The Journal of Advanced Prosthodontics

  • 제13권1호
  • /
  • Pages.65-70
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  • 2021
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Effect of fluid contamination on reverse torque values in implant-abutment connections under oral conditions

  • Mostafavi, Azam Sadat (Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences) ;
  • Memarian, Maryam (Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences) ;
  • Seddigh, Mohammad Ali (Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences)
  • 투고 : 2020.09.15
  • 심사 : 2020.12.30
  • 발행 : 2021.02.26
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초록

Purpose. Implant mechanical complications, including screw loosening, can influence dental implant success. It has been shown that torque values are affected by contamination occurred in implant-abutment (I/A) interface. This study aimed to examine the effects of blood, saliva, fluoride and chlorhexidine contamination on reverse torque values (RTVs) of abutment screws in oral conditions. Materials and Methods. 50 fixtures were mounted into the stainless-steel holders and divided into five groups (n = 10). Except control group (NC), fixture screw holes in other groups were contaminated with chlorhexidine (CG), saliva (SG), blood (BG), or fluoride (FG). Abutment screws were tightened with a digital torque meter. I/A assemblies were subjected to thermocycling and cyclic loading. The mean RTVs were recorded and data were analyzed with one-way ANOVA and Tukey test. Results. Except for specimens in SG (20.56 ± 1.33), other specimens in BG (21.11 ± 1.54), CG (22.89 ± 1.1) and FG (24.00 ± 1.12) displayed significantly higher RTVs compared to NC (19.00 ± 1.87). The highest RTVs were detected in CG and FG. Conclusion. The obtained data robustly suggest that RTVs were significantly affected by fluid contaminations. Specimens in FG and CG displayed the highest RTVs. Therefore, clinicians should have enough knowledge about probable contaminations in I/A interface in order to manage them during clinical procedure and to inform patients about using oral care products.

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참고문헌

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