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Immediate implant placement in the anterior mandible: a cone beam computed tomography study
Malmö University, Faculty of Odontology (OD).
Malmö University, Faculty of Odontology (OD).
Slice Diagnost Volumetr Imagem, Belo Horizonte, Brazil..
Malmö University, Faculty of Odontology (OD).ORCID iD: 0000-0002-3460-3374
2024 (English)In: BMC Oral Health, E-ISSN 1472-6831, Vol. 24, no 1, article id 393Article in journal (Refereed) Published
Abstract [en]

Background: The placement of implants into the alveolar socket right after tooth extraction is called immediate implant placement (IIP). This approach has its particularities depending on which region of the jaws is involved. The anterior mandible region is peculiar due to the presence of mandibular incisors, which have the shortest roots among all permanent teeth.

Purpose: This study aimed to investigate the factors that could be associated with the risk of either cortical bone wall perforation or invasion of the 2 mm secure distance from the surrounding anatomical structures (defined as unsafe implant placement), with IIP in the maxillary aesthetic zone, in a cone-beam computed tomography (CBCT) virtual study.

Materials and methods: CBCT exams from 239 eligible subjects were investigated. Implants were virtually placed in two distinct positions: prosthetically-driven (along the long axis of the existing tooth) and bone-driven position (according to the available bone and with regard to nearby anatomical structures). Correlation between several variables was tested, and binary logistic regression analysis in order to assess of the possible associations between covariates and unsafe placement was performed.

Results: Safe placing implants was significantly higher for the bone-driven in comparison to the prosthetically-driven position (22.2% vs. 3.3%, respectively), and the 2-mm secure distance from anatomical structures was not possible to respect in the majority of cases (77.6% vs. 82.9%, respectively). Covariates associated with a higher risk of unsafe placement were tooth region (CI in relation to IL and CA), decrease of labial concavity angle (LCA), decrease of mandible basal bone height (MBBH), and decrease in mandibular bone thickness at the tooth apex level (MBT0).

Conclusion: The possibility of safely placing immediate implants in the anterior mandible is significantly higher for bone-driven than in prosthetically driven position. Presurgical virtual planning with CBCT is a great tool for minimizing the risk of implant unsafe placement with regards to the anatomical conditions in the mandible.

Place, publisher, year, edition, pages
BioMed Central (BMC), 2024. Vol. 24, no 1, article id 393
Keywords [en]
Dental implants, Immediate implant placement, Cone beam computed tomography, Virtual planning, Anterior mandible.
National Category
Dentistry
Identifiers
URN: urn:nbn:se:mau:diva-66866DOI: 10.1186/s12903-024-04111-1ISI: 001195487700002PubMedID: 38539122Scopus ID: 2-s2.0-85188918002OAI: oai:DiVA.org:mau-66866DiVA, id: diva2:1853713
Available from: 2024-04-23 Created: 2024-04-23 Last updated: 2024-07-04Bibliographically approved

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Chrcanovic, Bruno Ramos

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