# K252531: Myosa (S1H, S1, S2, S3, S1M, S2M); Myosa for Snorers (S1, S1M, S2)

- Pathway: 510(k) (Traditional)
- Applicant: Myofunctional Research Co.
- Decided: Mar 2, 2026 after 202 days
- Product code: LRK (Device, Anti-Snoring)
- Device class: 2
- Regulation: 21 CFR 872.5570
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 9 generations back to K882303 (1989). 43 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 45 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K132506: Sleeptight Mouthpiece, Sleeppro, Quietnite, Altitude Mouthpiece, Sleep Easy, Michael D Williams Dds PA (2014) Summary page 5.
- K191618: SleepTight Mouthpiece STZ, Michael D Williams Dds PA (2019) Summary page 5.
- K111680: DR. Greensburg's Hybrid, Always More Marketing, Inc. (2011) Summary page 5.
- K182312: Zyppah Anti-Snoring Device, Always More Marketing (2019) Summary page 5.
- K231663: The AVEOtsd (Tongue Stabilizing Device) Mouthpiece, Innovative Health Technologies (Nz), Ltd. (2023) Summary page 5.

## Most influential descendants
- K261912: SnØreNegatØr (2026), 0 descendants of its own

## Indications for use
Rx: The Myosa (S1H, S1, S1M, S2, S2M and S3) appliances are intended to treat snoring and/or mild to moderate obstructive sleep apnea in adults at least 18 years old. OTC: The Myosa for Snorers (S1, S1M and S2) are intended to treat snoring in adults at least 18 years old.

Source page: https://510kreport.com/device/K252531
Methodology: https://510kreport.com/methodology