Influence of Abutment Type and Esthetic Veneering on Preload Maintenance of Abutment Screw of Implant‐Supported Crowns

Délben, Juliana Aparecida; Barão, Valentim Adelino Ricardo; Santos, Paulo Henrique dos; Assunção, Wirley Gonçalves

doi:10.1111/jopr.12065

Cited by 12 publications

(16 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Seven articles evaluated the torquing sequence for the maintenance of preload values and found that retorquing after 10 min of initial torque is efficient to maintain the preload value [Table 1]. [16121823273032333743]…”

Section: Torque Sequencementioning

confidence: 99%

Systematic analysis of factors that cause loss of preload in dental implants

Nithyapriya

Kirubakaran

et al. 2018

J Indian Prosthodont Soc

View full text Add to dashboard Cite

show abstract

Section: Torque Sequencementioning

confidence: 99%

Systematic analysis of factors that cause loss of preload in dental implants

Nithyapriya

Kirubakaran

et al. 2018

J Indian Prosthodont Soc

View full text Add to dashboard Cite

show abstract

“…The irregularities generated during manufacturing may be minimized by mechanical cycling, which causes settling, galling, and sometimes desirable adhesive wear between the two mating surfaces of abutment screw and implant. 7 8 10 11 12 13 14 15 …”

Section: Introductionmentioning

confidence: 99%

Effect of abutment screw length and cyclic loading on removal torque in external and internal hex implants

et al. 2016

View full text Add to dashboard Cite

PURPOSEThe purpose of this study was to evaluate the effects of abutment screw length and cyclic loading on the removal torque (RTV) in external hex (EH) and internal hex (IH) implants.MATERIALS AND METHODSForty screw-retained single crowns were connected to external and internal hex implants. The prepared titanium abutment screws were classified into 8 groups based on the number of threads (n = 5 per group): EH 12.5, 6.5, 3.5, 2.5 and IH 6.5, 5, 3.5, 2.5 threads. The abutment screws were tightened with 20 Ncm torque twice with 10-minute intervals. After 5 minutes, the initial RTVs of the abutment screws were measured with a digital torque gauge (MGT12). A customized jig was constructed to apply a load along the implant long axis at the central fossa of the maxillary first molar. The post-loading RTVs were measured after 16,000 cycles of mechanical loading with 50 N at a 1-Hz frequency. Statistical analysis included one-way analysis of variance and paired t-tests.RESULTSThe post-loading RTVs were significantly lower than the initial RTVs in the EH 2.5 thread and IH 2.5 thread groups (P<.05). The initial RTVs exhibited no significant differences among the 8 groups, whereas the post-loading RTVs of the EH 6.5 and EH 3.5 thread groups were higher than those of the IH 3.5 thread group (P<.05).CONCLUSIONWithin the limitations of this study, the external hex implants with short screw lengths were more advantageous than internal hex implants with short screw lengths in torque maintenance after cyclic loading.

show abstract

“…When the slippage accumulates to a certain degree, the remaining preload would be below a critical level. Then, any external force would result in screw loosening …”

Section: Discussionmentioning

confidence: 99%

“…Then, any external force would result in screw loosening. [65][66][67][68] Currently, many studies have improved the stability of abutment by reducing friction through a lubricating coating (Teflon coating) or lubricant (Vaseline) to enhance the preload. 69,70 However, these methods only considered the preload and neglected the friction.…”

Section: Discussionmentioning

confidence: 99%

A thermosensitive chitosan‐based hydrogel for sealing and lubricating purposes in dental implant system

Cao

Cai

Chen

et al. 2019

Clin Implant Dent Rel Res

View full text Add to dashboard Cite

Background Mechanical and biological complications associated with implant systems happen frequently in the clinic. Purpose To develop a chitosan (CS)‐based thermosensitive hydrogel for sealing and lubricating purposes in dental implant system. Materials and Methods In this study, a thermosensitive hydrogel made up of CS, β‐glycerophosphate pentahydrate (β‐GP), and povidone‐iodine (PVP‐I), called CS/β‐GP/PVP‐I thermosensitive hydrogel, was fabricated. Three experimental groups with different volume ratios of CS to β‐GP were prepared, namely 16/4, 13/7, and 10/10 groups. The surface topography of the different groups and their physicochemical characteristics were examined by SEM, FTIR, and X‐ray diffraction analysis. The cytotoxicity of the hydrogel was examined by CCK‐8 test. In vitro antibacterial efficiency was analyzed by the spread plate method. Sealing ability was detected by incubating two‐piece implants in Escherichia coli suspension. Lubricating ability of the hydrogel was evaluated by the removal torque test with a calibrated digital torque meter. Results The CS/β‐GP/PVP‐I thermosensitive hydrogel was fabricated and showed a highly porous structure under SEM. An in vitro cytotoxicity test demonstrated that 13/7 group displayed no cytotoxicity. Furthermore, all three groups showed obviously antibacterial effects. In the sealing ability test, 16/4 group showed the best sealing ability. The removal torque of 16/4 group and 13/7 group was significantly greater than control group. Conclusions Based on our findings, it could be concluded that the thermosensitive and antibacterial CS/β‐GP/PVP‐I hydrogel with sealing and lubricating ability was successfully prepared. The hydrogel had better sealing and lubricating effects when the volume ratio of CS to β‐GP was 16/4.

show abstract

Influence of Abutment Type and Esthetic Veneering on Preload Maintenance of Abutment Screw of Implant‐Supported Crowns

Abstract: Detorque reduction occurred regardless of abutment type and veneering material. More irregular surfaces in the hexagon area of the castable abutments were observed. The superiority of any veneering material concerning preload maintenance was not established.

Cited by 12 publications

References 25 publications

Systematic analysis of factors that cause loss of preload in dental implants

Systematic analysis of factors that cause loss of preload in dental implants

Effect of abutment screw length and cyclic loading on removal torque in external and internal hex implants

A thermosensitive chitosan‐based hydrogel for sealing and lubricating purposes in dental implant system

Contact Info

Product

Resources

About