Influence of repeated screw tightening on bacterial leakage along the implant–abutment interface

Nascimento, Cássio do; Pedrazzi, Vinícius; Miani, Paola Kirsten; Moreira, Larissa Daher; Albuquerque, Rubens Ferreira de

doi:10.1111/j.1600-0501.2009.01769.x

Cited by 50 publications

(55 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Accumulation of bacteria at this interface 11,12 can be associated with peri-implant mucositis, which is defined clinically as erythema and edema of the soft tissue with bleeding on probing as an important feature.…”

mentioning

confidence: 99%

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Türkyilmaz¹,

Black²,

Chong³

2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

Aim:The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. Materials and methods:A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm. Microleakage was quantified by enumerating the bacteria from the colony-forming units. An analysis of variance for the estimates of bacteria enumerated and microgaps was used with a post hoc analysis as indicated. A p-value of 0.05 was used as the level of significance.Results: There was no statistically significant difference in microleakage among the four test groups; there were no significant effects of screw torque or abutment type on the bacteria enumerated. There was a significantly smaller mean microgap with the zirconia abutments. Evaluation of the Sealing Conclusion:The results of this study indicated no statistically significant difference in the sealing capabilities between titanium and zirconia abutments, having internal conical connections, after increasing the abutment screw torque.Clinical significance: It is important for clinicians to follow the guidelines suggested by the implant companies to avoid biomechanical complications over time.

show abstract

mentioning

confidence: 99%

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Türkyilmaz¹,

Black²,

Chong³

2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

show abstract

“…Precaution involving the concentration of bacterial suspensions is already a reality; 4,5,14 but confirmation of bacterial viability was made only in two studies 5,14 . The chosen post-inoculation control test was immersion of the implants up to the I-A interface coating for 30 s. The overflow control by immersion was used in a previous study and showed good results 9 . Currently, in vitro tests for microleakage with corpuscular bacteria showed no flow at the I-A interface, even in hexagonal joints, contradicting what was previously thought 9,14 .…”

Section: Discussionmentioning

confidence: 99%

“…The chosen post-inoculation control test was immersion of the implants up to the I-A interface coating for 30 s. The overflow control by immersion was used in a previous study and showed good results 9 . Currently, in vitro tests for microleakage with corpuscular bacteria showed no flow at the I-A interface, even in hexagonal joints, contradicting what was previously thought 9,14 . Even though these findings may be different in situations of mechanical load, inner joints are more stable and could be more beneficial, but few studies compared this situation 3,13 .…”

Section: Discussionmentioning

confidence: 99%

“…Two-piece implants have a microgap depending on the interface type or system, but presence of fluid flow at this interface and its relationships are very variable [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . This has been correlated to the presence of bacterial infiltration and inflammatory cells that may lead to bone loss around this area 19 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bacterial microleakage at the implant-abutment interface in Morse taper implants

Silva-Neto¹,

Majadas²,

Prudente³

et al. 2014

Braz. J. Oral Sci.

View full text Add to dashboard Cite

Aim: To evaluate the microleakage at the implant-abutment (I-A) interface of Morse tapered implants inoculated with different volumes of bacterial suspension. Methods: Morse tapered I-A sets were selected and divided in two groups depending on the type of abutment: passing screw (PS) and solid (S), and then subdivided into four subgroups (n=6) according to the suspension volume: PS1: 0.1 µL; PS3: 0.3 µL; PS5: 0.5 µL; PS7: 0.7 µL; S1: 0.1 µL; S3: 0.3 µL; S5: 0.5 µL and S7: 0.7 µL. A control test was performed to verify the presence of external contamination during the inoculation and the implants were incubated for microbiological analysis. The microleakage was evaluated every 24 h for 7 days by the clarity of solution. After this period, the implants were disassembled for confirmation of bacterial viability. Results: All the specimens with 0.7 µL and one sample of S5 presented turbidity in the control test indicating external contamination, and were excluded from the study. After 7 days of observation, none of the specimens presented positive results for microleakage and the bacterial viability was confirmed in all specimens. The 0.1 µL and 0.3 µL volumes did not present bacterial microleakage, meaning that these volumes may be inadequate for analysis. Conclusions: None of the sets evaluated showed bacterial microleakage at the I-A interface and the volume of 0.7 µL exceeded the internal capacity of the implants.

show abstract

“…Callan Steinebrunner et al, 2005;Nascimento et al, 2008;Nascimento et al, 2009;Aloise et al, 2010;Cosyn et al, 2011). A maioria dos estudos nesta área têm utilizado métodos tradicionais, como a cultura microbiana, no entanto, estima-se que grande parte das espécies de microrganismos presentes na cavidade oral não são cultiváveis pelos métodos convencionais (Arank et al, 1969), como espécies fastidiosas e microrganismos anaeróbios estritos.…”

Section: Colonização Microbiana Associada Aos Implantes Dentáriosunclassified

<i>Overdentures </i>mandibulares retidas por mini-implantes ou implantes convecionais: avaliação da função mastigatória e colonização microbiana

Cunha¹

View full text Add to dashboard Cite

Influence of repeated screw tightening on bacterial leakage along the implant–abutment interface

Abstract: These results suggest that bacterial leakage between implants and abutments occurs even under unloaded conditions and at a higher intensity when the abutment screw is tightened and loosened repeatedly.

Cited by 50 publications

References 15 publications

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Bacterial microleakage at the implant-abutment interface in Morse taper implants

<i>Overdentures </i>mandibulares retidas por mini-implantes ou implantes convecionais: avaliação da função mastigatória e colonização microbiana

Contact Info

Product

Resources

About