|
|
|
| Study On Anatomical Influencing Factors Of Ⅱ Odontoid Fracture |
| XIE Dong, et al |
| Weifang Medical College Clinical College, Shandong Weifang 262100, China |
|
|
|
|
Abstract Objective: By measuring the some anatomical parameters of odontoid process, and to explore the anatomical factors of odontoid type Ⅱ fractures. Methods:Choosing 25 cases of odontoid CT imaging data of normal anatomical structures, 24 cases of odontoid fracture CT imaging data and fracture displacement <2mm. The posterior slope angle, the side angle, and the transverse diameter and anteroposterior diameter of the base of odontoid were measured using the measurement scale of the PACS imaging system. And comparing the diffe differences between the two groups.Results: The posterior slope angle of normal anatomical structures was 17.56±1.61 °, the left side angle was 118.84±2.78 °, the right side angle was 119.13±3.04°, the transverse diameter of the base of odontoid was 9.73±0.98mm, the anteroposterior diameter of the base of odontoid was 11.97±0.96mm. The posterior slope angle of occurrence of II odontoid fracture was 15.13±1.35 °, the left side angle was 117.97±2.66 °, the right side angle was 119.35±2.13°, the transverse diameter of the base of occurrence of fracture of odontoid process was 9.82±1.21mm, the anteroposterior diameter of the base of odontoid was 9.46±0.89mm. Conclusion: The occurrence of Ⅱ odontoid fracture is related to the posterior slope angle of odontoid process,the smaller the posterior slope angle is, the more prone to fracture. The occurrence of Ⅱ odontoid fractures is related to the anteroposterior diameter of the base of the odontoid process,the shorter the anteroposterior diameter is,the more prone to fracture . Ⅱ odontoid fractures have nothing to do with the left and right side angle and the transverse diameter of the base of odontoid.
|
|
|
|
|
|
[1] Eap C, Barresi L, Ohl X, Saddiki ,C,et al. Odontoid fractures anterior screw fixation: A continuous series of 36 cases[J].Orthopaedics Traumatology Surg Res, 2010,96(7):748~752.
[2] Watanabe M, Sakai D, Yamamoto Y, et al. Analysis of predisposing factors in elderly people with type Ⅱ odontoid fracture[J].Spine,2014,14(6):861~866.
[3] Graham RS, Oberlander EK, Stewart JE et al.Validation and use of a finite element model of C-2 for determination of stress and fracture patterns of anterior odontoid loads[J].Neurosurg,2000,93(1 Suppl):117~125.
[4] Julien TP, Schoenfeld AJ, Barlow B et al.Subchondral cysts of the atlantoaxial joint: a risk factor for odontoid fractures in the elderly[J].Spine,2009,9(10):e1~4.
[5] Aydin K, Cokluk C.The segments and the inferior boundaries of the odontoid process of C2 based on the magnetic resonance imaging study[J].Turk Neurosurg,2008,18(1):23~29. |
|
|
|
2017, Vol. 23 
