Cleared Traditional

K254163 - VarioSurg 4 (FDA 510(k) Clearance)

Class II Dental device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K254163 · Nakanishi, Inc. · Dental device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Dec 2025
Decision
1d
Days
Class 2
Risk

K254163 is an FDA 510(k) clearance for the VarioSurg 4. Classified as Drill, Bone, Powered (product code DZI), Class II - Special Controls.

Submitted by Nakanishi, Inc. (Kanuma, JP). The FDA issued a Cleared decision on December 23, 2025 after a review of 1 days - a notably fast clearance cycle.

This device falls under the Dental FDA review panel, regulated under 21 CFR 872.4120 - the FDA dental device regulatory framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Fast-track predicate clearance. Standard predicate reliance. The short review cycle indicates strong predicate alignment - the FDA found sufficient equivalence without extended technical review.

View all Nakanishi, Inc. devices

Submission Details

510(k) Number K254163 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received December 22, 2025
Decision Date December 23, 2025
Days to Decision 1 days
Submission Type Traditional
Review Panel Dental (DE)
Summary Summary PDF
Third-party Review Yes - reviewed by an FDA-accredited third party
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
126d faster than avg
Panel avg: 127d · This submission: 1d
Pathway characteristics
Predicate-based equivalence. No clinical trials required. Third-party reviewed.

Device Classification

Product Code DZI Drill, Bone, Powered
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 872.4120
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Dental devices follow this clearance model.

Regulatory Consultant

Third Party Review Group, LLC
Dave Yungvirt

The regulatory consultant manages the 510(k) submission process on behalf of the applicant - coordinating technical documentation, predicate strategy and FDA communications. Identifying the consultant behind a submission is a key signal for competitive regulatory intelligence.