Your Fractures may Heal Late If You Smoke Regularly

Shinbone fractures may become hard to heal if you smoke regularly as it has been found to be one of the factors in the long list of factors that delay fracture healing. The findings of this study are published in the Journal of Orthopaedic Trauma.

In adults, tibia (shinbone) fractures are usually fixed through the surgical implantation of a slender metal rod called an intramedullary nail in the hollow space within the bone. This treatment is generally effective for tibial fractures. However, in 10% to 15% of cases, the bone fails to heal in a timely manner, resulting in a nonunion--or arrested healing.

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‘All patients who have fractures must be provided with smoking cessation support to avoid delayed healing.’

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This is considered a serious complication in the healing of a fracture with major consequences. Patients who experience nonunion can be significantly affected by pain, increased the duration of opioid use, and depression. Medical costs and lost wages are also high, and only about 60% of nonunion patients are able to return to work within one year.

In an interdisciplinary study by Hannah Dailey, assistant professor in the Department of Mechanical Engineering and Mechanics and Ping-Shi Wu, associate professor in the Department of Mathematics, both at Lehigh University, a team of researchers examined 1,003 patient records from a large database compiled by the world's leading experts on nonunion, Dr. Charles Court-Brown and Dr. Margaret McQueen--both of the Royal Infirmary of Edinburgh, Scotland--of patients treated in their trauma center over a 20+ year period: 1985-2007.

The results will be published in the July issue of Journal of Orthopaedic Trauma in a paper called: "Tibial Fracture Nonunion and Time to Healing After Reamed Intramedullary Nailing: Risk Factors Based on a Single-Center Review of 1003 Patients," and co-authored by Katherine A. Wu, a statistics student and President's Scholar at Lehigh, as well as Dr. Court-Brown and Dr. McQueen, of the Department of Orthopaedic Trauma, Royal Infirmary of Edinburgh, University of Edinburgh.

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One surprising result the researchers found was that patients in the middle decades of life, particularly women aged 30-49, seemed to be at increased risk of nonunion.

"This finding does not have a simple, obvious biological explanation, and suggests that there are other factors--such as living environment, employment, activity levels and others--that could be contributing to bone healing in a way that isn't easy to measure," says Dailey.

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Another important result from the study was that smoking significantly delays bone healing.

"We are all familiar with some of the more well-known negative health effects of smoking, but the influence on bone healing is less widely known outside the medical community," says Dailey. "Our study recommended that all fracture patients should be provided with support for smoking cessation to help reduce the risk of complications related to their injury."

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From the study: "Smoking did not increase the risk of nonunion but did significantly extend the median time to union. Nonunion risk also shows a nonlinear trend with age and women in middle adulthood may be at increased risk compared with all other groups. This finding is not explained by the distributions of injury characteristics and suggests that exogenous factors, such as weight-bearing behavior, may have a contributing effect and should be objectively measured in future prospective investigations."

Source-Eurekalert