Finite Element Analysis of effect of cusp inclination and occlusal contacts in PFM and PEEK implant-supported crowns on resultant stresses

Manchikalapudi, Githanjali; Basapogu, Sreeramulu

doi:10.1016/j.mjafi.2020.11.014

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…The equal satisfaction between the two treatment options may be due to using the same number of implants and superstructure materials. It might be connected to the beneficial BioHPP-reinforced polymer: restorations with low specific weight, bone-like flexibility, shock absorption, minimal material fatigue, absence of viscoplastic fractures, excellent biocompatibility, minimal plaque buildup, and lack of corrosion or color stability [ 56 , 57 ].…”

Section: Discussionmentioning

confidence: 99%

Hybrid Prosthesis versus Overdenture: Effect of BioHPP Prosthetic Design Rehabilitating Edentulous Mandible

Al-Asad,

El Afandy,

Mohamed

et al. 2023

International Journal of Dentistry

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Aim. To compare the BioHPP (biocompatible high-performance polymer) as a substructure for the hybrid prosthesis versus the BioHPP bar supporting and retaining implant overdenture by radiographic evaluation to identify bone height alteration around the implants and to evaluate satisfaction based on visual analoge scale questionnaire. Materials and Methods. Ill-fitting mandibular dentures were chosen for 14 fully edentulous male patients with adequate dental hygiene, enough interarch space, and free of systemic diseases and parafunctional habits. Patients who received new dentures (CDs) were randomly allocated into each group using computer software, and four interforaminal implants were inserted in parallel using a surgical guide. Three months after osseointegration, the patients received either CAD–CAM BioHPP framework hybrid prosthesis (Group I) or BioHPP bar supported and retained overdenture (Group II). Using digital preapical radiography, the bone loss is evaluated 6, 12, and 18 months after insertion. The subjective patient evaluation was done using a questionnaire based on the VAS includes five points for chewing, comfort, esthetics, speech, oral hygiene, and general satisfaction. Results. The overall marginal bone loss (MBL) revealed that Group I (hybrid prosthesis) was more than Group II (bar overdenture) at all intervals in the anterior and posterior implants’ mesial and distal surfaces. The patient satisfaction survey results showed that, after 18 months, the difference was statistically not significant between them all ( P > 0.05 ) except for the comfort (for the overdenture group, 4.43 ± 0.53 while the fixed hybrid was 5.00 ± 0.00). Conclusion. BioHPP framework material is an alternative material for implant rehabilitation of edentulous mandible with minimal MBL in BioHPP bar overdenture compared to BioHPP hybrid prosthesis.

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Section: Discussionmentioning

confidence: 99%

Hybrid Prosthesis versus Overdenture: Effect of BioHPP Prosthetic Design Rehabilitating Edentulous Mandible

Al-Asad,

El Afandy,

Mohamed

et al. 2023

International Journal of Dentistry

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“…In term of load cushioning capacity of the prosthetic elements, PEEK has a comparable modulus of elasticity (4GPa) to that of bone (4.2GPa). Thus, the bone could allow bone stimulation favoring its remodeling without overloading (17) .…”

Section: Discussionmentioning

confidence: 99%

The effect of two different bar materials constructed with CAD/CAM technology on implant retained mandibular overdentures: radiographic evaluation.

Abdelkader

Talaat

Nawar

et al. 2021

Ain Shams Dental Journal

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Background: Implant supported overdentures are a widely-accepted treatment approach with long-term effectiveness for restoring function and aesthetics, as well as improving masticatory efficiency and individual satisfaction. Recently, Computer aided design-Computer aided manufacturing (CAD/CAM) fabricated bars are increasingly used providing high stability levels, a stress-free fit, and high precision level. Objective: to evaluate the crestal bone height surrounding the implants in implant-supported mandibular overdentures retained with CAD/CAM milled Co-Cr and PEEK bar attachments using CBCT. Materials and Methods: Twenty completely edentulous patients were selected from the outpatient clinic, Prosthodontic Department, Faculty of Dentistry, Ain Shams University. They were classified into two groups: Group I: Ten patients received CAD/CAM milled Co-Cr bar supporting implant mandibular overdenture. Group II: Ten patients received CAD/CAM milled PEEK bar supporting implant mandibular overdenture. Radiographic evaluation using CBCT was carried out at insertion time, six months, and twelve months after loading to evaluate the marginal bone height changes around the implants in both groups. Results: Statistical analysis of the data revealed significant increase in the amount of bone loss around the implants for group I (Co-Cr) compared to group II (PEEK) during the one year follow-up period. Conclusion:The use of CAD/CAM milled Co-Cr and PEEK bar attachments to support implant mandibular overdenture meets the implant success criteria based on clinical and radiological findings after one year. However, CAD/CAM milled PEEK bar may be advantageous than CAD/CAM milled Co-Cr bar in terms of reduced bone loss.

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“…It was also suggested that the distribution of forces can mitigate implant overload, through multiple occlusal contacts on multiple posterior teeth, instead of a single contact in just one crown. However, multiple contacts placed away from the center of the implant can cause a cantilever effect, modifying the load incidence from purely axial to an oblique vector [40]. In summary, occlusal contacts that occur away from the implant's axis generate greater implant and peri-implant stresses and had a greater effect on resultant stresses than increased cusp inclination.…”

Section: Loading Directionmentioning

confidence: 98%

“…In summary, occlusal contacts that occur away from the implant's axis generate greater implant and peri-implant stresses and had a greater effect on resultant stresses than increased cusp inclination. This mechanical behavior can be observed during a bending movement at the implant-bone interface, as the implant lacks an initial adaptive phase of movement, as opposed to a natural tooth with absorption of forces by the periodontal ligament [40].…”

Section: Loading Directionmentioning

confidence: 99%

Biomechanics of implant-supported restorations

et al. 2023

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The rehabilitation of patients with dental implant-supported restorations is an ideal treatment option in contemporary dentistry. The aim of this review was to compile and to demonstrate the mechanical response during loading condition, on the stress distributions of implant-supported prostheses. The findings show that the majority of stresses were concentrated in the cervical region of the implant/abutment interface and that they can be affected by several clinical parameters and loading conditions. Finally, the final prosthetic design should combine superior mechanical response, long-term survival rate and allow patient satisfaction.

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Finite Element Analysis of effect of cusp inclination and occlusal contacts in PFM and PEEK implant-supported crowns on resultant stresses

Cited by 6 publications

References 23 publications

Hybrid Prosthesis versus Overdenture: Effect of BioHPP Prosthetic Design Rehabilitating Edentulous Mandible

Hybrid Prosthesis versus Overdenture: Effect of BioHPP Prosthetic Design Rehabilitating Edentulous Mandible

The effect of two different bar materials constructed with CAD/CAM technology on implant retained mandibular overdentures: radiographic evaluation.

Biomechanics of implant-supported restorations

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