Tensile Strength of Musculoscleral Insertion after Superior Rectus Recession on Rabbit.

Park, Dong Ho; Jung, Nak Hong; Shin, Jae Pil; Kwon, Jung Yoon

Original Article

Journal of the Korean Ophthalmological Society 2004;45(4):675-680.
Published online April 1, 2004.

Tensile Strength of Musculoscleral Insertion after Superior Rectus Recession on Rabbit.

Dong Ho Park, Nak Hong Jung, Jae Pil Shin, Jung Yoon Kwon

¹Department of Ophthalmology, Kyungpook National University College of Medicine, Korea. jykwon@knuh.ac.kr
²Sebit Eye Clinic, Korea.

가토 상직근 후전술 후 시간경과에 따른 근공막 유착력의 변화

박동호 ( Park Dong Ho ) , 정낙홍 ( Jeong Nag Hong ) , 신재필 ( Sin Jae Pil ) , 권정윤 ( Kwon Jeong Yun )

Abstract

PURPOSE
The author performed this experimental study to investigate the changes in the tensile strength of a new insertion following a superior rectus recession in a rabbit's eye. METHODS: Conventional superior rectus muscle recession procedures with the hang-back suture technique were performed on New Zealand white rabbits (body weight 2~3kg), after which the disinsertional force was measured using a digital tension gauge on the 3rd, 5th, and 7th days, and then weekly for up to 8 weeks postoperatively. RESULTS: The postoperative disinsertional forces were as follows: 38.25 +/- 2.75, 165 +/- 31.27, and 167.25 +/- 26.99 g at the 3rd , 5th and 7th days, and 211.00 +/- 25.66, 222.75 +/- 26.66, 255.25 +/- 24.51, 271.50 +/- 38.25, 429.50 +/- 21.14 g at the 2nd, 3rd, 4th, 6th and 8th weeks respectively. The disinsertional forces linearly increased with the postoperative time period and there was a strong correlation with correlation coefficient being 0.903. CONCLUSIONS: We concluded that musculoscleral adhesion with hang-back suture maintained enough strength in early postoperative time period.

Key Words: Disinsertional force;Superior rectus muscle recession