Local Remodelling of Bone Fracture Healing

Local Remodelling and Mechanoregulation of Bone Fracture Healing in Healthy, Aged, and Osteoporotic Humans

The aim of our study is to improve a mathematical model (FAE) of human bone healing using the example of the distal spoke fracture. Computer-aided strength analyzes of data from hr-pqCTs should provide information about the fracture strength and quality of the newly formed bone at defined times. Laboratory parameters from sober blood analyzes, bone remodeling markers, competitive x-rays, the course of pain, range of motion, grip strength and other easily accessible parameters should be evaluated with the above-mentioned analyzes.

Study Overview

• Status: Completed
• Conditions: Distal Radius Fracture; Fracture Healing
• Intervention / Treatment: Diagnostic test: HR-pQCT (high resolution computertomograph); Diagnostic test: Blood withdrawal

Detailed Description

So far, empirical values have mainly been used to assess fracture healing. The clinical parameter used is freedom from pain over the fracture, and native radiology the callus formation. In the case of anatomically reduced fractures, however, this can hardly be observed. In the case of a distal radius fracture, it is assumed that the total time to complete healing and resilience is one year. However, this has not been proven biomechanically.

The high-resolution peripheral quantitative computed tomography offers the possibility of precisely describing the healing process in the high-resolution range using the trabecular structure, bone density, bone volume and tissue composition. The finite element analysis can then be used to calculate the load-bearing capacity of the bone and to create failure models. The distal radius fracture is one of the most common fractures in humans, especially in osteoporosis. Due to its frequency and easily accessible fracture localization, it is an ideal model for investigating fracture healing. The additional examination of blood and urine for bone loss markers can provide further information on the healing process in conjunction with the image data.

It is a prospective cohort study. The collected data are compared on the one hand with preliminary examinations of the injured side in the sense of creating a model and on the other hand with the healthy, non-fractured side in order to compare the strength of the fracture.

Performing the X-ray and HR-pQCTs leads to radiation exposure which, however, can be classified as low. (X-ray: 0.02 mSv / image; HR-pQCT: between 0.003 - 0.006 mSv / stack image). The DXA examination on the distal radius, femur / hip + lumbar spine requires 0.405 mSv. With 18 x-rays and 24 HR-pQCTs and 1 DXA per patient, there is a radiation exposure of 0.837 - 0.909 mSv over the course of the academic year.

Blood will also be taken and urine samples will be collected. Together with the clinical examination and filling in the questionnaire, each examination should take approx. 45 minutes.

• Study Type: Interventional
• Enrollment (Actual): 106
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: ADULT; OLDER_ADULT; CHILD
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Age 18+
• Conservatively treated distal radius fracture
• Able and agree to sign a written consent
• Able and agree to attend the follow-up examinations
• Able to understand the national language both in writing and orally to a minimum

Exclusion Criteria:

• Age under 18
• Comminuted fracture
• Bilateral spoke fracture
• unstable fracture with indication for surgical treatment
• open spoke fracture
• Adjacent fractures or injuries
• Previous injury to the distal radius
• The patient cannot give consent due to physical or mental disabilities
• Patient is not available for regular check-ups (abroad)
• The patient does not have full legal capacity
• Alcohol and drug abuse
• Current treatment with steroids
• Multiple trauma
• Illnesses or disorders that restrict the movement of a hand (apoplexy, hemiparesis, neuromuscular or rheumatic disease, severe mental or metabolic diseases)
• Rheumatoid arthritis
• Previous radio or chemotherapy within the last year
• Currently participating in a pharmaceutical study

Study Plan

How is the study designed?

Design Details

• Primary Purpose: BASIC_SCIENCE
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

EXPERIMENTAL: HR-pQCT (high resolution computertomograph); This arm is the inverventional group for all collected cases. No other arms are available as comparator or control. All patients are treated the same. Description of the intervention in the section "Intervention".

Diagnostic test: HR-pQCT (high resolution computertomograph); In addition to determining the bone density, a quantitative bone structure analysis with measurement of the number of thickness and distribution of the trabeculae can also be carried out. In addition, the finite element analysis (FEA) allows strength models of the examined bone to be created from the data of the hr-pqCTs. In this way, the osseous consolidation of the fracture can not only be observed, but also tested for resilience with the help of mathematical models.; Diagnostic test: Blood withdrawal; Bone remodeling blood marker: S-CTX (Crosslaps), S-TRA5b ( tartrate-resistant acid phosphatase), S-PINP (Procollagen type 1 amino-terminal propeptide), BALP, Calcium, parathyroid hormone, 25-OH-Vitamin D3 (HPLC)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Strength analysis of the distal radius fracture	The aim of our study is to create a mathematical model of human bone healing using the example of a distal radius fracture. Computer-aided strength analyzes of data from hr-pqCTs should provide information about the fracture strength and quality of the newly formed bone at defined times.(finite element analysis- FEA)	1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rate of bone density	Amount of bone mineral in bone tissue, using DXA Scan (Dual-xray absorbtiometry).	1year
Bone remodeling markers (blood analysis)	Concentration of bone remodeling markers of (sober) blood samples with signs of healing in hr-pqCT and conventional X-rays. Blood markers of bone remodeling are: S-CTX (Crosslaps), S-TRA5b ( tartrate-resistant acid phosphatase), S-PINP (Procollagen type 1 amino-terminal propeptide), BALP, Calcium, parathyroid hormone, 25-OH-Vitamin D3 (HPLC). Increaseing bone turnover values during healing period.	1year
Patient Reported Outcome (function)	Percentage of the patients with reduced or normal outcome after fractures using questionnaires like the Michigan Wrist Score in correlation of the healing process. This is a score reporting the functional outcome, satisfaction and quality of life. Best score is 100%, least score 0%.	1 year
Patient Reported Outcome (pain)	Percentage of the patients with remaining pain after fracture using the visual analog scale in correlation of the healing process. The scale reports about the intensity of pain. The maximum pain and least score is 10, and the best score is 0 which means "no pain".	1 year
Clinical outcome (range of motion)	Degree of the possible range of motion using a goniometer to measure the movement angles in correlation of the healing process. The better the range of motion the higher the value. Normally the following limits are given: Radial: least 0 degree, maximum: 20 degree Ulnar: least 0 degree, maximum: 40 degree Extension: least 0 degree, maximum: 70 degree Flexion: least 0 degree, maximum: 70 degree Pronation: least 0 degree, maximum: 90 degree Supination: least 0 degree, maximum: 90 degree	1 year
Clinical outcome (grip strength wrist)	Extent of possible grip strength measurement using dynanometer in correlation of the healing process. Minimum: 0 kilogram Maximum: 80 kg	1 year

Collaborators and Investigators

• Sponsor: Medical University Innsbruck
• Collaborators: ETH Zurich; University Hospital Ulm

Study record dates

Study Major Dates

• Study Start (ACTUAL): December 10, 2015
• Primary Completion (ACTUAL): January 17, 2019
• Study Completion (ACTUAL): December 19, 2019

Study Registration Dates

• First Submitted: February 15, 2021
• First Submitted That Met QC Criteria: March 2, 2021
• First Posted (ACTUAL): March 5, 2021

Study Record Updates

• Last Update Posted (ACTUAL): March 5, 2021
• Last Update Submitted That Met QC Criteria: March 2, 2021
• Last Verified: February 1, 2021

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Wounds and Injuries; Arm Injuries; Forearm Injuries; Fractures, Bone; Radius Fractures
• Other Study ID Numbers: I-3258-B27_microCT Radius

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No