scholarly journals Biomechanical Analysis of Grafted and Nongrafted Maxillary Sinus Augmentation in the Atrophic Posterior Maxilla with Three-Dimensional Finite Element Method

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Xuan Wang ◽  
Tianqi Zhang ◽  
Enli Yang ◽  
Zhiyuan Gong ◽  
Hongzhou Shen ◽  
...  
Keyword(s):  
Maxillary Sinus ◽  
Bone Quality ◽  
Three Dimensional ◽  
Biomechanical Analysis ◽  
Sinus Augmentation ◽  
Maxillary Sinus Augmentation ◽  
Posterior Maxilla ◽  
Atrophic Maxilla ◽  
Von Mises ◽  
Three Dimensional Finite Element

This study is aimed at determining the optimal sinus augmentation approach considering the poor bone condition in the zone of atrophic posterior maxilla. A series of simplified maxillary segment models varying in residual bone height (RBH) and bone quality were established. A 10 mm standard implant combined with two types of maxillary sinus augmentation methods was applied with the RBH, which was less than 10 mm in the maxilla. The maximal equivalent von Mises (EQV) stress in residual bone was evaluated. Bone quality had an enormous impact on the stress magnitude of supporting bone. Applying sinus augmentation combined with grafts was suitable for stress distribution, and high-stiffness graft performed better than low-stiffness one. For 7 mm and 5 mm atrophic maxilla, nongrafted maxillary sinus augmentation was feasible in D3 bone. Poor bone quality was a negative factor for the implant in the region of atrophic posterior maxilla, which could be improved by grafts. Meanwhile, the choice of maxillary sinus augmentation approaches should be determined by the RBH and quality.

Stress Analysis of Prostheses Retained with Zygomatic Implants on Augmented and Non-Augmented Maxillary Sinus

2020 ◽  
Vol 10 (3) ◽  
pp. 336-340
Author(s):  
Hamiyet Güngör ◽  
Süleyman Kaman ◽  
Ozkan Ozgul ◽  
M. Ercüment Önder ◽  
Fethi Atil ◽  
...  
Keyword(s):  
Maxillary Sinus ◽  
Treatment Options ◽  
Three Dimensional ◽  
Von Mises Stress ◽  
Posterior Maxilla ◽  
Atrophic Maxilla ◽  
Zygomatic Implants ◽  
Von Mises ◽  
Three Dimensional Finite Element ◽  
Zygomatic Implant

Zygomatic implants for toothless, atrophic posterior maxilla are effective treatment options and it is known that graft use has a positive effect on the zygomatic implant stability with this treatment option. The aim of this study was to evaluate the stress values and their distribution at zygomatic implant-supported prosthetic infrastructure in augmented and non-augmented models. In this study, the three-dimensional finite element method was used and 2 zygomatic implants (47.5 × 4.0 mm), 2 conventional implants (13 × 3.75 mm) and atrophic maxilla with augmented and non-augmented maxillary sinus with prosthetic infrastructure, were modelled. A vertical load of 150 N was applied onto the maxillary model at 4 different regions (#9, #12, #14 and #15). The von Mises stress, which is produced as a result of loading of zygomatic implants and prosthetic infrastructure has been evaluated in augmented and non-augmented models. The highest von Mises stress value for the prosthetic infrastructure was determined in the non-augmented model as a result of the loading to region #9 (MPa 222,886). Consequently, grafting procedures will increase bone support and reduce stresses in the prosthetic substructure, especially in posterior loads in the maxilla with low bone density.

scholarly journals Biphasic Calcium Phosphate Biomaterials: Stem Cell-Derived Osteoinduction or In Vivo Osteoconduction? Novel Insights in Maxillary Sinus Augmentation by Advanced Imaging

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2159
Author(s):  
Giovanna Iezzi ◽  
Antonio Scarano ◽  
Luca Valbonetti ◽  
Serena Mazzoni ◽  
Michele Furlani ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Maxillary Sinus ◽  
Biphasic Calcium Phosphate ◽  
Calcium Phosphates ◽  
Three Dimensional ◽  
Sinus Augmentation ◽  
Native Bone ◽  
Maxillary Sinus Augmentation ◽  
Posterior Maxilla

Maxillary sinus augmentation is often necessary prior to implantology procedure, in particular in cases of atrophic posterior maxilla. In this context, bone substitute biomaterials made of biphasic calcium phosphates, produced by three-dimensional additive manufacturing were shown to be highly biocompatible with an efficient osteoconductivity, especially when combined with cell-based tissue engineering. Thus, in the present research, osteoinduction and osteoconduction properties of biphasic calcium-phosphate constructs made by direct rapid prototyping and engineered with ovine-derived amniotic epithelial cells or amniotic fluid cells were evaluated. More in details, this preclinical study was performed using adult sheep targeted to receive scaffold alone (CTR), oAFSMC, or oAEC engineered constructs. The grafted sinuses were explanted at 90 days and a cross-linked experimental approach based on Synchrotron Radiation microCT and histology analysis was performed on the complete set of samples. The study, performed taking into account the distance from native surrounding bone, demonstrated that no significant differences occurred in bone regeneration between oAEC-, oAFMSC-cultured, and Ctr samples and that there was a predominant action of the osteoconduction versus the stem cells osteo-induction. Indeed, it was proven that the newly formed bone amount and distribution decreased from the side of contact scaffold/native bone toward the bulk of the scaffold itself, with almost constant values of morphometric descriptors in volumes more than 1 mm from the border.

scholarly journals The role of CT and MRI scans in maxillary sinus augmentation surgery

2021 ◽  
Vol 6 (2) ◽  
pp. 57-58
Author(s):  
Bharani Krishna T ◽  
◽  
Mohammad Naffizuddin ◽  
M Sirisha ◽  
Ch.Ram Sunil ◽  
...  
Keyword(s):  
Diagnostic Imaging ◽  
Maxillary Sinus ◽  
Three Dimensional ◽  
Vital Role ◽  
Primary Role ◽  
Sinus Augmentation ◽  
Maxillary Sinus Augmentation ◽  
Posterior Maxilla ◽  
Mri Scans

Diagnostic imaging has a primary role in presurgical planning. Computerized tomography has become a standard for assessing the feasibility of implant surgery. Three- dimensional diagnostic assessments have a decisive value in presurgical treatment planning, especially in situations in which the alveolar process has pronounced resorption, and therefore insufficient bone volume for placing endosseous implants. These situations, which once limited the placement of implants in the posterior maxilla, can now be overcome via maxillary sinus augmentation procedures. In these cases, diagnostic imaging, in particular using CT scans, plays a vital role in providing reliable and necessary information. MR imaging reveals to be ideal imaging in diagnosing maxillary sinus augmentation.

Automatic three‐dimensional analysis of bone volume and quality change after maxillary sinus augmentation

2019 ◽  
Vol 21 (6) ◽  
pp. 1148-1155
Author(s):  
Jin‐Ju Kwon ◽  
JaeJoon Hwang ◽  
Yong‐Deok Kim ◽  
Sang‐Hun Shin ◽  
Bong‐Hae Cho ◽  
...  
Keyword(s):  
Maxillary Sinus ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Bone Volume ◽  
Quality Change ◽  
Sinus Augmentation ◽  
Maxillary Sinus Augmentation

scholarly journals Osteotome-Mediated Sinus Lift without Grafting Material: A Review of Literature and a Technique Proposal

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Silvio Taschieri ◽  
Stefano Corbella ◽  
Massimo Saita ◽  
Igor Tsesis ◽  
Massimo Del Fabbro
Keyword(s):  
Survival Rate ◽  
Maxillary Sinus ◽  
Alveolar Bone ◽  
Bone Volume ◽  
Large Sample Size ◽  
Sinus Augmentation ◽  
Lifting Technique ◽  
Maxillary Sinus Augmentation ◽  
Posterior Maxilla ◽  
Grafting Materials

Implant rehabilitation of the edentulous posterior maxilla may be a challenging procedure in the presence of insufficient bone volume for implant placement. Maxillary sinus augmentation with or without using grafting materials aims to provide adequate bone volume. The aim of the present study was to systematically review the existing literature on transalveolar maxillary sinus augmentation without grafting materials and to propose and describe an osteotome-mediated approach in postextraction sites in combination with platelet derivative. The systematic review showed that high implant survival rate (more than 96% after 5 years) can be achieved even without grafting the site, with a low rate of complications. Available alveolar bone height before surgery was not correlated to survival rate. In the described case report, three implants were placed in posterior maxilla after extraction of two teeth. An osteotome-mediated sinus lifting technique was performed with the use of platelet derivative (PRGF); a synthetic bone substitute was used to fill the gaps between implant and socket walls. No complications occurred, and implants were successfully in site after 1 year from prosthetic loading. The presented technique might represent a viable alternative for the treatment of edentulous posterior maxilla with atrophy of the alveolar bone though it needs to be validated by studies with a large sample size.

Maxillary sinus pneumatization and augmentation: A three-dimensional finite element analysis

2021 ◽  
Vol 11 (11) ◽  
pp. 1892-1900
Author(s):  
Yanbo Jiang ◽  
Ming Gong ◽  
Donghui Chen ◽  
Jiaojie Li ◽  
Hailun Zhou ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bone Graft ◽  
Maxillary Sinus ◽  
Three Dimensional ◽  
Element Analysis ◽  
3D Finite Element ◽  
Dimensional Finite Element ◽  
Von Mises ◽  
Three Dimensional Finite Element

This study aimed to explore the biomechanical behaviors of maxillary sinus elevation with bone grafts of various heights and widths using three-dimensional (3D) finite element analysis. We constructed 27 3D finite element models according to bone graft dimensions for three maxillary sinuses. These models were classified as (i) tapered, (ii) ovoid, and (iii) square. Each maxillary sinus type was analyzed with bone graft heights of 3 mm, 6 mm, and 9 mm and mesiodistal bone graft widths of 8 mm, 10 mm, and 12 mm. Different sinus pressure of 100 Pa, 500 Pa, and 1,000 Pa was applied to each aspect of the maxillary sinus. The maximum von Mises (max-VM) stress for each bone graft model was highest in the square group. The bone graft’s max-VM stress was decreased while increasing bone graft height from 3 to 9 mm in the tapered and square groups. In the ovoid group, the max-VM stress of all bone graft models decreased when the bone graft height increased from 3 to 6 mm. Thus 6 mm is the most appropriate bone graft height for all types of maxillary sinus elevation.

Sign in / Sign up

Export Citation Format

Share Document