Comparison of soft tissue response in rabbits following laryngeal implantation with hydroxylapatite, silicone rubber, and teflon

Paul Flint, Russell L. Corio, Charles W. Cummings

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

This study evaluates the soft tissue response in rabbits following laryngeal implantation for medialization using hydroxylapatite prostheses, carved silicone rubber prostheses, and injectable Teflon. Sixteen rabbits underwent left recurrent laryngeal nerve section for denervation and laryngeal implantation with hydroxylapatite. At 1, 3, 6, and 12 months, 4 animals were painlessly sacrificed and processed for histology. Similarly, animals were implanted with carved silicone rubber prostheses or with Teflon injected through a flap in the thyroid lamina for comparison at 1,3, and 6 months. In animals implanted with hydroxylapatite, histologic findings include limited acute inflammatory response, thin fibrous encapsulation, and osteogenesis in the region of the fenestra, with lamellar bone bridging the space between the implant and thyroid lamina. With silicone rubber prostheses, there is a limited inflammatory response and fibrous encapsulation of the implant without evidence of osteogenesis. Animals implanted with Teflon demonstrated a classic foreign body reaction with multinucleated giant cells, granuloma formation, and migration of Teflon into surrounding muscle. With respect to soft tissue response, both hydroxylapatite and silicone robber are less reactive than Teflon. The osteogenesis observed in the presence of hydroxylapatite increases implant stability and minimizes the risk of migration. Conversely, the presence of bone growth may limit the reversibility of medialization procedures performed with hydroxylapatite.

Original languageEnglish (US)
Pages (from-to)399-407
Number of pages9
JournalAnnals of Otology, Rhinology and Laryngology
Volume106
Issue number5
StatePublished - 1997
Externally publishedYes

Fingerprint

Silicone Elastomers
Polytetrafluoroethylene
Durapatite
Rabbits
Prostheses and Implants
Osteogenesis
Thyroid Gland
Giant Cell Granuloma
Foreign-Body Reaction
Recurrent Laryngeal Nerve
Bone Development
Denervation
Silicones
Giant Cells
Histology
Bone and Bones
Muscles
Injections

Keywords

  • histology
  • hydroxylapatite
  • laryngeal implants
  • silicone rubber
  • Teflon
  • thyroplasty
  • vocal fold paralysis

ASJC Scopus subject areas

  • Otorhinolaryngology

Cite this

Comparison of soft tissue response in rabbits following laryngeal implantation with hydroxylapatite, silicone rubber, and teflon. / Flint, Paul; Corio, Russell L.; Cummings, Charles W.

In: Annals of Otology, Rhinology and Laryngology, Vol. 106, No. 5, 1997, p. 399-407.

Research output: Contribution to journalArticle

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