Patent Application
20210045625
The present invention relates to a dental retractor capable of retraction and observing an inside of a mouth with the retractor and observing the inside of the hole or incised area using a micro mirror during a surgery.
In general, procedures such as implant and orthodontic treatment require the gums to be cut (to make a hole) since the doctor must treat the patient with a variety of treatment instruments that are inserted between the cut of the gums. Thus, it is necessary to keep the incised gums open as much as possible.
When the patient's mouth is opened, and the patient's cheeks are not properly gripped when cutting the gum tissue covering the teeth to treat the root of teeth, it will cause a significant disruption to the treatment. For this reason, the retractor is used to secure the visual field in the patient's mouth during various dental visits or operations and to fix the gingival tissue to cover the teeth for smooth operation.
Additionally, teeth located inside the oral cavity such as molars are difficult to discern, or access, and it is necessary to support and secure the area of the mouth with a retractor for proper visual field within the oral cavity.
With the field of view in the oral cavity using the retractor, the dental mirror is inserted into the oral cavity to examine the area to be treated and appropriate treatment is performed according to the condition of the treatment area. In the past, a retractor was used to secure a view in the oral cavity, and a separate micro mirror was inserted.
However, this method requires an operation of securing the retractor, and inserting the micro mirror separately into the mouth. This increases the number of persons required for the operation and the working time since the retractor and the mirror must be separately used.
In addition, in case of a surgery, inserting or entering the entrance of the mirror into the inside of the hole is difficult, the doctor may be unable see the inside of the hole and suffer from its inconvenience, and making surgery and treatment more difficult.
Some patent literature (e.g., U.S. Pat. Nos. 5,882,195, 8,651,862, and 9,610,009) disclose retractors having a mirror. However, the retractor of U.S. Pat. No. 9,610,009 is designed to be fixed between a gum and a cheek of a patient, and thus a doctor cannot easily change the mirror's angle to secure a view of the treatment site. Although U.S. Pat. Nos. 5,882,195 and 8,651,862 disclose retractors each having a mirror, the mirrors are a regular sized mirror, which is too large to observe inside of a hole. Consequently, even in the inventions of U.S. Pat. Nos. 5,882,195 and 8,651,862, a micro mirror must be inserted, in addition to a retractor and a tool, into the oral cavity to observe inside of a hole.
In order to resolve such problems, the inventors made intensive studies and invented the present invention.
The present invention provides a dental retractor capable of retraction and observing the inside of a mouth with only one retractor and observing the inside of the hole using a micro mirror during a surgery.
In order to solve the issues as discussed above, the present invention provides a dental retractor for securing a visual field in a patient's oral cavity during a dental treatment or surgery, or for securing the incised portion of the gum, to keep the incised area (hole) exposed. This retractor includes a handle portion, a head portion, and a mirror portion. The head part and the mirror part are integrated and the mirror part can be replaced according to the use or treatment.
The head portion is disposed on one side of the handle portion and in contact with the skin tissue inside the oral cavity and has a mirror (e.g., a micro mirror), at least one side of which is a reflective mirror and can secure a field of view to a hole in a surgical site.
According to the present invention, since the dental retractor includes the mirror portion at the head portion for observing the interior of the oral cavity such as a hole formed in the tooth root, the number of operations, the number of persons required for the operation, and the working time can be reduced, and a dental mirror is not separately required. In addition, since the head portion is formed as a mirror in the dental retractor, the other hand is available to perform other tasks such as a further medical examination.
The patent or application file contains at least one color drawing. Copies of this patent or patent application publication with color drawing will be provided by the USPTO upon request and payment of the necessary fee.
The dental retractor of the present invention is suitable for securing a visual field in a patient's oral cavity during a dental treatment or surgery while maintaining the incised portion of the gum, which covers the teeth, in an opened state. The retractor (1) has a handle portion (5) and a head portion (3), which is located at the other side of the handle portion. More specifically, the retractor (1) is formed of a body part (2) and a mirror portion (4). A mirror portion (4) is disposed at the head portion (3) of the retractor (1). The mirror part (4) is fixed to the body part and can be replaced in accordance with the needed treatment and surgery.
Further, the body part (2) has a handle portion (5), a neck portion (6) and a connecting portion (9) (as a part of the head portion (3)), to which a mirror part (4) can be attached. The handle portion (5) has a grip portion (7), which is formed so as to be graspable by a doctor, dentist, or technician. The head portion (3) including the mirror part (4) is located at an opposite side of the handle portion (5) so that head portion comes in contact with the skin tissue inside the oral cavity during operation (as illustrated in
The handle portion (5) may be tapered in a longitudinal direction from the end portion (8) toward the head portion (3), so that a doctor can securely hold the handle portion (5). Further, the handle (5) can have a circular shape, an oval shape, or polygonal shape in cross-sectional, so that the handle can be securely hold by a doctor. For example, a hexagonal cross-section is one embodiment. Further, a groove(s) may be provided at a handle to prevent slipping.
There are no limitations imposed on the material(s) of the body part. For example, the body part can be formed of a resin material, metallic material, or ceramic material or a combination thereof. Thermo-setting resin, aluminum or stainless steel or a combination thereof is preferably used for a handle material. It is preferable that body part is made from a material that is fully autoclavable for sterilization purposes.
Diameter of the grip portion is not limited but preferably 80 mm to 120 mm, more preferably 90 mm to 110 mm. The length from the end of the handle portion (8) to the end of the head portion (3) is preferably 150 mm to 200 mm, more preferably 165 mm to 185 mm.
The body part has a neck portion (6) between the handle portion (5) and the head portion (3). In general, the dimeter or width of the neck portion (6) is usually smaller that of the handle portion (5) so that a doctor can easily turn around the retractor in the mouse. The neck portion (6) can be angled or curved so that the head portion (3) can effectively reach a surgical site (e.g., gum or tooth to be treated). For example, the neck portion (6) can be bended at angle of 120 to 150°, preferably 130 to 140°.
A mirror part (4) can be fixed to the end or vicinity thereof of the neck portion (6) (i.e., a connecting portion (9)). The handle portion (5) and the neck portion (6) can be formed into a one-piece structure. Alternatively, the handle portion (5) and the neck portion (6) can be separately formed and connected to each other to form a body part (i.e., a two-piece structure).
Shapes of the body part including the handle and the neck portion are not limited to the embodiments as illustrated in the Figures. It is understood that other shapes are possible keeping in spirit of the objectives described herein.
The mirror part (4) is disposed at the head portion (3) of the retractor (1). The mirror part (4) can be permanently or detachably fixed to the connecting portion (9) of the body part (2). Any conventional method can be employed to fix the mirror part (4) to the body part (2). For example, a screw(s) (21) can be used. Further, a mirror and/or the end portion of the neck can be designed to have a structure (e.g., projection or concaved portions) so that the mirror and/or the connecting portion are engaged to be fixed each other. If necessary, a glue or other adhesive also may be used.
There is no limitation imposed on the shape of the mirror. For example, the shape of the mirror part can be selected from a variety of shapes such as a relatively simple shaped plate (e.g., blade), a plate shape having a projection (e.g., a blade with a micro mirror (82, 92)) in a plain view, as shown in
Further, such a relatively narrower portion of a mirror part can be used as a micro mirror and a tool to tread a narrow portion of a surgical portion (e.g., a hole) while observing the inside of a hole.
The mirror part (4) has reflective surface (mirror surface) on at least one surface, preferably the both surfaces, so that a doctor can observe the part of the oral cavity (e.g., gum and teeth) to be treated. Thus, in accordance with the dental retractor, a practitioner is capable of retraction and observing the inside of a mouth, and observing and treating the inside of the hole using the micro mirror during a surgery by using a single retractor.
It is preferable that a mirror part (4) is fixed to the body part (2) so that both surfaces of the mirror part function as a mirror. For example, as shown in
The mirror part (4) can be chosen from different kinds of embodiments (e.g., see
The material to form the mirror part (4) is not limited as long as the part can function as a mirror in use. For example, a stainless steel and other material (e.g., resin, metal, and ceramic) plated with silver can be preferably used. Further, it is preferable that the mirror is made from a material that is fully autoclavable for sterilization purposes.
Further, a mirror part may be formed to have a sharp edge (e.g., a cutter or a knife). Namely, in such embodiments, it can be said that a cutting or incision tool and a mirror are integrated into a single attachment. The shape of the mirror is not limited. A simple shaped plate mirror is used to secure a view of the patients mouth or to keep the incision open and prevent gingiva covering the teeth. The mirror has a plate shape and a protruding part, which is narrower than the main body that can be inserted into the hole from the incision at the surgical site allowing to observe the inside of the hole. See, e.g.,
The connecting portion (9) of the neck portion (6) has a shape or structure so that the mirror part (4) can be fixed thereto. The shape or structure of the connecting portion (9) are not limited but preferably are formed in accordance with a shape of the mirror parts (4). For example, when a mirror part has a flat surface, it is preferable that the connecting portion (9) of the neck portion (6) has a plat surface so that the mirror part can firmly contact with the end portion of the neck. The connecting portion (9) may have a slit (61), to which a mirror part can be inserted.
For example, the mirror part (4) can be fixed to the neck portion by a screw or screws (21). When using a screw(s), the connecting portion (9) and the mirror part (4) have, respectively, at least one screw hole so that the mirror is detachably connected to the neck portion by the at least one screw.
Further, additional parts can be employed in combination with the body part (2) and the mirror part (4). For example, a protector (91) can be attached to the retractor (1). More specifically, the protector (91) can be attached to the retractor (1) so as to fully or partially cover the mirror part (4) (as shown in
“Autoclaving cap” and “wings” can be also employed in combination with the retractor. For example, a wing can be disposed on a mirror blade to prevent the inconvenience or injury by touching the mouth and to secure space in the mouth. An autoclaving cap can be used to cover the blade when autoclaving to prevent being scratched. The material for caps and wings can also be possible to be autoclaved or sterilized. According to the present invention, since the dental retractor has the mirror part for observing the interior of the oral cavity, the number of operations, the number of persons required for the operation and/or the working time are reduced and it is not necessary to separately use a dental mirror.
An oral cavity can be treated by the retractor of the present invention. For example, as shown in
As described above, according to the present invention, since the dental retractor has the mirror part for observing the interior of the oral cavity, the number of operations, the number of persons required for the operation and/or the working time are reduced and it is not necessary to separately use a dental mirror. In addition, since the dental retractor has a mirror (e.g., a micro mirror) at the head portion, a doctor or other practitioner/technician can use the other hand to perform a medical examination.
Further, since the mirror portion is formed to be vertically adjustable in its angle, it is possible to secure a field of view in a desired direction by adjusting the angle of the mirror part or the head portion. Further, by using a micro mirror, it is possible to observe the inside of the hole of a tooth or a tooth root during surgery, and not change tools for surgery or treatment.
Although the above description contains many specificities, these should not be construed as limiting the scope of the invention but as merely providing illustrations of some of the presently preferred embodiments of the present invention. It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the claims so long as the objectives of the invention are met.
