A Positioning Navigation Template for Assisting the Placement of Modular Hemipelvic Endoprostheses for Patients Undergoing Pelvic Bone Tumor Resection.

Sponsor

Second Affiliated Hospital, School of Medicine, Zhejiang University (Other)

Overall Status

Completed

CT.gov ID

NCT04980729

Collaborator

(none)

Enrollment

Arms

90.9

Actual Duration (Months)

Study Details

Study Description

Brief Summary

Background:

Acetabular reconstruction in situ after extensive pelvic resection is technically challenging because the significant loss of bone stock and bony landmarks. The aim of the present study was to investigate the feasibility of an individualized navigation template for acetabular reconstruction following pelvic malignancy resection.

Methods:

This retrospective cohort study included patients who underwent type II or II+III pelvic tumor resection and reconstruction using a modular hemipelvic prosthesis. In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.

Condition or Disease	Intervention/Treatment	Phase
Pelvic Tumor	Device: Acetabular reconstruction after tumor resection.	N/A

Study Design

Study Type:

Interventional

Actual Enrollment :

36 participants

Allocation:

Non-Randomized

Intervention Model:

Parallel Assignment

Intervention Model Description:

This study is a "Retrospective Cohort Study" through retrospectively collecting patients undergoing acetabulum reconstruction after pelvic tumor resection. The patients were interfered with or without the acetabular navigation template during the hip reconstruction process.This study is a "Retrospective Cohort Study" through retrospectively collecting patients undergoing acetabulum reconstruction after pelvic tumor resection. The patients were interfered with or without the acetabular navigation template during the hip reconstruction process.

Masking:

Single (Outcomes Assessor)

Primary Purpose:

Treatment

Official Title:

A Novel Positioning Navigation Template for Accurately and Precisely Assisting the Placement of Modular Hemipelvic Endoprostheses for Patients Undergoing Pelvic Bone Tumor Resection: A Retrospective Cohort Study

Actual Study Start Date :

Jan 1, 2013

Actual Primary Completion Date :

Jul 31, 2020

Actual Study Completion Date :

Jul 31, 2020

Arms and Interventions

Arm	Intervention/Treatment
Experimental: the template-guided group In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction using a modular hemipelvic prosthesis.	Device: Acetabular reconstruction after tumor resection. In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.
Active Comparator: the traditional operation group In the traditional operation group (n = 14), acetabulum was manually reconstructed using a modular hemipelvic prosthesis by the surgeon's experience.	Device: Acetabular reconstruction after tumor resection. In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.
Sham Comparator: the validation group In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without acetabulum reconstruction.	Device: Acetabular reconstruction after tumor resection. In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.

Arm

Intervention/Treatment

Experimental: the template-guided group

In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction using a modular hemipelvic prosthesis.

Device: Acetabular reconstruction after tumor resection.

In the template-guided group (n = 10), a navigation template was designed and applied to assist acetabular reconstruction. In the traditional operation group (n = 14), the patients underwent the same surgery but without the navigation template. To compare the displacement of the hip rotation center before and after surgery between the two groups, an innovative method based on pelvic CT was developed and a validation group of cases was used to assess the effectiveness of this measurement approach. In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without hip joint reconstruction were included. The displacements for the validation group were calculated and compared with 0 cm, the theoretical value. Subsequently, the displacements between the template-guided group and the traditional operation group were compared.

Active Comparator: the traditional operation group

In the traditional operation group (n = 14), acetabulum was manually reconstructed using a modular hemipelvic prosthesis by the surgeon's experience.

Device: Acetabular reconstruction after tumor resection.

Sham Comparator: the validation group

In the validation group (n = 12), patients undergoing periacetabular puncture or curettage without acetabulum reconstruction.

Device: Acetabular reconstruction after tumor resection.

Outcome Measures

Primary Outcome Measures

Compare the change of acetabular rotation center before and after surgery between the template-guided group and the traditional operation group. ["through study completion, an average of 2 years"]
Compare the change of acetabular rotation center (the displacement displayed in centimeters) before and after surgery between the template-guided group and the traditional operation group based on preoperative and postoperative CT images.

Eligibility Criteria

Criteria

Ages Eligible for Study:

N/A and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

All the patients diagnosed with a pelvic tumor；
Underwent limb salvage surgery following type II or II+III pelvic resection；
Acetabulum reconstruction using a modular, titanium hemipelvic prosthesis.

Exclusion Criteria:

A lack of postoperative CT images;
Having undergone revision surgery or noninitial/primary resection;
unable to calculate the hip displacement by the specific measurement method we proposed.

Contacts and Locations

Locations

No locations specified.

Sponsors and Collaborators

Second Affiliated Hospital, School of Medicine, Zhejiang University

Investigators

Study Director: Nong Lin, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, China
Principal Investigator: Donghua Huang, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, China