Skip Navigation LinksHome > January 2014 - Volume 5 - Issue 1 > The use of collagen membranes in management of orbital floor...
Egyptian Journal of Oral & Maxillofacial Surgery:
doi: 10.1097/01.OMX.0000438041.29196.b5
Clinical Papers

The use of collagen membranes in management of orbital floor fracture

Wahdan, Wessam Sameera; Sleem, Heba Abdulwahedb

Free Access
Article Outline
Collapse Box

Author Information

aDepartment of Plastic Surgery, Faculty of Medicine, Cairo University

bDepartment of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ain Shams University, Egypt

Correspondence to Heba Abdulwahed Sleem, MD, Phd, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ain Shams University, Abbasya Square, Cairo, Egypt. Tel: +01001942251;e-mail:tarek_elzayat1959@yahoo.com

Received August 28, 2013

Accepted October 30, 2013

Collapse Box

Abstract

Orbital floor fractures account for the majority of all traumas involving the middle third of the face. The aim of the treatment in those patients is to free orbital contents, restore floor continuity, and minimize soft tissue fibrosis. Different materials have been tested over the years; however, none of those materials fulfil the ideal requirements of the graft, which necessitates continuous search for a new material. Bovine collagen membrane has been successfully used in oral surgery and wound care. The present study was designed to investigate the use of collagen membrane in the treatment of orbital floor fracture.

Back to Top | Article Outline

Introduction

Orbital floor fracture either isolated (about 40% of cases) or combined with zygomaticomaxillary fracture accounts for the majority of all traumas in the head and neck region. Surgery of orbital floor fracture is performed to free incarcerated or prolapsed orbital tissue that causes diplopia and to restore the anatomic skeletal size of the orbit. Nonresolving oculocardiac reflex and early enophthalmos are the indication of immediate surgical intervention 1.

There are great controversies regarding the time of surgical intervention, the approaches, and the grafting material to be used. Until now, there is no agreement regarding the time of intervention or grafting material. At the same time, the size of the orbital floor defect (based on the computed tomographic findings) that is indicated for surgical correction is still controversial 2,3.

Materials used for orbital graft can be divided into autologous, allogeneic, and alloplastic materials. Autogenous graft such as rib graft, iliac crest, or fascia can add to the patient morbidity with variable degree of resorption and increase the operative time. Nonresorbable alloplastic material such as teflon, Medpor may cause late complications such as infection and extrusion, as they remain permanent 4.

Bovine collagen (type I) has reasonable mechanical strength for membrane stabilization using either sutures or resorbable tacks with long resorption time (26–38 weeks), is easily trimmed and adapted, is cell occlusive, and allows nutrients transfer. In addition, it could be used as a single layer or be folded several times to fit into different situations 5.

However, the mechanical support provided by the collagen membrane is questionable especially in comminuted cases.

Back to Top | Article Outline

Aim of the study

The aim of the study was to evaluate whether the collagen membrane is suitable for small (<1 cm2) orbital floor defects.

Back to Top | Article Outline

Patients and methods

In this prospective randomized clinical trial, 20 patients presenting with orbital floor fracture (16 combined with zygomaticomaxillary complex fracture and four patients were with pure orbital floor fracture) were included. The majority of fracture cases (86%) were due to motor vehicle accident, 15 male patients and five female patients. The age ranged from 8 to 40 years, and five pediatric patients were included in the study.

We have used resorbable collagen membrane (Implant Direct Sybron Europe AG, Zurich, Switzerland) made from bovine type I collagen of 0.35 mm thickness and 2×3 cm in size.

All patients have been evaluated clinically and radiographically preoperatively and 6 months postoperatively. Patients with frontal, frontobasal, orbital roof, or medial wall fractures were excluded.

Back to Top | Article Outline

Clinical examination

Clinical evaluation included inspection, palpation, and documentation of hypothesia or anesthesia by infraorbital nerve. Before inclusion to the study, fracture site and size were evaluated using computed tomographies. Field of vision, ocular mobility, exophthalmos, and enophthalmos were examined by ophthalmologist.

Back to Top | Article Outline

Surgical procedure

All patients were operated under general anesthesia within 10 days of trauma using a subciliary approach to access the orbital floor and to free incarcerated orbital tissues. Collagen membrane was then placed to reline the orbital floor (Fig. 1) before the suturing traction test was performed.

Fig. 1
Fig. 1
Image Tools
Back to Top | Article Outline

Results

No intraoperative complications occurred. Slight diplopia occurred immediate postoperatively in one patient and disappeared after 6 months. Hypothesia in the area supplied by infraorbital nerve was reported in two patients. Neither infection nor dehiscence was reported in any treated patients. Ophthalmologically no enophthalmos or exophthalmos was noticed after 6 months (Fig. 2). Radiographic evaluation after 6 months showed evidence of new bone formation without soft tissue being prolapsed (Fig. 3).

Fig. 2
Fig. 2
Image Tools
Fig. 3
Fig. 3
Image Tools
Back to Top | Article Outline

Discussion

Despite great advancement in grafting materials and surgical approaches, there is no ideal graft for orbital floor reconstruction 6,7. In fact, autogenous bone graft plays a major role in comminuted floor reconstruction and is considered as a gold standard. However, it carries many disadvantages and should be limited to comminuted cases. Another treatment option is alloplastic materials, which may be associated with late complications such as infection, as they remain permanent. In addition, it does not favor new bone formation 6,8.

Collagen membrane provides biologically compatible graft, which is highly available, pliable, and can resorb within 24 weeks. It could be used in pediatric population in combination with resorbable bone plate. Collagen membranes could be used as a single layer or be folded to fit into the defect 5,9.

With respect to physical support of the orbital content, it has been found that the weight of the orbital content is around 30 g, which represents minimal force in small-size defect (1 cm2) 10 where collagen membrane could be used safely; however, for larger size defects, the use of collagen membrane is questionable 11.

The ultimate strategy is to use each graft in selected patients, as there is no graft ideal for all patients of orbital floor reconstruction. The selection is influenced by many factors including graft availability, age of the patient, surgeon experience, size of the defect, associated injuries, and financial issues 7,12.

Back to Top | Article Outline

Conclusion

Our data suggest that collagen membranes are suitable for reconstruction of the defects in the orbital floor, which are less than 1 cm2. It provides smooth, pliable foundation for new bone formation at the fracture site. In pediatric population, it provides ideal solution in combination with resorbable bone plates.

Back to Top | Article Outline
Acknowledgements
Conflicts of interest

There are no conflicts of interest.

Back to Top | Article Outline

References

1. Jaquiéry C, Aeppli C, Cornelius P, Palmowsky A, Kunz C, Hammer B.Reconstruction of orbital wall defects: critical review of 72 patients.Int J Oral Maxillofac Surg2007;36:193–199.

2. Carr RM, Mathog RH.Early and delayed repair of orbitozygomatic complex fractures.J Oral Maxillofac Surg1997;55:253–259.

3. Hawes MJ, Dortzbach RK.Surgery on orbital floor fractures. Influence of time of repair and fracture size.Ophthalmology1983;90:1066–1070.

4. Chowdhury K, Krause GE.Selection of materials for orbital floor reconstruction.Arch Otolaryngol Head Neck Surg1998;124:1398–1401.

5. Rothamel D, Schwarz F, Sculean A, Herten M, Scherbaum W, Becker J.Biocompatibility of various collagen membranes in cultures of human PDL fibroblasts and human osteoblast-like cells.Clin Oral Implants Res2004;15:443–449.

6. Rinna C, Ungari C, Saltarel A, Cassoni A, Reale G.Orbital floor restoration.J Craniofac Surg2005;16:968–972.

7. Burnstine MA.Clinical recommendations for repair of isolated orbital floor fractures: an evidence-based analysis.Ophthalmology2002;109:1207–1210.

8. Jordan DR, Onge PS, Anderson RL, Patrinely JR, Nerad JA.Complications associated with alloplastic implants used in orbital fracture repair.Ophthalmology1992;99:1600–1608.

9. Becker ST, Terheyden H, Fabel M, Kandzia C, Möller B, Wiltfang J.Comparison of collagen membranes and polydioxanone for reconstruction of the orbital floor after fractures.J Craniofac Surg2010;21:1066–1068.

10. Birkenfeld F, Steiner M, Kern M, Witlfang J, Möller B, Lucius R, Becker ST.Maximum forces applied to the orbital floor after fractures.J Craniofac Surg2012;23:1491–1494.

11. Haug RH, Nuveen E, Bredbenner T.An evaluation of the support provided by common internal orbital reconstruction materials.J Oral Maxillofac Surg1999;57:564–570.

12. Smith B, Regan WF Jr.Blow-out fracture of the orbit. Mechanism and correction of internal orbital fracture.Am J Ophthalmol1957;44:733–739.

© 2014 Egyptian Associations of Oral and Maxillofacial Surgery

Login

Article Level Metrics