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The Journal of Bone and Joint Surgery (American) 84:1541-1551 (2002)
© 2002 The Journal of Bone and Joint Surgery, Inc.

Scientific Article

High-Energy Fractures of the Tibial Plateau

Knee Function After Longer Follow-up

Dennis P. Weigel, MD and J. Lawrence Marsh, MD

Investigation performed at the University of Iowa Hospitals and Clinics, Iowa City, Iowa

Dennis P. Weigel, MD
Alexandria Orthopaedic Associates, 1500 Irving Street, Alexandria, MN 56308

J. Lawrence Marsh, MD
University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242. E-mail address for J.L. Marsh: j-marsh{at}uiowa.edu

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. A commercial entity (EBI Medical) paid or directed, or agreed to pay or direct, benefits to a research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

Background: Studies of the long-term outcomes of treatment of fractures of the tibial plateau have included wide mixtures of fracture types and mostly low-energy split and split-depression fractures. The long-term results of treatment of high-energy intra-articular proximal tibial fractures are unknown. The purpose of this study was to assess the function of the knee and the development of arthrosis at a minimum of five years after injury in a consecutive series of patients in whom a high-energy fracture of the tibial plateau had been treated with a uniform technique of external fixation.

Methods: Between July 1988 and December 1994, thirty patients with a total of thirty-one fractures of the tibial plateau were treated with a monolateral external fixator and limited internal fixation of the articular surface. Follow-up data on twenty-four knees in twenty-three patients were obtained at a mean of ninety-eight months. Twenty patients (twenty knees) returned specifically for the study, at which time they completed an Iowa Knee Score questionnaire and a Short Form-36 (SF-36) general health survey, a physical examination was performed, and weight-bearing radiographs were made. The results of the SF-36 evaluations for fourteen patients and the Knee Scores for twelve were compared with those obtained five years previously, at two to four years after the injury.

Results: After healing, no patient required a secondary reconstructive procedure. The range of motion of the knee averaged 3° of extension to 120° flexion, which was an average of 87% of the total arc of the contralateral knee. The average Iowa Knee Score was 90 points (range, 72 to 100 points). For twelve patients, the Iowa Knee Score previously recorded at two to four years averaged 92 points, as did the score at the time of the latest follow-up. Thirteen patients rated their outcome as excellent; six, as good; and three, as fair. Fifteen patients were working, and ten of them were performing strenuous labor. Radiographs showed no evidence of arthrosis in fourteen knees, grade-1 arthrosis in three, grade-2 in three, and grade-3 in two. Compared with the radiographic appearance two to four years after injury, there was no evidence of progression of arthrosis in eighteen knees and one grade of progression in four. The SF-36 subscale scores were similar to those of age-matched controls. The fourteen patients who had previous SF-36 scores had no deterioration of these scores.

Conclusions: Patients with a high-energy fracture of the tibial plateau treated with external fixation have a good prognosis for satisfactory knee function in the second five years after injury. The knee joint cartilage appears to be tolerant of both the injury and mild-to-moderate residual articular displacement, which was associated with a low rate of severe arthrosis.


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