# US 4,905,671 A · Inducement of bone growth by acoustic shock waves

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- Number: US 4,905,671 A
- Document ID: US4905671A
- Status: Granted
- Kind: A
- Application number: 07/142,124
- Filed: 1988-01-11
- Granted: 1990-03-06
- Earliest claimed: 1988-01-11
- Assignees: Dornier Medizintechnik GmbH
- Inventors: Theodor A. Senge; Klaus-Dieter Richter; Werner Schwarze
- Web page: https://patentgrep.com/patent/US4905671A

## CPC

- A61B 17/22004: {using mechanical vibrations, e.g. ultrasonic shock waves (A61B17/225 takes precedence)}
- A61N 7/00: Ultrasound therapy (lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 {; using ultrasound for introducing media into the body A61M37/0092})
- A61B 17/58: for osteosynthesis, e.g. bone plates, screws or setting implements (A61B17/14, A61B17/16 take precedence)
- A61F 2002/286: {Bone stimulation by mechanical vibrations for enhancing ossification}
- A61N 2007/0013: {Fracture healing}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A method of inducing bone growth which comprises directing energy in the form of acoustic shock waves to a site where bone growth is desired, the amount of energy applied being sufficient to produce bleeding.

## Claims

### Claim 1

A method of inducing bone growth in a mammal which comprises directing acoustic shock waves to a site where bone growth is desired, the shock waves applying an amount of pressure sufficient to produce bleeding at said site, said amount of pressure being sufficient to induce bone growth.

### Claim 2 (depends on 1)

The method of claim 1 wherein the shock waves have a peak amplitude pressure of at least 800 bar (8.times.10.sup.7 Pa) and the intensity is about 10.sup.5 Watt/cm.sup.2.

### Claim 3 (depends on 2)

The method of claim 2 wherein at least 500 shock waves are applied.

### Claim 4 (depends on 3)

The method of claim 3 wherein the shock waves have a peak amplitude pressure of at least 1000 bar.

### Claim 5 (depends on 4)

The method of claim 4 wherein at least 1000 shock waves are applied..

### Claim 6

A method of treating osteoporosis in a mammal which comprises directing acoustic shock waves to bones which have suffered decalcification, the shock waves applying an amount of pressure sufficient to produce bleeding in said bones, said amount of pressure being sufficient to induce bone growth.

### Claim 7 (depends on 6)

The method of claim 6 wherein the shock waves have a peak amplitude pressure of at least 800 bar (8.times.10.sup.7 Pa) and the intensity is about 10.sup.5 Watt/cm.sup.2.

### Claim 8 (depends on 7)

The method of claim 7 wherein at least 500 shock waves are applied.

### Claim 9 (depends on 8)

The method of claim 8 wherein the shock waves have a peak amplitude pressure of at least 1000 bar.

### Claim 10 (depends on 9)

The method of claim 9 wherein at least 1000 shock waves are applied.