maxillary sinus floor lift

In the maxillary molar area, especially the distance from the maxillary sinus floor to the alveolar ridge is too small, when there is insufficient bone tissue support, the maxillary sinus floor implants are generally used to solve the problem that the implant cannot be planted due to insufficient bone mass. Bone or implanted artificial bone, the best effect of autologous bone, often preferred autologous humerus. Treating diseases: dental disease Indication Maxillary sinus lift is suitable for: 1. The molars, the premolars are missing, and the alveolar ridge is extremely atrophied. The bone mass between the maxillary sinus floor and the alveolar ridge is <10 mm and the implant implant is required in this area. 2. The distance between the maxillary and alveolar sockets is within the allowable range of denture repair. If the distance between the jaws is too long, the alveolar bone should be implanted. If the distance between the jaws is too long and the maxillary retraction is reversed, Lefort I is required. The type of bone graft was lowered and moved forward, and the bone was planted in the gap. Preoperative preparation In addition to comprehensive examination of the patient's general condition, such as blood, blood pressure, pulse, respiration, electrocardiogram, chest fluoroscopy, liver and kidney function, etc., the size of the jaw bone, the shape of the jaw keel, and the occlusion of the dentition or jaw dyke should be examined. Relationship, distance between the jaws, etc., and the size of the jaw bone, the ratio of cortical bone and cancellous bone, the inflammation of the maxillary sinus, the position of the sinus floor, the position of the pupil and the mandibular canal should be understood by X-ray film. Take X-ray surface tomogram and calculate the distance from the base of the maxillary sinus to the alveolar ridge according to its magnification. The upper and lower jaw plaster model should also be taken to transfer the patient's oral relationship to the frame, and the position, number and distribution of implant placement should be determined on the plaster model. Teeth should be thoroughly examined and treated, routinely cleaned before surgery, and 2% iodine or 0.2% iodophor should be used for oral disinfection, but 7% ethanol must be used for deiodination because iodine is harmful to metal implants. This method is used for delayed planting, and implants should be performed 4 months after surgery. For mandibular total denture prostheses, the distance between the two pupils should be determined before surgery to determine the number of implants and their spacing. Surgical procedure 1. Incision: From the maxillary canine to the first molar, the cheek and sulcus are incision, the mucosa and periosteum are incision, and the mucoperior flap is separated and the maxillary sinus is exposed, and the infraorbital nerve is not injured. 2. Drill a rectangular window with a 2 mm diameter ball on the bone surface according to the size of the sinus cavity. Only penetrate the bone wall when drilling, do not damage the mucosa. Except for the upper boundary of the window, the other three sides are connected by a small osteotome or a micro bone saw. 3. Separate the upper bone graft from the maxillary sinus floor, and use a suitable nasal mucosa stripper to carefully separate and push the sinus mucosa until the height of the bone graft. Generally, it can be moved up 1.5cm, remember not to pass through the maxillary sinus mucosa. 4. Repair the tissue below the bone wall so that the bone graft can be placed in place. 5. Take half of the autologous humerus or allogeneic bone, and trim it so that it is consistent with the bone graft. It should be implanted into the maxillary sinus floor and should be tightly connected without gaps. 6. Separate the periosteal flap along the incision of the buccal groove to the temporal side, expose the alveolar surface of the alveolar bone, and drill the hole in the designed position. At the same time, use your fingers to firmly resist the bone graft and make it drill through at the same time. Screw the implant into place and act as a fixed bone. If it is delayed planting, it is fixed with fine steel wire, or the bone graft is fixed in the non-planting area with titanium screws. After 8 months, the hole is drilled from the alveolar ridge and the implant is implanted. complication 1. Nasal bleeding: non-sinus mucosal injury usually stops the next day. 2. Infection: Caused by sinus mucosal damage, severe cases can cause failure.

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