Mechanical resistance of the periorbita and the orbital floor complex—are isolated orbital floor fractures only a soft tissue problem?

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• 作者：F. Birkenfeld¹ ; ^{f.birkenfeld@mkg.uni-kiel.de" class="auth_mail" title="E-mail the corresponding author} ; E. Behrens¹ ; C. Flö ; rke¹ ; M. Rohnen¹ ; H. Wieker¹ ; M. Kern² ; R. Lucius³ ; J. Wiltfang¹
• 关键词：periorbita ; orbital floor fracture ; collagen membrane ; PDS
• 刊名：International Journal of Oral and Maxillofacial Surgery
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：45
• 期：3
• 页码：279-283
• 全文大小：922 K

文摘

The primary aims of orbital floor reconstruction are to prevent enophthalmos and herniation of the orbital contents in order to achieve correct globe position. Theoretically, the mechanical load of the orbital floor is approximately 0.0005 N/mm² (30 g orbital content onto 600 mm² of orbital floor area). Therefore, low mechanical stress from orbital floor reconstruction materials is expected. The periorbita and orbital floor complex (bony orbital floor with periorbita) of 12 human cadavers were investigated for their mechanical resistance to distortion and compared to different absorbable pliable reconstruction materials after modification with pores (Bio-Gide, Creos, and PDS). The human periorbita resistance (approximately 1.4 N/mm²) was comparable to that of the absorbable membranes (Creos, Bio-Gide), and the resistance of PDS (approximately 2.3 N/mm²) was comparable to that of the orbital floor complex. The periorbita has a higher stability than the bony orbital floor. Therefore, in isolated orbital floor fractures with a traumatized bony orbital floor and periorbita, reconstruction of the soft tissue as a periorbita equivalent with a resorbable membrane appears to be adequate to prevent enophthalmos and herniation of the orbital contents.