title: Using acetabular fossa as a guide for anticipated inclination of uncemented cup in total hip replacement.
abstract: Positions of acetabular implant generally are considered to be major causative factors of dislocation. Accurate and consistent achievement of the preoperatively anticipated orientation of the acetabular cup is a great challenge in total hip replacement (THR). In the present study, we investigated the surgical application of acetabular fossa as a guide for anticipated inclination of uncemented cup, and evaluated its accuracy as an anatomic reference for achieving the preoperatively anticipated abduction of the acetabular cup in comparison with traditional device method on cadaveric specimens. Sixteen normal adult pelvic cadaveric specimens were collected. On each of the sixteen normal adult pelvic cadaveric specimens, acetabular fossa related anatomic sites were marked and studied on pelvic radiographs. Our results showed that there is close correlation between most medial aspect of acetabular sourcil and central axis of the acetabular cup at anticipated inclination of 40° ± 5°. And the fossa group can achieve the preoperatively anticipated cup abduction more accurately than the device group. The current results demonstrated that acetabular fossa can be a reasonable alternative, or as a complement to the currently used methods guiding total hip replacement.
authors.affiliation: Department of Orthopedic surgery, The First Affiliated Hospital of Zhengzhou University No. 1 Eastern Jianshe Road, Zhengzhou 450052, Henan Province, China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Orthopedic surgery, The First Affiliated Hospital of Zhengzhou University No. 1 Eastern Jianshe Road, Zhengzhou 450052, Henan Province, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Gao
authors.affiliation: Department of Joint Surgery, Zhengzhou Orthopedics Hospital No. 58 Longhai Road, Zhengzhou 450052, Henan Province, China.
authors.forename: Guanghui
authors.initials: G
authors.lastname: Yang
authors.affiliation: Department Of Anatomy, School of Basic Medicine of Zhengzhou University No. 100 Science Road, Zhengzhou 450001, Henan Province, China.
authors.forename: Yanru
authors.initials: Y
authors.lastname: Zhang
keywords: Acetabular fossa; accuracy; anatomic reference; preoperative assessment; radiographic characteristics; total hip replacement