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Distinct structural determinants of failure in morse taper and internal hex implant systems

2026-07-17Artigo de investigação Acesso aberto
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dc.contributor.authorGehrke, Sergio Alexandre
dc.contributor.authorCoura, Gustavo
dc.contributor.authorMello, Bruno Freitas
dc.contributor.authorFormiga, Márcio de Carvalho
dc.contributor.authorScarano, Antonio
dc.contributor.authorFernandes, Juliana Campos Hasse
dc.contributor.authorFernandes, Gustavo Vicentis Oliveira
dc.contributor.authorBuzzi, Fátima de Campos
dc.date.accessioned2026-08-06T15:24:27Z
dc.date.available2026-08-06T15:24:27Z
dc.date.issued2026-07-17
dc.description.abstractObjectives: To evaluate the influence of implant–abutment connection design, implant diameter, and simulated marginal bone loss on fracture resistance and failure patterns of dental implant systems. Materials and Methods: A total of 180 implant–abutment assemblies were tested, including Morse taper (MT) and internal hex (IH) connections with diameters of 3.5, 4.0, and 5.0 mm. Implants were embedded at two simulated bone levels (0 and 3 mm) and loaded at 30° until failure, in accordance with ISO 14801:2015. Fracture resistance (N) was analyzed using three-way ANOVA. Results: Connection type, implant diameter, bone level, and their interactions significantly affected fracture resistance (p < 0.001). Internal hex implants showed a marked diameter-dependent increase in resistance and greater reduction under simulated bone loss, particularly in reduced diameters. In contrast, Morse taper implants demonstrated similar resistance values regardless of implant diameter or bone level. Failure patterns also differed between systems: internal hex implants exhibited cervical implant fractures in reduced diameters, whereas Morse taper implants showed progressive abutment deformation and/or abutment fracture without implant body fracture. Conclusions: Implant fracture resistance is strongly influenced by implant–abutment connection geometry. Within the limitations of this static in vitro study, MT systems demonstrated diameter-independent mechanical stability and prosthetic-controlled failure patterns, whereas IH systems were highly sensitive to diameter reduction and simulated bone loss.eng
dc.identifier.doi10.3390/jfb17070346
dc.identifier.eid105045826690
dc.identifier.other2fa6ecba-41b1-4ce0-9c74-7d68e1981973
dc.identifier.pmcPMC13413259
dc.identifier.pmid42506572
dc.identifier.urihttp://hdl.handle.net/10400.14/59031
dc.identifier.wos001832149800001
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiomechanical testingeng
dc.subjectDental implantseng
dc.subjectFailure modeeng
dc.subjectFracture resistanceeng
dc.subjectImplant diametereng
dc.subjectImplant–abutment connectioneng
dc.subjectInternal hexeng
dc.subjectISO 14801eng
dc.subjectMarginal bone losseng
dc.subjectMorse tapereng
dc.titleDistinct structural determinants of failure in morse taper and internal hex implant systems
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue7
oaire.citation.volume17
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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