Correction of Hallux Valgus With the Nexis® PECA Bunion Implantable Osteosynthesis Medical Device

Study Overview
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Brief Summary
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The Nexis® screw system is a range of osteosynthesis screws for the foot. Nexis® Bunion Screws are Class IIb implantable medical devices. The primary objective of the study is to confirm the performance and effectiveness of the device under investigation for the correction of hallux valgus with the evaluation functional capacities of the patient's foot. It will be assessed with general sub-score of the EFAS questionnaire determined during the postoperative visit at 6 months. The evaluation of quality of life scores, angular correction, bone consolidation and occurrence of adverse events will also be carried out.

Official Title
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Correction of Hallux Valgus With the Nexis® PECA Bunion Implantable Osteosynthesis Medical Device : Evaluation of Quality of Life Scores, Angular Correction, Bone Consolidation and Occurrence of Adverse Events

Conditions
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Hallux Valgus

Intervention / Treatment
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* Device: Nexis® PECA Bunion device


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient with a hallux valgus foot pathology requiring correction First line operation Use of the medical device concerned PECA Bunion Unilateral operation Patient aged 18 or over Isolated hallux valgus correction, without associated surgical procedures Patient able to respect the prescriptions and recommendations of his surgeon Patient able to read and understand the information note on the objectives of the study and the collection of their data Patient able to sign a consent form Exclusion Criteria: Patient with a contraindication to the device under investigation, Simultaneous participation in another clinical investigation protocol, Adults subject to legal protection (safeguard of justice, curatorship, guardianship), persons deprived of liberty, pregnant or breastfeeding women, minors.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Hallux valgus correction<br>Hallux valgus correction for all patients : intervention during intraoperative visit, with Nexis® PECA Bunion Implantable Osteosynthesis Medical Device | Device: Nexis® PECA Bunion device<br>* Hallux valgus correction with percutaneous chevron and Akin osteotomy.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Confirm performance and effectiveness of the device under investigation for the correction of hallux valgus in terms of functional capacities of patient's foot determined thanks to the general sub-score of the European Foot and Ankle Society scale | Confirm the performance and effectiveness of the device under investigation for the correction of hallux valgus in terms of functional capacities of the patient's foot, with the evaluation of the general sub-score of the European Foot and Ankle Society (EFAS) questionnaire during post-operative visit at 6 months. The questionnaire collects information on the following categories: functional capacity of the patient's foot in general (6 items), and functional capacity of the patient's foot during sport (4 items). The scores to be calculated range from 0-4 per question, 0-24 for the general category (the only category to be evaluated for the primary outcome). A score of 0 indicates the worst possible foot/ankle symptoms and 24 indicates no symptoms foot/ankle. In this study, an objective score of 16 (out of a total of 24) was determined | 6 months post-operative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Confirm performance and effectiveness of the device under investigation for the correction of hallux valgus with the evaluation of clinical parameters with the evaluation of the evolution of the pain with Visual Analog Scale | The VAS (Visual Analog Scale) score is a tool used to measure pain ranging from 0 (no pain) to 10 (very intense pain). An evolution of 4.63 is expected between preoperative visit and postoperative visits | 6-8 weeks, 3-4 months, 6 months and 2 years post-operative | 
| Confirm performance and effectiveness of the device under investigation for the correction of hallux valgus with evaluation of clinical parameters: evaluation of the evolution of the quality of life with American Orthopedic Foot and Ankle Scale | The American Orthopedic Foot and Ankle Score (AOFAS) combines subjective pain and function scores provided by the patient and objective scores based on the physician's physical examination. The questionnaire is composed of nine items, divided into three categories: pain, functional aspects and alignment, resulting in a total score of 100 points. A score of zero is equivalent to maximum disability and a score of 100 is equivalent to no disability. An improvement of 26.87 in the AOFAS score is expected at postoperative visits compared to preoperative visit. | 3-4 months, 6 months and 2 years post-operative | 
| Confirm the performance and effectiveness of the device under investigation for the correction of hallux valgus with the evaluation of clinical parameters : evaluation of the evolution of the quality of life with The Short Form (36) Health Survey | The Short Form (36) Health Survey is a standardized auto-questionnaire for measuring quality of life. The questionnaire is made up of 36 questions, divided into 8 dimensions: physical activity, life and relationships with others, physical pain, perceived general health, vitality, limitations due to mental state, limitations due to physical state, mental health. SF-36 is a 0-100 scale : a score of zero is equivalent to maximum disability and a score of 100 is equivalent to no disability. An improvement of 3.6 in the SF-36 score is expected at postoperative visits compared to preoperative visit | 6 months and 2 years post-operative | 
| Confirm performance and effectiveness of the device for the correction of hallux valgus with the evaluation of clinical parameters: evaluation of functionality of the foot in sport with sub-score sport of the European Foot and Ankle Society scale | The sport sub-score of the European Foot and Ankle Society (EFAS) questionnaire is used to measure the functional capacity of the patient's foot during sports practice and ranges from 0 to 16 for the sport category, with a score of 0 indicating the worst possible foot/ankle symptoms and 16 indicating no foot/ankle symptoms. An improvement of 4.7 in the sub-score sport of the EFAS is expected at postoperative visits | 3-4 months, 6 months and 2 years post-operative | 
| Confirm performance and effectiveness of the device for the correction of hallux valgus with the evaluation of radiographics parameters: evaluation of evolution of angular measures (hallux valgus, Inter-metatarsal and Distal Metaphyseal Articular Angles) | Hallux valgus angle (HVA), Inter-metatarsal angle (IMA) and Distal Metaphyseal Articular Angle (DMAA) are calculated with radiography. The expected angle correction is a reduction of 7.60° for HVA, 4° for IMA and 5.50° for DMAA at 6 months and 2 years postoperative. | 6-8 weeks, 3-4 months, 6 months and 2 years post-operative | 
| Confirm the performance and effectiveness of the device under investigation for the correction of hallux valgus with the evaluation of radiographics parameters (X-rays) with the evaluation of evolution of consolidation | The evaluation of bone consolidation on x-rays will be carried out by the surgeon. The presence of bone consolidation at a rate greater than or equal to 90% should be demonstrated at 6-8 weeks, 3-4 months, 6 months and 2 years postoperatively. | 6-8 weeks, 3-4 months, 6 months and 2 years post-operative | 
| Confirm the performance and effectiveness of the device under investigation for the correction of hallux valgus with the evaluation of clinical parameters thanks to the evaluation of mobility (dorsiflexion and plantar flexion) | Description and comparison of: Dorsiflexion mobility at V2 (6-8 weeks), V3 (3-4 months), 6 months (V4) and at 2 years (V5) compared to V0 : A mobility greater than or equal to 57.35° is expected. and Mobility in plantar flexion at V2 (6-8 weeks), V3 (3-4 months), 6 months (V4) and at 2 years (V5) compared to V0 : A mobility of 24.85° is expected. | 6-8 weeks, 3-4 months, 6 months and 2 years post-operative | 
| Confirm the safety of the device under investigation for the correction of hallux valgus by evaluating the occurrence of adverse events, complications and device defects | The occurrence of adverse events (including complications) and defects will be assessed intraoperatively and at each postoperative visit by questioning the patient, clinical and radiographic examinations. | From inclusion visit (V0) to 2 years post-operative visit |