ACPOC - The Association of Children's Prosthetic-Orthotic Clinics Founded in 1978

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Two Year Case Study of the Silicone Suction Socket (3S) Technique Modified and Designed for the Knee Disarticulation Amputee

Twelve patients have been fit with a silicone suction socket flexible interface with an external laminated knee disarticulation frame socket of both endoskeletal and exoskeletal design. The socket fabrication and design is a modification of the materials and principles utilized in fitting the 3S below knee prosthesis.

The purpose of designing the 3S knee disarticulation/above knee flexible socket was to develop a socket that would eliminate the necessity for prosthetic socks and auxiliary belt suspension, maintain improved suction suspension for children who commonly get into positions of sitting and crawling which causes conventional laminated sockets to displace, and to ease the donning procedures also related to conventional sockets. Fabrication techniques of the 3S knee disarticulation socket have been modified to eliminate the need for the shuttle lock assembly which, if utilized, created the thigh section of an unacceptable cosmetic length. The shuttle lock was replaced with a pin/strap assembly.

Fifteen 3S knee disarticulation/above knee sockets have been provided for both unilateral and bilateral amputees. Parental and patient acceptance to the design is very positive due to the elimination primarily of the need for prosthetic socks and auxiliary belt suspension. 3S socket durability, modifications and socket replacements have been acceptable except in one case.

Shriners Hospital, 1141 W. Madison, Oak Park, IL 60302.