Cleared Traditional

K211584 - Oral Surgery Contra

K211584 is an FDA 510(k) clearance for Oral Surgery Contra, manufactured by Nakanishi, Inc.. The device is a Class 2 Dental device with product code KMW cleared through the Traditional 510(k) pathway after a 87-day FDA review.

K211584 · Nakanishi, Inc. · Dental device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Aug 2021
Decision
87d
Days
Class 2
Risk

K211584 is an FDA 510(k) clearance for the Oral Surgery Contra. Classified as Handpiece, Rotary Bone Cutting (product code KMW), Class II - Special Controls.

Submitted by Nakanishi, Inc. (Kanuma, JP). The FDA issued a Cleared decision on August 19, 2021 after a review of 87 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

FDA 510(k) Submission Details - K211584

510(k) Number K211584 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 24, 2021
Decision Date August 19, 2021
Days to Decision 87 days
Submission Type Traditional
Review Panel Dental (DE)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
40d faster than avg
Panel avg: 127d · This submission: 87d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

KMW Device Classification - Class 2, Special Controls

Product Code KMW Handpiece, Rotary Bone Cutting
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

Ken Block Consulting, LLC
Yulia Nikova

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.

Regulatory Peers - KMW Handpiece, Rotary Bone Cutting

All 7
Devices cleared under the same product code (KMW) and FDA review panel - the closest regulatory comparables to K211584.
Surgical Angle Handpiece, Surgical Straight Handpiece
K171155 · Nakanishi, Inc. · Nov 2017
OsteoMed PINNACLE Driver
K162544 · Osteomed · Apr 2017
SURGICAL HANDPIECES, MIKRO SAW HANDPIECES
K080939 · W&H Dentalwerk Buermoos GmbH · Jul 2008
FRIOS MICROSAW
K994298 · Friadent GmbH · Feb 2000
OSTEOPOWER SYSTEM AND ACCESSORIES
K971692 · Osteomed Corp. · Jun 1997
E-TYPE SPEED REDUCER CONTRA ANGLE
K970953 · Nsk Nakanishi, Inc. · Apr 1997