A Study of Collagen Scaffold for the Repair of Elbow Cartilage Injury

The MOCART scoring system is a standardized assessment tool based on magnetic resonance imaging (MRI) specifically designed to quantify the morphological effects after articular cartilage repair. The scoring system uses a 100-point system (minimum score of 0, maximum score of 100), with higher scores representing better repair results. A total score of ≥75 indicates that the repaired tissue is close to normal hyaline cartilage in terms of structure, integration, and signal strength, while a score below 50 indicates poor repair effect or risk of complications. The assessment covered seven core indicators: volume filling of cartilage defects (0-20), integration with adjacent cartilage margins (0-15), repaired tissue surface structure (0-10), repaired tissue structure (0-10), repaired tissue signal intensity (0-15), subchondral bone changes (0-20), and bone quality changes (0-10).

The VAS scoring system is a standardized subjective symptom assessment tool designed based on the principle of visual simulation, with a core form of a 10 cm long straight line, with a minimum score of 0 (representing no symptoms) and a maximum value of 10 (representing the most severe symptoms), with higher scores indicating more severe symptoms.

The Mayo Elbow Performance Score (MEPS) is a standardized tool for quantitatively assessing elbow function, with a score ranging from 0-100 , with higher scores indicating better elbow joint function (e.g.≥, 90 points are "excellent", 75-89 points are "good", and 60-74 points are "acceptable", <60 points are "poor"). The scoring system is evaluated comprehensively through four core dimensions: 1. Pain (0-45 points): graded according to pain frequency and severity, no pain is a full score, and loss of mobility is 0 points; 2. Motor function (0-20 points): based on flexion and extension mobility (20 points are scored for 100° of motion arc≥ only 5 points are scored for 50° of <); 3. Stability (0-10 points): evaluate the degree of varus laxity (no full score for relaxation, 0 points for obvious instability); 4. Daily living ability (0-25 points): Test five actions (combing hair, eating, personal hygiene, wearing shirts, shoes), 5 points for each item.

The Oxford Elbow Score (OES) is a self-rated standardized instrument for assessing elbow disease or postoperative functional recovery on a scale of 0-100, with higher scores indicating better elbow function (e.g., better pain control, mobility, and quality of life). The scoring system consists of three aspects: 1. Elbow pain (4 questions, assessing pain frequency, intensity and impact on life); 2. Elbow function (4 questions, test mobility, grasp and daily activities); 3. Psychosocial impact (4 questions, focusing on social, emotional and appearance satisfaction).

The DASH scoring system is a standardized self-assessment tool for quantifying the assessment of upper extremity dysfunction on a scale of 0-100, with higher scores indicating more severe upper limb dysfunction (e.g., pain, limited mobility, and more significant impact on life). The scale consists of 30 core questions covering two main areas:1. Functional disability (21 questions): Evaluate daily living ability (such as opening doors, lifting objects, writing, dressing); 2. Symptoms and social impact (9 questions): quantify pain, numbness, sleep disturbance, and social/work limitations.

Normal mobility is the basis for maintaining daily movements, and restriction or excessive can lead to functional impairment. Elbow range of motion is divided into four directions, as follows: flexion, extension, pronation, and supination

Rate of postoperative complications in each group, such as infection, hematoma, severe pain, joint adhesions, nerve damage, etc.