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Ridge alterations post-extraction in the esthetic zone: a 3D analysis with CBCT.

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  • 2013-10-26
Published in:
  • Journal of dental research. - 2013
bone remodeling
bone resorption
clinical trial
dental implants
maxilla
three-dimensional imaging
Adult
Aged
Alveolar Bone Loss
Alveolar Process
Anatomic Landmarks
Bone Resorption
Collagen
Cone-Beam Computed Tomography
Cuspid
Esthetics, Dental
Female
Follow-Up Studies
Humans
Imaging, Three-Dimensional
Incisor
Male
Middle Aged
Phenotype
Prospective Studies
Radiography, Dental, Digital
Tooth Extraction
Tooth Socket
Young Adult
English Dimensional alterations of the facial bone wall following tooth extractions in the esthetic zone have a profound effect on treatment outcomes. This prospective study in 39 patients is the first to investigate three-dimensional (3D) alterations of facial bone in the esthetic zone during the initial 8 wks following flapless tooth extraction. A novel 3D analysis was carried out, based on 2 consecutive cone beam computed tomographies (CBCTs). A risk zone for significant bone resorption was identified in central areas, whereas proximal areas yielded only minor changes. Correlation analysis identified a facial bone wall thickness of ≤ 1 mm as a critical factor associated with the extent of bone resorption. Thin-wall phenotypes displayed pronounced vertical bone resorption, with a median bone loss of 7.5 mm, as compared with thick-wall phenotypes, which decreased by only 1.1 mm. For the first time, 3D analysis has allowed for documentation of dimensional alterations of the facial bone wall in the esthetic zone of humans following extraction. It also characterized a risk zone prone to pronounced bone resorption in thin-wall phenotypes. Vertical bone loss was 3.5 times more severe than findings reported in the existing literature.
Language
  • English
Open access status
green
Identifiers
Persistent URL
https://sonar.ch/global/documents/217517
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