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ORIS Criteria of Success for the Zygoma-Related Rehabilitation: The (Revisited) Zygoma Success Code

Journal article
Authors C. Aparicio
R. Lopez-Piriz
Tomas Albrektsson
Published in International Journal of Oral & Maxillofacial Implants
Volume 35
Issue 2
Pages 366-378
ISSN 0882-2786
Publication year 2020
Published at Institute of Clinical Sciences
Pages 366-378
Language en
Links dx.doi.org/10.11607/jomi.7488
Keywords criteria of success, ORIS, review (narrative), ZAGA, zygomatic implants, zygomatic success code, edentulous maxilla, follow-up, prosthetic rehabilitation, immediate, function, implant placement, atrophic maxilla, reconstruction, restoration, outcomes, fixture, Dentistry, Oral Surgery & Medicine
Subject categories Clinical Medicine

Abstract

Zygomatic-related implant rehabilitation differs from traditional implant treatment in biomechanics, clinical procedures, outcomes, and eventual complications such as soft tissue incompetence or recession that may lead to recurrent sinus/soft tissue complications. The extreme maxillary atrophy that indicates the use of zygomatic implants prevents use of conventional criteria to describe implant success/failure. Currently, results and complications of zygomatic implants reported in the literature are inconsistent and lack a standardized systematic review. Moreover, protocols for the rehabilitation of the atrophic maxilla using zygomatic implants have been in continuous evolution. The current zygomatic approach is relatively new, especially if the head of the zygomatic implant is located in an extramaxillary area with interrupted alveolar bone around its perimeter. Specific criteria to describe success/survival of zygomatic implants are necessary, both to write and to read scientific literature related to zygomatic implant-based oral rehabilitations. The aim of this article was to review the criteria of success used for traditional and zygomatic implants and to propose a revisited Zygomatic Success Code describing specific criteria to score the outcome of a rehabilitation anchored on zygomatic implants. The ORIS acronym is used to name four specific criteria to systematically describe the outcome of zygomatic implant rehabilitation: offset measurement as evaluation of prosthetic positioning; rhino-sinus status report based on a comparison of presurgical and postsurgical cone beam computed tomography in addition to a clinical questionnaire; infection permanence as evaluation of soft tissue status; and stability report, accepting as success some mobility until dis-osseointegration signs appear. Based on these criteria, the assessment of five possible conditions when evaluating zygomatic implants is possible.

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