Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis

Yan, Xu; Zhang, Xinwen; Chi, Weichao; Ai, Hongjun; Wu, Lin

doi:10.3892/etm.2015.2205

Cited by 9 publications

(14 citation statements)

References 25 publications

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“…Finally, the cortical bone surrounding the maxillary sinus and mandibular canal can be extremely thin, up to 1 mm (Yan et al 2015), or of an intermediate density between cancellous and cortical. These anatomic variations may not provide as much tissue contrast as provided in the bulk tissues measured here.…”

Section: Discussionmentioning

confidence: 99%

Gauging electrical properties of bone with a bioimpedance-sensing drill

Butler

Halter

2019

Physiol. Meas.

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Objective: Multiple surgical procedures require drilling through bone to access underlying anatomy or for device placement. In dental applications, iatrogenic injury caused by accidental perforation of cortical bone into critical anatomy occurs in a significant number of dental implant procedures. Limited real-time sensing methods are available to guide clinicians while drilling through cancellous bone towards cortical interfaces. Early interface detection could prevent accidental damage to underlying anatomic structures. This study aims to demonstrate that electrical impedance spectroscopy can be integrated within a standard surgical drill to distinguish between bone types. Approach: A custom bearing and insulated drill bit were designed to collect 10 cortical and cancellous impedance measurements from ex vivo femurs (2 pigs) and 80 bone measurements from in situ femurs (4 pigs). In the in situ study, two return electrodes (simulating a lip-clip and shoulder pad) were used to assess impedance differences associated with return electrode geometry. Main results: Significant ex vivo differences (p < 0.05) between cortical and cancellous bone occurred in the real resistivity from 0.1 to 100 kHz and in the imaginary resistivity from 0.3 to 10 kHz, with a maximum cortical-to-cancellous impedance ratio of 1.48. Significant in situ differences (p < 0.01) were observed in both real and imaginary resistivities from 0.1 to 100 kHz, with a maximum impedance ratio of 2.94. AUCs for classifying bone type based on the real resistivity ranged from 0.84 to 0.96 for ex vivo bone and 0.98 to 1.0 for in situ bone. Mean differences between return electrode geometries were less than 5%. Significance: The significant cortical-to-cancellous contrast observed indicates this system's potential to provide real-time tissue differentiation during bone drilling procedures.

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Section: Discussionmentioning

confidence: 99%

Gauging electrical properties of bone with a bioimpedance-sensing drill

Butler

Halter

2019

Physiol. Meas.

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“…In clinical situations, however, these phenomena are not likely to occur as the bone loss occurs continuously. In preliminary modelling, the maxillary bone was reconstructed from the data of other researchers [ 15 ][ 16 ] according to the anatomical area of the sinus.…”

Section: Discussionmentioning

confidence: 99%

“…For immediate loading, when the implant apex broke into or through the sinus cortical bone, the maximum displacements of the implant, particularly at the implant apex, were smaller than those did not reach sinus floor. Yan et al [ 16 ] FE study on the association between implant apex and sinus floor showed that having the implant apex in contact with, piercing or breaking through the sinus floor cortical bone benefited the implant stability, particularly for immediate loading.…”

Section: Discussionmentioning

confidence: 99%

Angulated Dental Implants in Posterior Maxilla FEA and Experimental Verification

Hamed¹,

Marzook²,

Ghoneem³

et al. 2018

Open Access Maced J Med Sci

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AIM: This study aimed to evaluate the effect of different implant angulations in posterior maxilla on stress distribution by finite element analysis and verify its results experimentally. METHODS:Two simplified models were prepared for an implant placed vertically and tilted 25° piercing the maxillary sinus. Geometric models' components were prepared by Autodesk Inventor then assembled in ANSYS for finite element analysis. The results of finite element analysis were verified against experimental trials results which were statistically analysed using student t-test (level of significance p < 0.05). RESULTS:Implant -abutment complex absorbed the load energy in case of vertical implant better than the case of angulated one. That was reflected on cortical bone stress, while both cases showed stress levels within the physiological limits. Comparing results between FEA and experiment trials showed full agreement. CONCLUSION:It was found that the tilted implant by 25° can be utilised in the posterior region maxilla for replacing maxillary first molar avoiding sinus penetration. The implant-bone interface and peri-implant bones received the highest Von Mises stress. Implant -bone interface with angulated implant received about 66% more stresses than the straight one.

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“…Bone quality is proven to be one of the critical determinants for implant treatment planning [ 15 ]. Nevertheless, due to poor bone quality, the implant success rates in the posterior maxillary regions were lower than in other regions [ 32 , 33 ]. In this case, an attempt was undertaken to investigate the impact of bone quality on the stress magnitude of supporting bone and emphasis on D3 and D4 bone.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2020

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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.

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Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis

Cited by 9 publications

References 25 publications

Gauging electrical properties of bone with a bioimpedance-sensing drill

Gauging electrical properties of bone with a bioimpedance-sensing drill

Angulated Dental Implants in Posterior Maxilla FEA and Experimental Verification

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

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