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September 30, 2025

The effect of microprocessor-controlled and mechanical knee joint prostheses on mobility and quality of life in unilateral transfemoral amputees

Key Points

Mobility scores were significantly higher for participants using microprocessor-controlled prostheses compared to mechanical ones.
Using the PLUS-M criteria, mobility improvement was notably recorded in those with microprocessor-controlled knees.
Quality of life scores showed higher activity restriction and total TAPES scores in the microprocessor group over the mechanical group.
Participants aged 20 to 60 who had undergone transfemoral amputation for at least one year showed significant differences in outcomes based on prosthesis type.

Abstract

Mobility level is considered the primary factor for determining the effectiveness of a prosthesis. This study aimed to establish whether mobility and quality of life (QoL) are improved with a microprocessor-controlled knee (MPK) compared with a non-microprocess-controlled knee (non-MPK). Participants who have undergone transfemoral amputation (TFA), aged between 20 and 60 years, and using prosthesis for at least 1 year were included in the study. Participants were divided into two groups according to the use of MPK (n = 35) and non-MPK (n = 28) prosthesis. The PLUS-M criteria was used to score mobility, while the Trinity Amputation and Prosthetic Experience Scales-TAPES was used for classifying QoL. Mobility was higher for MPK prosthesis compared with non-MPK (p 0.05), but the group using MPK prosthesis were higher in terms of activity restriction and total TAPES score (p < 0.05). Our data shows that the type of knee joint used by participants with TFA has an effect on their QoL and mobility. Participants using MPK had better mobility, higher sub-scores related to activity restriction, and sub-scores of the QoL compared with non-MPK.

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