# US 5,345,645 A · Subgingival toothbrush

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- Number: US 5,345,645 A
- Document ID: US5345645A
- Status: Granted
- Kind: A
- Application number: 07/855,584
- Filed: 1992-03-23
- Granted: 1994-09-13
- Earliest claimed: 1992-03-23
- Inventors: Lawrence R. Page
- Web page: https://patentgrep.com/patent/US5345645A

## CPC

- A46B 9/04: {Arranged like in or} for toothbrushes
- A46B 2200/1066: Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04)
- Y10S 15/05: Varied length bristle
- A46B: BRUSHES (handles not integral with brushware B25G)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

This invention directs itself to a subgingival toothbrush (10) for insertion of first and second sets of bristles (36 and 38) below the gum line (22) of a user. First and second sets of bristles (36 and 38) are adapted to be oscillated and abrasively contact a tooth surface (20) below the gum line (22) to disrupt bacteria adhering to the tooth surface (20). The first and second sets of bristles (36 and 38) are encapsulated by an encapsulating pair of sleeve members (40 and 42) to provide stabilization of the first and second sets of bristles (36 and 38) when in operational use. In this manner, first and second sets of bristles (36 and 38) can optimally be inserted beneath the gum line (22) of a user (14) for abrasive action against the tooth surface (20) and aid in controlling periodontal disease.

## Claims

### Claim 1

A subgingival toothbrush comprising:
(a) a handle member extending in a longitudinal direction, said handle member having a gripping section and a base section forming a substantially planar upper surface;
(b) only first and second longitudinally aligned bristle tufts fixedly secured to said base section of said handle member, each of said first and second tufts extending in a substantially normal direction with respect to said substantially planar upper surface and having a predetermined length approximately 16.0 mm above said base section upper surface, each first and second tuft having a substantially linearly inclined upper surface envelope forming an envelope apex therebetween for subgingival penetration by said first and second tufts; and,
(c) a first and second bristle encapsulation means for respectively supporting said first and second tufts, said first and second bristle encapsulation means being normally directed to said base section upper surface and fixedly secured to said base section for continuously surrounding said first and second tufts throughout a predetermined length above said base section.

### Claim 2 (depends on 1)

The subgingival toothbrush as recited in claim 1 where said first and second bristle encapsulation means include first and second sleeve members surrounding and supporting said first and second tufts respectively.

### Claim 3 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second sleeve members are substantially longitudinally aligned each with respect to the other.

### Claim 4 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second sleeve members are substantially longitudinally aligned and adjacently located each with respect to the other.

### Claim 5 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second sleeve members are longitudinally aligned and displaced each from the other by a predetermined distance.

### Claim 6 (depends on 5)

The subgingival toothbrush as recited in claim 5 where said first and second sleeve members are displaced each from the other by a distance approximately 1.0 mm.

### Claim 7 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second sleeve members are formed of a plastic material composition.

### Claim 8 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second sleeve members have an extended length extending above said base section approximately 8.0 mm.

### Claim 9 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said first and second tufts are formed of a nylon composition.

### Claim 10 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said gripping section and said base section of said handle member are substantially planar.

### Claim 11 (depends on 2)

The subgingival toothbrush as recited in claim 2 where said gripping section and said base section of said handle member are substantially out of plane each with respect to the other.