New Evaluation Method for Bone Formation around a Fully Hydroxyapatite-Coated Stem Using Digital Tomosynthesis: A
Sho Totsuka1, Tomofumi Nishino1, Ryunosuke Watanabe1
1Department of Orthopaedic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan.
Diagnostics (Basel, Switzerland)
|November 27, 2021
Summary
Digital tomosynthesis (DTS) offers improved imaging for total hip arthroplasty (THA) implants. DTS clearly shows bone formation around HA-coated stems, unlike plain radiography which can be misleading.
Area of Science:
- Orthopedic imaging
- Biomaterials science
- Radiology
Background:
- Cementless total hip arthroplasty (THA) using hydroxyapatite (HA)-coated stems is common.
- Assessing implant fixation via plain radiography can be challenging due to bone condensation.
- Digital tomosynthesis (DTS) is an emerging radiographic technique.
Purpose of the Study:
- To compare plain radiography and DTS for evaluating imaging findings after THA with HA-coated stems.
- To determine the diagnostic utility of DTS in visualizing bone formation around implants.
Main Methods:
- Retrospective cross-sectional study.
- Comparison of plain radiography and DTS imaging.
- Inclusion of 40 joints (20 each at 1 and 3 years post-surgery) with HA-coated THA stems.
Main Results:
- DTS confirmed bone formation around the HA-coated stem in all cases.
- Plain radiography often failed to reproduce these findings, showing unclear reactions or mimicking reactive lines.
- DTS demonstrated superior ability to visualize periprosthetic bone formation.
Conclusions:
- Digital tomosynthesis is a valuable tool for diagnosing bone formation around HA-coated hip arthroplasty stems.
- DTS provides clearer imaging compared to plain radiography for assessing implant integration.
- This technique aids in the accurate evaluation of cementless THA outcomes.
