Subsidence of Short Stem THA With DORR Type C

NCT06768541 | Completed

• 1 other identifier: EK1330/2022
• Study Type: observational
• Target: 108
• Locations: 1 country
• Sites: 1

Brief Summary

Total hip arthroplasty (THA) is a widely accepted procedure for the treatment of end-stage hip osteoarthritis. Neck preserving short stems have gained popularity in recent years, as they aim to preserve proximal femoral bone stock and enable a more physiological load transfer. However, the use of these stems in patients with specific femoral deformities, such as DORR Type C femurs, can present unique challenges. DORR Type C femurs are characterized by decreased cortical bone thickness and increased medullary canal width, which can impact the fit and stability of the femoral stem component. Short stem total hip arthroplasty has emerged as a potential solution for these patients, as it aims to preserve proximal femoral bone stock and improve load transfer to the surrounding bone. This study seeks to investigate the measured subsidence of short stem total hip arthroplasty in patients with DORR Type C femur configuration and the clinical outcomes associated with this approach.

Conditions

Hip Osteoarthritis; Short Stem Prosthesis; Total Hip Arthroplasty (THA)

Outcome Measures

Primary Outcomes (1)

• Stem Subsidence

  Subsidence of the femoral stem, measured in mm

  2 years

Secondary Outcomes (3)

• HHS

  2 years

• OHS

  2 years

• SF-12

  2 years

Study Arms (1)

Dorr C Hip

Patients who received short stem THA with a Dorr C configuration of the femur

Procedure: THA using a short stem

Interventions

THA using a short stem PROCEDURE

Total Hip Arthroplasty using a collarless, triple-tapered cementless short stem (Optimys, produced by Mathys).

Dorr C Hip

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

108 patients were eligible, of which 55 underwent routine follow-ups. Complete data was available from 44 patients. 22 patients each were male and female. Mean age at surgery was 68.3 years. Mean BMI was 27.9 kg/m2

You may qualify if:

• THA using Optimys short stem from 1.1.2018 bis 31.12.2020 in the institution.
• Typ C Femur according to Dorr

You may not qualify if:

• none

Sponsors & Collaborators

• Krankenhaus Barmherzige Schwestern Linz: lead

Study Sites (1)

Ordensklinikum Linz Barmherzige Schwestern

Linz, 4010, Austria

Location

MeSH Terms

Conditions

Osteoarthritis, Hip

Condition Hierarchy (Ancestors)

Osteoarthritis; Arthritis; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 1, 2024
• First Posted: January 10, 2025
• Study Start: January 1, 2023
• Primary Completion: July 31, 2024
• Study Completion: March 31, 2025
• Last Updated: March 12, 2026

Record last verified: 2026-03

Locations

AU (1)