Auricular reconstruction using tissue-engineered alloplastic implants for improved clinical outcomes

Chang Mo Hwang, Bu Kyu Lee, Denethia Green, Seon Yeong Jeong, Gilson Khang, John D. Jackson, Anthony Atala, Sang Jin Lee, James J. Yoo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Background: Alloplastic implants have been used clinically to treat congenital abnormalities and traumatic injuries. However, these implants are often associated with complications, including inflammation, infection, erosion, and dislodgment. To minimize these complications, the authors have developed a system in which tissue-engineered cartilage serves as a shell that entirely covers the implant. This system is designed to improve the structural and functional stability between the implant and recipient tissue. Methods: Chondrocytes isolated from rabbit ear cartilage were expanded in vitro. The cells were mixed with fibrin hydrogel for spray-coating a human ear-shaped implant. The surface of the implant was modified using an oxidizing solution to provide hydrophilic characteristic; thus, the cell-fibrin suspension readily adhered onto the surface of the implants. The engineered cartilage-covered implants were implanted into the dorsal subcutaneous space of athymic mice. Histologic and gross examinations of the implants were performed at 2, 4, 8, and 12 weeks after implantation. Results: None of the engineered cartilage-covered implants showed evidence of skin necrosis, implant exposure, or extrusion (n = 10). However, the control implants developed extensive necrosis following implantation (n = 10). In the experimental group, histologic evaluations showed the formation of neocartilage covering the implants. The presence of sulfated glycosaminoglycans was evident in the engineered cartilage tissue. Conclusions: These results demonstrate that engineered cartilage tissues can be used as a biological cover for an alloplastic implant. This system may improve the structural and functional interactions between the implant and the recipient's tissues and thus enhance the outcome of total auricular reconstruction.

Original languageEnglish
JournalPlastic and Reconstructive Surgery
Volume133
Issue number3
DOIs
StatePublished - Mar 1 2014
Externally publishedYes

Fingerprint

Cartilage
A73025
Fibrin
Necrosis
Ear Cartilage
Hydrogel
Chondrocytes
Nude Mice
Ear
Suspensions
Rabbits
Inflammation
Skin
Wounds and Injuries
Infection

ASJC Scopus subject areas

  • Surgery

Cite this

Auricular reconstruction using tissue-engineered alloplastic implants for improved clinical outcomes. / Hwang, Chang Mo; Lee, Bu Kyu; Green, Denethia; Jeong, Seon Yeong; Khang, Gilson; Jackson, John D.; Atala, Anthony; Lee, Sang Jin; Yoo, James J.

In: Plastic and Reconstructive Surgery, Vol. 133, No. 3, 01.03.2014.

Research output: Contribution to journalArticle

Hwang, Chang Mo ; Lee, Bu Kyu ; Green, Denethia ; Jeong, Seon Yeong ; Khang, Gilson ; Jackson, John D. ; Atala, Anthony ; Lee, Sang Jin ; Yoo, James J. / Auricular reconstruction using tissue-engineered alloplastic implants for improved clinical outcomes. In: Plastic and Reconstructive Surgery. 2014 ; Vol. 133, No. 3.
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