# K021740: Total Knee Cemented, Semi-Constrained

- Pathway: 510(k) (Traditional)
- Applicant: Dj Orthopedics, LLC
- Decided: Sep 23, 2002 after 118 days
- Product code: JWH (Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer)
- Device class: 2
- Regulation: 21 CFR 888.3560
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to K973412 (1997). 1 ancestor in all.
52 later devices descend from it; 3 cite it directly.
0 of 54 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K973412: Natural-Knee II Constrained Knee System, Sulzer Orthopedics, Inc. (1997) Summary page 1.

## Most influential descendants
- K052687: Conformis, Inc. Total Knee Repair System (2006), 43 descendants of its own
- K094050: Itotal CR Knee Replacement System (2010), 41 descendants of its own
- K103117: Itotal Cruciate Retaining (CR) Knee Replacement System (2011), 40 descendants of its own
- K112780: Conformis Itotal Cruciate Retaining (CR) Knee Replacement System (2011), 38 descendants of its own
- K120316: Itotal Cruciate Retaining (CR) Knee Replacement System (2012), 36 descendants of its own

## Indications for use
The Alaron Surgical Active Knee@System is semi-constrained and is intended to be used only with bone cement in patients suffering from the following conditions: Non-inflammatory degenerative joint disease including osteoarthritis, traumatic arthritis, or avascular necrosis. Inflammatory degenerative joint disease including rheumatoid arthritis. Correction of functional deformity such as varus, valgus, or flexion deformities. Revision procedures where other treatments or devices have failed. Treatment of fractures that are unmanageable using other techniques.

Source page: https://510kreport.com/device/K021740
Methodology: https://510kreport.com/methodology