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Maxillary "All-On-Four" treatment using zygomatic implants. A mechanical analysis

dc.contributor.authorDe Moraes P.H.
dc.contributor.authorOlate S.
dc.contributor.authorDe Arruda Nóbilo M.
dc.contributor.authorAsprino L.
dc.contributor.authorDe Moraes M.
dc.contributor.authorDe Albergaría Barbosa J.
dc.date.accessioned2020-09-02T22:16:11Z
dc.date.available2020-09-02T22:16:11Z
dc.date.issued2016
dc.identifier10.1016/j.revsto.2015.11.009
dc.identifier.citation117, 2, 67-71
dc.identifier.issn22136533
dc.identifier.urihttps://hdl.handle.net/20.500.12728/4228
dc.descriptionObjective. Zygomatic implants may be used for dental rehabilita-tion in atrophic maxillae. The aim of this study was to establish experimentally the areas of stress distribution using 2 kinds of All- On-Four'' maxillary procedures. Study design. The best position to insert the implants was selected using polyurethane craniomaxillary models and surgical guides were made. Group 1 was designed with two posterior zygomatic implants and two conventional anterior implants, and group 2 with two posterior zygomatic implants and two anterior zygomatic implants. A titanium bar was built to link the 4 implants in both groups. Photoelastic replicas of these models were made and the implants were inserted using the surgical guides. An Instrom 4411 testing machine was used to perform a unilateral compressive loading at the level of the right first molar until 2 mm of displace- ment was obtained. Results. Group 1 showed a high strain concentration in the right lateral orbital region at the level of the apex of the zygomatic implant. Less strain was noticed at the apical levels of the conventional implants in the anterior sector and of the contralateral zygomatic implant. Group 2 showed high strains in the lateral inferior orbital area. The load was low in the alveolar bone sector. Discussion. Zygomatic bone and paranasal structures are loaded at high levels when zygomatic implants are used to stabilize a full maxillary prosthodontic rehabilitation on 4 implants. The use of 4 zygomatic implants loads the alveolar bone to a lower extent and seems better suited from a mechanical point of view than the use of 2 zygomatic implants. © 2016 Elsevier Masson SAS.
dc.language.isoen
dc.publisherElsevier Masson SAS
dc.subjectDental implants
dc.subjectMechanical
dc.subjectStress
dc.subjectZygomas
dc.subjectadverse effects
dc.subjectbiomechanics
dc.subjectdevices
dc.subjecthuman
dc.subjectJaw, Edentulous
dc.subjectmaterials testing
dc.subjectmaxilla
dc.subjectmechanical stress
dc.subjectprocedures
dc.subjectprosthesis design
dc.subjecttooth implantation
dc.subjecttooth prosthesis
dc.subjectzygoma
dc.subjectBiomechanical Phenomena
dc.subjectDental Implantation, Endosseous
dc.subjectDental Prosthesis Design
dc.subjectDental Prosthesis, Implant-Supported
dc.subjectHumans
dc.subjectJaw, Edentulous
dc.subjectMaterials Testing
dc.subjectMaxilla
dc.subjectStress, Mechanical
dc.subjectZygoma
dc.titleMaxillary "All-On-Four" treatment using zygomatic implants. A mechanical analysis
dc.typeArticle


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