Baumann, Florian and Schmitz, Paul and Mahr, Daniel and Kerschbaum, Maximilian and Gaensslen, Axel and Nerlich, Michael and Worlicek, Michael (2018) A guideline for placement of an infra-acetabular screw based on anatomic landmarks via an intra-pelvic approach. JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH, 13: 77. ISSN 1749-799X,
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Background: Due to demographic changes, more and more fracture patterns involving anterior acetabular structures occur. The infra-acetabular screw is seen a useful tool to increase stability in fixation of the acetabular cup. However, the exact position of this screw in relation to anatomic landmarks which are intra-operatively palpable via an intra-pelvic approach has not yet been determined. Methods: This biomorphometric experimental study references the ideal screw position of an infra-acetabular screw to anatomic landmarks palpable via an intra-pelvic approach. Therefore, we created a computer tomography-based 3D-model of 40 patients (20 women, 20 men) who received a computer tomography (CT) scan of the pelvis for any other reason than an acetabular fracture. Results: The entry point of an ideal infra-acetabular was of high constancy. At mean, this point was 10.2 mm caudal and 10.4 mm medial of the ilio-pubic/ilio-pectineal eminence. This reference is independent of age, gender, or physical dimensions. However, we found gender-dependent differences for the angulation and the length of the screw. Conclusions: This study provides a comprehensive guideline to determine the ideal entry point for an infra-acetabular screw via an intra-pelvic approach. The entry point is located 10.2 mm caudal and 10.4 mm medial of the ilio-pubic/ilio-pectineal eminence.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTRAPELVIC APPROACH; MODIFIED STOPPA; FRACTURE FIXATION; PLATE; CORRIDOR; STRENGTH; Acetabulum fracture; Screw fixation; Entry point; Infra acetabular screw; Anatomic landmarks; Intra-pelvic approach |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Unfallchirurgie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Mar 2020 13:18 |
| Last Modified: | 10 Mar 2020 13:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14736 |
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