Screw joint stability after the application of retorque in implant-supported dentures under simulated masticatory conditions

Farina, Ana Paula; Spazzin, Aloísio Oro; Mesquita, Marcelo Ferraz

doi:10.1016/j.prosdent.2013.07.024

Cited by 52 publications

(61 citation statements)

References 20 publications

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“…The current study showed the maintained torque was lower than the tightening torque for the screws in all groups, which is in agreement with previous studies 3,5,[6][7][8] . This likely occurs due to the phenomenon known as "settling" or "embedment relaxation" 3 .…”

Section: Discussionsupporting

confidence: 93%

“…The higher torque maintenance found for the two holding techniques may be because a longer torque application decreases the irregularities in the threads of the implant and retaining screw, increasing the contact between them during the preload and consequently, decreasing the settling effect. The retorque application after the settling effect may act to regain preload and increase the contact area between the threads; for this reason, several researchers have advocated that retorque application 10 min after the initial application should be performed routinely during abutment-implant connections 3,5,6 . The current study showed that this technique was most effective when associated with holding the torque for 20 s.…”

Section: Discussionmentioning

confidence: 99%

“…Investigators have recommended this procedure as a routine clinical technique 3,5,6 . In addition, holding the torque meter for a longer time period during the tightening torque application on the retaining screw could also decrease the settling effect.…”

Section: Introductionmentioning

confidence: 99%

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Tightening techniques for the retaining screws of universal abutment

Regalin

Alessandretti

Federizzi

et al. 2016

Rev. odontol. UNESP

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ResumoObjetivo: Este estudo avaliou a manutenção do torque de parafusos de retenção do pilar universal utilizando diferentes técnicas de aperto e parafusos com ou sem revestimento. Material e método: Os parafusos foram apertados nos implantes da seguinte forma: Controle -32 Ncm de torque; H20 -segurando os 32 Ncm de torque por 20 s; R -32 Ncm de torque, repetido após 10 min (retorque); e H20+R -combinando as duas técnicas de aperto. Foram também avaliados parafusos de titânio com e sem revestimento da rosca. Resultado: A análise estatística mostrou maior manutenção do torque de parafusos de titânio (p<0,001). A técnica H20+R apresentou a maior manutenção do torque (p=0,003), semelhante a manutenção do torque da técnica H20. Conclusão: Parafusos de titânio combinando as duas técnicas de aperto pode melhorar a manutenção do torque.Descritores: Prótese dentária fixada por implante; conexão implante dentário; torque. AbstractPurpose: This study evaluated the torque maintenance of universal abutment retaining screws using different tightening techniques, and coated or uncoated screws. Material and method: The screws were tightened to implants as following: Control -32 Ncm torque; H20 -holding 32 Ncm torque for 20 s; R -32 Ncm torque, repeated after 10 min (retorque); and H20+R -combining the two tightening techniques. Titanium and coated screws were also evaluated. Result: Statistical analysis showed higher maintained torque for titanium screws (p<0.001). The H20+R technique showed the highest maintained torque (p=0.003), but the H20 technique's maintained torque was similar. Conclusion: Titanium screws associating the two tightening techniques can improve maintained torque.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Tightening techniques for the retaining screws of universal abutment

Regalin

Alessandretti

Federizzi

et al. 2016

Rev. odontol. UNESP

Self Cite

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show abstract

“…[12][13][14] Secondary torque application has also been found to increase joint stability, even when a purposeful misfit between items is present. 15 Handheld screwdrivers have been shown to produce inconsistent torque values on implant screws and abutments. 16 Not all abutment screw types can be successfully tightened by hand.…”

Section: Discussionmentioning

confidence: 99%