MAUDE Adverse Event Report: LARES RESEARCH LARES RESEARCH; HIGH-SPEED DENTAL HANDPIECE

Model Number	557 PROSTYLE SF
Medical Device Problem Code	Mechanical Problem (1384)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/21/2025
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The dr.Sent in the handpiece with a bur which was identified as a low-speed polishing bur.This bur was not designed for high-speed operation and may have compounded the worn bearing vibration which caused the head cap to come off.
Event or Problem Description
Dr.Sent handpiece in for repair with a note stating the head cap had come off in a patient's mouth.The head cap was retrieved and no injury was reported.

• Brand Name: LARES RESEARCH
• Common Device Name: HIGH-SPEED DENTAL HANDPIECE
• Manufacturer (Section D): LARES RESEARCH; 295 lockheed avenue; chico CA 95973
• Manufacturer (Section G): LARES RESEARCH; 295 lockheed avenue; chico CA 95973
• Manufacturer Contact: bruce holderbein ; 295 lockheed avenue; chico, CA 95973 ; 5303451767
• MDR Report Key: 22576802
• Report Number: 2916440-2025-00007
• Device Sequence Number: 15862454
• Product Code: EFB
• UDI-Device Identifier: D950131242220
• UDI-Public: D950131242220
• Combination Product (Y/N): N
• Initial Reporter State: WA
• Initial Reporter Country: US
• PMA/510(K) Number: K141221
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Dentist
• Remedial Action: Replace
• Type of Report: Initial
• Report Date (Section B): 07/23/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Health Professional
• Device Model Number: 557 PROSTYLE SF
• Device Catalogue Number: 13124-222
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 07/21/2025
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 07/21/2025
• Initial Report FDA Received Date: 07/23/2025
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 01/31/2017
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Sex: Unknown