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Updated: Jul 4, 2026

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

Published on: November 6, 2015

[Moje prosthesis for the proximal interphalangeal joint].

A Wesemann¹, M Flügel, M Mamarvar

¹Klinik für Plastische, Asthetische und Handchirurgie, Ev. Diakoniewerk Friederikenstift Marienstrasse, Hannover. alena_wesemann@gmx.net

Handchirurgie, Mikrochirurgie, Plastische Chirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Handchirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Mikrochirurgie Der Peripheren Nerven Und Gefasse : Organ Der V

|June 14, 2008

Summary

The Moje ceramic implant for proximal interphalangeal (PIP) finger joints showed limited range of motion and strength compared to non-operated hands. High re-operation rates due to loosening and fractures indicate it does not meet clinical expectations for PIP joint replacement.

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Area of Science:

Orthopedic surgery
Biomaterials science
Hand surgery

Background:

Primary arthrosis affects the proximal interphalangeal (PIP) finger joint.
Surgical intervention aims to restore function and alleviate pain.
Ceramic implants are explored for joint replacement due to their biocompatibility.

Purpose of the Study:

To evaluate the clinical performance of the Moje ceramic implant for PIP joint replacement.
To compare the outcomes of Moje implant surgery with non-operated hands.
To determine if the Moje implant meets clinical expectations for PIP joint arthroplasty.

Main Methods:

A prospective study involving 15 patients (21 Moje implants) for PIP joint replacement.
Data collected included postoperative range of motion, strength, pain reduction (VAS), patient satisfaction, and complications.
Computer-assisted data collection was utilized for analysis.

Main Results:

Average PIP joint range of motion was 18.5 degrees (26% of contralateral side).
Pinch strength was 56% of the non-operated side; grip power was 94.2%.
80% reported pain improvement, but 13 re-operations were needed for implant loosening, subluxation, and fractures.

Conclusions:

The Moje ceramic implant does not meet ideal attributes for PIP joint replacement.
Design modifications have not resolved deficits in range of motion and stability.
The current design is inadequate for effective PIP joint replacement due to performance and stability issues.