Orbital reconstruction in cases of trauma is usually performed using the unaffected side orbital volume as a reference, but this measurement does not fully consider the anatomical characteristics of orbital surfaces. We propose a novel procedure based on the registration of 3D orbital segmented surfaces. Reconstructed orbits from 20 patients and healthy orbits from 13 control subjects were segmented from the post-operative CT-scans. The 3D orbital model from the unaffected orbit was “mirrored” according to the sagittal plane and superimposed onto the reconstructed one, with calculation of volumes, asymmetry index and point-to-point RMS (root mean square) distances. Inter- and intra-observer errors were tested through Bland–Altman plot. Differences in volume, asymmetry index and RMS value between the control group and the treated patients were assessed through two-way ANOVA and Student's t-test (p < 0.05). According to Bland–Altman test, intra- and inter-operator repeatability was respectively 87% and 89%. No significant differences in volume or asymmetry index between the control group and the treated patients were observed (p > 0.05), but the RMS value was significantly larger in the latter ones (on average, 0.90 ± 0.26 mm vs. 0.67 ± 0.17 mm, p < 0.05). Results show that the reconstructed orbits present a morphologically different surface from the unaffected ones.

Sozzi, D., Gibelli, D., Canzi, G., Tagliaferri, A., Monticelli, L., Cappella, A., et al. (2018). Assessing the precision of posttraumatic orbital reconstruction through “mirror” orbital superimposition: A novel approach for testing the anatomical accuracy. JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY, 46(8), 1258-1262 [10.1016/j.jcms.2018.05.040].

Assessing the precision of posttraumatic orbital reconstruction through “mirror” orbital superimposition: A novel approach for testing the anatomical accuracy

Sozzi, D;Canzi, G;Tagliaferri, A;Bozzetti, A;
2018

Abstract

Orbital reconstruction in cases of trauma is usually performed using the unaffected side orbital volume as a reference, but this measurement does not fully consider the anatomical characteristics of orbital surfaces. We propose a novel procedure based on the registration of 3D orbital segmented surfaces. Reconstructed orbits from 20 patients and healthy orbits from 13 control subjects were segmented from the post-operative CT-scans. The 3D orbital model from the unaffected orbit was “mirrored” according to the sagittal plane and superimposed onto the reconstructed one, with calculation of volumes, asymmetry index and point-to-point RMS (root mean square) distances. Inter- and intra-observer errors were tested through Bland–Altman plot. Differences in volume, asymmetry index and RMS value between the control group and the treated patients were assessed through two-way ANOVA and Student's t-test (p < 0.05). According to Bland–Altman test, intra- and inter-operator repeatability was respectively 87% and 89%. No significant differences in volume or asymmetry index between the control group and the treated patients were observed (p > 0.05), but the RMS value was significantly larger in the latter ones (on average, 0.90 ± 0.26 mm vs. 0.67 ± 0.17 mm, p < 0.05). Results show that the reconstructed orbits present a morphologically different surface from the unaffected ones.
No
Articolo in rivista - Articolo scientifico
Scientifica
3D segmentation; Maxillofacial surgery; Mirroring; Orbital fracture; RMS (root mean square); Titanium mesh;
3D segmentation; Maxillofacial surgery; Mirroring; Orbital fracture; RMS (root mean square); Titanium mesh; Surgery; Oral Surgery; Otorhinolaryngology2734 Pathology and Forensic Medicine
English
Sozzi, D., Gibelli, D., Canzi, G., Tagliaferri, A., Monticelli, L., Cappella, A., et al. (2018). Assessing the precision of posttraumatic orbital reconstruction through “mirror” orbital superimposition: A novel approach for testing the anatomical accuracy. JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY, 46(8), 1258-1262 [10.1016/j.jcms.2018.05.040].
Sozzi, D; Gibelli, D; Canzi, G; Tagliaferri, A; Monticelli, L; Cappella, A; Bozzetti, A; Sforza, C
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S1010518218303007-main.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 676.7 kB
Formato Adobe PDF
676.7 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/206301
Citazioni
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 8
Social impact