# K031998: Model J-5 Mvo-Monitor

- Pathway: 510(k) (Special)
- Applicant: Myotronics-Noromed, Inc.
- Decided: Jul 24, 2003 after 27 days
- Product code: NUW (Stimulator, Muscle, Powered, Dental)
- Device class: 2
- Regulation: 21 CFR 890.5850
- 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 K842223 (1984). 1 ancestor in all.
7 later devices descend from it; 4 cite it directly.
0 of 9 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K842223: J4 Myo-Monitor, Myo-Tronics Research, Inc. (1984) Summary page 3.

## Most influential descendants
- K092675: Grindcare (2010), 2 descendants of its own
- K203525: D function (2021), 1 descendant of its own
- K243290: BTL-785MJ (2025), 0 descendants of its own
- K163448: GrindCare System (2017), 0 descendants of its own
- K113677: Grindcare Measure (2012), 0 descendants of its own

## Indications for use
To treat Temporomandibular Joint (TMJ) dysfunction and associated pain To relieve symptoms associated with muscle spasm To relax muscles and establish a physiologic occlusion To take occlusal registrations To take denture impressions To increase local blood circulation To maintain or increase mandibular range of motion

Source page: https://510kreport.com/device/K031998
Methodology: https://510kreport.com/methodology