Sinus Augmentation Research Articles

Prevalence and characterization of maxillary sinus septa in a brazilian population

BackgroundThe aim of this study was to assess the anatomic aspects of the maxillary sinus septa, by means of computed tomography images, in a Brazilian population. The results might be of clinical significance in sinus lift surgery planning. Material and MethodsIn the study, 123 computed tomographs obtained from a private radiology clinic were used. They were analyzed by a single, trained and calibrated observer in order to evaluate the presence, quantity, localizations, dimensions, orientations and different characteristics in dentate, partially edentulous and completely edentulous individuals of the sinus septa. ResultsOf the individuals analyzed, 26% had a septum in the maxillary sinus, with 59.6% being classified as complete, 44.2% showed prevalence for the middle region of the maxillary sinus. There was no statistically significant difference between the right and left sides (p>0.05). ConclusionsThe majority of patients in the sample analyzed presented to septa in the maxillary sinuses, and when septa were present, a higher number of occurrence was noted in the middle region of the maxillary sinus. (This region is normally the choice of sinus lift surgery). There was no predilection relative to age, sex and type of dentition. Key words:Multislice computed tomography, maxillary antrum, anatomic variation.

Evaluation of the posterior superior alveolar artery canal by cone-beam computed tomography in a sample of the Egyptian population.

PurposeThis study was conducted to evaluate the accuracy of cone-beam computed tomography (CBCT) in detecting the posterior superior alveolar (PSA) artery canal in a sample of the Egyptian population.Materials and MethodsCBCT images of 600 maxillary sinuses of patients were examined for the presence or absence of the PSA artery along the lateral wall of the maxillary sinus, and for the diameter and type of the canal in relation to age and sex. The distances from the canal to the alveolar crest and sinus floor were also measured. Each canal was assessed to determine whether it was bifid.ResultsThe PSA artery canal could be detected in 92.0% of the sinuses. The mean distance from the inferior border of the PSA artery canal to the sinus floor was 8.2±2.2 mm (range, 3.2–13.6 mm) in males and 7.3±2.1 mm (range, 3.0–13.1 mm) in females. The mean distance from the inferior border of the PSA artery canal to the alveolar crest was 18.2±2.7 mm (range, 11.0–23.9 mm) in males and 17.4±2.3 mm (range, 10.8–23.5 mm) in females. The mean diameter of the PSA artery canal was larger in male subjects. The PSA artery canal was bifid in 8.7% of cases. The most frequently observed location of the PSA artery canal was intraosseous (82.2%).ConclusionCBCT was confirmed to be a valuable tool for evaluation and localization of the PSA artery before maxillary sinus lift surgery to avoid intraoperative bleeding.

Implicações clínicas do uso do L-PRF em cirurgias orais

The autologous blood concentrate L-PRF is responsible for the healing response in surgical procedures. However, studies results are inconclusive. Therefore, the aim of this article was to collect existing literature’s evidence concerning the clinical implications of L-PRF use in oral surgeries such as maxillary sinus lift, alveolus filling after dental extractions, and dental implants. Pubmed database was assessed and randomized clinical trials between 2006 and 2019 considering the clinical implications of L-PRF use in oral surgeries were included. A hundred and seventy articles were identified and fifteen were selected by eligibility. Although some studies had diverged, the great majority evidenced improved healing process, osseointegration and reduced post-operation pain because of L-PRF use, what was attributed to the morphological and biological characteristics of the fibrin membrane that has a three-dimensional matrix due to lack of anticoagulant during its formation, and stores growth factors, leukocytes, cytokines, and bone cells. In addition, this fibrin matrix attracts undifferentiated stem cells that will become osteoblasts. In conclusion, the greater cicatricial response, less postoperative discomfort for the patient, increased bone formation and implant-bone contact (BIC), and reduced osseointegration period are benefits associated with the L-PRF membrane use, that make L-PRF to be considered a good choice in the field of tissue regeneration.

Histological and Histomorphometric Analyses after Sinus Floor Augmentation with Different Grafting Materials

Homogeneous grafts from a bone bank, heterogeneous grafts and allow plastic grafts have already been studied and used for maxillary sinus elevation in order to reconstruct the bone for placement of dental implants. The present work aims to histologically assess bone neoformation from autogenous and heterogeneous (or xenogenous) bone grafts, in maxillary sinus lift surgery, an invasive technique. Six patients (total of 10 elevated maxillary sinuses) participated in the study with an alveolar bone remnant in the posterior region of the maxilla, less than 5mm, classification by Misch SA-4, evidenced through panoramic radiography. After a waiting period of tissue repair of 8 months, samples were collected and microscopic analysis was performed in 3 groups: autogenous group, Bio-Oss® group and Endobon® group. It was observed that the autogenous group has a statistically higher amount of bone matrix when compared to the other 2 groups. These did not differ from each other. The three types of grafts used promoted the expected new bone formation. Thus, one can choose any of the grafts evaluated to enable the installation of Osseointegrated implants and prosthetic rehabilitation in patients with the atrophic posterior maxilla.

Histologic and histomorphometric analysis of two biomaterials of xenogenous origin for maxillary sinus elevation: a clinical study.

Objective: This study analyzed two xenogenous biomaterials based on deproteinized bovine bone mineral applied for maxillary sinus elevation. Method and materials: Fourteen patients were submitted to maxillary sinus augmentation with one of the following biomaterials: Criteria Lumina Bone Porous (test group) or Geistlich Bio-Oss (control group), both of large granules (1 to 2 mm). After 6 months, trephine biopsies were collected at the time of implant placement: 27 samples (11 patients) in the test group; 7 samples (3 patients) in the control group. Biopsies were analyzed by descriptive histology and histomorphometry, in which the percentages of newly formed bone, residual biomaterial particles, and connective tissue were evaluated. Results: Histomorphometry showed means for test and control groups, respectively, of 32.41% ± 9.42% and 26.59% ± 4.88% for newly formed bone, 22.89% ± 4.58% and 25.00% ± 4.81% for residual biomaterial, and 44.70% ± 9.54% and 48.41% ± 3.36% for connective tissue. There were no differences between groups (P > .05). Conclusion: This study concluded that Criteria Lumina Bone Porous presented similar histologic and histomorphometric characteristics to Geistlich Bio-Oss 6 months after sinus elevation surgery, identifying the tested biomaterial as an interesting alternative for bone augmentation in the maxillary sinus.

Anatomical characteristics of maxillary sinus antroliths and their influence on sinus membrane thickness: a retrospective cone beam computed tomography analysis

The purpose of this study was to assess the anatomy of antroliths and its influence on the thickness of the maxillary sinus membrane. Cone beam computed tomography (CBCT) was performed on 239 patients (478 sinuses). The prevalence of antroliths per sinus was 8.4%. Regarding their distribution, antroliths were predominantly unilateral (82.5%), single (67.5%), and in a dentate area (60.0%). The antroliths were mainly located in the molar region (95.0%) and in the sinus floor (77.5%). The measured dimensions of the antroliths were as follows: length 5.6±4.4mm, width 4.1±2.9mm, height 3.5±2.1mm. The relationships between the antroliths and the sinus membrane (type 1, 34.1%; type 2, 52.3%; type 3, 13.6%) indicated that sinus membranes tended to encircle antroliths, which resulted in a gradual increase in membrane thickness. The sinus membrane was found to be significantly thicker in the presence of antrolith(s) (P<0.001). Antroliths which are sufficiently large or are located adjacent to the sinus floor or lateral wall increase the risk of sinus membrane perforation during sinus augmentation procedures. Therefore, a thorough CBCT evaluation is needed to minimize the risk of complications prior to sinus augmentation procedures.

THE ROLE OF TITANIUM MESH IN LIMITING DIMENSIONAL CHANGES OF MAXILLARY SINUS GRAFT: RANDOMIZED CLINICAL TRIAL

Objectives: The dimensional changes that occurs during the healing of the grafting material in external sinus lift procedure is always present and sometimes may lead to difficulties in placing the dental implants in the second stage. This study aims to evaluate the efficacy of adding a titanium mesh as a new fixed floor of the sinus to minimize these changes. Material and Methods: this randomized clinical trial included 8 patients who needed bilateral 2-stage sinus lift. On one side sinus lift was carried out using Deproteinized Bovine Bone Matrix (DBBM) (Group A) while on the other side a titanium mesh was fixed as a new sinus floor above the DBBM biomaterial (Group B). CBCT radiographs were taken preoperatively(T0), directly postoperatively(T1), and 9 months after surgery(T2). Linear measurements were recorded in the same points in all three radiographs, graft volume was measured and compared using 3D Slicer software. Results: the mean bone height (BH) at T1 was 13.08 and 13.56 mm while at T2 was 11.56 and 13.56 mm in groups A and B respectively. The mean reduction in BH was 1.68 and 0.00 mm in groups A and B respectively. The graft volume (GV) at T1 was 1.49 and 1.63 cc and at T2 was 1.19 and 1.53 cc, the mean volume shrinkage was 0.29 and 0.1 cc in groups A and B respectively. The differences between the groups in both linear and volumetric changes were statistically significant. Conclusions: within the limitation of this study it may be concluded that adding a titanium mesh as a new floor of the sinus helps limiting the shrinkage of both the linear dimensions and overall graft volume.

Implants with a Laser-microgrooved Collar Placed in Grafted Posterior Maxillary Extraction Sockets and in Crestally Grafted Sinuses: a 5-Year Multicentre Retrospective Study.

ABSTRACTObjectivesThe aim of this retrospective multicentre cohort study was to compare clinical outcomes, soft tissues conditions and differences in marginal bone loss between implants with a laser-microgrooved collar placed in posterior maxillary extraction sockets grafted by 4 to 5 months, and in posterior maxillary pristine bone (spontaneously healed posterior maxillary extraction sockets) by means of osteotome-mediated sinus floor elevation, over a period of 5 years after functional loading.Material and MethodsPatients of Group 1 underwent extractions with sockets preservation using porcine-derived bone, covered with collagen membrane. Group 2 underwent extractions without socket preservation. Patients of Group 1 received implants in grafted sites, and Group 2 received implants in spontaneously healed bone using a maxillary sinus lift with crestal approach.ResultsOver the observation period, the overall clinical success rate in Group 1 and Group 2 was 98% and 100%, respectively, with no differences between the procedures and implants used. Cumulative radiographic marginal bone loss ranged from 0.03 to 0.39 mm after 60 months of functional loading. There were no statistically significant differences in marginal bone loss between short and standard-length implants placed in grafted extraction sockets and in pristine bone.ConclusionsShort and standard implants with a laser-microgrooved collar, placed in posterior maxillary extraction sockets grafted by 4 to 5 months, and in posterior maxillary pristine bone (spontaneously healed posterior maxillary extraction sockets) by means of osteotome-mediated sinus floor elevation, exhibited no statistical difference in success rate, clinical parameters and marginal bone loss.

Levantamento de seio maxilar bilateral por duas técnicas diferentes com concomitante instalação de implantes: relato de caso

Esse artigo buscou demonstrar, através de um relato de caso clínico, a abordagem de levantamento de seio maxilar bilateral por duas diferentes técnicas, uma traumática via janela lateral e uma atraumática através da crista óssea, associadas à instalação de implantes osseointegrados. Paciente com 75 anos, gênero feminino procurou atendimento na clínica do Curso de Extensão em Implantodontia em uma universidade do Rio de Janeiro com quadro álgico em região de molares superiores. Após anamnese, exame clínico e análise da tomografia computadorizada, evidenciou-se extensa lesão de furca nos elementos 16 e 26, sendo indicada exodontia e reabilitação com implantes oseeointegrados. Ainda, devido à pouca altura óssea subantral, o levantamento de seio maxilar bilateral foi incluído ao plano de tratamento. No lado direito, foi realizada a técnica de Summers e no lado esquerdo a técnica da janela lateral associada ao uso de biomaterial sintético particulado e membrana de colágeno reabsorvível. A radiografia panorâmica de controle pós-cirúrgico demostrou o êxito das duas técnicas com adequada relação anatômica do enxerto e de ambosmplantes ao leito receptor. Assim, a cirurgia de elevação do seio maxilar com a concomitante instalação de implantes se mostrou um procedimento seguro, de boa previsibilidade e baixa taxa de complicações.

Immediate implant placement after maxillary sinus lift using the side window technique: clinical case report

Objetivos: O objetivo deste caso clínico foi relatar uma reabilitação unitária da região posterior da maxila, e descrever a cirurgia de levantamento de seio maxilar através da técnica de janela lateral, com colocação imediata de implante. Métodos: A cirurgia de levantamento de seio foi realizada através da técnica de janela lateral, seguida da instalação imediata do implante e posterior confecção de prótese unitária aparafusada. Resultados: Foi observada a reabilitação do elemento dental perdido através do reestabelecimento do espaço ósseo por meio da cirurgia de levantamento de seio, permitindo assim a instalação do implante imediato e confecção da prótese final. Conclusões: Seguindo um planejamento sólido e meticuloso, mesmo em cristas com menos de 5 mm de espessura, a técnica de janela lateral pode ser usada de forma previsível com um resultado clínico e radiológico adequado, dando aos pacientes excelente estabilidade do material enxertado e excelentes resultados clínicos.

Comparison of Bone Formation After Sinus Membrane Lifting Without Graft or Using Bone Substitute “Histologic and Radiographic Evaluation”

Sinus floor elevation without using autogenous bone graft or bone substitute will eliminate donor site morbidity and reduce the cost and the risk of infection. We evaluated the bone gain after sinus membrane elevation without graft or using bone substitute in the same maxilla. Dental implants were inserted simultaneously as a 1-stage procedure. In a split-mouth design, we conducted a randomized double-blinded clinical trial performing sinus lifts and simultaneous implant insertion in 10 healthy patients (n=20). On the 1 site, we performed graft-less sinus lift (group 1) and on the other site Cerabone was used as bone substitute (group 2), respectively. The quantity and quality of bone gained in each sinus were evaluated and compared radiologically and histomorphometrically. After 6months, the average gain of bone height was 6.21 and 9.58mm in group 1 and 2, respectively, as measured radiologically (P<.001, P<.001). Histomorphometric examination showed significantly higher thickness of trabeculae and bone formation in group 1 (P=.003 and P=.002). However, the neovascularization was higher, but not significantly (P=.288). Radiological bone gain was similar in both groups. However, histomorphometric examination showed superior bone formation in graft-less group as compared to the Cerabone group. The blood clot seems to be an adequate filler and excellent medium for bone formation. More studies in split-mouth design are needed to compare different bone substitutes.

Long-term crestal bone changes in implants placed in augmented sinuses with minimal or moderate remaining alveolar bone: A 10-year retrospective case-series study.

To evaluate long-term clinical and radiographic outcomes of dental implants placed after lateral window sinus augmentation utilizing the sagittal sandwich technique. Patients treated with sinus augmentation were included in this retrospective case-series study. The surgical procedure was performed with particulate autogenous bone- and anorganic bovine bone-derived mineral (3:7 ratio). Implants were grouped based on baseline residual alveolar ridge height: group S (residual alveolar ridge height of 0.1-3.5mm), group M (height of 3.5-7mm), and group C (native bone). Radiographs were taken at baseline (abutment installation) and annually throughout the 10-year follow-up. A total of 86 patients (92 sinus lifts) and 209 implants were included. Ten sinus membrane perforations were recorded (11% incidence), and graft infections occurred in 3 cases (3.2% incidence). During the 10-year follow-up, 3 implants (1.4%) failed. No significant differences in the mean implant marginal bone loss (MBL) between the three groups were found after 1-, 2-, and 5-year follow-up (p>.05). At 10years, group C exhibited more MBL than group M with a mean difference of -0.53mm (p=.01). After 10years, MK III implants displayed significantly more bone loss in native bone than those in augmented bone with a mean difference of 0.48mm (p=.02). Five patients and 7 implants developed peri-implantitis with no significant differences between the groups (p=.570). Implant placement after two-stage sinus grafting utilizing the sagittal sandwich technique is a relatively safe and predictable procedure with minimal complications and MBL after 10-year follow-up.

A Minimally Invasive Technique for Short Spiral Implant Insertion with Contextual Crestal Sinus Lifting in the Atrophic Maxilla: A Preliminary Report.

The most recently reported techniques for the rehabilitation of the atrophic posterior maxilla are increasingly less invasive, as they are generally oriented to avoid sinus floor elevation with lateral access. The authors describe a mini-invasive surgical technique for short spiral implant insertion for the prosthetic rehabilitation of the atrophic posterior maxilla, which could be considered a combination of several previously described techniques based on the under-preparation of the implant site to improve fixture primary stability and crestal approach to the sinus floor elevation without heterologous bone graft. Eighty short spiral implants were inserted in the molar area of the maxilla in patients with 4.5–6 mm of alveolar bone, measured on pre-operative computed tomography. The surgical technique involved careful drilling for the preparation of implant sites at differentiated depths, allowing bone dislocation in the apical direction, traumatic crestal sinus membrane elevation, and insertion of an implant (with spiral morphology) longer than pre-operative measurements. Prostheses were all single crowns. In all cases, a spiral implant 2–4 mm longer than the residual bone was placed. Only two implants were lost due to peri-implantitis but subsequently replaced and followed-up. Bone loss values around the implants after three months (at the re-opening) ranged from 0 to 0.6 mm, (median value: 0.1 mm), while after two years, the same values ranged from 0.4 to 1.3 mm (median value: 0.7 mm). Clinical post-operative complications did not occur. After ten years, no implant has been lost. Overall, the described protocol seems to show good results in terms of predictability and patient compliance.

Safety and Efficacy Results of BonoFill First-in-Human, Phase I/IIa Clinical Trial for the Maxillofacial Indication of Sinus Augmentation and Mandibular Bone Void Filling

The gold standard for bone regeneration of bone deficiencies is still an autologous bone graft, which has considerable disadvantages; namely, the need for a second major surgery and the limited volume of bone available for harvesting. BonoFill (BF) is a novel, tissue-engineered, bone graft with intrinsic osteoinductive, osteoconductive, and osteogenic properties, consisting of the patient's own adipose tissue-derived mesenchymal stem cells, attached to hydroxyapatite particles. Here, we present the safety and efficacy results of BF first-in-human clinical study for maxillofacial bone tissue regeneration. Eleven eligible male and female subjects, aged 49-65years, were enrolled into the clinical study in 2 clinical indications: Bone augmentation and bone void grafting in the jaws. Clinical follow-up was performed throughout a period of 6 months after BF treatment and included clinical examination, blood tests, CT scans, and biopsies collected from the transplantation site to assess chronic bone infection, changes in complete blood count, and adequate bone augmentation for implant placement. The study results demonstrated that BF promoted adequate bone tissue regeneration without complications. Per our evaluation, there were no incidents of chronic bone infection, or significant changes in complete blood count, and the patients reported overall good health for the duration of the study. At trial end, in the sinus augmentation indication, the BF treated sites residual bone was augmented at an average of 6.36mm (Δ new bone, n=10) and the total bone height at the treated area was on average 11.44mm (n=10). In the indication of filling of bone voids, the patient's average residual bone height of 2.91mm was 15.76mm (n=1) at trial end. BF treatment was shown to be safe and resulted in newly generated bone, which provided adequate bone height for placement of dental implants. Thus, BF is a promising novel autologous bone graft for bone tissue repair.

Severely atrophied jaws: A case report of full mouth rehabilitation using basal and cortical implants

Patients with highly atrophied jaws pose a serious clinical problem for construction of removal denture or surgical placement of implant. They sometime are in need of undergoing delicate surgical interventions for gaining vertical bone height with/without sinus lift. It requires expensive bone graft substitutes and barrier membranes in the hand of an expert. A long period of time for bone healing is an additional enigma. After the jaws are made ready, the implants are surgically inserted into the bone and a period of another 4-6 months waiting is inevitable. The long waiting period and the expenses for adjuvant surgical treatments are not appreciated by the patients. The present article deals with a patient with highly atrophied jaws for full mouth rehabilitation with basal and cortical implants. Keywords: Jaw atrophy, Bone augmentation, Cortical implants, Full mouth rehabilitation, Strategic implantology.

Maxillary Sinus Augmentation in the Presence of Retention Cyst: A New Clinical Approach

Maxillary Sinus Augmentation in the Presence of Retention Cyst: A New Clinical Approach

Factors influencing the prevalence of peri-implantitis in implants inserted in augmented maxillary sinuses: A multicenter cross-sectional study.

Peri-implantitis is widely recognized as a major cause of late implant failure, both in pristine and regenerated bone. The present study aims to evaluate the prevalence of peri-implantitis in implants inserted in augmented maxillary sinuses and to analyze possible risk factors. A cross-sectional study was conducted in four centers including patients who underwent lateral or transcrestal sinus augmentation and received dental implants. Clinical and anamnestic data were collected using a standardized form. Univariate and multivariate logistic regression analyses have been performed for both implant-level and patient-level variables. Subsequently, a multilevel logistic mixed-effect model was built to analyze variables correlated with the occurrence of peri-implantitis. A total of 156 patients (61 males and 95 females; mean age: 60.9 ± 11.6 years) with 315 implants inserted into augmented maxillary sinuses with a follow-up ranging from 1 to 18 years were evaluated. Seven implants in seven patients were previously lost for peri-implantitis (2.2% and 4.5% at implant- and patient-level, respectively); 250 implants showed no signs of peri-implant diseases (79.4%), 34 implants presented mucositis (10.8%), and 24 implants exhibited peri-implantitis (7.6%). Corresponding data evaluated at patient-level were 125 (80.1%), 17 (10.9%), and 14 (9.0%), respectively. At the multilevel analysis, history of periodontitis, sinus elevation with lateral approach, and one-stage sinus floor elevation significantly correlated with the occurrence of peri-implantitis (P<0.001). History of periodontitis confirmed its well-known role as a risk factor for peri-implant pathologies. In addition, both lateral window technique and one-stage sinus floor elevation seemed to represent significant risk factors for peri-implantitis.

Maxillary sinus augmentation with three different biomaterials: Histological, histomorphometric, clinical, and patient-reported outcomes from a randomized controlled trial.

Lateral maxillary sinus augmentation (MSA) is a predictable bone regeneration technique in case of atrophy of the posterior-upper maxilla. Aimed at obtaining quantity and quality of bone suitable for receiving osseointegrated implants, its success is largely due to the skill of the surgeon, but also to the characteristics of the biomaterial used. Twenty-four patients needing MSA were included in the study. The patients were randomly allocated to three different groups: anorganic bovine bone mineral as control, tricalcium phosphate with or without hyaluronic acid (HA) as test groups. Nine months after MSA, bone biopsies were harvested for the histomorphometric analysis. Secondary outcomes were mean bone gain, intraoperative and postoperative complications, implant insertion torque, implant failure, and patient-reported outcome measures. Although the percentage of new bone was not statistically different between the three groups (P = .191), the percentages of residual biomaterial was significantly higher (P < .000) and nonmineralized tissue significantly lower (P < .000) in the control than in the test groups. Test groups did not differ significantly from each other for all histomorphometric parameters. The implant insertion torque was significantly higher in the control group (P < .0005). The rest of the secondary outcomes were not significantly different between the groups. MSA is a safe and predictable procedure in terms of histological, clinical, and PROAMs, regardless of the biomaterial used. The addition of HA did not influence the outcomes.

Histological and Histomorphometric Evaluation of New Bone Formation after Maxillary Sinus Augmentation with Two Different Osteoconductive Materials: A Randomized, Parallel, Double-Blind Clinical Trial.

This study aimed to investigate the histological features of deproteinized equine bone mineral (DEBM) and anorganic bovine bone (ABB) after human sinus augmentation with the lateral approach. Twenty-three sinus augmentations were performed in 16 patients (male: 10/female: 6) using DEBM or ABB in a randomized fashion. Healing took place over the next 6 months. Bone core biopsies (N = 23) were obtained for each subject prior to placing the dental implants. The biopsies were processed for both histological descriptions and histomorphometric analysis. Statistical analyses were applied as appropriate, defining statistical significance as p < 0.05. Core bone biopsies revealed no differences in terms of newly formed bone between groups, or differences in terms of tissue inflammation. Both DEBM and ABB appear to be suitable biomaterials for bone augmentation in sinus lift surgery in the short term. However, dedicated studies are required to confirm these results and their stability in the long term.

Effect of anatomical parameters of maxillary sinus on the outcomes of transcrestal sinus lift

To investigate the effect of three anatomical parameters (maxillary sinus width, maxillary sinus angle, and residual bone height) on the outcomes of transcrestal sinus lift with simultaneous implant placement. A total of 60 maxillary sinuses in 42 patients were included in this study. All patients were treated with transcrestal sinus lift procedure associated with simultaneous implant placement using a composite graft material of autogenous bone and Bio-Oss. For each patient, beam computed tomography (CBCT) scans were performed preoperatively, immediately after surgery, and 6 months after surgery. The parameters were measured on the preoperative and postoperative CBCT images. The correlation of three anatomical parameters with graft resorption was analyzed using Pearson's correlation test. The average residual bone height was (4.46±1.55) mm. The average width of maxillary sinus was (13.86±2.71) mm. The average sinus angle was 78.09°±10.27°. A significant positive correlation was observed between maxillary sinus width and graft resorption (P<0.01). A positive association was also found between sinus angle and graft resorption (P<0.01). The findings show that graft bone resorption in elevated sinus has a positive correlation with the sinus width and sinus angle.