In this retrospective clinical study the incidence of complications in 58 consecutive, with anterior screw fixation stabilized @entity1 after @entity174 of the odontoid process is evaluated. In 51 @entity1 the @entity174 has been defined as type II according to Anderson, in 6 @entity1 an oblique @entity174 was present and one @entity1 showed a cephalad @entity174 . Preoperatively, in only 19 % of the @entity1 (n = 11) no dislocation of the dens occurred. 32 @entity1 were treated with single screw osteosynthesis, in 26 @entity1 two screws were implanted. Significant complications with clinical relevance were registered in 14 @entity1 (24 %), in 10 cases (17 %) an operative reintervention was required. Intraoperatively, in one @entity1 a @entity397 of the carotid artery while winding around the motor drill occurred and in another case a complete malplacement of the screw posteriorly to the odontoid process was observed. A clearly excentric positioning of the implant was evaluated in 5 @entity1 with a consecutive high rate of implant migration (n = 3). Two @entity1 died perioperatively not related to the cervical injury. Postoperatively, one @entity1 with a @entity2737 due to an iatrogenic perforation of the esophagus required reoperation as well as 4 @entity1 with instability because of implant migration. @entity1 beyond the age of 65 years (n = 3) were significantly overrepresented in that group. In one case, the secondary intervention was caused by a @entity1516 of the dens @entity2270 . Complications without any relevance to the clinical and functional long term result were fusions in malposition of the odontoid process in 14 @entity1 (24 %) and 10 (17 %) marginal screw perforations laterally. Differences in the use of one or two screws have not been observed in this study, although the investigations showed a tendency between marginal lateral screw perforations and double screw osteosynthesis and an increasing number of complications in the geriatric cohort.

[Incidence of complications of the screw osteosynthesis of odontoid process XXXX ].

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity174 :: ('MESH:D050723', 'Disease') :: ['fractures', 'type III fracture', 'type II fracture', 'fracture'] @entity2737 :: ('MESH:D014946', 'Disease') :: ['wound infection'] @entity397 :: ('MESH:D012421', 'Disease') :: ['rupture'] @entity2270 :: ('MESH:C566610', 'Disease') :: ['axis'] @entity1516 :: ('MESH:D011542', 'Disease') :: ['pseudarthrosis']
@entity174 :: (MESH:D050723,Disease) :: ['fractures']
