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  1. Article: Diamond-like carbon coating reduces connection screw head stripping after multiple tightening.

    Pera, Francesco / Kim, Byung Chan / Pesce, Paolo / Menini, Maria / Troiano, Giuseppe / Zhurakivska, Khrystyna

    The Journal of oral implantology

    2024  

    Abstract: The stability of implant-abutment joint is fundamental for the long-term success of implant rehabilitation. The screw loosening, fracture, and head deformation are among the most common mechanical complications. Several surface treatments of titanium ... ...

    Abstract The stability of implant-abutment joint is fundamental for the long-term success of implant rehabilitation. The screw loosening, fracture, and head deformation are among the most common mechanical complications. Several surface treatments of titanium screws have been proposed to improve their resistance and stability. Diamond-like carbon (DLC) coating of the materials is widely used to increase their wear resistance and durability. The present study aimed to evaluate the effect of carbon fiber coating on the screw head on screw removal torque and screw head stripping. One hundred titanium implant screws were used, 50 without coating (Group 1) and 50 with DLC coating of the screw head (Group 2). Each screw was tightened with a torque of 25Ncm and unscrewed ten times. The removal torque was measured with a digital cap torque tester for each loosening. Optical 3d measurement of the screw head surface was performed by a fully automatic machine before and after multiple tightening to investigate surface modifications. The reverse torque values decreased with repeated tightening and loosening cycles in both groups without significant differences (p>0.05). Optical measurements of surface dimensions revealed average changes of 0.0357mm in Group 1 and 0.02312mm in Group 2, which resulted to be statistically significant (p<0.001). The DLC coating of the retention screw head can prevent its distortion and wear, especially after multiple tightening.
    Language English
    Publishing date 2024-02-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 448462-9
    ISSN 1548-1336 ; 0160-6972
    ISSN (online) 1548-1336
    ISSN 0160-6972
    DOI 10.1563/aaid-joi-D-23-00072R3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Diamond-Like Carbon Coating Reduces Connection Screw Head Stripping After Multiple Tightening Instances.

    Pera, Francesco / Kim, Byung Chan / Pesce, Paolo / Menini, Maria / Troiano, Giuseppe / Zhurakivska, Khrystyna

    The Journal of oral implantology

    2024  Volume 50, Issue 1, Page(s) 45–49

    Abstract: The stability of implant-abutment joint is fundamental for the long-term success of implant rehabilitation. The screw loosening, fracture, and head deformation are among the most common mechanical complications. Several surface treatments of titanium ... ...

    Abstract The stability of implant-abutment joint is fundamental for the long-term success of implant rehabilitation. The screw loosening, fracture, and head deformation are among the most common mechanical complications. Several surface treatments of titanium screws have been proposed to improve their resistance and stability. Diamond-like carbon (DLC) coating of the materials is widely used to increase their wear resistance and durability. The present study aimed to evaluate the effect of carbon fiber coating on the screw head on screw removal torque and screw head stripping. One hundred titanium implant screws were used, 50 without coating (Group 1) and 50 with DLC coating of the screw head (Group 2). Each screw was tightened with a torque of 25 Ncm and unscrewed 10 times. The removal torque was measured with a digital cap torque tester for each loosening. Optical 3d measurement of the screw head surface was performed by a fully automatic machine before and after multiple tightening to investigate surface modifications. The reverse torque values decreased with repeated tightening and loosening cycles in both groups without significant differences (P > .05). Optical measurements of surface dimensions revealed average changes of 0.0357 mm in Group 1 and 0.02312 mm in Group 2, which resulted to be statistically significant (P < .001). The DLC coating of the retention screw head can prevent its distortion and wear, especially after multiple tightening.
    MeSH term(s) Dental Implants ; Carbon ; Titanium ; Dental Stress Analysis/methods ; Torque ; Bone Screws ; Dental Abutments
    Chemical Substances Dental Implants ; Carbon (7440-44-0) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2024-04-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 448462-9
    ISSN 1548-1336 ; 0160-6972
    ISSN (online) 1548-1336
    ISSN 0160-6972
    DOI 10.1563/aaid-joi-D-23-00072
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Adjunctive use of locally delivered host-modulators in intra-bony defects as part of step 2 periodontal therapy: systematic review, meta-analysis and trial sequential analysis.

    Arena, Claudia / Mariani, Pierluigi / Russo, Diana / Zhurakivska, Khrystyna / Laino, Luigi

    Evidence-based dentistry

    2023  Volume 24, Issue 2, Page(s) 91–92

    Abstract: Background: This systematic review and meta-analysis aimed at investigate the role of locally delivered host-modulators in combination with step 2 of periodontal therapy in reducing probing pocket depth, improving clinical attachment level and reducing ... ...

    Abstract Background: This systematic review and meta-analysis aimed at investigate the role of locally delivered host-modulators in combination with step 2 of periodontal therapy in reducing probing pocket depth, improving clinical attachment level and reducing bone defect depth in intra-bony defects.
    Highlight: RCT with at least 6 months follow-up were included in this study. Risk of bias assessment was performed with Cochrane collaboration tool and Grade GRADEpro. In addition, meta-analysis and trial sequential analysis were used to aggregate the available evidence. 22 studies met the inclusion criteria and were included in this systematic review. At 6 months locally delivered host-modulators significantly improved PD and CAL and bone defect depth.
    Conclusion: Considering the emerging role of host-inflammatory response in the treatment of periodontitis, several studies are exploring the role of locally delivered host modulators as an adjunct to step 2 of periodontal therapy.
    MeSH term(s) Humans ; Periodontitis/drug therapy ; Dental Care ; Treatment Outcome
    Language English
    Publishing date 2023-05-10
    Publishing country England
    Document type Systematic Review ; Meta-Analysis ; Journal Article
    ZDB-ID 1457588-7
    ISSN 1476-5446 ; 1462-0049
    ISSN (online) 1476-5446
    ISSN 1462-0049
    DOI 10.1038/s41432-023-00877-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: The Immune Cells in the Development of Oral Squamous Cell Carcinoma.

    Caponio, Vito Carlo Alberto / Zhurakivska, Khrystyna / Lo Muzio, Lorenzo / Troiano, Giuseppe / Cirillo, Nicola

    Cancers

    2023  Volume 15, Issue 15

    Abstract: A still unresolved issue surrounding tumor formation concerns the role that the immune system plays in preventing the formation and progression of neoplasia, including oral squamous cell carcinoma (OSCC). Antitumor immunity has historically been seen as ... ...

    Abstract A still unresolved issue surrounding tumor formation concerns the role that the immune system plays in preventing the formation and progression of neoplasia, including oral squamous cell carcinoma (OSCC). Antitumor immunity has historically been seen as a critical barrier for cancer cells to develop, grow and spread, and this can be modulated using immunotherapies to achieve antitumor clinical responses. However, it has recently become clear that tumor-associated immunity, particularly the inflammatory microenvironment, has the paradoxical effect of enhancing tumorigenesis and progression. In this review, we discuss the multifaceted function of infiltrating immune cells in suppressing or promoting premalignancy and cancer. In particular, we report on the evidence supporting a role for T lymphocytes, dendritic cells, macrophages, and neutrophils in the development and progression of oral potentially malignant disorders (OPMD) and OSCC. We also draw attention to the clinical relevance of immune cell phenotypes and associated molecules for use as biomarkers and to the translatability of current research findings to improve classification systems and precision medicine in patients with OSCC.
    Language English
    Publishing date 2023-07-26
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers15153779
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Inter and intra-operator reliability of Lekholm and Zarb classification and proposal of a novel radiomic data-driven clustering for qualitative assessment of edentulous alveolar ridges.

    Troiano, Giuseppe / Rapani, Antonio / Fanelli, Francesco / Berton, Federico / Caroprese, Marino / Lombardi, Teresa / Zhurakivska, Khrystyna / Stacchi, Claudio

    Clinical oral implants research

    2024  

    Abstract: Objectives: The present study was conducted to evaluate the reproducibility of Lekholm and Zarb classification system (L&Z) for bone quality assessment of edentulous alveolar ridges and to investigate the potential of a data-driven approach for bone ... ...

    Abstract Objectives: The present study was conducted to evaluate the reproducibility of Lekholm and Zarb classification system (L&Z) for bone quality assessment of edentulous alveolar ridges and to investigate the potential of a data-driven approach for bone quality classification.
    Materials and methods: Twenty-six expert clinicians were asked to classify 110 CBCT cross-sections according to L&Z classification (T0). The same evaluation was repeated after one month with the images put in a different order (T1). Intra- and inter-examiner agreement analyses were performed using Cohen's kappa coefficient (CK) and Fleiss' kappa coefficient (FK), respectively. Additionally, radiomic features extraction was performed from 3D edentulous ridge blocks derived from the same 110 CBCTs, and unsupervised clustering using 3 different clustering methods was used to identify patterns in the obtained data.
    Results: Intra-examiner agreement between T0 and T1 was weak (CK 0.515). Inter-examiner agreement at both time points was minimal (FK at T0: 0.273; FK at T1: 0.243). The three different unsupervised clustering methods based on radiomic features aggregated the 110 CBCTs in three groups in the same way.
    Conclusions: The results showed low agreement among clinicians when using L&Z classification, indicating that the system may not be as reliable as previously thought. The present study suggests the possible application of a reproducible data-driven approach based on radiomics for the classification of edentulous alveolar ridges, with potential implications for improving clinical outcomes. Further research is needed to determine the clinical significance of these findings and to develop more standardized and accurate methods for assessing bone quality of edentulous alveolar ridges.
    Language English
    Publishing date 2024-04-17
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 1067626-0
    ISSN 1600-0501 ; 0905-7161
    ISSN (online) 1600-0501
    ISSN 0905-7161
    DOI 10.1111/clr.14271
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Prosthesis Emergence Angle Influences Marginal Bone Level for External Connection Implants: A Cross-Sectional Study.

    Montaruli, Graziano / Dedola, Alberto / Russo, Diana / Zhurakivska, Khrystyna / Laino, Luigi / Mastrangelo, Filiberto / Troiano, Giuseppe

    The International journal of periodontics & restorative dentistry

    2023  , Issue 7, Page(s) s205–s216

    Abstract: Purpose: To retrospectively evaluate the influence of prosthetic features on marginal bone level changes around bone-level implants with an external hex connection.: Materials and methods: A total of 100 patients with 166 implants and cemented crowns ...

    Abstract Purpose: To retrospectively evaluate the influence of prosthetic features on marginal bone level changes around bone-level implants with an external hex connection.
    Materials and methods: A total of 100 patients with 166 implants and cemented crowns were included. Demographic and clinical data were collected. Prosthetic features were radiographically evaluated, including emergence angle (EA), emergence profile (EP), crown-implant ratio (CIR), and abutment height. Marginal bone levels were measured on intraoral radiographs taken at baseline and after at least 1 year. The correlation between prosthetic features and marginal bone loss (MBL) was then investigated.
    Results: The mean follow-up time was 43.94 months. Implant length varied between 5 and 13 mm. The mean height of the abutments used was 1.55 mm. EA measured an average 30.62 degrees (± 13.20) mesially and 29.45 degrees (± 13.07) distally. The CIR was 0.99 (± 0.26). The mean MBL was 0.19 mm on the mesial side and 0.20 mm on distal side of the implants. Significant positive associations emerged between MBL and implant length (P < .005) and with EA (P < .05). A convex profile of the crown was shown to be associated with a higher distal MBL (P = .025) compared to concave and straight profiles.
    MeSH term(s) Humans ; Dental Implants ; Cross-Sectional Studies ; Retrospective Studies ; Alveolar Bone Loss/diagnostic imaging ; Alveolar Bone Loss/etiology ; Dental Implantation, Endosseous ; Crowns ; Dental Prosthesis, Implant-Supported
    Chemical Substances Dental Implants
    Language English
    Publishing date 2023-10-25
    Publishing country United States
    Document type Journal Article
    ISSN 1945-3388
    ISSN (online) 1945-3388
    DOI 10.11607/prd.6226
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Can radiomic features extracted from intra-oral radiographs predict physiological bone remodelling around dental implants? A hypothesis-generating study.

    Troiano, Giuseppe / Fanelli, Francesco / Rapani, Antonio / Zotti, Matteo / Lombardi, Teresa / Zhurakivska, Khrystyna / Stacchi, Claudio

    Journal of clinical periodontology

    2023  Volume 50, Issue 7, Page(s) 932–941

    Abstract: Aim: The rate of physiological bone remodelling (PBR) occurring after implant placement has been associated with the later onset of progressive bone loss and peri-implantitis, leading to medium- and long-term implant therapy failure. It is still ... ...

    Abstract Aim: The rate of physiological bone remodelling (PBR) occurring after implant placement has been associated with the later onset of progressive bone loss and peri-implantitis, leading to medium- and long-term implant therapy failure. It is still questionable, however, whether PBR is associated with specific bone characteristics. The aim of this study was to assess whether radiomic analysis could reveal not readily appreciable bone features useful for the prediction of PBR.
    Materials and methods: Radiomic features were extracted from the radiographs taken at implant placement (T0) using LifeX software. Because of the multi-centre design of the source study, ComBat harmonization was applied to the cohort. Different machine-learning models were trained on selected radiomic features to develop and internally validate algorithms capable of predicting high PBR. In addition, results of the algorithm were included in a multivariate analysis with other clinical variables (tissue thickness and depth of implant position) to test their independent correlation with PBR.
    Results: Specific radiomic features extracted at T0 are associated with higher PBR around tissue-level implants after 3 months of unsubmerged healing (T1). In addition, taking advantage of machine-learning methods, a naive Bayes model was trained using radiomic features selected by fast correlation-based filter (FCBF), which showed the best performance in the prediction of PBR (AUC = 0.751, sensitivity = 66.0%, specificity = 68.4%, positive predictive value = 73.3%, negative predictive value = 60.5%). In addition, results of the whole model were included in a multivariate analysis with tissue thickness and depth of implant position, which were still found to be independently associated with PBR (p-value < .01).
    Conclusion: The combination of radiomics and machine-learning methods seems to be a promising approach for the early prediction of PBR. Such an innovative approach could be also used for the study of not readily disclosed bone characteristics, thus helping to explain not fully understood clinical phenomena. Although promising, the performance of the radiomic model should be improved in terms of specificity and sensitivity by further studies in this field.
    MeSH term(s) Humans ; Dental Implants ; Bayes Theorem ; Peri-Implantitis ; Bone Remodeling ; Retrospective Studies
    Chemical Substances Dental Implants
    Language English
    Publishing date 2023-03-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 188647-2
    ISSN 1600-051X ; 0303-6979
    ISSN (online) 1600-051X
    ISSN 0303-6979
    DOI 10.1111/jcpe.13797
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  8. Article: Rotational tolerances of a titanium abutment in the as-received condition and after screw tightening in a conical implant connection.

    Prisco, Rosario / Troiano, Giuseppe / Laino, Luigi / Zhurakivska, Khrystyna

    The journal of advanced prosthodontics

    2021  Volume 13, Issue 6, Page(s) 343–350

    Abstract: Purpose: The success of an implant-prosthetic rehabilitation is influenced by good implant health and an excellent implant-prosthetic coupling. The stability of implant-prosthetic connection is influenced by the rotational tolerance between anti- ... ...

    Abstract Purpose: The success of an implant-prosthetic rehabilitation is influenced by good implant health and an excellent implant-prosthetic coupling. The stability of implant-prosthetic connection is influenced by the rotational tolerance between anti-rotational features on the implant and those on the prosthetic component. The aim of this study is to investigate the rotational tolerance of a conical connection implant system and its titanium abutment counterpart, in various conditions.
    Material and methods: 10 preparable titanium abutments, having zero-degree angulation (MegaGen, Daegu, Korea) with an internal 5-degree conical connection, and 10 implants (MegaGen, Daegu, Korea) were used. Rotational tolerance between the connection of implant and titanium abutments was measured through the use of a tridimensional optics measuring system (Quick Scope QS250Z, Mitutoyo, Kawasaki, Japan) in the as-received condition (Time 0), after securing with a titanium screw tightening at 35 Ncm (Time 1), after tightening 4 times at 35 Ncm (Time 2), after tightening one more time at 45 Ncm (Time 3), and after tightening another 4 times at 45 Ncm (Time 4).
    Results: The group "Time 0" had the lowest values of rotational freedom (0.22 ± 0.76 degrees), followed by the group Time 1 (0.46 ± 0.83 degrees), the group Time 2 (1.01 ± 0.20 degrees), the group Time 3 (1.30 ± 0.85 degrees), and the group Time 4 (1.49 ± 0.17 degrees).
    Conclusion: The rotational tolerance of a conical connection is low in the "as received" condition but increases with repetitive tightening and with application of a torque greater than 35 Ncm.
    Language English
    Publishing date 2021-12-22
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2575831-7
    ISSN 2005-7814 ; 2005-7806
    ISSN (online) 2005-7814
    ISSN 2005-7806
    DOI 10.4047/jap.2021.13.6.343
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  9. Article: CAD/CAM Abutments in the Esthetic Zone: A Systematic Review and Meta-Analysis of Soft Tissue Stability.

    Lops, Diego / Romeo, Eugenio / Mensi, Magda / Troiano, Giuseppe / Zhurakivska, Khrystyna / Del Fabbro, Massimo / Palazzolo, Antonino

    Journal of clinical medicine

    2023  Volume 12, Issue 11

    Abstract: Computer-aided design and computer-aided manufacturing customized abutments are increasingly used in everyday clinical practice. Nevertheless, solid scientific evidence is currently lacking regarding their potential advantages in terms of soft tissue ... ...

    Abstract Computer-aided design and computer-aided manufacturing customized abutments are increasingly used in everyday clinical practice. Nevertheless, solid scientific evidence is currently lacking regarding their potential advantages in terms of soft tissue stability. The main aim of this systematic review and meta-analysis was to compare the soft tissue outcomes of prefabricated versus customized (CAD/CAM) abutments. The present review was registered with PROSPERO (CRD42020161875) and the protocol was developed according to the PRISMA statement. An electronic search was performed on three databases (PubMed, Embase and Cochrane Central) up to May 2023. Data extraction was followed by qualitative and quantitative analysis of the included studies. Three randomized controlled clinical trials and three controlled clinical trials (number of patients = 230; number of dental implants = 230) with a follow-up of between 12 and 36 months were included. No significant differences were observed between prefabricated versus customized (CAD/CAM) abutments regarding midfacial mucosal recession, interproximal papillae and pink aesthetic score (PES) after 12 months. Conclusion: The potential benefits of CAD/CAM abutments on soft tissues should be better clarified in future investigations. The usage of customized CAD/CAM abutments in everyday clinical practice should be based on a careful case-by-case evaluation (CRD42020161875).
    Language English
    Publishing date 2023-06-04
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12113847
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  10. Article ; Online: Impact of Circulating Cell-Free DNA (cfDNA) as a Biomarker of the Development and Evolution of Periodontitis.

    Viglianisi, Gaia / Santonocito, Simona / Polizzi, Alessandro / Troiano, Giuseppe / Amato, Mariacristina / Zhurakivska, Khrystyna / Pesce, Paolo / Isola, Gaetano

    International journal of molecular sciences

    2023  Volume 24, Issue 12

    Abstract: In the last few decades, circulating cell-free DNA (cfDNA) has been shown to have an important role in cell apoptosis or necrosis, including in the development and evolution of several tumors and inflammatory diseases in humans. In this regard, ... ...

    Abstract In the last few decades, circulating cell-free DNA (cfDNA) has been shown to have an important role in cell apoptosis or necrosis, including in the development and evolution of several tumors and inflammatory diseases in humans. In this regard, periodontitis, a chronic inflammatory disease that can induce the destruction of supporting components of the teeth, could represent a chronic inflammatory stimulus linked to a various range of systemic inflammatory diseases. Recently, a possible correlation between periodontal disease and cfDNA has been shown, representing new important diagnostic-therapeutic perspectives. During the development of periodontitis, cfDNA is released in biological fluids such as blood, saliva, urine and other body fluids and represents an important index of inflammation. Due to the possibility of withdrawing some of these liquids in a non-invasive way, cfDNA could be used as a possible biomarker for periodontal disease. In addition, discovering a proportional relationship between cfDNA levels and the severity of periodontitis, expressed through the disease extent, could open the prospect of using cfDNA as a possible therapeutic target. The aim of this article is to report what researchers have discovered in recent years about circulating cfDNA in the development, evolution and therapy of periodontitis. The analyzed literature review shows that cfDNA has considerable potential as a diagnostic, therapeutic biomarker and therapeutic target in periodontal disease; however, further studies are needed for cfDNA to be used in clinical practice.
    MeSH term(s) Humans ; Periodontitis/diagnosis ; Periodontitis/genetics ; Biomarkers ; Periodontal Diseases ; Cell-Free Nucleic Acids/genetics ; Neoplasms ; Inflammation
    Chemical Substances Biomarkers ; Cell-Free Nucleic Acids
    Language English
    Publishing date 2023-06-10
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24129981
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