Related Experiment Video
Updated: Feb 11, 2026

Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
Published on: April 21, 2021
Pediatric Frontalis Suspension With Braided Polyester: A Comparison of Two Techniques
Insights
Braided polyester is a safe and effective material for frontalis suspension surgery in managing severe ptosis. The base-down triangle technique showed better results than the Fox pentagon technique.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Ophthalmic Surgery
Background:
- Severe or recurrent ptosis in children and young adults requires effective management.
- Frontalis suspension is a common surgical technique for ptosis correction.
- Material choice for frontalis suspension impacts surgical outcomes and cost.
Purpose of the Study:
- To evaluate the benefits of braided polyester for frontalis suspension in severe ptosis.
- To compare the efficacy of two surgical techniques: base-down triangle and Fox pentagon.
- To assess the safety and effectiveness of braided polyester sling material.
Main Methods:
- Retrospective review of 30 patients (43 eyelid procedures) with severe ptosis.
- Frontalis suspension using braided polyester via closed technique.
- Comparison of base-down triangle and Fox pentagon techniques.
Main Results:
- Functional success (visual axis clearing) achieved in 39 of 43 procedures.
- Significant improvements in Marginal Reflex Distance and vertical palpebral fissure height observed.
- The base-down triangle technique demonstrated superior outcomes compared to the Fox pentagon technique.
Conclusions:
- Braided polyester is a safe, effective, easy-to-handle, and low-cost material for frontalis suspension.
- Consideration of braided polyester is recommended, particularly in resource-limited settings.
- The base-down triangle technique appears more effective than the Fox pentagon technique for ptosis management.
Purpose:
To demonstrate the benefits of using braided polyester in the management of severe or recurrent ptosis in children and young adults and to compare the efficacy of two surgical techniques.
Methods:
Retrospective, non-randomized record review of 30 patients (43 eyelid procedures) affected by congenital or acquired severe ptosis who underwent frontalis suspension with braided polyester from 2008 to 2016. Two surgical techniques were compared: the base-down triangle and the Fox pentagon, both of which were performed using a closed technique. Functional success was defined as clearing of the visual axis. Complications and results were examined.
Results:
Functional success was obtained in 39 eyes of 43 procedures. Marginal reflex distance increased an average of 2.51 mm with the base-down triangle technique and 1.70 mm with the Fox pentagon technique (P = .05). The vertical palpebral fissure height increased an average of 4.60 mm with the base-down triangle technique and 2.45 mm with the Fox pentagon technique (P < .001). Mean follow-up duration was 38.6 months. Complications included untied suture (n = 2), suture dehiscence (n = 1), cellulitis (n = 2), and granuloma (n = 1).
Conclusions:
Braided polyester was found to be a safe, effective, easy-to-handle, and low-cost sling material for frontalis suspension and should be considered for clinical use, especially in developing countries where the cost and availability of other materials represents a significant barrier to treatment. In the authors' experience, the base-down triangle technique appeared superior to the Fox pentagon technique. [J Pediatr Ophthalmol Strabismus. 2018;55(4):229-233.].
Related Concept Videos
Types of Step-Growth Polymers: Polyesters
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Colloids and Suspensions
Multiple Comparison Tests
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...
Pharmacokinetics in Pediatric Patients: Drug Excretion
Evolutionary Relationships through Genome Comparisons

