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An anatomic study using three‐dimensional reconstruction for pterygopalatine fossa infiltration via the greater palatine canal

Identifieur interne : 004983 ( Main/Exploration ); précédent : 004982; suivant : 004984

An anatomic study using three‐dimensional reconstruction for pterygopalatine fossa infiltration via the greater palatine canal

Auteurs : Se Hwan Hwang [Corée du Sud] ; Jae Hyun Seo [Corée du Sud] ; Young Hoon Joo [Corée du Sud] ; Byung Guk Kim [Corée du Sud] ; Jin Hee Cho [Corée du Sud] ; Jun Myung Kang [Corée du Sud]

Source :

RBID : ISTEX:11D6AB9D48B599513A0E99468A3FCD6E0E2CA095

English descriptors

Abstract

The pterygopalatine fossa (PPF) is accessed via the greater palatine canal (GPC) in an attempt to reduce bleeding during paranasal sinus surgery. This study aims to investigate the anatomy of the greater palatine foramen (GPF), GPC, and the PPF, with reference to PPF infiltration using three‐dimensional reconstruction of computer tomographic (CT) scan measurements. The CT scans of 50 patients were retrospectively evaluated. The morphology of the GPF, GPC, and the PPF was assessed in a three‐dimensional model. The thickness of the mucosa over the GPF was evaluated in the parasagittal plane. The mean length of the GPC was 13.8 ± 2.0 mm, and the mean height of the PPF was 21.0 ± 3.4 mm. The mean angles of the GPC in relation to the hard palate and the PPF were 67.4° ± 6.9° and 159.8° ± 7.1°, respectively. The GPF was 16.2 ± 1.3 mm lateral to the sagittal plane of the posterior nasal spine (PNS) and 6.1 ± 1.7 mm anterior to the coronal plane of the PNS. The mean volume of the PPF was 1039.9 ± 280.0 mm3. The mean thickness of the mucosa overlying the GPF was 10.7 ± 1.8 mm. We recommend that the PNS may be used as the bony landmark to locate the position of the GPF during PPF infiltration. The needle delivering the anesthetic should be bent 25 mm from the tip at a 45° angle, and a 1‐ml injection of anesthetic should be administered in adults. Clin. Anat. 24:576–582, 2011. © 2011 Wiley‐Liss, Inc.

Url:
DOI: 10.1002/ca.21134


Affiliations:


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<div type="abstract" xml:lang="en">The pterygopalatine fossa (PPF) is accessed via the greater palatine canal (GPC) in an attempt to reduce bleeding during paranasal sinus surgery. This study aims to investigate the anatomy of the greater palatine foramen (GPF), GPC, and the PPF, with reference to PPF infiltration using three‐dimensional reconstruction of computer tomographic (CT) scan measurements. The CT scans of 50 patients were retrospectively evaluated. The morphology of the GPF, GPC, and the PPF was assessed in a three‐dimensional model. The thickness of the mucosa over the GPF was evaluated in the parasagittal plane. The mean length of the GPC was 13.8 ± 2.0 mm, and the mean height of the PPF was 21.0 ± 3.4 mm. The mean angles of the GPC in relation to the hard palate and the PPF were 67.4° ± 6.9° and 159.8° ± 7.1°, respectively. The GPF was 16.2 ± 1.3 mm lateral to the sagittal plane of the posterior nasal spine (PNS) and 6.1 ± 1.7 mm anterior to the coronal plane of the PNS. The mean volume of the PPF was 1039.9 ± 280.0 mm3. The mean thickness of the mucosa overlying the GPF was 10.7 ± 1.8 mm. We recommend that the PNS may be used as the bony landmark to locate the position of the GPF during PPF infiltration. The needle delivering the anesthetic should be bent 25 mm from the tip at a 45° angle, and a 1‐ml injection of anesthetic should be administered in adults. Clin. Anat. 24:576–582, 2011. © 2011 Wiley‐Liss, Inc.</div>
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