Effect of joining the sectioned implant-supported prosthesis on the peri-implant strain generated in simulated mandibular model

Singh, Ipsha; Nair, K Chandrasekharan; Shetty, Jayakar M

doi:10.4103/jips.jips_144_17

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…This study revealed that sectioning and reuniting the long-span implant prosthesis was found to be a significant factor in influencing the peri-implant strain, irrespective of joining methods such as arc welding, laser welding, and soldering. [ 18 ] When we see the literature on the digital impression for such cases, Gherlone EF used digital impressions in “All-on-Four” implant restorations. A digital scan body can be an adjuvant to get a definitive prosthesis.…”

Section: Discussionmentioning

confidence: 99%

To evaluate and compare the accuracy of definitive casts using various splinting methods on implant level impressions in All-on-Four treatment: An in vitro study

Shankar

Doddamani

2020

J Indian Prosthodont Soc

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Aim: The aim of this study is to evaluate and compare the accuracy of master casts obtained by different splinting techniques for implant level impressions in All-on-Four implant treatment protocol using a coordinate measuring machine. Settings and Design: The study design involves an in vitro study. Materials and Methods: In this in vitro study, a reference clear acrylic resin (AR) model comprising four regular platform implant 3.6 mm × 10.0 mm (Dentium Implant India Pvt. Ltd, Bengaluru, India) which was placed following the All-on-Four implant protocol is prepared. Impressions were categorized into three different groups: Group 1 – impression copings were nonsplinted; Group 2 – impression copings were splinted using AR sectioned 17 min after setting and rewelded with the same resin; and Group 3 – impression copings were splinted by titanium bar using an intraoral welder. A total of 33 ( n = 11 in each group) impressions were made to evaluate three different splinting techniques. Impressions were poured with Type 4 dental stone. A coordinate measuring machine was used to record the x, y, and z co-ordinates and angular displacement. The measurements were compared with those obtained from the reference model. Statistical Analysis Used: One-way ANOVA test was used as a test of significance. Results: There was less linear and rotational displacement for the metal-splinted group ( P < 0.001) In the x-axis, nonsplinted group showed a statistically significant difference in straight implants (2 and 3 implants) ( P = 0.001) of All-on-Four treatment protocol. Conclusion: The splinting methods have a direct effect on the accuracy of definitive casts. The metal-splinted direct technique produced the most accurate casts followed by AR-splinted direct technique and nonsplinted direct technique.

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Section: Discussionmentioning

confidence: 99%

To evaluate and compare the accuracy of definitive casts using various splinting methods on implant level impressions in All-on-Four treatment: An in vitro study

Shankar

Doddamani

2020

J Indian Prosthodont Soc

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“…The stresses generated in the bone surrounding implant prosthesis also depend on the implant design, material, structure, and dimensions. 33 The implant diameter is reported to be more important than implant length in distributing stresses to the surrounding bone. In a study conducted by Eazhil et al, 34 it was concluded that there was a statistically significant decrease in von Mises stress as the implant diameter increased.…”

Section: Wjdmentioning

confidence: 99%

Influence of Attachment Configuration on Stresses in Completely Edentulous Mandibular Ridge with an Implant-retained Overdenture: A Finite Element Analysis

Shetty¹,

Gopalakrishna²,

Bollineni³

et al. 2018

World Journal of Dentistry

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Aim: To evaluate and compare the stress distribution in periimplant area and posterior region of completely edentulous mandible rehabilitated using implant-retained overdenture (IOD) with two types of ball attachment configuration, i.e., rigid and resilient.Materials and methods: Two mathematical models were prepared simulating completely edentulous mandibular ridge. Model 1 represented implant with rigid stud attachment. Model 2 represented implant with resilient stud attachment. Both the models were subjected to the compressive force of 35 N. The stresses in the peri-implant area and posterior region of the mandible were evaluated and compared for both the models. Results:The IOD with rigid stud configuration showed 12.1% higher peri-implant stresses than resilient configuration, whereas the resultant stress values in posterior edentulous region were 1.5% lower with resilient configuration. Conclusion:Highest stress value was seen in the crestal part of bone around the implant with both rigid and resilient attachment configuration. Implant-retained overdentures with resilient stud attachment showed better dissipation of forces when compared with rigid attachment.Clinical significance: Correct choice of attachment configuration can influence the peri-implant stresses in IOD, which in turn reduces the complications that can be a result of excessive stresses around the implant.

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Effect of Prosthetic Framework Material, Cantilever Length and Opposing Arch on Peri-Implant Strain in an All-on-Four Implant Prostheses

Shetty

Singh

Sumayli³

et al. 2021

Nigerian Journal of Clinical Practice

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Aim: To evaluate the effect of prosthetic framework material and cantilever length on peri-implant strain in mandibular all-on-four implant-supported prostheses with different types of arch antagonist forces. Materials and Methods: Models simulating a completely edentulous mandibular arch fabricated in heat-cured acrylic resin were used. On the acrylic models, four implants were placed at regions 34, 32, 42, and 44 simulating all-on-four implant placements. Implant-supported screw-retained fixed prosthesis frameworks were fabricated using three different materials (cobalt-chromium, zirconia, and polyetheretherketone) and with three different cantilever lengths (zero mm, 15 mm, and 25 mm). Strain gauges were attached on the model at the buccal and lingual positions of each implant. Forces simulating opposing natural dentition, conventional complete denture, and the parafunctional habit were applied to the models. The peri-implant strain in each strain gauge was recorded. Results: Least peri-implant strains (67 microstrains) were observed when forces simulating conventional complete dentures were applied on the models and the highest peri-implant strains (9091 microstrains) were observed when forces simulating parafunctional habit were applied. One-way ANOVA test followed by Tukey's post hoc analysis was performed to compare the mean deformation scores between different materials at 50 N load. The level of significance [P-value] was set at P < 0.05. Tests showed significant differences between zero mm and the other types in all the different materials, and also between 1.5 x AP and 2.5 x AP for Zirconia and Peek material at P = 0.02 & P = .008, respectively. The results showed that the type of framework material, cantilever length, and occlusal forces from the opposing arch influence the peri-implant strain in the bone in all-on-four implant-supported prostheses. Conclusion: Rehabilitation of a single, completely edentulous arch with implant-supported prostheses should consider the situation of the opposing arch. The choice of framework material, as well as the cantilever length, should be altered based on the forces from the opposing arch.

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Effect of joining the sectioned implant-supported prosthesis on the peri-implant strain generated in simulated mandibular model

Cited by 3 publications

References 21 publications

To evaluate and compare the accuracy of definitive casts using various splinting methods on implant level impressions in All-on-Four treatment: An in vitro study

To evaluate and compare the accuracy of definitive casts using various splinting methods on implant level impressions in All-on-Four treatment: An in vitro study

Influence of Attachment Configuration on Stresses in Completely Edentulous Mandibular Ridge with an Implant-retained Overdenture: A Finite Element Analysis

Effect of Prosthetic Framework Material, Cantilever Length and Opposing Arch on Peri-Implant Strain in an All-on-Four Implant Prostheses

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