65 results about "Zygomatic bone" patented technology

The invention discloses an artificial intelligence-assisted standard artificial temporomandibular joint automatic placement method. The method comprises the following steps: training a three-dimensional reconstruction model used for extracting a mandible and zygomatic bone zygomatic arch joint prosthesis placement area; based on an improved 3D U-Net neural network, carrying out segmentation extraction on the interested areas of the glenoid fossa and the mandibular branch, and obtaining a space geometric structure for prosthesis installation; the method comprises the following steps: extracting outer bone surface point cloud data of a zygomatic arch and a mandibular ramus on the basis of a space geometric structure of prosthesis installation, identifying anatomical key points, and generating a standard prosthesis fitting surface through geometric fitting and constrained optimization; determining the relative position relation between the maxillary joint fossa prosthesis and the mandibular branch prosthesis, and determining the installation direction, the hole position definition and the assembly reference point; and determining a contact area, a posture direction and a placement position of the prosthesis, and completing three-dimensional positioning and posture matching of the prosthesis in the patient model as a surgical planning scheme.

The invention provides a zygomatic and wing penetration implantation operation path selection method and device, a medium and a terminal, and the method comprises the steps: setting coordinate information of a plurality of operation path starting points and a target operation region according to the obtained whole head image information of a patient; according to the obtained coordinate information of the multiple preset anatomical points, angle ranges of the multiple preset anatomical points and the target operation area relative to the multiple operation path starting points are obtained through calculation; according to the obtained multiple preset anatomical points and the angle range of the target operation area relative to the multiple operation path starting points, the distances from the operation path to the multiple preset anatomical points are calculated; and according to the calculated distances from the operation path to the plurality of preset anatomical points, calculating to obtain an optimal operation path range and a recommended operation path range. The optimal operation path in the zygomatic and wing penetrating implanting operation process can be calculated, a doctor is assisted in safely and efficiently implementing the zygomatic bone penetrating implanting operation, and the blank of the current market is filled.

The present invention relates to a cheekbone implant having an elongated profile, comprising: an elongated tip portion having a central longitudinal axis for anchoring the implant in the cheekbone of a patient; the crown end part is provided with an internal threaded hole, and the abutment can be meshed with the implant through the internal threaded hole; and an intermediate portion extending between the apical end portion and the crown end portion, the cross-sectional shape of the intermediate portion and / or the crown end portion being oval along a plane perpendicular to the central longitudinal axis.

The utility model provides a head, neck, chest and waist fixer, including front paste fixing piece, back paste fixing piece and binding piece, the front paste fixing piece includes paste chest part, first side waist part, first neck part and face part, the first side waist part extends from the both sides of paste chest part and is used for fitting waist part, and the back paste fixing piece is used for binding the first neck part and the face part. The first neck part extends upwards from the top of the chest fitting part and is used for fitting the neck, the face part extends upwards from the first neck part and is used for fitting the outline of the face, an opening is formed in the front face of the face part, the eyes, the nose and the mouth are exposed through the opening, and the opening is in a T shape. The head, neck, chest and waist fixator has the advantages that the front patch fixing part and the rear patch fixing part are integrally formed, cheekbones and eyebrow bones are used as supporting points on the face, the head, the neck, the chest and the waist are fixed together under the support of the back brain, and the head, neck, chest and waist fixator is better in fitting performance, more stable in supporting point position and higher in comfort.

The invention provides a robot head assembly and a robot, and relates to the technical field of robots. The eye bracket is fixedly connected with the support frame main body; the face support is fixedly connected with the eye support and comprises a cheekbone part and a cheekbone part; the upper jaw part is fixedly connected with the cheekbone part, and the width of the upper jaw part is smaller than that of the cheekbone part; the lower jaw support comprises a lower jaw part matched with the upper jaw part, and the upper jaw part and the lower jaw part are provided with mouth driving tracks; the width of the chin nodule part is larger than that of the lower jaw part, and a gap is formed between the cheekbone part and the chin nodule part; the mouth expression driving part comprises a cheek expression driving part arranged in the gap; a plurality of mouth driving units; a flexible mask; the multiple mouth driving units are configured to drive the mouth expression driving piece to move in the mouth driving track and drive the cheek expression driving piece to move in the gap, so that the flexible mask deforms to generate the mouth expression of the robot head assembly.

The invention discloses a cheekbone implant and an abutment, and relates to the technical field of medical instruments.The cheekbone implant comprises a cheekbone implant body, one end of the cheekbone implant body is provided with a first threaded part, the cheekbone implant body comprises a first rod part, one side of the first rod part is provided with a neck part, one side of the neck part is provided with a second rod part, and the second rod part is provided with a second threaded part; the inner side of the second rod part is provided with a first connecting part, the inner side of the first connecting part is provided with an abutment, the cheekbone implant is a main body of the whole device, is fixed in the cheekbone and is used for providing a stable supporting foundation, the first rod part is used as a transition structure between the first threaded part and the neck part, and the second rod part and the first connecting part are used for positioning and fixing the abutment. The base station is used for containing the base station screw, tight connection between the base station and the cheekbone implant is achieved, the cheekbone implant is anchored in the cheekbone through the thread, fixation of the implant is achieved, the postoperative infection risk is reduced, and a better treatment effect can be provided for a patient.

The invention discloses a cheekbone and zygomatic arch fracture reduction guide plate, and relates to the technical field of cheekbone and zygomatic arch reduction, the cheekbone and zygomatic arch fracture reduction guide plate comprises a guide plate body and a fixing structure, the guide plate body is provided with an attaching inner surface matched with the anatomical form of an affected side cheekbone and zygomatic arch bone surface in a target reduction form; the fixing structure is arranged on the guide plate body and used for fixing the guide plate body to the healthy bone surface around the zygomatic arch of the diseased side cheekbone, the problems that in the prior art, operation trauma is large, accuracy is low, the reduction effect is not ideal and the like are solved, and the zygomatic arch fracture reduction fixing operation is completed accurately, safely and efficiently.

The utility model relates to the technical field of life cultivation and health preservation tools, in particular to a multifunctional head and face tendon shifting and scraping therapy device. Comprising a holding rod, one end of the holding rod is provided with a spherical first massage part, the other end of the holding rod is provided with a scraping therapy plate, and the side edge, away from the holding rod, of the scraping therapy plate is an arc-shaped scraping therapy part; the two ends of the scraping therapy part are fillets and serve as second massage parts respectively. According to the multifunctional head and face tendon poking and scraping therapy device, the spherical first massage part is arranged to conduct tendon poking and acupoint hitting, key acupoints and main and collateral channels are beaten, poked, pressed and kneaded, and the arc-shaped scraping therapy part is arranged to conduct scraping therapy on the forehead, the upper edge and the lower edge of eye sockets, the lower jaw, the cheekbones in front of ears and behind ears, the neck and other positions. Compared with a traditional fan-shaped scraping therapy plate, the scraping therapy plate can be attached to multiple positions such as the face and the neck of a person more easily, use is more convenient, the second massage parts at the two ends of the scraping therapy part can be used for acupoint pressing, pushing and pressing and the like, multiple functions are achieved, scraping therapy, acupoint pressing, tendon poking, pushing and pressing and other operation can be conducted, and practicability is higher.

The invention relates to a calibration device for ophthalmology imaging equipment, and relates to the field of ophthalmology imaging related technologies, and the calibration device comprises an imager, a head bracket, a movable support frame, a jaw support, a forehead support, a linkage mechanism and a calibration mechanism. When a patient needs to finely adjust the head angle due to discomfort, the jaw support cannot rotate along with the patient, local pressure concentration is easily caused, friction burning pain is generated, and the adaptability of the patient is affected; secondly, symmetrical straight line clamping or simple cushion block supporting is mostly adopted for lateral positioning, adaptability to face contour changes of cheekbones, jaw bones and the like is lacked, and positioning deviation or oppression discomfort is easily caused; and thirdly, the problems that the existing device lacks a multi-direction linkage automatic calibration mechanism, manual intervention is needed for multiple times in operation, the calibration precision and efficiency are low, and the alignment requirement of high-precision ophthalmology imaging is difficult to meet are solved.

The utility model discloses a zygomatic bone implant positioning bow, and belongs to the technical field of zygomatic implantation. The utility model relates to a cheekbone implant positioning bow which comprises a main bow frame, a guide sleeve and an adjusting piece. One end of the main bow frame is provided with a lower port, the lower port is provided with a guide sleeve, an adjusting piece is arranged outside the guide sleeve, the guide sleeve is provided with a through first hole body, the adjusting piece can move relative to the first hole body, and the middle of the adjusting piece is provided with a second through hole which is coaxial with the adjusting piece and penetrates through the two ends of the adjusting piece. Due to the structural design of the zygomatic implant positioning bow, especially the combination of the main bow frame and the adjusting piece channel, the precise positioning and implanting process of the zygomatic bone implant is optimized. Through rigidity and adjustable design of the bow frame, the positioning bow can adapt to anatomical structures of different patients, safety and accuracy of an operation are improved, and positioning errors in the operation are reduced.

The utility model discloses a glasses structure of cheekbone support relates to glasses technical field, the glasses structure of cheekbone support includes frame subassembly and temple subassembly, temple subassembly includes two temple, each temple includes connecting piece, strutting piece and ear hook piece, connecting piece extension direction both ends are connected with strutting piece and frame subassembly one end respectively, connecting piece extension direction both ends are connected with the ear hook piece, connecting piece extension direction both ends are connected with frame subassembly one end respectively, connecting piece extension direction both ends are connected with frame subassembly one end respectively, connecting piece extension direction both ends are connected with frame subassembly one end respectively. The ear hook piece is connected to the end, away from the connecting piece, of the supporting piece, the ear hook piece is used for wearing the glasses structure for supporting the cheekbone on the ear, a supporting face is formed on the side, facing the head, of the supporting piece, and the supporting face is used for abutting against the cheekbone part; according to the scheme, the glasses can be stably worn on the ears through the arrangement of the ear hook pieces and the supporting pieces, and the pressure of the ears can be relieved through additional supporting force provided by the contact between the supporting surfaces and the cheekbones; the cheekbone part and the ear part support the weight of the glasses, so that the compression of the conventional glasses with nose pads on the nose bridge is avoided, the discomfort caused by overlarge local stress is reduced, and the wearing experience of a user is improved.

1. The name of the design product: traction hook (zygomatic implant). 2. The use of the design product: used for soft tissue flap traction and retention when zygomatic bone implant and maxillary sinus outer lifting, protecting soft tissue and preventing soft tissue slipping. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention relates to a dental implant set, more precisely to a zygomatic dental implant set for in-bone dental implant surgeries of the zygomatic arch via intraoral access. The zygomatic dental implant set (100) comprises an implant pin (10) configured to be anchored in the zygomatic bone; an intermediate connecting member (20) comprising a curved shape; wherein a first end (21) of the intermediate connecting member (20) is configured to be coupled directly or indirectly to the implant pin (10); a first extender (30), wherein the first extender (30) is coupled to a second end (22) of the intermediate connecting member (20); a prosthetic abutment (40), wherein a first end (41) of the prosthetic abutment (40) comprises an outer thread (42), wherein the outer thread (42) of the prosthetic abutment (40) is coupled to a first inner thread (23) of the intermediate connecting member (20); and wherein a second end (43) of the prosthetic abutment (40) is configured to receive a dental prosthesis.

The present disclosure concerns a positioning and stabilising structure for a patient interface, comprising a first textile portion comprising a front section and a rear section, the front section and rear section forming a continuous loop of material; wherein the front section comprises at least one opening and is configured to house a plenum chamber adjacent to the at least one opening; wherein when in use, the first textile portion is movable between a first resting position and a second breathing position, the front section configured to overlay a patient's frontal bone and the first textile portion configured to at least circumferentially and resiliently fit to the patient's head in the first position, and the front section configured to overlay the patient's zygomatic bone and the first textile portion configured to provide a force to hold the plenum chamber in a therapeutically effective position on the patient's head in the second position.

A guide for guided surgery on zygomatic bone implants for dental prostheses includes a half-bushing and a complementary half-bushing which are connected by a pair of bars. The half-bushings and the bars define a common longitudinal median axis between them; the half-bushings have a U-shaped or semicircular cross-section with mutually opposite concavities directed toward the median axis; the half-bushings and the bars form a seat in which it is possible to insert a work member, such as a burr and a subsequent implant, which can move only along the median axis and rotates about an axis of rotation that coincides with the median axis.

The utility model discloses a lateral fixed implant, which relates to the technical field of implants and comprises an implant main body, a fixed cavity is arranged at the top of the implant main body, a fixed needle is arranged in the fixed cavity, and the fixed cavity comprises a cone, an anti-rotation structure, a threaded hole, a first hole, a second hole and a third hole which are sequentially communicated with one another from top to bottom. A first thread is arranged on the outer surface of the implant main body, a fourth hole is formed in the outer surface wall, located on the first thread, of the implant main body, the fourth hole is communicated with the third hole, and the fixing needle comprises a cap head, a rod part, an anti-withdrawing thorn and a tip which are fixedly arranged in sequence from top to bottom. Through double fixation of the lateral fixing needle, the stability of the implant is effectively enhanced, the defects of insufficient retention of the implant and complicated methods such as wing plate and cheekbone implantation are overcome, and the lateral fixing implant can be applied to the situation of insufficient bone mass of maxillary alveolar bones.

The invention relates to the technical field of medical instruments, in particular to a bone holder for cheekbone fracture reduction and a robot-assisted cheekbone fracture reduction method. The bone holder for reduction of the fracture of the cheekbone provided by the invention comprises a fixed end which is provided with at least one fixing hole and is used for being rigidly connected with a bone block through a fixing piece; one end of the connecting rod is fixedly connected with the fixed end, and the other end of the connecting rod is provided with a connecting structure used for being detachably connected with the tail end of the mechanical arm; and the plurality of registration points are distributed on the surfaces of the fixed end and the connecting rod and are used for performing intraoperative registration through a registration tool. According to the bone holder, the application scene is widened, a stable and reliable connection mode is provided, and the foundation of high-precision registration is laid.

The utility model belongs to the technical field of spectacles, and particularly relates to a spectacle frame without nose pads. Comprising glasses legs and a lens frame, the front ends of the glasses legs are rotationally connected to the two ends of the lens frame respectively, the bending assembly comprises a bending body arranged at the rear ends of the glasses legs and a soft cushion layer arranged on the inner side of the bending body, and the bending body is arranged on the outline of an outer ear in a surrounding mode; the supporting assembly comprises a first supporting piece and a second supporting piece, one end of the first supporting piece is connected with the glasses leg, the other end of the first supporting piece is attached to the cheekbone, one end of the second supporting piece is connected with the glasses leg, and the other end of the second supporting piece is attached to the upper skin of the external ear; the first sliding assembly is arranged between the first supporting piece and the glasses leg; the second sliding component is arranged between the second supporting piece and the glasses leg; the first supporting piece is designed to be of a double-layer composite structure. The utility model aims to provide a nose-pad-free spectacle frame which is more stable, more comfortable and high in adaptability.

The invention discloses a surgical instrument for lifting the face of a human body under an endoscope, which comprises a first needling instrument and a second needling instrument, and the first needling instrument and the second needling instrument are matched for use; the first needle is a hollow straight-bar needle with the upper end and the lower end open. The second needling instrument is arranged to be a solid L-shaped rod needle; the second needling instrument is composed of a first needle rod, a second needle rod and a third needle rod. The needle rod II is fixedly connected to the left end of the needle rod I, and the joint of the needle rod II and the needle rod I is rounded; the third needle rod is fixedly connected to the upper end of the second needle rod, and the upper side of the third needle rod is slightly bent rightwards; the second needling instrument and the first needling instrument are used in cooperation, the facial tissue is pulled and lifted firstly, the observation sight of an endoscope is expanded, then the suture line is reserved in the facial tissue through the first needling instrument, and therefore the tissue (a zygomatic fat pad also known as apple muscle) under the cheekbone is sutured, hung and fixed to the temporal in the deep layer (periosteum) through the suture line, and the purpose of fixing the tissue under the cheekbone is achieved. The lifting and fixing of the apple muscle are realized.

An implant (X) for supporting an upper-jaw dental prosthesis (Z) on the cranial bone (S), wherein the implant (X) has a receiving portion (ZA) for receiving the upper-jaw dental prosthesis (Z), and also a plurality of fastening portions (B1, B2, B3, B4), wherein the fastening portions (B1, B2, B3, B4) are connected to the receiving portion (ZA) and have at least one through-hole (DL) for receiving a fastening screw (BT), wherein the fastening portions (B1, B2, B3, B4) are formed at least by a first fastening portion (B1), a second fastening portion (B2) and a third fastening portion (B3), wherein the first fastening portion (B1) is designed to anchor the implant (X) on the lateral cranial base (S1), and wherein the second and third fastening portions (B2, B3) are designed to anchor the implant (X) on one of the following three cranial bone portions (S2, S3, S4): the pterygoid process (S2), the zygomatic bone (S3), and the maxilla (S4).

To provide a method of evaluating whether appropriate cosmetic medical treatment is performed in order to satisfy the need for more efficient, accurate and safer cosmetic medical treatment.SOLUTION: There is provided a treatment method of preventing a nose from being subjected to an excess pressure when an upper cheek bone is appropriately pressed. There is also provided a system that audits the steps of: placing a face band such that a central seam of the face band in a left-right direction is located at the center of the jaw while checking the top and bottom of the face band so that the top is a longer side of an X-shape and the seam comes outside the patient's face, and causing an upper edge of the band on the longer side to come into contact with a lip lower edge; holding the face band in the vicinity of Velcro tape at a longer end, pulling the band upward while being hung on the face through a front side of the ears without hiding the ears, and then fixing the face band which is pulled on the top of head; pinching an appropriate amount of gauze so that the face band equally presses the face; and confirming with the patient whether the face band touches the face to cause pain.SELECTED DRAWING: None

The decompression respirator mask comprises an oral-nasal mask body, a cheekbone supporting frame, a buffering air bag, a nose bridge decompression pad and an air bag inflation valve, the cheekbone supporting frame and the buffering air bag are each of an annular structure, the front end face of the cheekbone supporting frame is connected with the rear end of the oral-nasal mask body, and the rear end face of the cheekbone supporting frame is connected with the buffering air bag; the front end of the oral-nasal mask is provided with an oxygen inlet, the outer wall of the buffering air bag is provided with an opening groove or a stomach tube channel allowing a stomach tube to enter the oral-nasal mask, the buffering air bag is of a sealed structure, the nose bridge pressure reduction pad is arranged on the inner wall of the buffering air bag, and the technical scheme achieves the advantages of oxygen leakage prevention and buffering.

The invention relates to a sanitary mask for protecting a human body, which comprises a rope body binding piece for being fixed on the head of a user, a jaw fixing piece, an angle adjusting piece and a mask piece, and is characterized in that the jaw fixing piece is connected to the rope body binding piece and is fixed at the jaw position of the user so as to be matched with the rope body binding piece to form a supporting structure; the angle adjusting piece is connected to the jaw fixing piece; and the mask piece is connected to the angle adjusting piece. The technical scheme has the advantages that the angle adjusting part is connected to the jaw fixing part, the mask part is connected to the angle adjusting part, and the angle adjusting part drives the mask part to adjust the angle. The cheekbone part can be better attached to the cheekbone part; for people with round faces, the angle can be properly adjusted downwards, it is ensured that the mask is tightly attached to the faces, and the adaptability of the mask to different face shapes is improved. The problem that in the prior art, the mask angle cannot be adjusted according to the use scene, and consequently attaching is not tight is solved.

The utility model relates to the technical field of demonstration devices, and provides a temporomandibular joint simulation demonstration device, which comprises a bottom plate, a cheekbone simulation frame, an upper dental cast, a mandibular simulation frame, a lower dental cast, a push rod and a push assembly, and is characterized in that the cheekbone simulation frame is positioned on one side of the bottom plate through a supporting seat, the upper dental cast is detachably connected to one side of the cheekbone simulation frame, and the lower dental cast is detachably connected to the other side of the mandibular simulation frame; the mandible simulation frame is rotationally connected to the lower side of the cheekbone simulation frame through two rotating seats, the lower tooth mold is detachably connected to one side of the mandible simulation frame through an adjusting seat, the two pushing rods are located on the two sides of the mandible simulation frame respectively, and the mandible simulation frame is provided with grooves for the pushing rods to slide; the push rods can slide on the lower jaw simulation frame conveniently, and the push assembly is arranged between the two push rods. By means of the technical scheme, the problem that in the prior art, the opening and closing simulation demonstration angle cannot be adjusted accurately and conveniently is solved.

The utility model discloses a nasal oxygen cannula which comprises a nasal plug which comprises a cannula section extending into a nasal cavity, a middle section located at one end of the cannula section and wing sections arranged at the two ends of the middle section respectively. The base is detachably connected to the bottom of the middle section; the protecting band is detachably connected to the end part of the wing section, and the protecting band is provided with a cheekbone groove for accommodating the cheekbone bulge; the head band is fixed at the end part of the protective band; the utility model discloses a dressing plaster. In the scheme, after the tube section extends into the nasal cavity, the middle section is of a narrow-end-up structure, so that the middle section is in a tilting posture, the contact area with the skin is reduced, the end part is thicker, and the middle part is thinner, so that the covering area on the skin can be reduced on the premise of ensuring the structural strength; the arrangement of the wing sections can conform to the binding path of the head band so as to reduce the pressure applied to the facial skin, the cheekbone grooves in the protective band can reduce the pressure borne by the skin at the cheekbone position, the shielded end of the head band can reduce the friction of the head band to the skin, and the possibility of skin damage is reduced.

This invention provides a disposable, simple endotracheal intubation fixator for use in the field of endotracheal intubation. It includes a fixation tube with an adjusting sleeve and a threaded bolt connected to its inner wall. A knob drives the threaded bolt to press and adjust the adjusting sleeve, thereby fixing and locking the intubation tube to prevent slippage, displacement, and dislodgement. It employs a biomimetic integrated dental arch design, consisting of upper and lower occlusal plates and an elastic arc strip, preventing occlusal force from directly acting on the intubation tube and dispersing the biting force. Buffer pads are provided on the occlusal plates for cushioning and protection. Suction cups are added to the cheekbone area on both sides of the patient, connected to the fixation tube via an arc-shaped fixation frame. The bony support of the cheekbone reduces stress on facial soft tissues. Non-woven fabric patches are placed on the skin-contacting surfaces of the suction cups to keep the skin dry and clean. Elastic bands are incorporated into the arc-shaped fixation frame for double fixation, making it compatible with the needs of different patient groups and clinical scenarios.

A patient interface can have features improving the comfort of use by reducing the perceived pressure of a nose-contacting cushion of the patient interface against the nose. The patient interface can have rigid headgear connection elements connectable to a frame of the respiratory interface. The rigid headgear connection elements can be shaped to reduce the force of the cushion against the nose. Headgear for a patient interface can also have features improving the stability of headgear of the head. The headgear can have a relatively rigid framework and a relatively pliable overlay covering the framework. The framework can have apertures defining a front portion to be positioned below or near the cheekbones, a rear portion to be positioned over the sides of the head around the ears, and a top portion to extend upward along the head towards the crown.

Guide (1) for zygomatic implant surgery comprising: a pair of guiding bodies (2, 3) defining a seat (4) adapted to house a working tool (5, 6, 7), of which: a first guiding body (2); a second guiding body (3) comprising an half-bushing (8) having a section which is conformed to a semi-circumference; a connecting body (9); wherein: the first guiding body (2) comprises a slotted portion (10) comprising a first extremal stretch (10a), a second extremal stretch (10b) and a joint stretch (10c); the first extremal stretch (10a) has a substantially semi-circumference conformation with concavity opposite that of the half-bushing (8); the extremal stretches (10a, 10b) and the joint stretch (10c) bound an elongated slot (10a, 10b, 10c) adapted to guide the working tool (5, 6, 7).

A cervical orthosis (10) designed to hold the head (3) of an individual at least in the sagittal plane (Exz), wherein the cervical orthosis (10) has a ventral part (11) and a dorsal part (12), which parts are adjustable to each other and can be connected or linked together at least in their predefinable relative positions and can each be supported on the individual; characterized in that the cervical orthosis (10) forms at least by means of the ventral part (11) a rigid receptacle (14) with at least one anatomical negative contour (14a) designed to interact with the zygomatic bone, which is rigid at least with respect to the transverse plane (Exy) such that the cervical orthosis (10) is designed to hold the head (3) of an individual at least also in the transverse plane (Exy).

The invention provides a butterfly wing process separation operation system, and relates to the technical field of medical instruments. Comprising an osteotome suitable for separating the wing process of the butterfly bone; the positioning system is suitable for positioning the displacement direction and position of the osteotome, the positioning system comprises a positioning piece, one side of the positioning piece is provided with a joint face matched with the anatomical form of the outer surface of the cheekbone, and the positioning piece is provided with a guide channel matched with the osteotome; the fixing structure is suitable for fixing the positioning piece; in addition, the bone chisel further comprises a limiting mechanism suitable for limiting the displacement distance of the bone chisel. Through the arrangement of the positioning piece, the joint face matched with the anatomical form of the outer surface of the zygomatic arch of the cheekbone, the guide channel and the limiting mechanism, the positioning piece can be stably attached to the surfaces of the zygomatic arch of the cheekbone of different patients, the osteotome is positioned by adapting to the skeleton features of the different patients, and the limiting mechanism can limit the displacement depth of the osteotome; and the osteotome is prevented from being inserted too deep to injure a patient when the wing process of the butterfly bone is broken.