Brushing – scrubbing – and general cleaning – Machines – Brushing
Reexamination Certificate
2003-01-10
2003-12-09
Chin, Randall E. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
Brushing
C015S023000, C015S028000, C015S167200
Reexamination Certificate
active
06658686
ABSTRACT:
TECHNICAL FIELD
This invention relates to the field of dental hygiene.
BACKGROUND OF THE INVENTION
Many individuals suffer from periodontal disease. The term “periodontal” is generally defined as the area around the tooth. This includes the gum, periodontal membrane and bone tissue holding a tooth in place. If periodontal disease is diagnosed, dental surgery is typically required to correct the gum condition. Following surgery, it is necessary to keep the space, or sulcus, between the teeth and gum clean. This is critical for successful healing and improving the gum to a healthy condition.
The healing process following periodontal surgery is critical. Typically, immediately following surgery, the sulcus is filled with temporary protective packing for approximately one to two weeks. Gum swelling resulting from surgery has, after this period of time, subsided to the point where tooth brushing can begin. Dental plaque and food debris must thereafter be kept to a minimum in the sulcus for the gums to continue to heal correctly.
Good oral hygiene for gum healing is one of the most effective dental prophylaxes. For this reason, it is critical to obtain an effective penetration of the toothbrush bristle tips into the sulcus.
To properly clean the sulcus, many experts recommend that the bristle tips must reach to the bottom of the sulcus in order to remove all debris and plague.
Commonly known among dentists is the Bass Method, a method for properly brushing the tooth and sulcus. The Bass Method is considered the most efficient tooth brushing technique yet most people are either not familiar, or simply don't know how to properly perform.
Most individuals tend to brush only the prominent tooth surfaces, which are usually self-cleaned simply by eating fibrous foods such as meats and vegetables.
Proper use of the Bass Method requires a portion of the bristle tips to be in contact and thereafter movement of the toothbrush with a short back-and-forth motion without dislodging the tip of the bristles from their contact.
The Bass Method could be more efficiently implemented if a user could insert at least a few of the toothbrush bristle tips to the bottom of the sulcus. Unfortunately, the conventional toothbrush is not designed for its bristles to penetrate completely into the space between the tooth and gum.
Specifically, the conventional toothbrush typically has an excessive bristle surface area making it extremely difficult for individuals to position the bristles for penetration into the sulcus.
Typical toothbrushes are used to sweep their bristles back and forth across the surfaces of tooth and gum in proplylaxis. In other words, the bristles slide over small spaces between teeth and between the tooth and gum. This bristle action, because of it sliding over the spaces, actually passes over plaque and food debris, or can even force such material deeper into the space.
When a toothbrush is used in this conventional manner, the bristle tips are not properly positioned to be inserted into, nor do they have the necessary contact time within the sulcus to effectively remove plaque and food debris.
SUMMARY OF THE INVENTION
The present invention introduces a new technique and toothbrush design, which permits necessary bristle penetration into the sulcus for effective removal of plaque and food debris lodged within these spaces.
Rather than sweeping the bristles across the tooth and gum, my modified toothbrush comprises an elongated body defining a handle which connects to a rotatable brush disc. The brush disc includes a plurality of radially outward extending bristles. The width of the bristle disc and number of bristles are limited so that an effective number of the bristle tips present on the disc can, when properly positioned, penetrate into the space between tooth and gum and preferably be of sufficient length to penetrate to the bottom of the sulcus.
It is not necessary that the bristles' width i.e. the number of bristles across the bristle disc, be limited to only the width of the space between tooth and gum. What is necessary is that the overall design of the toothbrush permits a user to easily and efficiently insert a sufficient number of bristles into the sulcus for cleaning.
Preliminary Testing
In preliminary testing which preceded my final design, a standard toothbrush was modified; specifically, reducing the number of bristles by reducing the bristle surface area. The surface area was reduced so that bristle tips could be more easily inserted into the sulcus. However, patients found it difficult to implement the technique of inserting the bristles into the small space between the tooth and gum.
Further, the modified toothbrush could function properly only when the integrity and alignment of the bristles which penetrate into the sulcus were maintained in a substantially straight and rigid form during the application of the pressured strokes of the Bass Method described above.
In order to function properly, the bristle tips penetrate to the base of the sulcus. Short strokes are then used while the bristle tips are engaging or digging into the gum located at the base of the sulcus so that the bristle tips do not dislodge. After completion of the strokes, the brush is first moved vertically so the tips dislodge, then moved across to an adjacent area and the same procedure is repeated. A more detailed description of this method now follows:
A toothbrush is held using a grip at two points on the brush handle. One point would be the midpoint on the backside of the brush handle, which would be pressed with the index finger. The second point would be on the front side of the handle (same side as the bristles), which would rest against the palm of the hand. With the bristles resting on the gum-line and slight pressure applied on these two points, when minimal back and forth motion is applied, the toothbrush will be secure enough in the hand of the user to make the bristles penetrate into the small gum spaces.
While the intended results were obtained, the required brushing instructions again turned out to be difficult to follow.
Based on the difficulties associated with using bristles rigidly affixed to a brush head to clean the spaces between tooth and gum, a toothbrush was designed which is easy to orientate to the correct cleaning position and provide an effective cleaning of the space between tooth and gum.
Improved Toothbrush Design
The brush design can be incorporated for both manual and electric toothbrushes. This invention can be efficiently used as an attachment to an electric toothbrush. The strokes generated by the electric toothbrush would drive the bristles of the rotary disc or bristle wheel into the sulcus. Bristle tips are designed to conform or adapt to the shape of the tooth and gum using the motion of the strokes generated by the electric toothbrush.
The brush design can also incorporate either single or dual rotary discs, which will be discussed below. Finally, each design can also include a separate set of bristles for the conventional brushing technique of sweeping across the tooth surface, as found on a standard toothbrush.
The present invention cleans not only the tooth surface and interproximal portion between the teeth, but also facilitates the healing of simple gingivitis (minor gum inflammation). And unlike the bristles found on a conventional toothbrush which are dragged across the tooth surface in a back and forth, and up and down motion; my rotary toothbrush is designed so that an effective number of bristle tips can penetrate into the sulcus.
My design incorporates bristles that extend radially outward from a disc rotatably mounted to a toothbrush handle.
A. Single Rotary Bristle Design
When positioned properly, rotary bristles are inserted into the sulcus. Once in position, the user slowly moves the brush in a substantially horizontal direction while maintaining a constant downward force on the toothbrush so that the bristle tips will reach to the base of the sulcus. Once in position and while maintaining sufficient force on the bristle tips to keep
Chabot Ralph D.
Chin Randall E.
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