Socket PTB (Patellar Tendon Bearing) The weight bearing takes place below the patella, at the patellar tendon. The suspension is generated by a belt that is tightened around the distal part of the thigh.

May 31, 2012 · There are variations in PTB design, based on the suspension methods. The traditional PTB socket is suspended through the use of a suprapatellar cuff, which sits above the protruding patella.

Pressure distribution within the socket is an essential component to the comfort and function of the individual using a transtibial prosthesis. Ill-fitting sockets can lead to dermatologic concerns, injury to the limb, and decreased prosthetic utilization.

Transtibial prosthetic sockets are often grouped into patella tendon bearing (PTB) or total surface bearing (TSB) designs, but many variations in rectifications are used to apply these principles to an individual's personalised socket.

Feb 26, 2025 · Patellar Tendon Bearing (PTB) Socket – A popular choice for new amputees, especially in the first year after surgery. It can pressure the leg, restricting blood flow and causing discomfort over time.

THE PATELLAR TENDON-BEARING SOCKET. The patellar tendon-bearing (PTB) socket consists of a laminated or molded plastic socket. To make a PTB socket, an impression taken of the patient's residual limb is modified to achieve an intimate, total-contact fit over the entire surface of the residual limb.

Jul 12, 2016 · The result was the patellar tendon-bearing (PTB) socket design. This design has been used successfully over the past five decades to strategically load the limb in areas that are more pressure tolerant, namely the patellar tendon and medial tibial flare, and relieve the tissue over bony prominences like the tibial crest and head of the fibula.

While there are different options when it comes to prosthetic socket types, most use the PTB SC (Patellar Tendon Bearing Supracondylar) socket for lower-limb amputations. With this type of design, the weight bearing takes place at the patellar …

Aug 1, 2000 · This design was named the patella tendon bearing (PTB) socket. The PTB design was unique during its initial trials because the amputee no longer needed the use of a corset positioned on the thigh to assist in loading; it used a specific weight-bearing shape to accomplish comfortable loading.

From the early 1960s, patellar tendon bearing (PTB) sockets became commonplace—in these designs, the socket is crafted to selectively load areas that are load-tolerant while at the same time offloading regions where applied pressure can be painful.