# K984508: Surgical Contra-Angle Handpieces, Models 975 AE,979 E/KM, 985 AE, 986 AE, 988 E/KM  and Surgical Straight Handpieces Mod

- Pathway: 510(k) (Traditional)
- Applicant: W&H Dentalwerk Buermoos GmbH
- Decided: Jun 25, 1999 after 189 days
- Product code: DZA (Drill, Dental, Intraoral)
- Device class: 1
- Regulation: 21 CFR 872.4130
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
1 later device descends from it; 1 cites it directly.
0 of 2 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA’s file for it is a 510(k) statement, which names no predicate.

## Most influential descendants
- K022505: Contra-Angle, Models 1059, 5050, 5051, 5055, 5056, 5057, 5059, 5060, 5061, 5062, 5063, 5064, 5065, 5066, 5067, 5068, (2003), 0 descendants of its own

## Indications for use
Indications are very widespread in the field of oral surgery ranging from A. Implant placement, including 1. preparation of the osteotomy site 2. bone recontouring, osteoplasty . Bone grafting 1. Preparation of the donor site (for e.g. symphysis and ascending rames etc.) 2. harvesting autogen living bone 3. sinus elevation & grafting of alveolar sockets . Removal and sectioning of teeth and teeth bone for e.g. impacted third molars and complicated extractions . Periodontal surgeries 1. bone recontouring & alveoplasty around living teeth 2. removal of exostosis . Endodontic treatment Intracanal preparations using rotating NiTi-files.

Source page: https://510kreport.com/device/K984508
Methodology: https://510kreport.com/methodology