FDA product code · Dental · Class 2
NXC: Aligner, Sequential
NXC is FDA's product code for "Aligner, Sequential": a Class 2 device classified under 21 CFR 872.5470, reviewed by the Dental panel.
510(k) review time for NXC
Across 125 510(k) clearances under NXC decided from 2018-01-01 to 2026-10-06, the median was 127 days from FDA receipt to decision. Half took between 65 and 255 days, and 80% were decided within 266 days. These are past clearances, not a forecast for a new submission.
| Fastest | 1 |
|---|---|
| 25th percentile | 65 |
| Median | 127 |
| 75th percentile | 255 |
| 80th percentile | 266 |
| 90th percentile | 310 |
| Slowest | 1,178 |
| Year | Median days | n |
|---|---|---|
| 2018 | 116 | 11 |
| 2019 | 182 | 16 |
| 2020 | 230 | 16 |
| 2021 | 97 | 20 |
| 2022 | 137 | 19 |
| 2023 | 152 | 13 |
| 2024 | 105 | 14 |
| 2025 | 61 | 11 |
| 2026 (to 10-06, partial) | 127 | 5 |
Source: openFDA 510(k) records, snapshot of 2026-10-06 (openFDA data as of 2026-09-28). Compare 510(k) review times across all device types, see every code side by side in the Clearance Timeline Estimator, or browse the clearances themselves in PredicateScope.
NXC in the public FDA record
| 510(k) clearances, all years | 145 |
|---|---|
| Establishment listings | 191 |
| GUDID device identifiers | 1,484 |
Counts of records, not of devices or events. Adverse event reports for NXC are in MAUDEScope, as counts with the query shown: MAUDE has no denominator, so a report count is not a rate and does not show that a device caused an event.
FDA-recognized standards that cite NXC
3 FDA recognized consensus standards cite NXC, among them ISO 20795-2 Second edition 2013-03-01; ANSI ADA Standard No. 139-2020; ANSI ADA Standard No. 41-2020. Horizontal standards such as biocompatibility, sterilization and software standards can apply without citing the code.
- 4-233 ISO 20795-2 Second edition 2013-03-01 — Dentistry - Base polymers - Part 2: Orthodontic base polymers
- 4-294 ANSI ADA Standard No. 139-2020 — Dental Base Polymers
- 4-295 ANSI ADA Standard No. 41-2020 — Evaluation of Biocompatibility of Medical Devices Used in Dentistry
Source: FDA Recognized Consensus Standards, snapshot of 2026-09-01. Search them all in the Consensus Standards Lookup.