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Updated: Dec 29, 2025
Assessment of Bone Fracture Healing Using Micro-Computed Tomography
Published on: December 9, 2022
A computed tomography-based classification of Hoffa fracture: Surgical treatment considerations and prognostic
Rex Chandrabose1, Sayantan Saha1, Harish Kumar1
1Department of Orthopaedic Surgery, Rex Ortho Hospital, India.
Insights
A new classification for Hoffa fractures improves surgical planning and outcomes. This system accurately predicts results based on fracture patterns, guiding treatment for better patient recovery.
Area of Science:
- Orthopedic Surgery
- Radiology
- Trauma Care
Background:
- Isolated femoral condyle coronal plane fractures (Hoffa fractures) are rare and difficult to treat surgically.
- Existing classifications inadequately categorize the variable patterns observed on computed tomography (CT).
Purpose of the Study:
- Introduce a novel CT-based classification system for Hoffa fractures.
- Evaluate its utility in guiding treatment and assess its reproducibility.
Main Methods:
- Developed a new classification based on CT analysis of 103 Hoffa fractures (2004-2014).
- Applied the classification to 78 consecutive cases, with treatment guided by the protocol.
- Assessed outcomes using Neer's scoring and International Knee Society Documentation Committee (IKDC) scores.
Main Results:
- 69 of 78 patients achieved excellent outcomes, with satisfactory results in 7 and unsatisfactory in 2.
- Simple fracture patterns yielded uniformly excellent results.
- Comminuted fractures, particularly those involving the posterior cortex and articular surface, had less favorable outcomes.
Conclusions:
- Therapeutic outcomes are significantly influenced by articular and posterior cortex comminution, anatomical reduction, and stable fixation.
- Pre-operative classification and treatment guidelines predict outcomes, minimize complications, and aid surgical planning.
- The new classification demonstrates good interobserver reliability.
Introduction:
Isolated fracture of femoral condyle in the coronal plane (Hoffa fracture) is rare and surgically challenging to treat. The purpose of this study is to introduce a new classification for this fracture, evaluating its utility in treatment guidelines and its reproducibility.
Materials And Methods:
103 patients with Hoffa fracture were operated in our tertiary care centre from 2004 to 2014. Computed tomography (CT) was done in all cases preoperatively. Many fractures had variable patterns which could not be defined and categorized as per Letennuer's classification. A pilot study with first 25 cases were analysed and certain morphological fracture patterns were observed in CT. The fixation methods and failure models were also noted. This resulted in development of a new classification specifying the fracture patterns and the preferred fixation methods for a better outcome. Next 78 consecutive fractures were then classified preoperatively as per our CT classification and treatment executed according to the protocol. Outcomes were measured using Neer's scoring system and International Knee Society Documentation Committee (IKDC) Functional Score.
Results:
Out of 78 patients, 69 had excellent outcome, 7 had satisfactory and 2 had unsatisfactory outcome which corresponded with the specified fracture severity pattern. Uniformly excellent results were obtained in all simple pattern fractures, whereas comminuted fractures especially posterior cortex comminution and articular comminution yielded less favourable outcomes.
Conclusion:
We conclude that therapeutic outcome is significantly affected by articular comminution, posterior cortex comminution, achieving anatomical reduction and stable fixation. Pre-operative fracture classification and treatment guidelines gives a predictable outcome with least complications and has good interobserver reliability thus instrumental in surgical planning.
Level Of Evidence:
III.
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