Inferior Oblique Myectomy, Disinsertion, and Recession in Rhesus Monkeys

Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy

“…[5] For secondary IOOA, a successful result was reported in 72% of patients. Similarly, Duranglu [2] reported a success rate of 73.6% in the disinsertion group of patients with infantile esotropia and primary IOOA. [13] Our findings are also in line with previous findings of Sanjari et al, who compared three surgical procedures for the treatment of IOOA, including disinsertion, myectomy, and anterior transposition.…”

“…In our study, the amount of preoperative hypertropia in the primary position and adduction was similar in both groups; therefore, the similar corrective effect of both surgical methods could be due to the same effect on the function of the inferior rectus muscle. Wertz et al [2] studied the muscle length shortening following IO myectomy and disinsertion surgery in Rhesus monkeys. They observed a wide variation in the IO reattachment site.…”

Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy

“…[5] For secondary IOOA, a successful result was reported in 72% of patients. Similarly, Duranglu [2] reported a success rate of 73.6% in the disinsertion group of patients with infantile esotropia and primary IOOA. [13] Our findings are also in line with previous findings of Sanjari et al, who compared three surgical procedures for the treatment of IOOA, including disinsertion, myectomy, and anterior transposition.…”

“…In our study, the amount of preoperative hypertropia in the primary position and adduction was similar in both groups; therefore, the similar corrective effect of both surgical methods could be due to the same effect on the function of the inferior rectus muscle. Wertz et al [2] studied the muscle length shortening following IO myectomy and disinsertion surgery in Rhesus monkeys. They observed a wide variation in the IO reattachment site.…”

Reunion of the Rabbit Superior Oblique Tendon After Weakening Procedures

“…Buckley and Flynn7 reported that there were similar surgical results and postoperative complications between SO recession and tenotomy. Similarly, Wertz et al29 reported that disinsertion or myectomy of the inferior oblique (IO) muscle in Rhesus monkeys demonstrated only half of the shortening effect shown by the recession of the IO muscle. In these experiments, the authors inferred that recession of the IO muscle was a better operation, as disinsertion and myectomy demonstrated a more uneven and wider variation in the new insertion site of the IO muscle.…”

Inadvertent inferior oblique extirpation during orbital decompression

“…Spontaneous reattachment of disinserted IO muscle has previously been reported. In one study, IO myectomy and disinsertion were performed on primates 7 in whom all the IO oblique muscles spontaneously reattached themselves to the sclera, even though the site of reattachment varied widely, ranging from the original insertion site to other areas adjacent to the lateral rectus or inferior rectus insertions. Furthermore, Yoo et al 8 demonstrated selfgrading effect of IO recession (for congenital superior oblique palsy); the greater the preoperative hyperdeviation, the larger the postoperative correction.…”

Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy

“…[5] For secondary IOOA, a successful result was reported in 72% of patients. Similarly, Duranglu [2] reported a success rate of 73.6% in the disinsertion group of patients with infantile esotropia and primary IOOA. [13] Our findings are also in line with previous findings of Sanjari et al, who compared three surgical procedures for the treatment of IOOA, including disinsertion, myectomy, and anterior transposition.…”

“…In our study, the amount of preoperative hypertropia in the primary position and adduction was similar in both groups; therefore, the similar corrective effect of both surgical methods could be due to the same effect on the function of the inferior rectus muscle. Wertz et al [2] studied the muscle length shortening following IO myectomy and disinsertion surgery in Rhesus monkeys. They observed a wide variation in the IO reattachment site.…”

Reunion of the Rabbit Superior Oblique Tendon After Weakening Procedures

“…Buckley and Flynn7 reported that there were similar surgical results and postoperative complications between SO recession and tenotomy. Similarly, Wertz et al29 reported that disinsertion or myectomy of the inferior oblique (IO) muscle in Rhesus monkeys demonstrated only half of the shortening effect shown by the recession of the IO muscle. In these experiments, the authors inferred that recession of the IO muscle was a better operation, as disinsertion and myectomy demonstrated a more uneven and wider variation in the new insertion site of the IO muscle.…”

Inadvertent inferior oblique extirpation during orbital decompression

“…Spontaneous reattachment of disinserted IO muscle has previously been reported. In one study, IO myectomy and disinsertion were performed on primates 7 in whom all the IO oblique muscles spontaneously reattached themselves to the sclera, even though the site of reattachment varied widely, ranging from the original insertion site to other areas adjacent to the lateral rectus or inferior rectus insertions. Furthermore, Yoo et al 8 demonstrated selfgrading effect of IO recession (for congenital superior oblique palsy); the greater the preoperative hyperdeviation, the larger the postoperative correction.…”

Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy

“…[5] For secondary IOOA, a successful result was reported in 72% of patients. Similarly, Duranglu [2] reported a success rate of 73.6% in the disinsertion group of patients with infantile esotropia and primary IOOA. [13] Our findings are also in line with previous findings of Sanjari et al, who compared three surgical procedures for the treatment of IOOA, including disinsertion, myectomy, and anterior transposition.…”

“…In our study, the amount of preoperative hypertropia in the primary position and adduction was similar in both groups; therefore, the similar corrective effect of both surgical methods could be due to the same effect on the function of the inferior rectus muscle. Wertz et al [2] studied the muscle length shortening following IO myectomy and disinsertion surgery in Rhesus monkeys. They observed a wide variation in the IO reattachment site.…”

Reunion of the Rabbit Superior Oblique Tendon After Weakening Procedures

“…Buckley and Flynn7 reported that there were similar surgical results and postoperative complications between SO recession and tenotomy. Similarly, Wertz et al29 reported that disinsertion or myectomy of the inferior oblique (IO) muscle in Rhesus monkeys demonstrated only half of the shortening effect shown by the recession of the IO muscle. In these experiments, the authors inferred that recession of the IO muscle was a better operation, as disinsertion and myectomy demonstrated a more uneven and wider variation in the new insertion site of the IO muscle.…”

Inadvertent inferior oblique extirpation during orbital decompression

“…Spontaneous reattachment of disinserted IO muscle has previously been reported. In one study, IO myectomy and disinsertion were performed on primates 7 in whom all the IO oblique muscles spontaneously reattached themselves to the sclera, even though the site of reattachment varied widely, ranging from the original insertion site to other areas adjacent to the lateral rectus or inferior rectus insertions. Furthermore, Yoo et al 8 demonstrated selfgrading effect of IO recession (for congenital superior oblique palsy); the greater the preoperative hyperdeviation, the larger the postoperative correction.…”