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Development of a new quantitative gas permeability method for dental implant-abutment connection tightness assessment.

Torres JH, Mechali M, Romieu O, Tramini P, Callas S, Cuisinier FJ, Levallois B - Biomed Eng Online (2011)

Bottom Line: The results show very significant differences between various sealing and screwing conditions.The remaining flow was lower after key screwing compared to hand screwing (p = 0.03) and remained different from the negative test (p = 0.0004).The method reproducibility was very good, with a coefficient of variation of 1.29%.

View Article: PubMed Central - HTML - PubMed

Affiliation: Université Montpellier, France. jh.torres@univ-montp1.fr

ABSTRACT

Background: Most dental implant systems are presently made of two pieces: the implant itself and the abutment. The connection tightness between those two pieces is a key point to prevent bacterial proliferation, tissue inflammation and bone loss. The leak has been previously estimated by microbial, color tracer and endotoxin percolation.

Methods: A new nitrogen flow technique was developed for implant-abutment connection leakage measurement, adapted from a recent, sensitive, reproducible and quantitative method used to assess endodontic sealing.

Results: The results show very significant differences between various sealing and screwing conditions. The remaining flow was lower after key screwing compared to hand screwing (p = 0.03) and remained different from the negative test (p = 0.0004). The method reproducibility was very good, with a coefficient of variation of 1.29%.

Conclusions: Therefore, the presented new gas flow method appears to be a simple and robust method to compare different implant systems. It allows successive measures without disconnecting the abutment from the implant and should in particular be used to assess the behavior of the connection before and after mechanical stress.

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Related in: MedlinePlus

Experimental set-up tightness. Three tests were realized to assess experimental set-up tightness: -blind-ended glass tube; - epoxy: a double-ended opened glass tube sealed on one side with a plug of epoxy glue;- wax: a double-ended opened glass tube sealed on one side with a plug of wax.
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Figure 4: Experimental set-up tightness. Three tests were realized to assess experimental set-up tightness: -blind-ended glass tube; - epoxy: a double-ended opened glass tube sealed on one side with a plug of epoxy glue;- wax: a double-ended opened glass tube sealed on one side with a plug of wax.

Mentions: The negative tests performed proved that the experimental setup and the various materials used to stop nitrogen leaking show convenient gas tightness (Figure 4). The slope of the blind-ended glass tube (0.000252 hPa.sec-1, or e-8.29 hPa.sec-1) gave an idea of the maximal tightness of the experimental setup i.e. the remaining leakage when the system is totally closed. Measures of tightness obtained with the epoxy glue and the blind-ended glass tube were in the same range (e-8.02 and e-7.95 hPa.sec-1 respectively).


Development of a new quantitative gas permeability method for dental implant-abutment connection tightness assessment.

Torres JH, Mechali M, Romieu O, Tramini P, Callas S, Cuisinier FJ, Levallois B - Biomed Eng Online (2011)

Experimental set-up tightness. Three tests were realized to assess experimental set-up tightness: -blind-ended glass tube; - epoxy: a double-ended opened glass tube sealed on one side with a plug of epoxy glue;- wax: a double-ended opened glass tube sealed on one side with a plug of wax.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3094215&req=5

Figure 4: Experimental set-up tightness. Three tests were realized to assess experimental set-up tightness: -blind-ended glass tube; - epoxy: a double-ended opened glass tube sealed on one side with a plug of epoxy glue;- wax: a double-ended opened glass tube sealed on one side with a plug of wax.
Mentions: The negative tests performed proved that the experimental setup and the various materials used to stop nitrogen leaking show convenient gas tightness (Figure 4). The slope of the blind-ended glass tube (0.000252 hPa.sec-1, or e-8.29 hPa.sec-1) gave an idea of the maximal tightness of the experimental setup i.e. the remaining leakage when the system is totally closed. Measures of tightness obtained with the epoxy glue and the blind-ended glass tube were in the same range (e-8.02 and e-7.95 hPa.sec-1 respectively).

Bottom Line: The results show very significant differences between various sealing and screwing conditions.The remaining flow was lower after key screwing compared to hand screwing (p = 0.03) and remained different from the negative test (p = 0.0004).The method reproducibility was very good, with a coefficient of variation of 1.29%.

View Article: PubMed Central - HTML - PubMed

Affiliation: Université Montpellier, France. jh.torres@univ-montp1.fr

ABSTRACT

Background: Most dental implant systems are presently made of two pieces: the implant itself and the abutment. The connection tightness between those two pieces is a key point to prevent bacterial proliferation, tissue inflammation and bone loss. The leak has been previously estimated by microbial, color tracer and endotoxin percolation.

Methods: A new nitrogen flow technique was developed for implant-abutment connection leakage measurement, adapted from a recent, sensitive, reproducible and quantitative method used to assess endodontic sealing.

Results: The results show very significant differences between various sealing and screwing conditions. The remaining flow was lower after key screwing compared to hand screwing (p = 0.03) and remained different from the negative test (p = 0.0004). The method reproducibility was very good, with a coefficient of variation of 1.29%.

Conclusions: Therefore, the presented new gas flow method appears to be a simple and robust method to compare different implant systems. It allows successive measures without disconnecting the abutment from the implant and should in particular be used to assess the behavior of the connection before and after mechanical stress.

Show MeSH
Related in: MedlinePlus