ProsthesisOSTEO-OUTCOMENCT06737770
Clinical and Functional Assessment of Patients With Transfemoral Amputation Treated With Osteointegrated Implant
A study testing osseointegrated surgery for transfemoral amputation in people with Prosthesis and Lower Limb Amputation Knee, run by Istituto Ortopedico Rizzoli at 1 site in Italy.
Trial summary
Limb amputation is a traumatic event that significantly reduces the ability to perform daily activities, impairs mobility, and lowers quality of life. In Italy, approximately 4 million people live with disabilities, with 1.2 million having motor disabilities. Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Prosthesis, Lower Limb Amputation Knee, Amputation; Traumatic, Leg, Lower
- What is being tested?
- osseointegrated surgery for transfemoral amputation
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 15 participants
- Where
- 1 siteItaly
- Study dates
- 31 Jan 2025to Jan 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subjects of both sexes, aged between 18 and 65 years;
- Subjects with unilateral transfemoral amputation, following trauma, tumor, infection, or congenital defect;
- Subjects already scheduled for osteointegrated prosthesis surgery for amputation;
- BMI < 35 kg/m²;
- Difficulty in using the traditional socket prosthesis (pain, reduced mobility, short residual limb, skin infections, ulcers, volume changes in the residual limb);
- Subjects who have signed informed consent and reviewed the study information sheet.
Show all 27Show fewer
- Absolute exclusion criteria:
- Peripheral vascular diseases;
- Pregnancy;
- Rheumatoid arthritis;
- Neurological deficits;
- Amputation of the contralateral limb;
- Active infections;
- Immunodeficiency;
- Comorbidities/concurrent disabilities, general or localized (Multiple Sclerosis, Parkinson's disease, muscle tone disorders, malignant neoplasms, etc.), that may interfere with the study;
- Presence of uncontrolled psychiatric comorbidities;
- Declared or evident cognitive deficits that would impair understanding of the tasks required (MMSE ≤ 24);
- Insufficient degree of cooperation;
- Length of the bone stump (measured from the lesser trochanter to the apex of the stump) less than 15 cm;
- Previous radiotherapy on the amputated limb;
- Ongoing chemotherapy treatments.
- Relative exclusion criteria:
- Smoking;
- Uncontrolled diabetes;
- Previous infections;
- Presence of additional joint prostheses on the same limb;
- Osteoporosis with a T-score of -2.5 or lower.
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Italy1 site, 1 recruiting
- Recruiting
IRCCS Rizzoli Orthopedic Institute
Bologna, 40136
Stefano Zaffagnini, 0516366075, stefano.zaffagnini@ior.it
About this study
Limb amputation is a traumatic event that significantly reduces the ability to perform daily activities, impairs mobility, and lowers quality of life. In Italy, approximately 4 million people live with disabilities, with 1.2 million having motor disabilities. Among lower limb amputees (around 200,000), most are elderly, with amputations due to diabetic or vascular issues. Other groups include middle-aged adults (often victims of workplace accidents) and young individuals (victims of traffic accidents).
Post-amputation rehabilitation mainly involves the use of prostheses, which, however, can cause skin problems due to the socket (the part that anchors the prosthesis to the residual limb). Among patients using a socket, 34-63% develop chronic skin issues and pain. Complications include excessive sweating, sores, abscesses, and irritation. Additionally, daily volume changes in the residual limb and long-term weight fluctuations further complicate the use of conventional prostheses.
Read more
In the last two decades, research groups, assisted by experienced surgeons, have worked to develop implant solutions that bypass the socket and address these issues. One such solution is osteointegrated prostheses, which use the principle of osteointegration to anchor the prosthesis directly to the bone of the residual limb. A metal stem is surgically inserted into the medullary canal of the residual limb and fixed through bone growth, establishing a direct connection between the amputated limb and the external prosthesis.
Osteointegrated prostheses are widely accepted worldwide as a valid alternative to socket prostheses, especially for young and active individuals with transfemoral, transtibial, transhumeral, or transradial amputations not caused by vascular issues. The key benefit of osteointegration is the restoration of load alignment along the anatomical and mechanical axis, improving control of the residual limb during walking, as well as overall functional capacity and quality of life. Other advantages include greater stability, enhanced sitting comfort, a wider range of hip movement, faster attachment and detachment of the prosthesis, and improved body perception. Additionally, the direct contact between the metal stem and the bone generates sensory feedback (osteoperception), allowing the patient to better control the amputated limb by perceiving ground contact through vibrations transmitted to the bone. Osteointegration offers the only viable alternative for prosthetic use in patients with a short residual limb, where conventional socket prostheses would not be suitable.
- Being tested
- osseointegrated surgery for transfemoral amputation
- Keywords
- Osseointegration
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
osseointegrated surgery for transfemoral amputationProcedure or surgery
osseointegrated surgery for transfemoral amputation
| Study group | Role | What they receive |
|---|---|---|
| patients undergoing osseointegration surgery for transfemoral amputation | Experimental | Not described Receives: Procedure: osseointegrated surgery for transfemoral amputation |
What is being measured
The primary outcome is the main question the study is designed to answer.
EQ-5D-5L
It is a generic tool for measuring perceived quality of life in relation to health status, divided into 5 domains, each assigned a score ranging from 1 (best possible outcome) to 5 (worst possible outcome): mobility, self-care, daily activities, pain/discomfort, and anxiety/depression. Additionally, there is a domain related to general health, scored from 0 (worst possible health status) to 100 (best possible health status)
Measured: 12 months after surgery
Secondary outcomes (6)
Q-TFA
Assessment of quality of life specifically for amputee subjects through the 'Transfemoral Amputation Questionnaire' (Q-TFA), a questionnaire that evaluates prosthesis use and mobility, as well as the individual's issues and general health.
Measured: 12 months after surgery
VAS
It is a unidimensional quantitative pain rating scale with 10 points. The scale requires the patient to select the number that best describes the intensity of their pain, from 0 to 10, at that specific moment. 0 means no pain, and 10 indicates the worst possible pain.
Measured: 12 months after surgery
ABIS
The Body Image Scale for Amputees is a self-administered questionnaire designed to specifically measure body image perception in amputees from the patient's perspective.
Measured: 12 months after surgery
TAPES
The Trinity Amputation and Prosthesis Experience Scales is a self-administered questionnaire that includes the domains of psychosocial adjustment, activity restriction, and prosthesis satisfaction, each divided into 3 subscales. Additionally, it explores residual pain, phantom limb pain, and other medical issues, thus incorporating both the physical and psychosocial aspects of adaptation.
Measured: 12 months after surgery
PWB-PTCQ
The Psychological Well-Being-Post-Traumatic Changes Questionnaire is a self-assessment tool designed to evaluate perceived changes in psychological well-being following traumatic events. The PWB-PTCQ is based on a well-established theoretical framework of psychological well-being (PWB) and adopts the general format of existing measures of growth.
Measured: 12 months after surgery
WHODAS 2.0
The WHO Disability Assessment Schedule is an assessment questionnaire based on the International Classification of Functioning, Disability and Health (ICF) that measures health and disability status. The questionnaire is designed to assess the level of functioning across six domains: cognitive activities, mobility, self-care, interpersonal relationships, daily living activities, and participation.
Measured: 12 months after surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Dec 2024
- Study start31 Jan 2025
- Primary completionOct 2026 (estimated)
- Study completionJan 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ProsthesisStudies of the same condition, open and under way.
- More trials run by Istituto Ortopedico RizzoliThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 15 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Istituto Ortopedico Rizzoli
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Stefano Zaffagnini, Istituto Ortopedico Rizzoli
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06737770
- Sponsor's protocol ID
- OSTEO-OUTCOME
- Acronym
- OSTEO-OUTCOME
- Status last verified
- Feb 2026
- First submitted
- 11 Dec 2024
- Last updated
- 17 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 17 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Clinical and Functional Assessment of Patients With Transfemoral Amputation Treated With Osteointegrated Implant
- ClinicalTrials.gov ID
- NCT06737770
- Acronym / sponsor ID
- OSTEO-OUTCOME / OSTEO-OUTCOME
- Keywords
- Osseointegration
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 15 participants (estimated)
- Lead sponsor
- Istituto Ortopedico RizzoliUniversity, hospital or other
- Study start
- 31 Jan 2025 (actual)
- Primary completion
- Oct 2026 (estimated)
- Study completion
- Jan 2027 (estimated)
- First posted
- 17 Dec 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Limb amputation is a traumatic event that significantly reduces the ability to perform daily activities, impairs mobility, and lowers quality of life. In Italy, approximately 4 million people live with disabilities, with 1.2 million having motor disabilities. Among lower limb amputees (around 200,000), most are elderly, with amputations due to diabetic or vascular issues. Other groups include middle-aged adults (often victims of workplace accidents) and young individuals (victims of traffic accidents).
Post-amputation rehabilitation mainly involves the use of prostheses, which, however, can cause skin problems due to the socket (the part that anchors the prosthesis to the residual limb). Among patients using a socket, 34-63% develop chronic skin issues and pain. Complications include excessive sweating, sores, abscesses, and irritation. Additionally, daily volume changes in the residual limb and long-term weight fluctuations further complicate the use of conventional prostheses.
In the last two decades, research groups, assisted by experienced surgeons, have worked to develop implant solutions that bypass the socket and address these issues. One such solution is osteointegrated prostheses, which use the principle of osteointegration to anchor the prosthesis directly to the bone of the residual limb. A metal stem is surgically inserted into the medullary canal of the residual limb and fixed through bone growth, establishing a direct connection between the amputated limb and the external prosthesis.
Osteointegrated prostheses are widely accepted worldwide as a valid alternative to socket prostheses, especially for young and active individuals with transfemoral, transtibial, transhumeral, or transradial amputations not caused by vascular issues. The key benefit of osteointegration is the restoration of load alignment along the anatomical and mechanical axis, improving control of the residual limb during walking, as well as overall functional capacity and quality of life. Other advantages include greater stability, enhanced sitting comfort, a wider range of hip movement, faster attachment and detachment of the prosthesis, and improved body perception. Additionally, the direct contact between the metal stem and the bone generates sensory feedback (osteoperception), allowing the patient to better control the amputated limb by perceiving ground contact through vibrations transmitted to the bone. Osteointegration offers the only viable alternative for prosthetic use in patients with a short residual limb, where conventional socket prostheses would not be suitable.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| patients undergoing osseointegration surgery for transfemoral amputation | Experimental | Procedure: osseointegrated surgery for transfemoral amputation |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (27 listed)
- Subjects of both sexes, aged between 18 and 65 years;
- Subjects with unilateral transfemoral amputation, following trauma, tumor, infection, or congenital defect;
- Subjects already scheduled for osteointegrated prosthesis surgery for amputation;
- BMI < 35 kg/m²;
- Difficulty in using the traditional socket prosthesis (pain, reduced mobility, short residual limb, skin infections, ulcers, volume changes in the residual limb);
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| osseointegrated surgery for transfemoral amputationosseointegrated surgery for transfemoral amputation | Procedure or surgery | patients undergoing osseointegration surgery for transfemoral amputation |
Primary outcome
EQ-5D-5L
Time frame: 12 months after surgery
It is a generic tool for measuring perceived quality of life in relation to health status, divided into 5 domains, each assigned a score ranging from 1 (best possible outcome) to 5 (worst possible outcome): mobility, self-care, daily activities, pain/discomfort, and anxiety/depression. Additionally, there is a domain related to general health, scored from 0 (worst possible health status) to 100 (best possible health status)
6 secondary outcomes
Q-TFA
Time frame: 12 months after surgery
VAS
Time frame: 12 months after surgery
ABIS
Time frame: 12 months after surgery
TAPES
Time frame: 12 months after surgery
PWB-PTCQ
Time frame: 12 months after surgery
WHODAS 2.0
Time frame: 12 months after surgery
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Feb 2026.
- Individual participant dataSharing planned: Undecided
Related trials for Prosthesis
Active, not recruiting
Comparison of the Balloon-Expandable Edwards Valve and Self-Expandable CoreValve Evolut R or Evolut PRO System for the Treatment of Small, Severely Dysfunctional Surgical Aortic Bioprotheses. The 'LYTEN' Trial
Aortic Valve Stenosis, Regurgitation, Aortic
Not yet recruiting
Study Evaluating the Safety and Efficacy of the TMChM Prosthesis in the Treatment of People With Chronic Flexor Tendon Fingers Injuries
Tendon Injuries
Recruiting
Hand Prosthesis Usability and Performance
Amputation
Active, not recruiting
Survivorship of Attune Primary Total Knee Prosthesis
Noninflammatory Degenerative Joint Disease
Recruiting
Uses of Phantom Sensations Induced by Global and Local Modifications of the Prosthetic Socket as Somatosensory Feedback During Walking in Lower Limb Amputees
Lower Limb Amputation
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing osseointegrated surgery for transfemoral amputation in people with Prosthesis and Lower Limb Amputation Knee, run by Istituto Ortopedico Rizzoli at 1 site in Italy.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 27 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 17 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Italy. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
EQ-5D-5L (time frame: 12 months after surgery). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Feb 2026.