Overview
Nonunion of fractures occurs when a broken bone fails to heal within the expected timeframe despite adequate treatment, leading to persistent pain, deformity, and functional impairment 4.Diagnosis
Clinical Presentation: Persistent pain, swelling, and limited range of motion 4.
Imaging: Radiographs showing lack of bridging callus formation, CT or MRI for detailed assessment 4.
Grading: Specific classifications exist for scaphoid (e.g., Herbert classification), acromion/scapular spine, and coracoid fractures, aiding in diagnosis and treatment planning 123.Management
First-Line Treatments:
- Scaphoid Nonunion: Arthroscopic intervention shows high union rates and satisfactory outcomes 1.
- Long Bone Nonunion: Conventional surgical techniques such as bone grafting, internal fixation, and compression methods 4.
Adjunctive Treatments:
- Biological Augmentation: Use of autografts, allografts, or bioabsorbable materials to enhance healing 4.
- Infection Management: Addressing any underlying infection with appropriate antibiotics and surgical debridement if necessary 4.Special Populations
Comorbidities: Seizure disorders and renal osteodystrophy can predispose to coracoid process nonunion 3.
No Specific Guidance: Limited evidence directly addressing management in pregnancy, pediatrics, or elderly populations 12345.Key Recommendations
Arthroscopic Management for Scaphoid Nonunion: Consider arthroscopic intervention for achieving bone union and improved clinical outcomes 1 (Evidence: Moderate).
Surgical Techniques for Long Bone Nonunion: Employ conventional surgical techniques including bone grafting and internal fixation for effective management 4 (Evidence: Strong).
Early Diagnosis and Classification: Utilize appropriate imaging and classification systems (e.g., Ogawa for coracoid, Herbert for scaphoid) to guide treatment decisions 123 (Evidence: Moderate).References
1 Basso MA, Smeraglia F, Ocampos-Hernandez M, Balato G, Bernasconi A, Corella-Montoya F. Scaphoid fracture non-union: a systematic review of the arthroscopic management. Acta bio-medica : Atenei Parmensis 2023. link
2 Ogawa K, Matsumura N, Yoshida A, Inokuchi W. Nonunion of the so-called acromion: a systematic review with consideration of the terminology. Archives of orthopaedic and trauma surgery 2023. link
3 Ogawa K, Matsumura N, Yoshida A. Nonunion of the coracoid process: a systematic review. Archives of orthopaedic and trauma surgery 2021. link
4 Nicholson JA, Makaram N, Simpson A, Keating JF. Fracture nonunion in long bones: A literature review of risk factors and surgical management. Injury 2021. link
5 Freeman BH, Hay EL. Nonunion of the capitate: a case report. The Journal of hand surgery 1985. link80102-7)