# K983728: Lorenz Imf Screw

- Pathway: 510(k) (Traditional)
- Applicant: Walter Lorenz Surgical, Inc.
- Decided: May 13, 1999 after 203 days
- Product code: DZL (Screw, Fixation, Intraosseous)
- Device class: 2
- Regulation: 21 CFR 872.4880
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 2 generations back to K820944 (1982). 4 ancestors in all.
9 later devices descend from it; 3 cite it directly.
0 of 14 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K963030: Leibinger Imf Screw, Howmedica Leibinger, Inc. (1997) Summary page 3.

## Most influential descendants
- K040983: Lorenz Self-Drilling Imf Screw (2004), 7 descendants of its own
- K143336: Biomet Microfixation OmniMax MMF System (2015), 5 descendants of its own
- K173320: KLS Martin L1 MMF System (2018), 2 descendants of its own
- K241314: KLS Martin Oral-Max Implants MR Conditional (bundled) (2024), 1 descendant of its own
- K152326: Biomet Microfixation OmniMax MMF System (2015), 1 descendant of its own

## Indications for use
The Lorenz IMF Screw is intended for use as a bone screw in temporary fixation of the maxilla and mandible, providing indirect stabilization of fractures of the maxilla and/or the mandible.

Source page: https://510kreport.com/device/K983728
Methodology: https://510kreport.com/methodology