Certain laceration characteristics cause abnormal hypertrophic scarring
Evidence consistently shows that specific laceration and wound characteristics—such as depth into the reticular dermis, mechanical tension, and local microenvironment alterations—are key drivers in the development of abnormal hypertrophic scarring.
The claim posits that certain laceration characteristics cause abnormal hypertrophic scarring. Multiple high-quality reviews and clinical studies (e.g., [0], [2], [4], [6], [7], [11]) confirm that wound characteristics such as depth of injury (reaching the reticular dermis), mechanical tension, anatomical location, and local inflammation are major risk factors determining whether a wound develops into a hypertrophic scar. There is no evidence refuting this relationship. Therefore, the verdict is SUPPORTED.
Mélanie Rodrigues, Nina Kosaric, Clark A. Bonham, Geoffrey C. Gurtner. Wound Healing: A Cellular Perspective. 2018. https://doi.org/10.1152/physrev.00067.2017
Paper [0] notes that alterations in mechanical forces and the local microenvironment directly impact cellular activation, leading to impaired healing such as hypertrophic scarring.
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Gerd G. Gauglitz, Hans Christian Körting, T. Pavicic, Thomas Ruzicka, Marc G. Jeschke. Hypertrophic Scarring and Keloids: Pathomechanisms and Current and Emerging Treatment Strategies. 2010. https://doi.org/10.2119/molmed.2009.00153
Paper [2] establishes that excessive scars arise following insults to the deep dermis due to aberrations in physiologic wound healing.
Rei Ogawa. Keloid and Hypertrophic Scars Are the Result of Chronic Inflammation in the Reticular Dermis. 2017. https://doi.org/10.3390/ijms18030606
Paper [4] demonstrates that superficial injuries not reaching the reticular dermis never cause hypertrophic scarring, confirming that injury depth and cutaneous characteristics dictate scar pathology.
Rei Ogawa. The Most Current Algorithms for the Treatment and Prevention of Hypertrophic Scars and Keloids: A 2020 Update of the Algorithms Published 10 Years Ago. 2021. https://doi.org/10.1097/prs.0000000000008667
Paper [6] identifies local risk factors such as tension on the wound that promote hypertrophic scar growth.
Ezio Nicola Gangemi, Darío Gregori, Paola Berchialla, E. Zingarelli, Monica Cairo, Daniele Bollero, Jamal Ganem, Roberto Capocelli, F Cuccuru, Pompeo Cassano, Daniela Risso, Maurizio Stella. Epidemiology and Risk Factors for Pathologic Scarring After Burn Wounds. 2008. https://doi.org/10.1001/archfaci.10.2.93
Paper [7] identifies independent clinical risk factors—including burn depth, anatomical site, and surgical procedures—that drive postburn pathologic scarring.
Chun-Shin Chang, Christopher Glenn Wallace, Yen-Chang Hsiao, Chee‐Jen Chang, Philip Kuo-Ting Chen. Botulinum Toxin to Improve Results in Cleft Lip Repair: A Double-Blinded, Randomized, Vehicle-Controlled Clinical Trial. 2014. https://doi.org/10.1371/journal.pone.0115690
Paper [11] shows that reducing wound tension via botulinum toxin improves facial scar quality, illustrating how physical characteristics of the wound environment influence scar formation.
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