caa a22 4500 445831839 CHVBK 20180317145317.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00586-011-1765-y doi (NATIONALLICENCE)springer-10.1007/s00586-011-1765-y Anatomical determination of a safe entry point for occipital condyle screw using three-dimensional landmarks [Elektronische Daten] [Mehmet Ozer, Servet Celik, Figen Govsa, Mahmut Ulusoy] The occipital condyle (OC) is an important area in craniovertebral surgery, but neither its anatomical features nor the procedures concerning the OC have been detailed yet. The morphological analysis of the structures were made in totally 704 sides of the occipital bones of adult skulls by 3D-Doctor Demo version. The length and width of the OC were found to be 23.9±3.4 (right), 24±3.3 (left) and 11.9±2.3 (right), 10.7±2.3mm (left), respectively. The mean anterior intercondylar distance and the posterior intercondylar distance were measured as 20.9±3.6 and 43.1±4mm, respectively. The sagittal intercondylar angle was observed as 68.7±10.6º. The sagittal condylar angle was observed to be 32.9±7.6º and 38.2±7.3º in the right and left, respectively. The head circumference was observed to be 65.6±7.8 and 64.4±7.2mm in the right and left, respectively. The head area was measured as 231.9±53.3 and 214.9±45.1mm² in the right and left, respectively. The most common type was oval-like (59.67%), whereas the most unusual one was two-portioned condyle (0.32%). In Pearson correlation analysis, it was significant that a statistically strong relation was noticed between the length and area, and the circumference and area. The findings suggest that the oval type was more successful to work with, while the triangular, circular and two-portioned types were highly risky for the fixation resonance as the surface got quite smaller. As a result, we suggest that by resecting nearly half of the OC, the border of the hypoglossal canal can be involved. Springer-Verlag, 2011 Occipital condyle nationallicence Entry point nationallicence Craniovertebral fixation nationallicence Craniocervical junction nationallicence Ozer Mehmet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut Celik Servet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut Govsa Figen Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut Ulusoy Mahmut Department of Ophthalmology, Faculty of Medicine, Celal Bayar University, Manisa, Turkey aut European Spine Journal Springer-Verlag 20/9(2011-09-01), 1510-1517 0940-6719 20:9<1510 2011 20 586 https://doi.org/10.1007/s00586-011-1765-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00586-011-1765-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ozer Mehmet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 700 1- Celik Servet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 700 1- Govsa Figen Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 700 1- Ulusoy Mahmut Department of Ophthalmology, Faculty of Medicine, Celal Bayar University, Manisa, Turkey aut NATIONALLICENCE 773 0- European Spine Journal Springer-Verlag 20/9(2011-09-01), 1510-1517 0940-6719 20:9<1510 2011 20 586 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer