# K163131: A-dec NLZ Electric Motor System

- Pathway: 510(k) (Traditional)
- Applicant: Nakanishi, Inc.
- Decided: May 11, 2017 after 184 days
- Product code: EBW (Controller, Foot, Handpiece And Cord)
- Device class: 1
- Regulation: 21 CFR 872.4200
- 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 K032572 (2003). 2 ancestors in all.
4 later devices descend from it; 4 cite it directly.
0 of 7 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K133776: A-Dec/W&H Electric Handpiece Motor, A-Dec, Inc. (2014) Summary page 5.

## Most influential descendants
- K251811: Motor and Apex Module (MaAM) (2025), 0 descendants of its own
- K202963: ELEC Master, ELEC Master Dual (2023), 0 descendants of its own
- K202075: Dental Electric Motor (2022), 0 descendants of its own
- K203706: Dental Electric Motor (2022), 0 descendants of its own

## Indications for use
The A-dec NLZ electric motor system is comprised of a control unit that drives a direct current (DC) electric micromotor that is activated by means of a foot control. It is intended for use in general dental applications such as: cutting a tooth for cavity preparation, crown preparation, crown finishing, inlay, filing, polishing, prophylaxis and endodontic treatment, with use of a straight, right-angle or contra-angle ISO E-type handpiece attachment of equal, gear-reducing, or gear-increasing speed.

Source page: https://510kreport.com/device/K163131
Methodology: https://510kreport.com/methodology