Intraorally welded wing abutments supporting full-arch prostheses: A retrospective clinical study

Zuffellato, Nicolò; Massariol, Maurizio; Gandini, Andrea; Dovigo, Sergio

doi:10.17219/dmp/149470

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…5,20 Compared to titanium, high-performance polymers showed a decreased marginal bone loss and soft tissue recession during the initial healing phase by reducing the occlusal loads reaching the bone. 21,22 Moreover, a previous study revealed that unpolished polymers had a lower surface roughness than zirconia abutments, which will provide less biofilm accumulation and better soft tissue attachment; however, they found that the flexibility of these materials may cause a higher strain in the implant and peri-implant bone. 23 PEKK is a high-performance polymer claimed to have good shock absorption properties and high compressive strength due to the additional ketone group in its structure.…”

Section: Introductionmentioning

confidence: 99%

Strain gauge analysis and fracture resistance of implant-supported PEKK hybrid abutments restored with two crown materials: An in vitro study

El-Mahdy,

Aboelfadl,

Ahmed

et al. 2023

Dent. Med. Probl.

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Background. Polyetherketoneketone (PEKK) was recently introduced as an alternative to titanium and ceramic implant abutments due to its apparent ability to dissipate excessive strain around dental implants. However, the biomechanical behaviors of implant abutment crown systems may change depending on the crown and abutment material combinations used.Objectives. This study aimed to assess how the crown material affects strain generation and fracture resistance of PEKK hybrid abutment crowns. Material and methods.Sixteen dummy implants (Ø 3.7 × 11 mm), simulating maxillary first premolars, were restored with 16 milled PEKK hybrid abutments and randomly categorized into two groups according to the crown material (n = 8): Group C, milled composite crowns cemented on PEKK hybrid abutments; and Group Z, ultra-translucent zirconia crowns cemented on PEKK hybrid abutments. Before thermocycling, a cyanoacrylate-base adhesive was used to position two strain gauges on buccal and lingual crestal bone surfaces, and a vertical load (100 N) was applied to the central fossa to record the strain generated. Then, all samples were thermocycled between 5°C and 55°C before being loaded to fracture on a universal testing machine. Modes of failure were observed under an optical microscope, and representative samples were examined using a scanning electron microscope. Independent t-tests were used for intergroup comparisons. The significance level was set at (p < 0.05) for all tests.. Results.The results showed a significant difference between both groups. The zirconia group recorded significantly higher strain and fracture resistance values than the composite group (p < 0.001). There was a positive correlation between the strain developed in peri-implant crestal bone and fracture resistance of the abutment crown complex. Conclusions.Strains developed in both groups were within the acceptable clinical range. The crown material substantially impacted the strain and fracture of the PEKK hybrid abutment crown system.

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Section: Introductionmentioning

confidence: 99%

Strain gauge analysis and fracture resistance of implant-supported PEKK hybrid abutments restored with two crown materials: An in vitro study

El-Mahdy,

Aboelfadl,

Ahmed

et al. 2023

Dent. Med. Probl.

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“…The most frequently applied type of restoration is a crown placed on the abutment which is fixed to implant. Abutments have been manufactured of titanium (Ti) or its alloys, gold alloys, zirconium dioxide (ZrO 2 ), surgical stainless steel, polyether ether ketone (PEEK) and some other polymers [1][2][3]. Only Ti corrosion is thermodynamically unfavorable which explains its superiority as a dental implant material.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Titanium Dental Implant Abutments: Comparative Analysis and Surface Characterization

Kowalski,

Rylska,

Januszewicz

et al. 2023

Materials

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Metals subjected to the oral environment are prone to corrosion over time and this can be harmful. Metallic restoration components such as dental subgingival implant abutments are exposed to pH changes and different ions while in contact with saliva. The aim of the study was to evaluate the corrosion resistance of titanium dental implant abutments and to compare and contrast the surface characteristics of these alloys before and after corrosion. The corrosion examination (Ecorr, jcorr, OCP, polarization curve) of two implant abutments (TiDesign EV, Astra Tech, Dentsply, York, PA, USA; Individual Titanium Abutment, Apollo Implants Components, Pabianice, Poland) was performed in 0.9% NaCl and 5% HCl. Moreover, specimens were investigated using SEM-EDS before and after the corrosion test. The value of jcorr in NaCl was higher for Astra (34.2 × 10−8 ± 2.5 × 10−8 A/cm2) than for Apollo (8.8 × 10−8 ± 2.5 × 10−8 A/cm2). Whereas, in HCl, the opposite relationship was observed (Astra 2.9 × 10−4 ± 0.8 × 10−4 A/cm2 and Apollo 62.7 × 10−4 ± 9.3 × 10−4 A/cm2). An average reactive anodic current density in NaCl for Astra amounted up to ~0.2 × 10−5–1.5 × 10−5 A/cm2, while for Apollo-up to ~3.3–9.7 × 10−7 A/cm2. The composition of both alloys after corrosion in NaCl demonstrated some changes: a decrease in the Ti, and Al and an increase in oxygen content. Hence, both alloys after corrosion in HCl demonstrated some minor changes in the elemental composition. Based on the results it can be concluded that: 1. Astra and Apollo abutments revealed good corrosion resistance and a passivation layer on the surface. 2. Apollo abutments exhibited better corrosion resistance in a neutral environment, suggesting that Astra abutments were found to be more resistant to corrosion in an acidic medium.

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Prevalence of temporomandibular disorders diagnosis in patients treated with Herbst appliance: a systematic review and meta-analysis

Minervini,

Di Blasio,

Franco

et al. 2024

BMC Oral Health

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Background The Herbst appliance is an excellent therapy for treating class II malocclusions with increased overjet. Its mechanics involve propelling the mandibular bone using two pistons the patient cannot remove. The so-called bite-jumping keeps the mandible in a more anterior position for a variable period, usually at least 6 months. This appliance does not inhibit joint functions and movements, although there are scientific papers in the literature investigating whether this appliance can lead to temporomandibular disorders. This systematic review aims to evaluate whether Herbst’s device can cause temporomandibular diseases by assessing the presence of TMD in patients before and after treatment. Methods A literature search up to 3 May 2023 was carried out on three online databases: PubMed, Scopus and Web of Science. Only studies that evaluated patients with Helkimo scores and Manual functional analysis were considered, as studies that assessed the difference in TMD before and after Herbst therapy. Review Manager version 5.2.8 (Cochrane Collaboration) was used for the pooled analysis. We measured the odds ratio (OR) between the two groups (pre and post-Herbst). Results The included papers in this review were 60. Fifty-seven were excluded. In addition, a manual search was performed. After the search phase, four articles were considered in the study, one of which was found through a manual search. The overall effect showed that there was no difference in TMD prevalence between pre-Herbst and post-Herbst therapy (OR 0.74; 95% CI: 0.33–1.68). Conclusion Herbst appliance seems not to lead to an increase in the incidence of TMD in treated patients; on the contrary, it appears to decrease it. Further studies are needed to assess the possible influence of Herbst on TMDs.

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Intraorally welded wing abutments supporting full-arch prostheses: A retrospective clinical study

Cited by 3 publications

References 20 publications

Strain gauge analysis and fracture resistance of implant-supported PEKK hybrid abutments restored with two crown materials: An in vitro study

Strain gauge analysis and fracture resistance of implant-supported PEKK hybrid abutments restored with two crown materials: An in vitro study

Corrosion Resistance of Titanium Dental Implant Abutments: Comparative Analysis and Surface Characterization

Prevalence of temporomandibular disorders diagnosis in patients treated with Herbst appliance: a systematic review and meta-analysis

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