A Retrospective and Prospective Study: Monocompartimental Knee Arthroplasty Combined With Anterior Cruciate Ligament Reconstruction Surgery - a Pilot Study (MONO-LCA)

January 22, 2026 updated by: Stefano Zaffagnini, Istituto Ortopedico Rizzoli
This study aims to collect datas about patient who underwent simultaneous monocompartimental knee replacement and anterior cruciate ligament recontruction

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Enrolling by invitation

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The aim is to understand if anterior cruciate ligament recontruction is mandatory in case of monocompartimental knee replacement, given the fact that anterior stability could be compromised at first in ACL (anterior cruciate ligament) deficient knees. Current datas in literature are not sufficient to establish if ACL must always be recontructed or if only in some cases

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
15

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Italy
      • Bologna, Italy, 40127
        • Istituto Ortopedico Rizzoli

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Patients affected by monocompartimental knee arthosis and ACL complete lesion in the same knee who underwent simoultaneous one stage ACLr + UKA

Description

Inclusion Criteria:

  • monocompartimental knee arthrosis and ACL complete lesion
  • High functional request
  • Follow up >12 m
  • Complete clinical and radiographic documentation
  • Patients who accepted to partecipate to the study
  • Patients who did non underwent surgical procedures in the controlateral knee

Exclusion Criteria:

  • two stage surgeries (UKA and ACLr)
  • patients affected by neuromuscolar disorders, or psychomotor disorders
  • further knee ligamentous associated lesions
  • revision surgery
  • low functional request due to comorbilities

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
UKA + LCA patients
Patients who underwent simultaneous anterior cruciate ligament and monocompartimental knee replacement
Procedure: UKA + ACLr
Simultaneous ACL reconstruction and Unicompartmental Knee Arthroplasty

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Tegner-Lysholm score
Time Frame: 12 months after surgery
The Tegner Lysholm Knee Scoring Scale is a questionnaire used to assess knee function and symptoms, particularly in the context of ligament injuries of the knee. It evaluates eight categories: pain, swelling, instability, locking, limp, stair climbing, squatting, and need for support. Each category is scored, and the total score, out of 100, reflects overall knee function. Higher scores indicate better knee function.
12 months after surgery

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
SF-36
Time Frame: 12 months after surgery
It consists of 36 questions assessing the patient's general health, divided into eight domains: physical functioning, role physical, bodily pain, general health, vitality, social functioning, emotional role, and mental health. The score ranges from a minimum of 0 to a maximum of 100 and has been validated in Italian.
12 months after surgery
Ucla
Time Frame: 12 months after surgery
It is a questionnaire used to define activity levels after knee arthroplasty. It is patient-reported and provides a score ranging from 1 to 10. It has also been validated in Italian.
12 months after surgery
Return to Sport
Time Frame: 12 months after surgery
Number of months elapsed before returning to sports activity (if resumed). Sports activities are classified according to Veil et al. into low-intensity, potentially low-intensity, intermediate-intensity, and high-intensity categories.
12 months after surgery
New KSS
Time Frame: 12 months after surgery
A self-administered knee function and outcome assessment test. Validation in Italian is still ongoing.
12 months after surgery
Vas
Time Frame: 12 months after surgery
Subjective pain assessment scale
12 months after surgery
KT-1000
Time Frame: 12 months after surgery
An objective tool for assessing anteroposterior knee laxity
12 months after surgery
ROM
Time Frame: 12 months after surgery
Active and passive range of motion
12 months after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Istituto Ortopedico Rizzoli

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Stefano Zaffagnini, Full Professor, Istituto Ortopedico Rizzoli

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 9, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 22, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 30, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 30, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 22, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • MONO-LCA

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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