Hollow Cylinder Osteotome, Osteotome Chisel Insert - Ø 4.0 mm by Dr. Volmer and Dr. Rainer Valentin | Helmut Zepf No. 47.750.14
The Hollow Cylinder Dental Osteotome is a precision-engineered surgical instrument designed for demanding implantology and oral surgery procedures. This specific model — a Hollow Cylinder Osteotome Chisel Insert with a diameter of 4.0 mm — was developed by Dr. Volmer and Dr. Rainer Valentin and is manufactured by Helmut Zepf GmbH under product number 47.750.14.
Instrument Overview
The Hollow Cylinder Dental Osteotome chisel insert features a 4.0 mm diameter, making it suitable for precise bone preparation in implant site development. Osteotomes of this type are commonly used to condense and expand crestal bone rather than remove it, helping to preserve bone density and improve implant stability.
Design & Origin
Developed in collaboration with Dr. Volmer and Dr. Rainer Valentin, this instrument reflects clinical expertise applied directly to instrument design. Manufactured in Germany by Helmut Zepf GmbH, it upholds the high standards of quality and craftsmanship associated with German dental instrument manufacturing.
Key Features
- Hollow cylinder chisel insert design for targeted bone preparation
- Diameter: 4.0 mm
- Developed by Dr. Volmer and Dr. Rainer Valentin
- Manufactured by Helmut Zepf GmbH, Germany
- Product reference: No. 47.750.14
Clinical Application
The Hollow Cylinder Dental Osteotome is intended for use in implant site preparation, particularly in procedures requiring controlled crestal bone expansion or condensation. Its insert format allows for compatibility within a comprehensive osteotome system, giving clinicians flexibility across a range of surgical scenarios.
1-Year Warranty
This Helmut Zepf instrument is covered by a 1-year warranty against defects in materials and workmanship from the date of delivery.
60-Day Returns — Any Reason, Even If Used
Put this instrument to work in your practice. If it is not right for you, return it within 60 days of delivery for a full refund — for any reason, even if it has been used.

FAQ
What procedure is this osteotome used for? This instrument is used in implant dentistry for bone site preparation, including lateral and crestal bone expansion techniques.
What is the diameter of this chisel insert? The chisel insert has a diameter of 4.0 mm.
Who designed this instrument? It was developed by Dr. Volmer and Dr. Rainer Valentin in collaboration with Helmut Zepf GmbH.
Specifications: Helmut Zepf No. 47.750.14
| Zepf No. | 47.750.14 |
| Instrument type | Hollow cylinder osteotome chisel insert |
| Pattern / designer | Dr. Volmer and Dr. Rainer Valentin |
| Working end | Hollow cylinder chisel, Ø 4.0 mm |
| Pack / sold as | Single instrument |
This Ø 4.0 mm hollow cylinder osteotome chisel insert by Dr. Volmer and Dr. Rainer Valentin cores a cylinder of bone rather than compressing it, so an implant site can be prepared in dense bone with minimal loss of volume. The hollow design keeps the bone core inside the cylinder, where it can be retrieved for grafting. The chisel-edged version is used to free the core at the base of the cut.
Read the guides: Dental Osteotomes Explained · Bone Splitting System · Osteotomes & Sinus Lift Instruments · All implantology instruments · All Helmut Zepf instruments
Backed by our Helmut Zepf Warranty — lifetime on extraction and explantation forceps, one year on every other Zepf instrument. Full terms and how to make a claim are on the Warranty page.
