The Impact of Obesity on Short Stem Total Hip Arthroplasty

Obesity and it's Impact on Subsidence and Clinical Outcomes After Short Stem Total Hip

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT06430723

Enrollment

200

Registered

2024-05-28

Start date

2018-01-01

Completion date

2024-01-31

Last updated

2024-06-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obesity, THA

Keywords

subsidence, obesity, short stem total hip arthroplasty, tha

Brief summary

The purpose of this study is to review the impact of obesity on subsidence and clinical outcome after short stem total hip arthroplasty.

Detailed description

Short stem total hip arthroplasty (THA) has gained popularity due to its bone-sparing technique, but its outcomes in obese patients remain uncertain. While studies on the mid-term outcome in a general patient cohort provide excellent results in terms of the clinical and radiological outcome as well as the complication rate of short stem THA, data on its use in obese patients is still rare and not sufficiently conclusive. Some studies have found no evidence of increased subsidence in obese patients, while other studies have shown contrary trends. In this context, the aim of this study was to investigate the relationship between BMI, postoperative subsidence and clinical outcomes in the setting of short stem THA.

Interventions

PROCEDURETotal hip arthroplasty

Total hip arthroplasty using short stem via an minimally invasive anterolateral approach

Study design

Observational model

CASE_CONTROL

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

1. patients who underwent primary short stem hip arthroplasty with Mathys Optimys short stem between 01.01.2018 and 31.12.2020 2. availability of preoperative and postoperative radiographs for assessment of subsidence 3. a minimum BMI of 30kg/m2 for the obese group 4. a minimum follow-up of 24 months.

Exclusion criteria

1. former surgeries of the hip in question 2. incomplete clinical data 3. incomplete radiological data

Design outcomes

Primary

Measure	Time frame	Description
Subsidence	2 years	subsidence of the short stem measured via EBRA (Einzelbild Röntgenanalyse), \[mm\]
Harris Hip Score	2 years	Clinical outcome, \[0-100points\]

Secondary

Measure	Time frame	Description
surgery time	2 years	Surgery time from cut to skin closure, \[minutes\]
Length of stay	2 years	Length of postoperative stay in hospital \[days\]
Blood loss	2 years	Blood loss calculated according to laboratory test results of hematocrit \[ml\]

Countries

Austria

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026