Does the Femoral Head Size Can Predict the Cup Size?

Does the Femoral Head Size Can Predict the Cup Size? Retrospective Study.

This study had four aims:

1. To evaluate the correlation between the planned preoperative cup size and the actual cup size that was implanted in surgery.
2. To examine the absolute difference between the implanted cup size diameter and the actual femoral head size diameter.
3. To examine the absolute difference between the planned cup size diameter and the actual femoral head size diameter
4. To suggest an additional online monitoring tool on the accuracy of the preoperative process and implant selection. We hypothesized that high accuracy rates will be found between the preoperative planned cup size and the actual implanted cup size. Furthermore, we hypothesized that strong correlations will be found between the planned and actual implanted cup size and the actual femoral head diameter size.

Study Overview

• Status: Completed
• Conditions: Total Hip Arthroplasty
• Intervention / Treatment: Other: There are no specific Intervention

Detailed Description

Methods This is a retrospective study , that will include patients who underwent primary cementless THA due to end-stage hip osteoarthritis during 2011 and 2013 . Inclusion criteria were: Patients that underwent primary THA due to end-stage primary osteoarthritis; Males and females between 15-90 years of age.

Data collection The following data will be collected: patients' characteristic including gender, age at surgery and side of surgery; implant information including cup model, planed cup size, actual cup size, shell type and outer diameter size (mm); actual femoral head diameter size (mm); the difference between the planned cup size and the actual cup size that was used; the difference between the actual femoral head diameter size measured at the end of surgery and the cementless implanted cup outer diameter size; the difference between the actual femoral head diameter size and the planed cup size..

• Study Type: Observational
• Enrollment (Actual): 83

Contacts and Locations

Study Locations

• Israel
  • Afula, Israel, 18101
    • Orthopedic department, HaEmek medical center
  • Afula, Israel, 18101
    • HeEmek medical center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 15 years to 90 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Patients that underwent primary Total hip arthroplasty due to end-stage primary osteoarthritis; Males and females between 15-90 years of age.

Description

Inclusion Criteria:

• Patients that underwent primary Total hip arthroplasty due to end-stage primary osteoarthritis;

Exclusion Criteria:

• Significant distortion in the femoral head.
• Previous reconstructive surgery - radial osteotomy and hip socket.

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Total hip arthroplasty	Other: There are no specific Intervention; are no specific Intervention; Other Names: are no specific Intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
To evaluate the correlation between the planned preoperative cup size and the actual cup size that was implanted in surgery.	up to one year

Secondary Outcome Measures

Outcome Measure	Time Frame
To examine the absolute difference between the implanted cup size diameter and the actual femoral head size diameter.	up to one year

Other Outcome Measures

Outcome Measure	Time Frame
To examine the absolute difference between the planned cup size diameter and the actual femoral head size diameter	up to one year

Collaborators and Investigators

• Sponsor: HaEmek Medical Center, Israel

Study record dates

Study Major Dates

• Study Start: July 1, 2013
• Primary Completion (Actual): February 1, 2014
• Study Completion (Actual): February 1, 2014

Study Registration Dates

• First Submitted: March 11, 2014
• First Submitted That Met QC Criteria: March 19, 2014
• First Posted (Estimate): March 21, 2014

Study Record Updates

• Last Update Posted (Estimate): March 21, 2014
• Last Update Submitted That Met QC Criteria: March 19, 2014
• Last Verified: March 1, 2014

More Information

Terms related to this study

• Keywords: Total hip arthroplasty; femoral head size; cup size
• Other Study ID Numbers: 0067-13-EMC