# K040539: Elliptic Matrix

- Pathway: 510(k) (Special)
- Applicant: Institut Straumann AG
- Decided: Mar 18, 2004 after 16 days
- Product code: NHA (Abutment, Implant, Dental, Endosseous)
- Device class: 2
- Regulation: 21 CFR 872.3630
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
No later device cites it as a predicate yet.
0 of 1 device in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. The summary cites one number, which could not be confirmed as its predicate (listed below).

## Cited in the summary but kept off the family tree
- K892844: Ast Reagent (Procedure Number 158), Sigma Chemical Co. (1989). Our reading of the summary gave K892844, FDA’s number for Ast Reagent (Procedure Number 158) (Sigma Chemical Co.). Its FDA name has none of the distinctive words the summary uses for the device it names, “Gold Matrix”. Kept off the family tree.

## Indications for use
The Elliptic Matrix is attached onto the Straumann Retentive Anchor abutment to provide support and retention for an overdenture.

Source page: https://510kreport.com/device/K040539
Methodology: https://510kreport.com/methodology