Implant transplant after open sinus surgery with bone graft
Implantation after open sinus surgery with bone graft (Vietnam Journal of Medicine, Vol. 1, pp. 98-101).
Prof. Dr. Vo Van Nhan
Opened sinus fracture with bone graft is a technique to increase maxillary bone thickness in dental implant technique. There are 2 methods: 1 technique: lift the sinus and place the implant at the same time and technique 2: lift the sinus, bone graft after 3 months implant
From 2007 to 2013, we conducted open sinus surgery for 61 patients: 39 males and 22 females, aged from 18 to 61 years old. These patients have a bone height of less than 8mm. Of these, 67 were surgically implanted, 1 were implanted and 19 were implanted and 2 implants were placed. Patients were monitored over 2 years. As a result, 120 implants were placed, including 117 implant (97.5%), 3 implant failure (2.5%). There is no perforation of the sinus membrane. Infection one case accounted for 1.16%, one case accounted for 1.16%.
Sinus lift for 61 patients (39 male and 22 female) ranging in age from 18 to 61. These patients had residual bone height from 1mm to <8mm. There were 67 sinuses were lifted in one-stage procedure and 19 sinuses were lifted in two-stage procedure. Follow-up time is over 2 years. Result: Of 120 implant were placed, 117 implant were survival (97.5%), 3 implant were failed (2.5%). No membrane preforatetion. Infection (1.16%), dehiscenced flap (1.16%) were also recorded.
Keywords: external sinus lift, one-stage and two-stage implant placement.
Dental implant is a technique that results in chewing, aesthetics and good pronunciation. Therefore, this technique is growing. However, the bone at the implant site should be sufficiently thick (> 10 mm). There are many ways to increase bone thickness, but the method of open sinus surgery is the most effective and easy to control.
At present, thanks to the improved implant design to create the compression of the bone between the bone and the implant neck to achieve initial stability, it is possible to place the implant at the same time as the sinus lift, even when the bone height remains from the bone crest. The size of the sinus cavity is 1-2mm.  However, at present, there are not many studies on this field.
Evaluation of success rate when placing the implant with the original bone height group: 1-2mm; 3-5mm and 5-8mm.
- Assess complications: perforation, infection and disability.
I. OBJECTIVES AND RESEARCH METHODS
1. Research objects
The study was conducted on 61 patients, including 39 men and 22 women, aged 18 to 61 years.
a. Criteria for selecting patients
Bone height remaining 1-8mm
Periodontal status: There is no acute periodontal inflammation.
Good general health, well-controlled medical conditions. Stable posture.
b. Exclusion criteria
The sinus cavity. Sinus mucosa decreases function or scarring due to trauma, surgery.
Having sinusitis (chronic or acute sinusitis, cysts, lumps)
After radiotherapy dose over 45 Gy. Immunotherapy. Smoke over 20 cigarettes a day
2. Research methodology
2. Study, description of cross section
2.2.1 Equipment, materials:
Dental car seat machine, ultrasonic bone cutting machine, open sinus lift.
Bone (pelvic bone or bones in the mouth) combined with bone and synthetic material HA & β tricanxium phosphate.
Self-absorbing collagen membrane Salvin oralmem®absorbable collagen membrane.
Implant: Implan of Korean DIO (RBM surface).
Length: 10-14mm, diameter 3.5-4mm
Open an oval sinusoidal window on the side of the sinus in case of needing to lift the sinus from the first small tooth to the 7th tooth, opening two windows, one small first molar and one large first molar, keeping the bone between the two sinus windows to increase the rigidity of the lateral wall and the maturity of the grafted bone.
Using a Tungsten round drill bit and a slow-speed drill, combined with an ultrasonic bone cutter to open the sinus window to speed up work and reduce the risk of perforation, then use a hand-held instrument to lift the sinus membrane. Always open the window so that the wall is 3mm deep at the bottom of the sinus cavity for easy viewing in the sinus cavity and to retain bone grafts. Sinusoidal bone filling according to technical requirements.
The implant placement is smaller than the implant diameter and uses a threaded implant, multiple implant in the implant neck region, rough surface implant to increase pressure on the neck to stabilize the initial placement of the implant by hand tools. control direction and sense of initial stability. Implant placement is marked by surgical gut. Get collagen membrane. Retrofitting the flap
2.3 Criteria for evaluation
Measure the height of the jaw bone: X ray Cone beam
Determination of firmness between Implant and jaw bone: Force tool
II. RESEARCH RESULTS
From December 2007 to June 2013, 61 patients (39 males and 22 females) were implanted with sinus implants.
A total of 120 DIO implants have been placed. Implants have initial stabilization depending on the initial bone height but they reach 20N / cm or more. Successful implantation of 117 implants accounted for 97.5%, 3 failed implants accounted for 2.5%. (Table 1)
At the height of the remaining bone 1-2 mm, 39 implants were placed, 37 implants were successful (94.9%), 2 implants failed (5.1%). With 56 mm implant placed, 55 implant succeeded (98.2%), 1 implant failed (1.8%). As the bone height left over 5mm, 25 implants were placed, 100% success, no failure cases (Table 1). Fisher's test showed that the success rate for bone height was statistically significant. (p <0.05).
There were 67 cases of one sinus lift, 94 implants were placed, 92 implants were successful (97.9%), 2 failed implants (2.1%). There were 26 implants, 25 implants were successful (96.1%), 1 failed (3.9%) (Table 2). The Fisher test showed no significant difference millet between 2 techniques. (p <0.05).
Table 2: Success rate of implant and failure according to type of sinus lift
Average follow-up time: 24.7 months (the longest: 75 months, the shortest: 4 months).
There were 3 cases of failure, including 3 implants used:
1 case of failure before restoration with the remaining bone 4 mm, failure of 8 months after the implanted sinus lift.
2 cases after complete restoration. There was one case with the remaining bone height of 3mm, failure after 27 months of restorative load, the remaining case with the remaining 1.3mm bone failure after 8 months of restorative load.
Infection: 1 case accounted for 1.16%, infection 10 days after surgery and lead to implant failure. Opened 1 case accounted for 1.16%.
Sinus implants have become a good prognosis for the placement of dental implant in the posterior region of the jaw on the bone. At the consensus meeting on the issue of sinus elevation held in Germany in 1996, when bone height remained 1-3mm lifted sinus 2, when the remaining bone height from 4-6mm indicated to lift the sinus 1 This is to ensure that the implant is stabilized initially, when the bone height remains from 7 mm to the closed sinus. 
However, 10 years later, in 2006, Peleg and his colleagues published a study of 9-year follow-up sinus surgery for 731 patients with 2,132 implants successfully placed on 97.9% of implants. There were 3 groups: group 1 had 1-2mm bone height with success rate of 95.9% (failure 4.1%); Group 2 from 3-5mm had a success rate of 98.5% (failure of 1.5%) and group 3 had a bone height of more than 5mm with a success rate of 98.4% (failure of 1.6%).  Compared to the study by Peleg et al., This study achieved a success rate of 97.5% (equivalent to Peleg's results). In the group of 1-2mm, the success rate reached 94.4%, implant failure of 5.1%; In the group of 3-5mm, the success rate was 98.2%, the implant failure was 1.8%, the group over 5mm to less than 8mm achieved the success rate of 100%, no implant failure. The study found that the success rate of implantation in group 3 (100%) was higher in Peleg's study but the follow-up time was shorter. Different failure rates for 3 different bone heights were 5.1%, 1.8% and 0% for implant placed in the 1- 2mm, 3-5mm and 5mm region. <.0.05). Although the rate of failure was higher in the 1- 2mm bone group than in the other two groups, the incidence was very low for this very complex clinical condition.
When the bone is 1-2mm, it is a challenge to place the implant at the same time at the same time as the sinus lift and sinus transplant. In this case, almost one open sinus surgery technique can only be performed when the other bone is of good quality. Indeed, in our study, only one to one of the patients with 1 to 2 mm of bone was exposed to open sinus surgery. The remaining 14 patients had to undergo a 2-point procedure.
The success rate of this study (97.5%) was achieved by creating a sinusoidal sinus cavity, the lower wall of the sinus at the base of the 3 mm sinusoidal cavity, which allows for retention of the grafted material. into the sinuses. Combination of rotary instruments and ultrasound instruments to shorten the opening time of the window, and open the oval window should ensure the safety of perforation of the sinus membrane, combined with the opening of two windows when the need to lift the sinus Large and wide, this ensures the stability of the lateral wall of the sinus, retaining many of the true bone walls that heal rapidly following the bone-building mechanism. Bone grafts placed in contact with the implant surface, bones themselves are considered as gold standard for grafting materials, careful bone compression, long implant placement, multiple implant placement in the neck region ( The RBM surface implant is an abrasive surface treated by hydroxy apatic coating for better surface finish. [4-5] The coating of the grafted material prevents competition. The soft tissues should create a favorable environment for bone growth.
The process of lifting the sinuses, bone grafting can introduce new bacteria into the sinuses and nasal cavities, so antibiotic prophylaxis is required to prevent infection , high doses of antibiotics prior to surgery and good oral hygiene are not limited. postoperative infection but also a significant reduction in surgical implant failure rates of 2.  especially for patients with sinus aspiration [3,6,7]
There is one case of implant failure prior to loading force, one case in which patients with postmenopausal women have severe osteoporosis, thus affecting the integration of the bone. There are two cases of failure after restoration of the restorative force, one case using implants on the implant stand alone in the rear teeth can be overloaded. One case of infection 10 days after surgery in patients who eat betel and smoked, but this patient is treated by opening the pump flush part of the material and antibiotics then the implant is well healed. Only one case of hypertrophy accounts for 1.16%. There is no case of perforation. This is a very low rate probably due to the use of proper sinus surgery. Compared to the rate of perforation of other studies from 0-58%. 
Successful implantation results when the remaining bone size is 5-8mm to 100%, when bone height remains 3-5mm is 98.2% and the remaining bone height from 1-2mm is 94.9%. The difference between the three groups was statistically significant (p <0.05).
The incidence of complications, infections and disabilities was low (1.16%), with no perforation.
The male patient was 54 years old, lost teeth, some teeth loose and painful to eat chewing. Patient demand for fixed dentures including implant treatment. General condition: Patients with good general health do not have diabetes. Habits: Smoking over 20 years. Less than 10 cigarettes a day but stopped smoking five years ago.
Oral examination: Patients have a medium laugh, face and lip contour.
Visits in the mouth and x-rays (Figures 2 and 3)
Teeth on tooth loss 18, 17, 25, 26, 28; 17 teeth gutter slit close to the tooth root, teeth 14.15: deep pockets 7mm, shaking degree 3; Teeth 12, 11, 21, 22 Gingival recession. Lower teeth 36, 47,48 teeth 37 swing level 3, pocket side near 6mm deep.
Image on CT Cone Beam (Figure 4)
Teeth 17, the outer surface of the bone, the inside and the tongue, the tip of the teeth, the sinus cavity
Teeth 14, 15 bone around the root of the tooth, the tip of the tooth to the floor of the sinus
Tooth decay 24 around the root of the tooth and the outside, the tip of the tooth to the floor of the sinus cavity)
27 teeth of the outer surface of the teeth, the inside, the tip of the tooth to the floor of the sinus
Diagnosis: Tooth loss and periodontitis
Treatment plan: (Figure 5)
Tooth extraction 17,14,15,24,27,38 clean up inflammatory granule tissue.
Treatment of periodontal inflammation: tartar scraping, periodontal, antibiotic, anti-inflammatory and mouthwash chlohexidine 0.12% in 7 days. Wait 6 weeks later, lift the sinus, bone graft and implant a transplant at the positions R 16,15,14; R 24,26,27; It also implanted in R37
CT CT scan 6 weeks after extraction
Challenge: bone height remaining from 1 to 3mm sinus screen, it is difficult to put the implant to stabilize initially.
Solution: Choose transplant implant, with surface treatment, multiple threads of the neck implant, (Figure 6). Boreholes are smaller than the diameter of the implant, placing the implant on or resting on the rest of the bone, using the hand-held implant to ease the direction and sense of initial stability.
Technique: Open two oval windows using a rotary device and a window ultrasound (Figure 7), a sinus lift (Figure 8), an implant, a graft and a membrane (Figure 9).
The CT Cone beam survey over 9 months post-surgery (Figure 10)
Soft tissue healing after 9 months (Figure 11)
Surgical imaging revealed 2 months after surgery (Figure 12,13) with good bone integration.
Image of surgical removal of snail 9 months after surgery (Figure 14)
Image 18 months after last restoration (Figure 15, 16)
Panorama image 18 months after last restoration (Figure 17)
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