Related Experiment Video
Updated: Jun 26, 2026
Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System
Published on: May 5, 2022
Comparison of navigation accuracy in THA between the mini-anterior and -posterior approaches
Takehito Hananouchi1, Masaki Takao, Takashi Nishii
1Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan. hana-osaka@umin.net
Background:
The accuracy of a CT-based hip navigation might depend on surgical approaches, resulting in varying accuracy of implant alignment.
Methods:
We performed primary cementless total hip arthroplasty (THA) with mini-incision surgery (MIS) to 40 well-matched patients (anterior or posterior approaches, 20 hips each), using navigation with surface registration. We investigated cup alignment using postoperative computed tomography (CT) and compared the navigation accuracy between the two approaches, i.e. the difference between intra-operative and postoperative alignments of the cup.
Results:
There was no significant difference between the two approaches. The mean navigation accuracies in abduction and anteversion were 2.0 degrees (SD 1.4 degrees) and 2.7 degrees (SD 1.9 degrees), respectively, in the anterior approach, and 2.4 degrees (SD 2.0 degrees) and 2.0 degrees (SD 1.4 degrees), respectively, in the posterior approach. All cup alignments were within 10 degrees of the target orientation.
Conclusions:
This CT-based navigation for MIS-THA provides navigation accuracy without significant differences between the two approaches and with favourable alignment of the cup.
