|Year : 2013 | Volume
| Issue : 2 | Page : 173-176
Use of anteriolateral wall of maxilla for reconstruction of orbital floor fracture: A clinical study
Anshul Rai1, Abhay Datarkar2
1 Department of Oral and Maxillofacial Surgery, Rishiraj Dental College, Bhopal, Madhya Pradesh, India
2 Department of Oral and Maxillofacial Surgery, Sharad Pawar Dental College, Wardha, Nagpur, Maharashtra, India
|Date of Web Publication||21-Feb-2014|
118, Reveira Towne, Near Mata Mandir, Bhopal - 462 001, Madhya Pradesh
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Purpose: The aim of the present study was to assess the utility of anterolateral wall of maxilla as a bone graft to reconstruct the continuity of orbital floor. Materials and Methods : This study was carried out at Datarkar Institute of Maxillofacial Surgery, Pratap Nagar, Nagpur. Out of five patients selected, three were male and two were female. All the patients had intact anterolateral wall of maxilla on contralateral side. In all the patients the reduction of the zygomatic complex fracture was done by Keen's approach. The fractures were stabilized by miniplates. From the contralateral sides,bone graft of 1.5 × 2 cm size was harvested from which were intact in all the patients. All the patients were reviewed at regular interval, initially once every week for 1 month, followed by once in every month for next 6 months postoperatively. Results: Five patients with orbital floor defects of medium size average 1.16 cm size (range 0.8-1.5 cm) were grafted by using autogenous bone graft harvested from anterolateral wall of maxilla. All the patients were successfully reconstructed with restoration of the orbital wall continuity. We have not come across any complications like infection, exposure, and extrusion of the graft. Only one patient did not show much improvement in enopthalmous where the size of the defect was large. Conclusions: The use of harvested bone graft from the anterolateral wall of the maxilla is better option for the reconstruction of orbital floor defects.
Keywords: Anetriolateral wall of maxilla, autogenous graft, orbital floor reconstruction
|How to cite this article:|
Rai A, Datarkar A. Use of anteriolateral wall of maxilla for reconstruction of orbital floor fracture: A clinical study. Natl J Maxillofac Surg 2013;4:173-6
|How to cite this URL:|
Rai A, Datarkar A. Use of anteriolateral wall of maxilla for reconstruction of orbital floor fracture: A clinical study. Natl J Maxillofac Surg [serial online] 2013 [cited 2021 Jul 30];4:173-6. Available from: https://www.njms.in/text.asp?2013/4/2/173/127646
| Introduction|| |
Trauma to the orbit can result in considerable deformity of the face, but can also result in impairment of the vision. Such kind of trauma may occur in various blunt injuries due to road traffic accidents (RTAs), assault, and sport activity. A true blowout fracture of the orbit involves only the floor of the orbit without involvement of orbital rim or any other associated facial bones. It can also be found in association with multiple facial injuries.  Significant complications can occur as a result of these orbital injuries such as enophthalmos, persistent diplopia, vertical dystopia, and restriction of globe movements.
The goal of surgical repair of orbital fractures is to restore the traumatized wall to prevent herniation of the contents of the globe into the maxillary sinus, as it causes undesirable fat atrophy, disturbance in the ocular motility, and related complication.  Various autogenous, alloplastic, and allogenic materials have been tried to reconstruct the orbital floor with varying rate of success.
This study was conducted to use an alternative source of autogenous bone graft, with the specific aim to see the efficacy of anterolateral wall maxilla in orbital floor reconstruction. The aim of this paper is to present an alternative source of bone for use in grafting orbital floor defects. We are presenting management of orbital floor fracture compounded with zygomatico-maxillary complex fracture using anterolateral wall of maxilla as bone graft and mini plates for fixation of facial fracture.
| Subjects and Methods|| |
This study was carried out at Datarkar Institute of Maxillofacial Surgery, Pratap Nagar, Nagpur. Informed consent has been taken from all the patients after explaining the advantages and disadvantages of orbital floor reconstruction. Total of five patients reported with history of RTA having facial fractures associated with orbital wall disruption were included in the study. Ethical approval was taken before study planning. Out of five patients selected, three were male and two were female having varied presentation of facial asymmetry, diplopia, decreased extraoccular movements, and enopthalmous. All the patients had intact anterolateral wall of maxilla on contralateral side. Patients were preoperatively examined clinically and evaluated by computed tomography (CT) scan to see the size of the defect [Figure 1]. Forced duction taste was performed to check restricted eyeball movement.
|Figure 1: Preoperative computed tomography (CT) showing orbital floor fracture with herniation of contents|
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Subciliary incision was used to address orbital rim and floor of orbit. Careful dissection was carried out and the defect in the floor was visualized. In all the patients the reduction of the zygomatic complex fracture was done by Keen's approach. The fractures were stabilized by miniplates. From the contralateral sides [Figure 2], bone graft [Figure 3] of 1.5 × 2 cm size was harvested from which were intact in all the patients. Periorbital tissue herniating in the maxillary sinus was disengaged from bony defect and the harvested graft was adapted to the orbital floor [Figure 4]. Closure done in layers after achieving hemostasis. Postoperative recovery was uneventful. Immediate improvement in the facial asymmetry, diplopia, and enopthalmous was observed. All the patients were reviewed at regular interval, initially once every week for 1 month, followed by once in every month for next 6 months postoperatively.
| Results|| |
Five patients [Table 1] with orbital floor defects of medium size average 1.16 cm size (range 0.8-1.5 cm) were grafted by using autogenous bone graft harvested from anterolateral wall of maxilla. The average follow-up in this study was 6 months (range 5-0 months). All the patients were successfully reconstructed with restoration of the orbital wall continuity. We have not come across any complications like infection, exposure, and extrusion of the graft. The postoperative CT scan showed good consolidation [Figure 5] of the graft maintaining the continuity of the orbital floor. The patients suffering from diplopia also showed significant improvement postoperatively. Only one patient did not show much improvement in enopthalmous where the size of the defect was large.
|Figure 5: Postoperative CT showing consolidated bone graft at orbital floor|
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| Discussion|| |
The outcome of repair of orbital floor fracture depends upon proper diagnosis, timing of surgery, appropriate surgical approach, and selection of suitable graft.
Unrepaired orbital wall defects after facial fractures can result in enopthalmous and diplopia because of increased orbital volume, herniation of orbital contents, and atrophy of herniated fat and muscle. Therefore, reconstruction of orbital floor is necessary procedure. 
The timing for orbital floor fracture repair is controversial. Proper surgical timing is a paramount for producing good results, and most of the authors advocate early repair as late treatment would lead to fat atrophy and fibrosis of supporting ligaments.  This may limit the surgeon's ability to completely correct the enopthalmous as well as the position of the globe. 
The basic objective of reconstruction of orbital defect is to restore orbital volume, function, and esthetics.  Orbital floor reconstruction has been achieved using a wide variety of materials which includes cartilage and fascia homograft (autogenous bone graft (Converse, et al., 1961), and alloplastic materials (Borghouts and Otto, et al., 1978). Autogenous graft is a well-established and relatively successful method of repairing orbital defects.  Very few cases of use of anterolateral wall of maxilla as a bone graft for reconstruction of orbital defects has been reported in the literature.
The use of anterolateral wall of maxilla is an easy quicker method of harvesting bone graft. The procedure is done intraorally without any extraoral scar and no donor site morbidity. About 2 × 3 cm of the graft can be harvested which is sufficient for smaller to moderate size defects. Harvesting of the graft is associated with minimal complication and most common amongst them is perforation in maxillary sinus, which subsequently heals uneventfully. Bleeding from the nose is expected during initial 10 days of surgery which itself is collected blood in the antrum after harvesting bone graft.
In the present study it was also observed that the contour of anterolateral wall of maxilla exactly fits the anatomic contour of orbital floor. Several authors reported that membranous bone grafts maintain their volume to a greater extent compared with endochondral bone grafts. ,, The reason for that could be bone grafts of membranous origin have higher cortical bone quality than those of endochondral origin. Moreover, some other authors observed that cortical bone grafts will maintain their volume better than cancellous bone grafts, independent of embryogenic origin. ,
Zins and Whitaker  found that membranous bone grafts maintain their volume better than endochondral bone grafts when grafted on the rabbit snout. They hypothesized that this was because of the embryologic origin of the bone graft. Using a similar animal model, they found that membranous bone grafts maintained their volume better than endochondral grafts, and they explained this phenomenon by earlier graft revascularization.
In addition to differences in embryologic origin, endochondral and membranous bone grafts also differ in their micro architecture. Membranous bone tends to have a thicker cortex and a denser, thinner cancellous layer than endochondral bone. Several authors have theorized that a difference in micro architecture is the basis for the differential resorption of bone grafts. ,, This technique provides a readily accessible, easily harvested source of bone for grafting orbital floor defects.
Patient acceptibility is very good and ease of intraoral surgery reduces the operating time, postoperative morbidity at donor site is minimal. The graft can be harvested in those patients where contralateral side is normal.
| Conclusion|| |
The use of harvested bone graft from the anterolateral wall of the maxilla is better option for the reconstruction of orbital floor defects. The clinical and radiographic observations showed a very low rate of bone resorption and significant improvement in diplopia and correction of continuity of orbital floor defect. Therefore, on the basis of this study, authors feel that the membranous origin of the bone from anterolateral wall of maxilla is a good source for reconstruction of moderate size orbital floor defects.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]