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Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Biomaterials".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 8778

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Special Issue Editor

Prof. Dr. Marina Meleșcanu Imre

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Guest Editor

Department of Complete Denture, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 020221 Bucharest, Romania
Interests: dental materials; biocompatibility; dental implants; digital dentistry

Special Issue Information

Dear Colleagues,

The purpose of this Special Issue is to highlight the trends regarding the materials and techniques used for dental implant oral rehabilitation. Concerning the dental materials, it will reveal how our current knowledge may provide new ways to obtain such materials with superior clinical qualities, including improved oral biocompatibility. As we all know, the digital and CAD-CAM technology in prosthetic dentistry is a dynamic and game-changing field of evolution, offering new perspectives for both researchers and clinicians. Starting from the data acquisition, conventional impression materials versus intra-oral scanning techniques, continuing with materials that can be milled or 3D printed, there is a huge area of research that has yet to be investigated. For this Special Issue, we would like to encourage both researchers and clinicians to submit original research, review articles, and communications regarding these new developments. I would be honored to collaborate with you on this project.

Yours sincerely,

Prof. Dr. Marina Meleșcanu Imre
Guest Editor

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Keywords

dental prosthetic materials
3D printed materials
conventional impression materials
intra oral scanning technique
CAD CAM technology
oral materials biocompatibility
dental implants materials

Published Papers (5 papers)

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Research

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17 pages, 5314 KiB

Open AccessArticle

Three-Dimensional Peri-Implant Tissue Changes in Immediately vs. Early Placed Tapered Implants Restored with Two Different Ceramic Materials—1 Year Results

by Malin Strasding, Yuwon Jeong, Laurent Marchand, Stefan P. Hicklin, Irena Sailer, Minji Sun and Hyeonjong Lee

Materials 2023, 16(16), 5636; https://doi.org/10.3390/ma16165636 - 15 Aug 2023

Cited by 1 | Viewed by 939

Abstract

Background: A prospective multi-center randomized controlled clinical trial was performed to digitally analyze tissue volume changes in immediately and early placed implants with simultaneous bone augmentation restored with two different all-ceramic materials. Methods: A total of 60 patients received 60 bone-level tapered implants (BLT, Straumann AG) immediately (n = 30) or early placed, 8–10 weeks after tooth extraction, (n = 30). Implants were restored with all-ceramic single crowns fabricated out of zirconia (Lava Plus, 3M), or lithium disilicate (E.max CAD, Ivoclar Vivadent AG) bonded to titanium base abutments (Variobase for Cerec, Straumann AG). Impressions were taken at baseline (BL), 6 and 12 months, and STL data were used to define an area of interest (AOI) to analyze peri-implant volume changes and midfacial recessions. Results: For immediate placement, a mean volume loss of −5.56 mm³ (±5.83 mm³) was found at 6 months, and of −6.62 mm³ (±6.56 mm³) at 12 months. For early placement, a mean volume loss of −1.99 mm³ (±5.82 mm³) at 6 months, and of −3.7 mm³ (±5.62 mm³) at 12 months was found. The differences in volume loss at 12 months between the two implant placement protocols were significant (p = 0.005). In both groups, mean midfacial recessions of 0.48 mm (±0.52) occurred. Conclusions: A more pronounced peri-implant volume loss can be expected 12 months after immediate implant placement compared with early placement. Full article

(This article belongs to the Special Issue Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants)

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13 pages, 2692 KiB

Open AccessArticle

The Effect of Sterilization on the Accuracy and Fit of 3D-Printed Surgical Guides

by Christine Yazigi, M. Sad Chaar, Reinhard Busch and Matthias Kern

Materials 2023, 16(15), 5305; https://doi.org/10.3390/ma16155305 - 28 Jul 2023

Cited by 1 | Viewed by 988

Abstract

This study was conducted to evaluate the accuracy of 3D-printed surgical guides before and after sterilization in a steam sterilizer. A test-model incorporating three implant replicas was customized. A total of forty guides were printed from five printable resins. A group made from a self-curing composite served as control group. The guides were checked for fit. Vertical discrepancies between the model and guides were measured at standardized points at a load of 500 g (P1). The guides were connected to implant replicas and scanned, and their angles were digitally measured. The specimens were sterilized in a steam sterilizer at 121 °C for 20 min at 2 bar pressure. Vertical discrepancies (P2) and angulations were remeasured. Additionally, the specimens were repositioned with an increased load, and measurements were repeated (P3). All specimens were repositionable after sterilization. The smallest variation in discrepancy at a 500 g load was 428 µm, whereas the greatest was 1487 µm. Under an increased force, the smallest change was 94 µm, while the greatest was 260 µm. The level of significance α = 0.05 (95% confidence interval) was set for all tests. The variation in the measured angles was not statistically significant (Kruskal–Wallis’s test, p > 0.05). The accuracy was affected by the material and sterilization, but it was clinically acceptable when an increased load was applied during repositioning. Full article

(This article belongs to the Special Issue Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants)

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25 pages, 6404 KiB

Open AccessArticle

Short and Ultra-Short Implants, in Association with Simultaneous Internal Sinus Lift in the Atrophic Posterior Maxilla: A Five-Year Retrospective Study

by Giorgio Lombardo, Annarita Signoriello, Mauro Marincola, Pietro Liboni, Paolo Faccioni, Alessandro Zangani, Antonio D’Agostino and Pier Francesco Nocini

Materials 2022, 15(22), 7995; https://doi.org/10.3390/ma15227995 - 12 Nov 2022

Cited by 3 | Viewed by 2339

Abstract

Recent short-term studies suggested the use of short and ultra-short implants in association with a modified osteotome sinus floor elevation (internal sinus lift) technique for the treatment of edentulous resorbed posterior maxilla. The aim of this retrospective study was to investigate this hypothesis in locking-taper implants with a mid-term follow-up of 5 years. Overall, 155 implants (32, 100, and 23 of, respectively, 5.0 mm, 6.0 mm, and 8.0 mm length) were positioned in the atrophic upper maxilla of 79 patients, and 151 implants were loaded with single crowns. Overall implant survival after 5 years was 94.84%. Implant survival for each length group was 93.75%, 94%, and 100% for 5.0, 6.0, and 8.0 mm length, respectively. Preoperative residual crestal bone height of 4.45 (1.3) mm increased to 9.25 (2.13) mm after implant placement and settled at 6.35 (1.73) mm after loading and at 5.25 (1.68) mm at follow-up. Elevation of the Schneiderian membrane was 4.8 (2.46) mm after implant placement, 3.06 (1.3) mm after loading, and 1.46 (1.06) mm at follow-up. Mean variations of peri-implant crestal bone loss and first bone-to-implant contact point were, respectively, −0.36 (1.3) mm and −0.62 (1.15) mm. It can be confirmed that internal sinus lift procedure revealed stable bone gain and negligible resorption at mid-term follow-up for atrophic upper crests with reduced height. Full article

(This article belongs to the Special Issue Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants)

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10 pages, 1901 KiB

Open AccessArticle

Effects of Autoclave Sterilization and Multiple Use on Implant Scanbody Deformation In Vitro

by Takamitsu Kato, Noriyuki Yasunami, Akihiro Furuhashi, Koma Sanda and Yasunori Ayukawa

Materials 2022, 15(21), 7717; https://doi.org/10.3390/ma15217717 - 2 Nov 2022

Cited by 2 | Viewed by 1472

Abstract

In the intraoral scanner (IOS) impression technique for dental implants, a scanbody (SB) is connected to the implant and scanned. Poly(ether-ether-ketone) (PEEK) is a widely used material for SBs and it is recommended for single use. However, from the perspective of the Sustainable Development Goals, it is desirable to use these products multiple times. As SBs are used in patients’ mouths, proper sterilization is necessary for multiple uses. In the present study, the effect of autoclave treatment and connection/disconnection on SB deformation was investigated. The SB was connected to the implant and stereolithography (STL) data were obtained. Then, the SB was disconnected and underwent autoclave treatment, or was connected and disconnected multiple times, or underwent a combination of both processes. The results showed that there were significant differences in the distance and angle when comparing SBs before and after the autoclave treatment, but repeated connections with or without autoclave treatment had no significant impact on the measured values. The surface texture, observed with scanning electron microscopy, showed that a groove was observed on the surface of the SB, but the groove did not show major changes after 10 connection/autoclave processes. These results indicate that autoclave sterilization has some impact on SB deformation but connection/disconnection itself may not have a huge impact on SB deformation. Full article

(This article belongs to the Special Issue Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants)

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Review

Jump to: Research

22 pages, 2504 KiB

Open AccessReview

Autophagy Plays Multiple Roles in the Soft-Tissue Healing and Osseointegration in Dental Implant Surgery—A Narrative Review

by Alexandra Ripszky Totan, Marina Melescanu Imre, Simona Parvu, Daniela Meghea, Radu Radulescu, Dan Sebastian Alexandru Enasescu, Mihai Radu Moisa and Silviu Mirel Pituru

Materials 2022, 15(17), 6041; https://doi.org/10.3390/ma15176041 - 1 Sep 2022

Cited by 2 | Viewed by 2261

Abstract

Dental endo-osseous implants have become a widely used treatment for replacing missing teeth. Dental implants are placed into a surgically created osteotomy in alveolar bone, the healing of the soft tissue lesion and the osseointegration of the implant being key elements to long-term success. Autophagy is considered the major intracellular degradation system, playing important roles in various cellular processes involved in dental implant integration. The aim of this review is an exploration of autophagy roles in the main cell types involved in the healing and remodeling of soft tissue lesions and implant osseointegration, post-implant surgery. We have focused on the autophagy pathway in macrophages, endothelial cells; osteoclasts, osteoblasts; fibroblasts, myofibroblasts and keratinocytes. In macrophages, autophagy modulates innate and adaptive immune responses playing a key role in osteo-immunity. Autophagy induction in endothelial cells promotes apoptosis resistance, cell survival, and protection against oxidative stress damage. The autophagic machinery is also involved in transporting stromal vesicles containing mineralization-related factors to the extracellular matrix and regulating osteoblasts’ functions. Alveolar bone remodeling is achieved by immune cells differentiation into osteoclasts; autophagy plays an important and active role in this process. Autophagy downregulation in fibroblasts induces apoptosis, leading to better wound healing by improving excessive deposition of extracellular matrix and inhibiting fibrosis progression. Autophagy seems to be a dual actor on the scene of dental implant surgery, imposing further research in order to completely reveal its positive features which may be essential for clinical efficacy. Full article

(This article belongs to the Special Issue Advanced Materials and Techniques in Oral Health Rehabilitation with Dental Implants)

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