyclic Loading and Thermocycling

The Impact of Implant–Abutment Connection on Clinical Outcomes and Microbial Colonization: A Narrative Review

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

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