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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT00160758
Other study ID # 214-1999
Secondary ID
Status Completed
Phase Phase 4
First received September 8, 2005
Last updated October 26, 2012
Start date December 1999
Est. completion date September 2009

Study information

Verified date October 2012
Source University of Florida
Contact n/a
Is FDA regulated No
Health authority United States: Institutional Review Board
Study type Observational

Clinical Trial Summary

This purpose of this study is to measure the strength of tissue allografts that have been in the body various lengths of time.


Description:

Allograft bone is the primary source of graft material for large skeletal defects resulting from trauma, disease, oncological resection, or reconstruction of failed total joint arthroplasties. The physical characteristics of such grafts after various intervals of remodeling and incorporation in vivo have never been studied.

The purpose of this study is to obtain tissue from allografts retrieved at autopsy, at amputation for oncological complications and from patients undergoing revision procedures for failed allograft transplantation. We will evaluate the mechanical properties, histomorphometric indices and presence of microfractures.

Our hypotheses are:

- histomorphometric parameters of porosity and microfracture density will predict allograft strength,

- microfracture density will be correlated with time in vivo and allograft strength,

- the rate of host-allograft nonunion and fracture will correlate with radiation therapy and chemotherapy.

The retrieved tissue will be processed using standard undecalcified histology and quantitatively assessed for degree of incorporation, allograft porosity, and microfracture density. The biomechanical characteristics of the bulk allograft and allograft-host junction will be quantified and compared to allograft bone prior to transplantation.


Recruitment information / eligibility

Status Completed
Enrollment 18
Est. completion date September 2009
Est. primary completion date September 2009
Accepts healthy volunteers No
Gender Both
Age group N/A and older
Eligibility Inclusion Criteria:

- failed allograft bone

- removal of allograft due to oncological complications

- amputation due to oncological complications

Exclusion Criteria:

Study Design

Observational Model: Case-Only, Time Perspective: Prospective


Related Conditions & MeSH terms


Intervention

Procedure:
retrieve massive allograft
Allograft constructs removed because of infection or cancer complications will be retained for biomechanical testing

Locations

Country Name City State
United States UF Orthopaedics and Sports Medicine Institute Gainesville Florida

Sponsors (1)

Lead Sponsor Collaborator
University of Florida

Country where clinical trial is conducted

United States, 

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