Change in the Location of the Optic Strut Relative to the Anterior Clinoid Process Pneumatization

Adanir S. S., Ceylan E. S., Inceoglu A., Beger O., BAHŞİ İ., ORHAN M., ...More

JOURNAL OF CRANIOFACIAL SURGERY, vol.33, no.6, pp.1924-1928, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 6
  • Publication Date: 2022
  • Doi Number: 10.1097/scs.0000000000008707
  • Journal Name: JOURNAL OF CRANIOFACIAL SURGERY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, MEDLINE
  • Page Numbers: pp.1924-1928
  • Keywords: Anterior clinoid process, anterior clinoidectomy, cone-beam computed tomography, optic strut, pneumatization, MICROSURGICAL ANATOMY, NERVE DECOMPRESSION, SPHENOID SINUS, PRECHIASMATIC SULCUS, COMPUTED-TOMOGRAPHY, SURGICAL ANATOMY, MORPHOMETRY, EXPOSURE, ANEURYSM
  • Dokuz Eylül University Affiliated: Yes

Abstract

Objective: This study aimed to peruse the alteration of the position of the optic strut (OS) according to the anterior clinoid process (ACP) pneumatization. Methods: This retrospective study conducted on cone-beam computed tomography images of 400 patients with a mean age of 36.49 +/- 15.91 years. Results: Anterior clinoid process length, width, and angle were measured as 10.56 +/- 2.42 mm, 5.46 +/- 1.31 mm, and 42.56 +/- 14.68 degrees, respectively. The tip of ACP was measured as 6.60 +/- 1.50 mm away from the posterior rim of OS. In the 631 sides (78.87%) did not have ACP pneumatization. In the cases with ACP pneumatization, three different configurations were identified as follows: Type 1 in 71 sides (8.87%), Type 2 in 56 sides (7%), and Type 3 in 42 sides (5.23%). Relative to ACP, the location of OS was determined as follows: Type A in 29 sides (3.64%), Type B in 105 sides (13.12%), Type C in 344 sides (43%), Type D in 289 sides (36.12%), and Type E in 33 sides (4.12%). The spread of data related to the attachment site of OS according to the presence or absence of ACP pneumatization showed that the location of OS was affected by ACP pneumatization (P<0.001). In ACPs with pneumatization, the frequency of OS position relative to ACP was found as follows: Type A in none of sides (0%), Type B in 8 sides (7.6%), Type C in 53 sides (15.4%), Type D in 88 sides (30.4%), and Type E in 20 sides (60.6%). Conclusions: The main finding of this study was that the location of OS relative to ACP was affected by ACP pneumatization. In ACPs with pneumatization, OS was located more posteriorly compared with ACPs without pneumatization.