Abstract
In patients treated by orbital wall decompression for endocrine orbitopathy (EO) there
is limited evidence on the effect of orbital wall resections. Thus, the aim of this
study was to evaluate the effect of one, two, and three-wall resections on orbital
parameters to determine if any such correlations exist. Preoperative and postoperative
data from all patients at a tertiary care centre who underwent decompression surgery
from 2010 - 2020 were digitally analysed. The effect of the number and area of resected
walls on orbital area, orbital volume, and Hertel value, and the effect of lateral
rim advancement (LARA) were determined. A total of 131 orbital areas showed an increase
from a mean (SD) preoperative area of 42.0 (4.6) cm2 to 47.3 (6.1) cm2 postoperatively (p<0.001). In total, the mean (SD) area of osseous wall removed in
all patients was 6.2 (1.7) cm2 at the lateral orbit (n = 129), 6.7 (2.3) cm2 at the orbital floor (n = 123), and 5.8 (1.8) cm2 at the medial orbital wall (n =30). The mean (SD) orbital volume increased by 6.0
(3.0) cm3 after decompression. There was also a significant reduction in exophthalmos of 7.3
(3.2) mm (from 25.2 (3.9) to 17.9 (3.5), p<0.001). LARA was performed in 50 patients.
Changes in volume and area, and reduction in exophthalmos were not significantly different
with or without LARA. The postoperative effects of orbital wall resection are predictable
and exhibit a relation with six units of change. Two-wall resection is the most common
intervention.
Keywords
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Article Info
Publication History
Published online: December 06, 2021
Accepted:
October 30,
2021
Received:
July 13,
2021
Identification
Copyright
© 2021 Published by Elsevier Ltd on behalf of The British Association of Oral and Maxillofacial Surgeons.