Presurgical CBCT assessment of maxillary neurovascularization in relation to maxillary sinus augmentation procedures and posterior implant placement.
Surg Radiol Anat
; 36(9): 915-24, 2014 Nov.
Article
em En
| MEDLINE
| ID: mdl-24828124
ABSTRACT
PURPOSE:
To provide more information to clinicians planning sinus grafting and maxillofacial surgical interventions, the present study evaluated the prevalence, diameter and location of the superior alveolar canals (SAC) using CBCT images.METHODS:
The maxillary sinus CBCT scans (i-CAT Classic(®), ISI, USA) of 100 adult patients (67 women and 33 men) aged 20-79 years [mean (SD) 40 (15)] were examined. A dentomaxillofacial radiologist observed the SAC based on CBCT image data and more specifically the parasagittal views to assess SAC's diameter and location.RESULTS:
The anterior and posterior SAC, double ASAC, intraosseous anastomoses and the extension of the anterior SAC to the piriform aperture were observed in 100, 73, 24.5, 38.5 and 84 % of the cases, respectively. The anastomosis was located between canine and first premolar in 43 % of the cases. The SAC diameters were in 80 % of the cases ≤1 mm, remaining canals had a diameter between 1 and 2 mm. The distance of the SAC to the alveolar crest ranged between 2.42 and 44.6 mm. The anterior SAC was more prevalent in the upper (53 %) and middle (44 %) thirds of the maxillary sinus, while the posterior SAC was more prevalent in the middle (36 %) and lower thirds (64 %). The distance was significantly bigger in men in some tooth positions.CONCLUSIONS:
Based on the present findings, one-fifth of the patients may have a diameter of the SAC >1 mm, large enough to cause bleeding and/or paraesthesia. CBCT imaging may assist surgeons to plan grafting and osteotomy procedures, while avoiding these neurovascular structures.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cuidados Pré-Operatórios
/
Implantes Dentários
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Tomografia Computadorizada de Feixe Cônico
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Levantamento do Assoalho do Seio Maxilar
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Seio Maxilar
Tipo de estudo:
Risk_factors_studies
Limite:
Adult
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Aged
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Surg Radiol Anat
Assunto da revista:
ANATOMIA
/
RADIOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article