Maxillary Sinus Elevation Surgery: An Overview
ABSTRACT Maxillary sinus elevation surgery was developed to increase the height of bone available for implant placement in the posterior maxilla. The efficacy and predictability of this procedure have been determined in numerous studies. The basic approach to the sinus (Caldwell-Luc operation) involves an osteotomy performed on the lateral maxillary wall, elevation of the sinus membrane, and placement of bone graft material. The graft materials can be categorized into four groups: autogenous bone, allografts (harvested from human cadavers), alloplasts (synthetic materials), and xenografts (grafts from a nonhuman species). These graft materials can be used alone or in combination with each other. Implant placement can occur at the same surgical procedure (immediate placement) or following a healing period of 6 to 9 months (delayed placement). A more conservative approach to the sinus, the osteotome technique, has been described as well. CLINICAL SIGNIFICANCE: This article provides an overview of the surgical technique, with emphasis on anatomic considerations, preoperative patient evaluation (clinical and radiographic), indications and contraindications to the procedure, and possible risks and complications.
- SourceAvailable from: Partha Saradhi
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- "Several procedures and materials have been developed to overcome the problem of reduced amount of bone like tilted implants, short implants and vertical bone augmentation. But impredictable success rates have been reported with tilted implants and short implants . "
ABSTRACT: Maxillary sinus augmentation surgical techniques have evolved greatly allowing successful placement of dental implants in the atrophic posterior maxillary region. The purpose of the present study is to evaluate the clinical and radiological outcomes and postoperative morbidity of sinus floor elevation procedures performed using the minimally invasive surgical technique the Sinu lift system. Sinus lift procedure was done using the sinu lift system by a transcrestal approach and bone augmentation was done on ten systemically healthy patients using β- tricalcium phosphate and platelet rich plasma mix. The study was evaluated upto six months period with bone related parameters being assessed at base line using CT scan, OPG and after six months the results were analysed using SPSS Version 18.0 software (p < 0.01 (0.005). Wilcoxson signed rank sum test was used to correlate between preoperative and postoperative measurements. Implant placements were done at the desired area of sinus augmentation with a two year follow up. (Nobel Biocare, Nobel Biocare Holding AG, Zürich-Flughafen, Switzerland) Results: The augmented sites had a significant increase in the bone parameters at the desired grafted region. The mean gain in bone height as observed in CT Scan had revealed increased measurements from 5.80mm±0.98 to 10.20mm±1.68 at the sixth month evaluation. This was statistically significant (0.005). Clinically, no complications were observed during or after the surgical procedure. Within the limitations of this study, the Sinu lift system with a controlled working action resulted in high procedural success and this procedure may be an alternative to the currently used surgical methods.03/2015; 9(3):ZC33-7. DOI:10.7860/JCDR/2015/11114.5703
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- "Patients without teeth in the posterior region of the maxilla often present atrophy of the alveolar ridge and pneumatization of the maxillary sinus (Hieu et al. 2010). This condition could jeopardize the correct 3D implant placement, which can be solved through a maxillary sinus bone augmentation (Boyne & James 1980; Misch 1987, 2007; Kaufman 2003; Sorn ı et al. 2005; Chambrone et al. 2013). "
ABSTRACT: This multislice tomographic study evaluated the dimensional changes after maxillary sinus augmentation using autogenous bone or a mixture of hydroxyapatite and autogenous bone. Ten selected patients, requiring a bilateral maxillary sinus augmentation, were divided, in a split mouth, design as follows: control group (CG n = 10 sinus grafted with autogenous bone) and test group (TG, n = 10 sinus grafted with a mixture of hydroxyapatite and autogenous bone at 80 : 20 w/w). Follow a healing period of 15 and 180 days, computed tomography (CT) measurements were taken by two blinded and calibrated examiners to verify the volumetric dimensional changes of the both groups. The interobserver agreement obtained ranged from good to excellent for both groups. Both groups presented significant dimensional changes after 180 days period healing (P < 0.05). The volumetric reduction in test group was lower (25.87%) when compared with the CG (42.30%) (P < 0.05). The both graft materials improved the bone volumetric ability to anchorage a dental implant. Moreover, the mixture of HA and autogenous bone graft showed lower degree of resorption and higher dimensional stability when compared with autogenous bone graft alone, at least at 180 days of healing. The CT exam protocol should be used as an important tool to measure bone grafts volumetric alterations.Clinical Oral Implants Research 09/2013; 25(11). DOI:10.1111/clr.12261 · 3.89 Impact Factor
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- "Titanium oxide (TiO 2 ) was chosen as scaffold in the present investigation since this material has been proven to fulfil many of the demands for such materials. One of the major obstacles with synthetic scaffolds is their lack of mechanical strength to carry load after insertion into the adult body    , and so far this has also been the case for TiO 2 -based scaffolds . However, we have shown that it is possible to produce mechanically loadable ceramics based on TiO 2 and that these materials are suitable for use for bone engineering. "
ABSTRACT: Titanium oxide (TiO(2)) scaffolds have previously been reported to exhibit very low mechanical strength. However, we have been able to produce a scaffold that features a high interconnectivity, a porosity of 91% and a compressive strength above 1.2MPa. This study analyzed the in vivo performance of the porous TiO(2) scaffolds in a peri-implant cortical defect model in the rabbit. After 8weeks of healing, morphological microcomputed tomography analyses of the defects treated with the TiO(2) scaffolds had significantly higher bone volume, bone surface and bone surface-to-volume ratio when compared to sham, both in the cortical and bone marrow compartment. No adverse effects, i.e. tissue necrosis or inflammation as measured by lactate dehydrogenase activity and real-time reverse transcription polymerase chain reaction analysis, were observed. Moreover, the scaffold did not hinder bone growth onto the adjacent cortical titanium implant. Histology clearly demonstrated new bone formation in the cortical sections of the defects and the presence of newly formed bone in close proximity to the scaffold surface and the surface of the adjacent Ti implant. Bone-to-material contact between the newly formed bone and the scaffold was observed in the histological sections. Islets of new bone were also present in the marrow compartment albeit in small amounts. In conclusion, the present investigation demonstrates that TiO(2) scaffolds osseointegrate well and are a suitable scaffold for peri-implant bone healing and growth.Acta biomaterialia 09/2012; 9(2). DOI:10.1016/j.actbio.2012.09.009 · 6.03 Impact Factor