lateral orbital tubercle

(redirected from Whitnall's tubercle)

tubercle, lateral orbital 

A small elevation on the orbital surface of the zygomatic bone just behind and within the orbital margin, about 11 mm below the frontozygomatic suture. It serves as an attachment for the check ligament of the lateral rectus muscle, the lateral palpebral ligament, the suspensory ligament of Lockwood and the levator palpebrae superioris muscle. Syn. Whitnall's tubercle. See ligament of Lockwood; palpebral ligament.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
distance between the Whitnall's tubercle and the base of the metoptic canal,
The average distances from the frontozygomatic suture, superior aspect of the superior orbital fissure, Whitnall's tubercle, superior aspect of the optic canal, and superior aspect of the supraorbital notch to the metoptic canal were 29.51 [+ or -] 11.20, 15.80 [+ or -] 4.26, 22.85 [+ or -] 9.95, 8.90 [+ or -] 2.74, and 40.62 [+ or -] 8.87 mm in the right side, respectively.
For this analysis, we used various reference points; frontozygomatic suture, superior aspect of the superior orbital fissure, Whitnall's tubercle, superior aspect of the optic canal, and superior aspect of the supraorbital notch to the metoptic canal were measured at 29.51 [+ or -] 11.20, 15.80 [+ or -] 4.26, 22.85 [+ or -] 9.95, 8.90 [+ or -] 2.74, and 40.62 [+ or -] 8.87 mm in the right side, respectively, and 27.98 [+ or -] 5.67, 15.98 [+ or -] 3.42, 21.66 [+ or -] 4.77, 9.21 [+ or -] 2.42, and 42.24 [+ or -] 12.77 mm in the left side, respectively We statistically analyzed these measurements according to the sides.
There is a labyrinth of connective tissues attached to Whitnall's tubercle and as patients age, there is laxity of the septum, retinaculum, and orbicularis; rounding of the lateral canthal angle; and a negative intercanthal tilt that develops as the lateral canthus drops in relation to the medial canthus, said Dr.
"This can occasionally be from failure of the reconstructed or plicated lateral canthal tendon, but this is a very robust structure, and when properly fixated to the periosteum of Whitnall's tubercle, failure is unlikely," Dr.
The lower canthal tendon is then suspended to the periosteum over Whitnall's tubercle with a 4-0 polydioxanone or 4-0 Mersilene suture (figure 1, C).
Slight asymmetry in two sides was present at the frontal eminence, porion, gonion, zygion, and Whitnall's tubercle (outer canthus), where left measurements were slightly greater than were those of the right.
In addition to the anatomical points evaluated in other studies, this study evaluated additional points, vertex, opisthocranion, inion, porion, and Whitnall's tubercle (outer canthus), which will help in three-dimensional facial reconstruction.