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The article discusses studies which show that full-ceramic prosthetic restorations for single crowns (SCs) and fixed dental prostheses (FDPs) are high quality and have a satisfactory survival rate comparable to porcelain-fused-to-metal (PFM). These studies include the survival outcome and complications in a retrospective clinical study of complete-arch fixed implant-supported prostheses (CAFIPs), the prevalence of prosthetic complications, and clinical performance of implant-supported FDPs.

The article discusses research published in the 2021 issue of the "International Journal of Environmental Research and Public Health" which evaluated the use of short dental implants compared to standard dental implants. The research reviewed studies on short implants and standard-length implants placed in augmented and nonaugmented edentulous sites, short implant survival, stability and marginal bone levels, and implants placed in the posterior maxilla and in medically compromised patients.

An introduction to articles published within the issue is presented, including one on the management of peri-implantitis by bonding a nanobiopolymer to a titanium (Ti) alloy surface tested for antimicrobial activity, another which demonstrated the feasibility to coat titanium with bioglass and that the treatment could promote a regenerative environment around dental implants, and another on the potential implications for clinical use of engineered nanotubules on Ti surfaces.

In head and neck cancer patients receiving dental implants prior to radiotherapy, backscatter from titanium increases the radiation dose close to the surface, and may affect the osseointegration. The dose-dependent effects of ionizing radiation on human osteoblasts (hOBs) were investigated. The hOBs were seeded on machined titanium, moderately rough fluoride-modified titanium, and tissue culture polystyrene, and cultured in growth- or osteoblastic differentiation medium (DM). The hOBs were exposed to ionizing γ-irradiation in single doses of 2, 6 or 10 Gy. Twenty-one days post-irradiation, cell nuclei and collagen production were quantified. Cytotoxicity and indicators of differentiation were measured and compared to unirradiated controls. Radiation with backscatter from titanium significantly reduced the number of hOBs but increased the alkaline phosphatase activity in both types of medium when adjusted to the relative cell number on day 21. Irradiated hOBs on the TiF-surface produced similar amounts of collagen as unirradiated controls when cultured in DM. The majority of osteogenic biomarkers significantly increased on day 21 when the hOBs had been exposed to 10 Gy, while the opposite or no effect was observed after lower doses. High doses reinforced with backscatter from titanium resulted in smaller but seemingly more differentiated subpopulations of osteoblasts. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this study was to investigate a guided implant surgery procedure performed without any manual processes, by assessing the in vivo results following a digital planning and placement of dental implants using surgical templates. Materials and Methods: Eligible patients were screened and enrolled in this prospective clinical study. A cone beam computed tomography (CBCT) scan was acquired, and the remaining dentition and soft tissues were recorded by an intraoral scanner after enrollment. The CBCT data and intraoral scan were fused in the planning software. The prosthetic reconstructions were digitally designed by a prosthodontist, and the ideal position of the dental implants was determined. The surgical template was digitally designed based on this plan, and a guide design was exported and manufactured in a stereolithographic process. The entire surgical procedure was performed with the aid of the template. An intraoral scan was performed 10 days after stage-two surgery using scan bodies placed on the implants. Digital preoperative and postoperative models were compared, and the metric difference between the planned and achieved implant positions was calculated. Results: Twenty-seven implants were placed in 20 patients using tooth-supported surgical templates after a digital planning procedure. No implants were lost during the study period. The mean lateral deviation measured at the coronal point was 1.05 mm (SD: 0.59; range: 2.74 to 0.36). The mean lateral deviation measured at the apical point was 1.63 mm (SD: 1.05; range: 5.16 to 0.56). The mean depth displacement was + 0.48 mm (SD: 0.50; range: 1.33 to -0.52). The mean angle deviation was 3.85 degrees (SD: 1.83; range: 8.6 to 1.25). Conclusion: A simplified full digital planning procedure yields results comparable to conventional guided implant surgery. The main deviation between the planned and achieved implant positions in this prospective clinical study was angular. More clinical studies are needed to verify the procedure further. [ABSTRACT FROM AUTHOR]

Objectives: To evaluate osteogenic markers and alveolar ridge profile changes in guided bone regeneration (GBR) of chronic noncontained bone defects using a nonresorbable TiO2 block. Materials and Methods: Three buccal bone defects were created in each hemimandible of eight beagle dogs and allowed to heal for 8 weeks before GBR. Treatment was assigned by block randomization: TiO2 block: TiO2‐scaffold and a collagen membrane, DBBM particulates: Deproteinized bovine bone mineral (DBBM) and a collagen membrane, Empty control: Only collagen membrane. Bone regeneration was assessed on two different healing timepoints: early (4 weeks) and late healing (12 weeks) using several immunohistochemistry markers including alpha‐smooth muscle actin (α‐SMA), osteopontin, osteocalcin, tartrate‐resistant acid phosphatase, and collagen type I. Histomorphometry was performed on Movat Pentachrome‐stained and Von Kossa/Van Gieson‐stained sections. Stereolithographic (STL) models were used to compare alveolar profile changes. Results: The percentage of α‐SMA and osteopontin increased in TiO2 group after 12 weeks of healing at the bone‐scaffold interface, while collagen type I increased in the empty control group. In the defect area, α‐SMA decreased in the empty control group, while collagen type I increased in the DBBM group. All groups maintained alveolar profile from 4 to 12 weeks, but TiO2 group demonstrated the widest soft tissue contour profile. Conclusions: The present findings suggested contact osteogenesis when GBR is performed with a TiO2 block or DBBM particulates. The increase in osteopontin indicated a potential for bone formation beyond 12 weeks. The alveolar profile data indicated a sustained lateral increase in lateral bone augmentation using a TiO2 block and a collagen membrane, as compared with DBBM and a collagen membrane or a collagen membrane alone. [ABSTRACT FROM AUTHOR]

The article focuses on the several review studies on the alternatives to metal ceramic in prosthetics. It offers various examples of restorations combined with development of improved production technology such as ceramic implant-supported single crowns supported by zirconia implants and fixed dental prostheses. Evaluation of the survival and technical complication rates of all-ceramic implant-supported single crowns also is discussed.

Dental implant-related abstracts are presented including the abstracts "Accuracy of digital versus conventional implant impressions" by S.J. Lee and others, "Accuracy of digital impressions of multiple dental implants: An in vitro study" by S. Vandeweghe and others, and "A novel method to evaluate precision of optical implant impressions with commercial scan bodies--An experimental approach" by T. Flügge and others.

The article presents abstracts concerning dental implants including the articles "Short implants versus longer implants in vertically augmented posterior mandibles: A randomized controlled trial with 5-year after loading follow-up" by P. Felice and others, "Success rate of short dental implants supporting single crowns and fixed bridges" by H. Malmstrom and others, and "Denture-related biomechanical factors for fixed partial dentures retained on short dental implants" by B. Pommer and others.

The article presents several abstracts on dental implants, including one by M. Esposito, M. G. Grusovin, H. Maghaireh et al. on dental implant loading, one by B. R. Chrcanovic, T. Albrektsson, and A. Wennerberg on functional loading and dental implant failure rates and one by F. Bassi, A. B. Carr, T. L. Chang et al. on the longevity of dental implants.

The article presents several abstracts related to dental implants along with reviews of the abstracts, including an abstract on dental implants in irradiated patients by E. Schiegnitz, B. Al-Nawas, K. A. Grötz et al., one on diabetes and oral implant failure by B. R. Chrcanovic, T. Albrektsson and A Wennerberg and one on dental implants in diabetics by P. A. Katyayan, M. Katyayan and R. J. Shah.

The author discusses the use of antibiotics after dental implant procedures. He mentions the possibility of infections at the site of the implant, the patterns of prescribing antibiotics as a prophylactic measure, and the issue of how useful such prescriptions are.

The article presents a study on the osseointegration capacity of titanium implants coated with proline-rich synthetic peptides in a rabbit model. It discusses the materials and methods used in the study, the secondary structure of dissolved and adsorbed peptides, and observations on surface coating and tissue fluid.

The article presents several abstracts on dentistry, including abstracts on short dental implants, the treatment of atrophic posterior maxilla and short implants in mandibles.