Virtual quad zygoma implant placement using cone beam computed tomography: sufficiency of malar bone volume, intraosseous implant length, and relationship to the sinus according to the degree of alveolar bone atrophy

The objective of this study was to investigate the malar bone volume and length that a zygomatic implant can engage, and the relationship to the sinus according to the degree of alveolar bone atrophy. A three-dimensional evaluation was performed using cone beam computed tomography scans from 23 pati...

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Bibliographic Details
Published in:International journal of oral and maxillofacial surgery 2018-02, Vol.47 (2), p.252-261
Main Authors: Bertos Quílez, J., Guijarro-Martínez, R., Aboul-Hosn Centenero, S., Hernández-Alfaro, F.
Format: Article
Language:English
Subjects:
Alveolar Bone Loss - diagnostic imaging
Alveolar Bone Loss - surgery
Cone-Beam Computed Tomography
Dental Implantation, Endosseous - methods
Dental Implants
Dentistry
Humans
Imaging, Three-Dimensional
Jaw, Edentulous - diagnostic imaging
Jaw, Edentulous - rehabilitation
malar bone volume engaged
Maxilla - diagnostic imaging
Maxilla - surgery
Software
Surgery, Computer-Assisted
Treatment Outcome
Zygoma - diagnostic imaging
Zygoma - surgery
zygoma implant
zygoma implant path
zygoma implant relationship to the sinus
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Summary:The objective of this study was to investigate the malar bone volume and length that a zygomatic implant can engage, and the relationship to the sinus according to the degree of alveolar bone atrophy. A three-dimensional evaluation was performed using cone beam computed tomography scans from 23 patients with a totally edentulous maxilla; quad zygoma implants were virtually placed. The predictor variable was the amount of malar bone volume and length that a zygomatic implant can engage. The primary outcome variable was the relationship to the sinus according to the degree of alveolar bone atrophy. Other variables were the residual alveolar bone height to the floor of the sinus and the nasal cavity. The mean volume of malar bone engaged in this sample of 92 zygomatic implants was 0.19±0.06cm3. The implant had an extrasinus path in 60.9% of cases, a parasinus path in 25%, and an intrasinus path in 14.1%. The results suggest that the average volume of malar bone engaged by a zygomatic implant is constant regardless of implant position and the degree of alveolar bone atrophy. As alveolar atrophy increases, the trajectory of the implant becomes more parasinus and intrasinus. The examiners were able to find enough bone to adequately distribute the implants in all cases.
ISSN:0901-5027
1399-0020
DOI:10.1016/j.ijom.2017.07.004