Is the internal connection more efficient than external connection in mechanical, biological, and esthetical point of views? A systematic review

Goiato, Marcelo Coelho; Pellizzer, Eduardo Piza; Silva, Emily Vivianne Freitas da; Bonatto, Liliane da Rocha

doi:10.1007/s10006-015-0494-5

Cited by 62 publications

(65 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…15,28,29 These rate between the two types of connection studied here was found clinically. 30 It appears that the size of the micro-gap does not relate to crestal bone loss either. 18 A systematic review found that no dental implant systems could completely seal the implant-abutment interface.…”

Section: Evaluation Based On Micro-ct Imagesmentioning

confidence: 96%

Contact analysis of gap formation at dental implant‐abutment interface under oblique loading: A numerical‐experimental study

Fok

Aparicio

et al. 2019

Clin Implant Dent Rel Res

View full text Add to dashboard Cite

Purpose: To develop numerical and experimental methods for investigating the formation of micro-gaps and the change in contact area at the implant-abutment interface of two different connector designs under oblique cyclic loading.Materials and Methods: Samples (n = 10 per group) of two-piece implant systems with the conical connection (group A) and the external hexagonal connection (group B) were subjected to cyclic loading with increasing load amplitudes up to 220 N.After loading, the samples were scanned using micro-CT, with silver nitrate as a highcontrast penetrant, and the level of leakage was assessed using a discrete scoring system. Three-dimensional finite element (FE) analyses of the two implant systems were also conducted to reveal the micro-gap formation process, especially bridging of the internal abutment screw space. The experimental and numerical results for the bridging load were then compared.Results: 90% of the samples in group A showed leakage into the internal implant space at a load of around 100 N; while over 80% of those in group B did so at a load of around 40 N. This agreed with the FE analysis, which showed bridging of the internal implant space at loads similar to those measured for the two implant systems.Residual gaps of less than 1.49 μm were predicted for group A only after unloading. Conclusions:The FE-predicted loads for bridging agreed well with those found experimentally for leakage to occur. The conical connection showed more resistance against formation of micro-gaps at the implant-abutment interface than the external hexagonal connection. Although the minimum load required to bridge the internal implant space was within the range of human biting force, the relation between bacterial invasion and micro-gaps needs further research. K E Y W O R D S finite element analysis, implant connection design, implant-abutment micro-gap, microcomputed tomography

show abstract

Section: Evaluation Based On Micro-ct Imagesmentioning

confidence: 96%

Contact analysis of gap formation at dental implant‐abutment interface under oblique loading: A numerical‐experimental study

Fok

Aparicio

et al. 2019

Clin Implant Dent Rel Res

View full text Add to dashboard Cite

show abstract

“…Os resultados mostraram uma conexão Morse estável e com uma adaptação uniforme e constante, o que por si só é capaz de minimizar a contaminação do conjunto pilar/ implante, desta maneira diminuindo a perda óssea periimplantar e mantendo os tecidos moles adjacentes saudáveis (DERCOLE, 2014;GOIATO, 2015).…”

Section: Resultsunclassified

Avaliação da adaptação e resistência à remoção de pilar impactado em implante dentário cone Morse de pequeno diâmetro

Nigro¹,

Aranha²,

Mucsi³

et al. 2016

Blucher Physics Proceedings

View full text Add to dashboard Cite

“…Glycoproteins, water and biofilms act as lubricant biological materials decreasing the friction on the titanium surfaces and causing micromovements of the implant‐abutment components . Bacterial microleakage can occur in any implant connection, although MT connections generally provide a better fit compared to external hexagon connections …”

Section: Dental Implant Connectionsmentioning

confidence: 99%

“…That also increases the contact pressure and frictional resistance, enhancing the mechanical stability of the implant‐abutment connection . MT connections can maximize the inner contacting implant‐abutment area and subsequent friction, thus increasing the preload …”

Section: Distribution Of Stresses At Dental Implant Connectionsmentioning

confidence: 99%

Synergistic interactions between corrosion and wear at titanium‐based dental implant connections: A scoping review

Apaza‐Bedoya

Tarce

Benfatti

et al. 2017

J of Periodontal Research

106

View full text Add to dashboard Cite

Two-piece implant systems are mainly used in oral implantology involving an osseointegrated implant connected to an abutment, which supports prosthetic structures. It is well documented that the presence of microgaps, biofilms and oral fluids at the implant-abutment connection can cause mechanical and biological complications. The aim of this review paper was to report the degradation at the implant-abutment connection by wear and corrosion processes taking place in the oral cavity. Most of the retrieved studies evaluated the wear and corrosion (tribocorrosion) of titanium-based materials used for implants and abutments in artificial saliva. Electrochemical and wear tests together with microscopic techniques were applied to validate the tribocorrosion behavior of the surfaces. A few studies inspected the wear on the inner surfaces of the implant connection as a result of fatigue or removal of abutments. The studies reported increased microgaps after fatigue tests. In addition, data suggest that micromovements occurring at the contacting surfaces can increase the wear of the inner surfaces of the connection. Biofilms and/or glycoproteins act as lubricants, although they can also amplify the corrosion of the surfaces. Consequently, loosening of the implant-abutment connection can take place during mastication. In addition, wear and corrosion debris such as ions and micro- and nanoparticles released into the surrounding tissues can stimulate peri-implant inflammation that can lead to pathologic bone resorption.

show abstract

Is the internal connection more efficient than external connection in mechanical, biological, and esthetical point of views? A systematic review

Cited by 62 publications

References 47 publications

Contact analysis of gap formation at dental implant‐abutment interface under oblique loading: A numerical‐experimental study

Contact analysis of gap formation at dental implant‐abutment interface under oblique loading: A numerical‐experimental study

Avaliação da adaptação e resistência à remoção de pilar impactado em implante dentário cone Morse de pequeno diâmetro

Synergistic interactions between corrosion and wear at titanium‐based dental implant connections: A scoping review

Contact Info

Product

Resources

About