Patent Publication Number: US-2011059416-A1

Title: Assistant apparatus for oral treatment and unit chair with the same

Description:
TECHNICAL FIELD 
     The present invention relates to an assistant apparatus for oral treatment including dental treatment and a unit chair with the same, and more specifically, to an assistant apparatus which prevents the blood of a patient or washing liquid from entering a patient&#39;s throat during oral treatment and also prevents a medical instrument or component from entering the throat of a patient such that the pharynx of the patient is not injured by the medical instrument or component. 
     BACKGROUND ART 
     In general, during oral treatment including a dental treatment, a patient sits on a unit chair, the chair is reclined, and then the patient is treated using various instruments provided on the unit chair. 
     Since the chair is reclined and the patient is substantially horizontal, washing liquid or the patient&#39;s blood or saliva stays in the oral cavity during the oral treatment and is then discharged to the outside through a fluid suction unit provided on the unit chair. 
     Although the washing liquid, blood or saliva is discharged to the outside through the fluid suction unit, it is not discharged immediately. Therefore, the patient has to roll his/her tongue back to block the washing liquid, blood or saliva from entering the gullet or airway through the throat. 
     Further, although the patient tries to block his/her throat with his/her tongue, some of the washing liquid, blood, or saliva inevitably enters the throat and is swallowed. This causes an unpleasant feeling and movement of the oral cavity which interrupts the treatment. 
     Further, during the oral treatment, in addition to healthcare practitioners such as a dentist and nurse, a separate assistant is needed to position a suction tube of the fluid suction unit in the oral cavity such that fluid can be suctioned out. When a healthcare practitioner suctions out the fluid without such an assistant, either treatment must be interrupted or the healthcare practitioner must operate a treatment tool and the suction tube simultaneously. 
     Further, when the healthcare practitioner accidently drops a medical instrument or component used during the oral treatment, it may penetrate the skin inside the oral cavity or enter the throat and injure the patient&#39;s pharynx. 
     Recently, a treatment method using a rubber dam for dental surgery is being used to prevent contamination of an affected part during dental treatment. 
     The rubber dam formed of a thin latex film is put between the patient&#39;s teeth and clamped in place. 
     However, the clamp should be checked and fixed in accordance with the structure of the oral cavity. Further, although a region blocked by the rubber dam can block external matter (washing liquid and so on) from entering the throat, it cannot block saliva formed in the oral cavity during treatment. 
     Therefore, during treatment using a rubber dam, the patient still has to block saliva from entering the throat with his/her tongue. Further, an additional process of fixing the rubber dam is required. 
     DISCLOSURE 
     Technical Problem 
     The present invention is directed to an assistant apparatus for oral treatment that prevents washing liquid or saliva from entering a patient&#39;s throat during oral treatment, thereby preventing patient inconvenience and treatment interruption. 
     The present invention is also directed to an assistant apparatus for oral treatment that prevents a medical instrument or component from approaching a patient&#39;s skin or pharynx when the medical instrument or component is accidentally dropped by a healthcare practitioner, thereby preventing patient injury. 
     The present invention is also directed to an assistant apparatus for oral treatment that can be used without a separate assistant to operate a fluid suction unit during oral treatment. 
     Technical Solution 
     According to an aspect of the present invention, an assistant apparatus for oral treatment includes: an oral cavity insertion member that includes an adjustable volume portion of which volume is expandable by fluid; and a fluid supply configured to supply the fluid to the adjustable volume portion. 
     According to another aspect of the present invention, an assistant apparatus for oral treatment includes an oral cavity insertion member that is inserted into an oral cavity in front of a uvula of a patient to prevent washing liquid used during the oral treatment or saliva from entering a gullet or an airway of the patient. 
     According to still another aspect of the present invention, an assistant apparatus for oral treatment includes an oral cavity insertion member including: a body portion that includes a connection path through which fluid is able to flow; an oral cavity adhesion portion that is provided on an outer circumference of the body portion and adhered to skin inside an oral cavity of a patient; and at least one fluid suction holes that is formed on one surface of the oral cavity adhesion portion to be connected to the connection path. 
     According to yet another aspect of the present invention, an assistant apparatus for oral treatment includes an oral cavity insertion member including: a body portion having a predetermined thickness; and an oral cavity adhesion portion that is provided on the outer circumference of the body portion and is thinner than the predetermined thickness of the body portion. 
     According to yet another aspect of the present invention, a unit chair for oral treatment includes an oral cavity insertion member including: a body portion having a connection path formed therein, through the connection path fluid is able to flow; an oral cavity adhesion portion that is provided on an outer circumference of the body portion and adhered to skin inside an oral cavity of a patient; and at least one fluid suction holes that is formed on one surface of the oral cavity adhesion portion to be connected to the connection path; and a fluid suction unit that is connected to the connection path and provides a negative pressure to the fluid suction holes. 
     Advantageous Effects 
     According to the present invention, during oral treatment, washing liquid or saliva can be prevented from entering a patient&#39;s throat. Therefore, it is possible to prevent patient inconvenience and treatment interruption. 
     Further, even when a healthcare practitioner accidently drops a medical instrument or component used during oral treatment, the assistant apparatus can prevent injury to the skin inside the oral cavity or the pharynx. 
     Further, a healthcare practitioner such as a dentist or nurse performing oral treatment without a separate assistant to operate a fluid suction unit can suction out washing liquid or saliva from the oral cavity without separate or additional tool manipulation. 
     Other objects, features and advantages of the present invention will be made more apparent by illustrating and describing in detail exemplary embodiments of the invention below. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a side view showing a state in which an assistant apparatus for oral treatment according to an example embodiment of the present invention is coupled to the oral cavity of a patient. 
         FIG. 2  is a front view of the oral cavity, showing a state in which an assistant apparatus for oral treatment according to an example embodiment of the present invention is coupled to the oral cavity. 
         FIG. 3  is a perspective view of the assistant apparatus for oral treatment according to an example embodiment of the present invention. 
         FIG. 4  is a cross-sectional view of an oral cavity insertion member of  FIG. 3 , taken along a line I-I′. 
         FIG. 5  is a cross-sectional view of a modification of the oral cavity insertion member taken along a line I-I′ of  FIG. 3  according to another example embodiment of the present invention. 
         FIG. 6  is a perspective view of an assistant apparatus for oral treatment according to another example embodiment of the present invention. 
         FIG. 7  is a cross-sectional view of an oral cavity insertion member of  FIG. 6 , taken along a line 
         FIG. 8  is a perspective view of an assistant apparatus for oral treatment according to a further example embodiment of the present invention. 
         FIG. 9  is a cross-sectional view of an oral cavity insertion member of  FIG. 8 , taken along a line 
         FIG. 10  is a perspective view of an assistant apparatus for oral treatment according to still another example embodiment of the present invention. 
         FIG. 11  is a cross-sectional view of an oral cavity insertion member of  FIG. 10 , taken along a line IV-IV′. 
         FIG. 12  is a diagram showing the structure of a fluid supply according to the present invention. 
         FIG. 13  is a front perspective view of an assistant apparatus for oral treatment according to still another example embodiment of the present invention. 
         FIG. 14  is a rear perspective view of the assistant apparatus shown in  FIG. 13 . 
         FIG. 15  is an exploded cross-sectional view of an oral cavity insertion member of  FIG. 13 . 
         FIG. 16  is a rear view of the oral cavity insertion member of  FIG. 13 . 
         FIG. 17  is a front view of the oral cavity insertion member of  FIG. 13 . 
         FIGS. 18 and 19  are cross-sectional views of the oral cavity insertion member of  FIG. 17 , taken along lines V-V′ and VI-VI′, respectively. 
         FIG. 20  is a perspective view of the oral cavity of a patient before the assistant apparatus for oral treatment according to the present invention is inserted. 
         FIG. 21  is a perspective view of the oral cavity when the assistant apparatus for oral treatment is coupled to the oral cavity. 
         FIG. 22  is a diagram showing a state in which an assistant apparatus for oral treatment according to an example embodiment of the present invention is coupled to a unit chair. 
         FIG. 23  is an expanded view of a region VII of  FIG. 22 , illustrating a connector according to the present invention. 
         FIG. 24  is a perspective view of an assistant apparatus for oral treatment according to still another example embodiment of the present invention. 
       Description of reference numerals of Main Elements in Drawings 
         10000 ,  11000 ,  12000 : Oral cavity insertion member 
         10100 ,  10200 : Coupling terminal,  11100 : Inflatable membrane 
         11200 : Adjustable volume portion,  11110 : Convex portion 
         11200 : Fixed volume portion,  11310 : First fluid passage portion 
         11320 : Fluid injection hole,  11400 : Oral cavity adhesion portion 
         11410 : Second fluid passage portion,  11420 : Fluid suction hole 
         12100 : Body portion,  12200 : Oral cavity adhesion portion 
         12220 : Fluid suction hole,  12300 : Respiration hole 
         12400 : Bonding portion,  21000 : Fluid supply 
         22000 : Fluid suction unit,  30000 : Connector 
         41000 ,  42000 : Fluid transfer tube,  50000 : Unit chair 
     
    
    
     MODE FOR INVENTION 
     According to example embodiments of the present invention, the oral cavity and the throat (including the pharynx and the larynx) of a patient are blocked by positioning an oral cavity insertion member in front of the uvula, or preferably, on the soft palate during oral treatment. Therefore, washing liquid used during the oral treatment, the patient&#39;s saliva and blood, as well as treatment instruments can be prevented from entering the throat. 
     Referring to  FIGS. 2 to 12 , an example in which the volume of an oral cavity insertion member according to an example embodiment of the present invention is changed by a positive pressure will be described. Further, referring to  FIGS. 13 to 23 , an example in which an oral cavity insertion member according to another example embodiment of the present invention adheres to the oral cavity by a negative pressure will be described. 
     In an example embodiment of  FIGS. 11 and 12 , a positive pressure and a negative pressure may be used together. 
     In an example. embodiment of  FIG. 24 , an oral cavity insertion member may be used without a positive pressure and a negative press. 
     Hereinafter, example embodiments of the present invention will be described with reference to the accompanying drawings. 
       FIG. 1  is a diagram showing a state in which an oral cavity insertion member of an assistant apparatus for oral treatment according to an example embodiment of the present invention is coupled to the oral cavity of a patient. 
     A patient  1000  having oral treatment lies on a chair (unit chair) and opens his/her mouth to expose his/her oral cavity  1100 . A healthcare practitioner such as a doctor or nurse inserts an oral cavity insertion member  10000  into the oral cavity  1100 . The healthcare practitioner positions the oral cavity insertion member  10000  in front of the uvula  1120 , or specifically, on the soft palate and a rear portion of the tongue such that washing liquid, saliva, and medical instruments/components used during the oral treatment are prevented from entering the throat  1130 . The healthcare practitioner supplies fluid to or suctions fluid from the oral cavity insertion member  10000  through a pump  20000  such as a fluid supply or fluid suction unit such that the volume of the oral cavity insertion member  10000  expands due to a positive pressure or adheres to the oral cavity through adhesion holes included in the oral cavity insertion member  10000  due to a negative pressure. 
     Each patient  1000  has an oral cavity with a different structure and size. Therefore, while the oral cavity insertion member  10000  expands or adheres to the oral cavity through the adhesion holes, a path from the front of the oral cavity  1100  to the throat  1130  is blocked. 
     Alternatively, the pump  20000  may be not connected to the oral cavity insertion member  10000 . In this case, as shown in  FIG. 24 , the oral cavity insertion member  10000  may be used in a state in which it is positioned in front of the uvula  1120 , or specifically, on the soft palate and the rear portion of the tongue. 
     At this time, when the patient is treated, he/she lies in the chair. Therefore, the oral cavity insertion member  10000  is held in a stable position. Thereafter, as shown in  FIG. 24 , the oral cavity insertion member  10000  may be continuously supported by a handle member. Further, an adhesive material may be applied to a surface of the oral cavity insertion member, which comes in contact with the skin inside the oral cavity. 
       FIG. 2  is a front view of the oral cavity of a patient, showing a state in which an oral cavity insertion member of an assistant apparatus for oral treatment according to an example embodiment of the present invention is coupled to the oral cavity. Referring to  FIG. 2 , an oral cavity insertion member  11000  using a positive pressure will be described. 
     As the oral cavity insertion member  11000  is positioned deep inside the oral cavity  1100  in front of the uvula  1120 , or preferably, on the soft palate, in a state in which the patient&#39;s mouth is open, the oral cavity insertion member  11000  does not obstruct treatment instruments when a healthcare practitioner treats the patient  1000 . 
     Further, since it is positioned on the tongue  1110 , the oral cavity insertion member  11000  may be formed in a half-moon or new-moon shape. 
     For a fluid supply  21000 , a separate compressor may be used. Alternatively, an air pump included in the unit chair may be used. When a separate compressor is used, a manual or electric pump may be used. 
     For the fluid, gas such as air, oxygen, or nitrogen, or liquid such as water, may be used. In this example embodiment of the present invention, air is used as the fluid and an electric air pump is used as the compressor. 
     Since the volume of the oral cavity insertion member  11000  can be changed by a positive pressure, the oral cavity insertion member  11000  can be effectively used for various oral cavity structures. 
       FIG. 3  is a perspective view of the assistant apparatus for oral treatment according to an example embodiment of the present invention. The assistant apparatus for oral treatment includes the positive pressure-type oral cavity insertion member  11000  and the fluid supply  21000  which supplies fluid to the oral cavity insertion member  11000 . 
     The oral cavity insertion member  11000  includes a coupling terminal  10100  for injecting fluid supplied from the fluid supply  21000  and an adjustable volume portion  11200  whose volume changes when the fluid is supplied. 
     The fluid supply  21000  supplies fluid to the oral cavity insertion member  11000  through a fluid transfer tube  41000  connected to the fluid-injection coupling terminal  10100  of the oral cavity insertion member  11000 , thereby expanding the volume of the adjustable volume portion  11200 . 
     The assistant apparatus for oral treatment may further include a fluid suction unit  22000  for discharging washing liquid or saliva from the oral cavity  1100  to the outside during oral treatment. 
     For the fluid suction unit  22000 , a separate pump may be used or an air pump included in the unit chair may be used. When a separate pump is used, it may be a manual or electric pump. 
     In this example embodiment of the present invention, an air pump included in the unit chair, that is, a suction instrument which is generally used in dental treatment, is used as the fluid suction unit  22000 . 
     The fluid suction unit  22000  is connected to a coupling terminal  10200  included in the oral cavity insertion member  11000  through a fluid transfer tube  42100 . 
     Further, the coupling terminal  10200  of the oral cavity insertion member  11000  may also be coupled to a fluid transfer tube  42200  for positioning a suction port in the oral cavity  1100 . 
     As such, the healthcare practitioner can suction washing liquid or salvia out of the oral cavity through the fluid transfer tubes  42100  and  42200  connected to the fluid suction unit  22000  during dental treatment without a separate assistant. 
     In other example embodiments of the present invention which will be described with reference to  FIGS. 4 to 24 , the fluid suction unit  22000  and the fluid transfer tubes  42100  and  42200 , which are illustrated in  FIG. 3  and serve to suction washing liquid or salvia out of the oral cavity, are not shown. However, the fluid suction unit  22000  and the fluid transfer tubes  42100  and  42200  can be applied to the example embodiments. 
     FIGS..  4  and  5  are cross-sectional views of the oral cavity insertion member of  FIG. 3 , taken along a line I-P. 
     The adjustable volume portion  11200  of the oral cavity insertion member  11000  is formed of an inflatable membrane  11100  composed of an elastic material, and fluid is supplied into the adjustable volume portion  11200 . 
     The inflatable membrane  11100  may be composed of polymer. For example, an elastic material such as polyester, polyimide, or silicon, which is the material of a balloon catheter used in angioplasty or urethral dilation, may be used. 
       FIG. 5  is cross-sectional view of a modification of the oral cavity insertion member  11000  shown in  FIG. 4 . While the oral cavity insertion member  11000  shown in  FIG. 4  is positioned in front of the throat  1130  of the patient  1000  such that fluid is prevented from entering the throat  1130 , the oral cavity insertion member  11000  shown in  FIG. 5  includes a convex portion  11110  which is inserted into the throat  1130  of the patient  1000 . 
     The convex portion  11110  serves to prevent washing liquid or saliva that is not blocked by the oral cavity insertion member  11000  shown in  FIG. 4  from entering the throat  1130 . 
     Therefore, the size of the convex portion  11110  when the adjustable volume portion  11200  is expanded may be set to be slightly larger than the throat  1130  of the patient. When the convex portion  11110  is inserted into the throat  1130 , the shape of the convex portion may change like a balloon. 
     Further, when the convex portion  11110  is inserted into the throat  1130 , it may cause the patient to emesis. Therefore, mucous fluid, which is generally applied on an endoscope in an endoscopy, may be applied on the surface of the convex portion  11110 . 
       FIG. 6  is a perspective view of an assistant apparatus for oral treatment according to another example embodiment of the present invention.  FIG. 7  is a cross-sectional view of an oral cavity insertion member of  FIG. 6 , taken along a line II-II′. 
     The oral cavity insertion member  11000  is divided into an adjustable volume portion  11200  and a fixed volume portion  11300 . 
     The adjustable volume portion  11200  is fixed to the outer circumference (circular arc) of the fixed volume portion  11300 , like the tire on an automobile wheel. 
     A fluid-injection coupling terminal  10100  is provided in a predetermined region of the adjustable volume portion  11200 . The adjustable volume portion  11200  is expanded by fluid (preferably, air) supplied by the fluid supply  21000  to adhere an inflatable membrane  11100  to the skin inside the oral cavity. 
     The fixed volume portion  11300  is formed of a material having a lower elasticity than the adjustable volume portion  11200 . Any material may be used as long as it is not harmful to the body. In this example embodiment, silicon is used. 
       FIG. 8  is a perspective view of an assistant apparatus for oral treatment according to a further example embodiment of the present invention.  FIG. 9  is a cross-sectional view of an oral cavity insertion member of  FIG. 8 , taken along a line III-III′. 
     The oral cavity insertion member  11000  is roughly divided into an adjustable volume portion  11200  and a fixed volume portion  11300 . 
     The adjustable volume portion  11200  is fixed to the outer circumference (circular arc) of the fixed volume portion  11300 , like a tire on an automobile wheel. 
     A fluid-injection coupling terminal  10100  is provided in a predetermined region of the fixed volume portion  11300 . The adjustable volume portion  11200  is expanded by fluid (preferably, air) supplied by the fluid supply  21000 . More specifically, the adjustable volume portion  11200  is expanded through a first fluid passage portion  11310  provided inside the fixed volume portion  11300  and one or more fluid injection holes  11320  formed in a region where the fixed volume portion  11300  and the adjustable volume portion  11200  are coupled to each other, thereby adhering an inflatable membrane  11100  to the oral cavity. 
     The fixed volume portion  11300  is formed of a material having a lower elasticity than the adjustable volume portion  11200 . Any material may be used as long as it is not harmful to the body. In this example embodiment, silicon is used. 
     As its name indicates, the volume of the fixed volume portion  11300  is fixed. Actually, the volume of the fixed volume portion  11300  may change somewhat due to an increase in internal pressure of the first fluid passage portion  11310 , even though the amount of change is less than the adjustable volume portion  11200 . 
       FIG. 10  is a perspective view of an assistant apparatus for oral treatment according to still another example embodiment of the present invention.  FIG. 11  is a cross-sectional view of an oral cavity insertion member of  FIG. 10 , taken along a line IV-IV&#39;. 
     The example embodiment of  FIGS. 10 and 11  has an additional structure for increasing an adhesive force between an inner surface of the oral cavity  1100  of a patient  1000  and the oral cavity insertion portion  11000 , which has been described with reference to  FIGS. 3 to 12 , and it can be combined with the structures of  FIGS. 3 to 12 . 
     An oral cavity adhesion portion  11400  is fixed to the outer circumference (circular arc) of an adjustable volume portion  11100 , like a rubber band which is formed on a plastic wheel of a toy car to increase traction. 
     The oral cavity adhesion portion  11400  includes fluid suction holes  11420  through which air is suctioned to make the oral cavity adhesion portion  11400  adhere to skin inside the oral cavity  1100 , or preferably, to the soft palate, due to the suction force. A fluid suction unit  22000  is coupled to the oral cavity adhesion portion  11400  through a fluid transfer tube  42000  and a fluid-suction coupling terminal  10200 . 
     The oral cavity adhesion portion  11400  has an empty space and includes a second fluid passage portion  11410  connected to the fluid-suction coupling terminal  10200 . It also has one or more fluid suction holes  11420  which are connected to the second fluid passage portion  11410  and exposed to the outside to adhere to the inner surface of the oral cavity  1100 . 
     The oral cavity adhesion portion  11400  may be formed in a ring shape. In this case, the overall length of the ring-shaped oral cavity adhesion portion  11400  should increase in proportion to the increasing volume of the adjustable volume portion  11200 . Therefore, the oral cavity adhesion portion  11400  is preferably formed of polymer or silicon with elasticity. More preferably, the oral cavity adhesion portion  11400  is formed of a material having the same or less elasticity than the inflatable membrane  11100  of the adjustable volume portion  11200 . 
     The oral cavity adhesion portion  11400  may be formed in a belt shape with an opening portion (that is, a shape similar to a horseshoe magnet). 
     The oral cavity adhesion portion  11400  may be formed in a wing shape which protrudes with a small thickness to correspond to the outer circumference (circular arc) of the adjustable volume portion  11200 , like oral cavity insertion members according to other example embodiments of the present invention which will be described below with reference to  FIGS. 13 to 14 . 
     For the fluid suction unit  22000 , a separate pump or an air pump included in the unit chair may be used. When a separate pump is used, it may be a manual or electric pump. 
     In this example embodiment of the present invention, an air pump included in the unit chair, that is, a suction instrument which is generally used in dental treatment, is used as the fluid suction unit  22000 . 
       FIG. 12  is a diagram showing the structure of the fluid supply according to an example embodiments of the present invention. 
     In the fluid supply  21000  of the assistant apparatus for oral treatment according to the example embodiments of the present invention described with reference to  FIGS. 1 to 11 , fluid with a positive pressure generated by the fluid compressor  21100  is supplied to the oral cavity insertion member  11000  through the fluid transfer tube  41000 . 
     The fluid supply  21000  includes a pressure adjuster  21200  which constantly maintains the internal pressure of the oral cavity insertion member  11000  to maintain the expanded volume of the oral cavity insertion member  11000 . It also includes a discharge unit  21300  that has a pressure discharge pin  21310  and discharges the fluid supplied to the oral cavity insertion member  11000  to the outside, in order to easily remove the oral cavity insertion member  11000  from the oral cavity  1100  after the oral treatment. 
     In an emergency during treatment, a healthcare practitioner removes the pressure discharge pin  21310  such that the fluid supplied to the oral cavity insertion member  11000  is forcibly discharged to the outside to reduce the volume of the oral cavity insertion member  11000 . Then, the oral cavity insertion member  11000  is removed from the oral cavity. 
     For the pressure adjuster  21200 , a mechanical relief valve is generally used to set a predetermined pressure. 
       FIGS. 13 to 21  are diagrams for explaining oral cavity insertion members according to other example embodiments of the present invention. 
     In the oral cavity insertion member  11000  described with reference to  FIGS. 2 to 12 , the volume is altered by a provided positive pressure. 
     Therefore, the oral cavity insertion member  11000  easily fits into the oral cavity structure of each patient. However, the oral cavity insertion member  11000  may be torn by a sharp instrument such a drill or pick during oral treatment. 
     An oral cavity insertion member  12000 , which will be described below with reference to  FIGS. 13 to 21 , adheres to the oral cavity  1100 , or preferably, to the soft palate, due to a negative pressure, thereby preventing washing liquid or saliva from entering the throat. 
     The oral cavity insertion member  12000  is roughly divided into a body portion  12100  and an oral cavity adhesion portion  12200 . 
     The body portion  12100  includes a fluid-suction coupling terminal  10200  which is coupled to a fluid transfer tube  42000  for providing a negative pressure, and a connection path  12500  which connects the oral cavity adhesion portion  12200  to the coupling terminal  10200  to transfer the negative pressure to the oral cavity adhesion portion  12200 . 
     The body portion  12100  may be formed of a material which maintains a predetermined shape with respect to an external load but is not excessively rigid. In this example embodiment, silicon is used. 
     As the oral cavity insertion member  12000  adheres to the oral cavity  1100  in front of the uvula  1120 , or preferably, to the soft palate, the rear surface  12120  of the oral cavity insertion member  1200 , that is, a surface of the body portion  12100  opposite to the coupling terminal  10200 , may come in contact with the uvula  1120  and cause the patient  1000  to emesis. To solve this problem, the surface  12120  of the body portion  12100  opposite to the coupling terminal  10200  may be flat or concave. 
     The body portion  12100  may be formed to have a larger area or width than the throat  1130  such that the oral cavity insertion member  12000  is prevented from entering the throat. 
     The oral cavity adhesion portion  12200  includes fluid suction holes  12220  which are connected to the connection path  12500  of the body portion  12100  and provided on a surface  12212  opposite to a surface  12211  of the body portion  12100  including the coupling terminal  10200 . 
     The oral cavity adhesion portion  12200  has to easily adhere to the surface of the oral cavity, and may be bent to correspond to the oral cavity structure of the patient. Therefore, the oral cavity adhesion portion  12200  may be thinner than the body portion  12100  and elastic. In this example embodiment, both the oral cavity adhesion portion  12200  and the body portion  12100  are formed of silicon. 
     The oral cavity insertion member  12000  includes a respiration hole  12300  which passes through the body portion  12100  and is blocked from the connection path  12500  within the body portion  12100 . Therefore, when the oral cavity insertion member  12000  is inserted into the oral cavity, the patient can breathe through the mouth as well as the nose. 
     At this time, since the patient  1000  lies in the unit chair for oral treatment, the respiration hole  12300  may be formed to protrude from the front side of the body portion  12100 , that is, the surface  12110  including the fluid-injection coupling terminal  10200 , such that washing liquid or saliva in the oral cavity  1100  is prevented from entering the patient&#39;s throat through the respiration hole  12300  included in the body portion  12100 . 
     Further, the respiration hole  12300  may have a thin film formed at its leading end. The thin film is cut in a cross (+) shape such that washing liquid jetted onto the teeth of the patient during treatment is prevented from splashing and entering the throat of the patient through the respiration hole  12300 . 
       FIG. 15  is an exploded cross-sectional view of the oral cavity insertion member  12000  shown in  FIGS. 13 and 14 . 
     The body portion  12100  and the oral cavity adhesion portion  12200  of the oral cavity insertion member  12000  according to an example embodiments of the present invention may be formed as one integrated body. 
     That is, the surfaces  12120  and  12212  corresponding to the throat side and the surfaces  12110  and  12211  including the coupling terminal  10200  are injection-molded of silicon and then bonded to each other through bonding portions  12400 . 
     In this case, the coupling terminal  10200 , which is included at the surface  12110  of the body portion  12100 , may have a screw thread formed therein to be easily coupled to the fluid transfer tube  42000  connected from the fluid suction unit  22000 . The screw thread may be a female screw thread formed inside the coupling terminal  10200 , as shown in  FIG. 11 , or a male screw thread formed outside the coupling terminal  10200 . 
       FIG. 16  is a diagram illustrating the rear surface of the oral cavity insertion member  12000  according to an example embodiments of the present invention, that is, a surface close to the throat when the oral cavity insertion member is inserted into the oral cavity.  FIG. 17  is a diagram illustrating the front surface of the oral cavity insertion member  12000 , that is, a surface including the coupling terminal  10200 . 
     Referring to  FIGS. 16 and 17 , the fluid suction holes  12220  of the oral cavity insertion member  12000  are included in only one side surface of the oral cavity adhesion portion  12200 , that is, the surface  12212  of the oral cavity adhesion portion  12200  close to the throat when the oral cavity insertion member  12000  is inserted into the oral cavity. 
       FIG. 20  is a 3D-modeled perspective view of the oral cavity  1100  before the oral cavity insertion member  10000 ,  11000 , or  12000  according to an example embodiments of the present invention is inserted.  FIG. 21  is a 3D-modeled perspective view of the oral cavity  1100  when the oral cavity insertion member  10000 ,  11000 , or  12000  is inserted. 
     The oral cavity insertion member  10000 ,  11000 , or  12000  according to an example embodiments of the present invention may be connected to the fluid supply  21000  or the fluid suction unit  22000  through the fluid transfer tube  41000  or  42000 . Alternatively, the oral cavity insertion member  10000 ,  11000 , or  12000  may be inserted into the oral cavity without being connected to the fluid supply  21000  or the fluid suction unit  22000 . 
     When the oral cavity insertion member  10000 ,  11000 , or  12000  is inserted into the oral cavity without being connected to the fluid supply  21000  or the fluid suction unit  22000 , a handle or the like may be provided to easily insert or remove the oral cavity insertion member  10000 ,  11000 , or  12000 . The handle will be described below with reference to  FIG. 24 . 
       FIG. 22  is a perspective view of an assistant apparatus for oral treatment including dental treatment and a unit chair equipped with the same according to an example embodiment of the present invention. 
     The unit chair  50000 , which is generally used for dental treatment, typically includes two fluid suction instruments which provide high and low pressure, respectively. 
     The assistant apparatus according to an example embodiments of the present invention may be formed similar to an instrument such as a drilling tool in the unit chair  50000 . A suction  51000  connected to the fluid suction unit may be removed, and the oral cavity insertion member  10000 ,  11000 , or  12000  (preferably the oral cavity insertion member  12000  which has a suction function) may be connected to the fluid transfer tube  42000 . 
     The assistant apparatus may further include a connector  30000  for facilitating the connection. 
     A coupling method using the connector will be described with reference to  FIG. 23 , which illustrates a region VII of  FIG. 22  represented by a dotted line. 
     The connector  30000  includes two terminals. Between them, one terminal  32000  is coupled to the second fluid transfer tube  42000  connected to the fluid suction unit of the unit chair  50000 , and the other terminal  32100  is coupled to the first fluid transfer tube  41000  connected to the oral cavity insertion member  10000 ,  11000 , or  12000  (preferably the oral cavity insertion member  12000  which has a suction function). 
     The connector  30000  may include a terminal  32200  which is coupled to a third fluid transfer tube  42200  connected to the removed suction  51000 , in addition to the one terminal  32000  which is coupled to the second fluid transfer tube  42000  connected to the fluid suction unit of the unit chair  50000  and, the other terminal  32100  which is coupled to the first fluid transfer tube  42100  connected to the oral cavity insertion member  10000 ,  11000 , or  12000 . 
     The connector  30000  may include a control lever  31100  for controlling a negative pressure provided from the fluid suction unit. The negative pressure provided to the oral cavity insertion member  12000  can be controlled by the control lever. 
     Further, the connector  30000  may include a pressure control valve which is generally used for controlling pressure (negative pressure). 
     Further, when an electric/electronic pressure control valve is used instead of a mechanical pressure control valve, the connector  30000  may further include an on/off switch  31200  for turning power on/off. 
       FIG. 24  is a perspective view of an assistant apparatus for oral treatment according to still another example embodiment of the present invention. In this example embodiment, the oral cavity insertion member  10000 ,  11000 , or  12000  is not used in a state in which it is connected to the fluid supply  21000  or the fluid suction unit  22000 , but is used in a state in which it is inserted into the oral cavity of a patient. 
     The assistant apparatus for oral treatment includes a handle  60000  for inserting or removing the oral cavity insertion member  10000 ,  11000 , or  12000 . 
     The handle  60000  includes a handle body  61000  which is coupled to one surface of the oral cavity insertion member  10000 ,  11000 , or  12000 , and a grip portion  62000  which has an irregular portion formed opposite to the handle body  61000  to be easily gripped by a healthcare practitioner. 
     To more easily remove the oral cavity insertion member  10000 ,  11000 , or  12000  from the oral cavity, the handle  60000  may further include a hook  63000  formed on a predetermined region of the handle body  61000 . 
     The assistant apparatus for oral treatment may be constructed in such a manner that the oral cavity insertion member  10000 ,  11000 , or  12000  can be separated from the handle  60000 . In this case, after the oral cavity insertion member is inserted into the oral cavity, the handle  60000  can be separated from the oral cavity insertion member. 
     Further, an adhesive material may be applied to a surface facing the throat of the patient, opposite to the oral cavity insertion member  10000 ,  11000 , or  12000  to which the handle  60000  is coupled. Then, the oral cavity insertion member can be attached to skin inside the oral cavity when the oral cavity insertion member is inserted. 
     In the oral cavity insertion members described above with reference to  FIGS. 13 to 19 , a negative pressure does not need to be used. Therefore, the connection path  12500 , the fluid suction holes  12220 , etc. may be excluded. 
     The oral cavity adhesion portion  12200  formed on the outer circumference (circular arc) of the body portion  12100  maybe thin, wing-shaped and injection-molded together with the body portion  12100  as one integrated body. 
     In the drawings and specification, typical exemplary embodiments of the invention have been disclosed, and although specific terms are employed, they are used in a generic and descriptive sense only and are not for the purposes of limitation, the scope of the invention being set forth in the following claims.