Zirconia Biocompatibility in Animal Studies - A Systematic Review

Zirconia is a metal used in dental implantology. Its biocompatibility was studied in vitro and in vivo, results of the studies being analyzed in reviews and meta analyses. The aim of this systematic review was to evaluate biocompatibility of zirconia in animal studies in vivo expressed as results of histomorphometric tests. Databases were searched from 1980 until February 2016, with different combination of the following MeSH terms: zirconium, biocompatibility, dental implants, in vivo, animal studies. Letters to the editors, case reports, commentaries, review articles and articles published in other languages then English were excluded. The search of PubMed, ScienceDirect and Google Scholar databases yielded 690 titles. After abstract screening and duplicate discarding 50 articles were identified and finally, 40 were included in the review. Most of the studies compared zirconia with titanium, a well established material for dental implants. In majority of the studies zirconia showed a similar osseointegration with titanium. Surface implant treatments, like sandblasted and etched zirconia (ZrO2-SLA), alumina toughed zirconia (ATZ), and powder injection molding (PIM) were used to improve osseointegration of zirconia with good results. In the light of histomorphometric test, zirconia, no matter physical and structural forms tested, is a biocompatible material.

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Nanomodified Peek Dental Implants: Bioactive Composites and Surface Modification—A Review

International Journal of Dentistry ◽

10.1155/2015/381759 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 61

Author(s):

Shariq Najeeb ◽

Zohaib Khurshid ◽

Jukka Pekka Matinlinna ◽

Fahad Siddiqui ◽

Mohammad Zakaria Nassani ◽

...

Keyword(s):

Dental Implants ◽

Plasma Etching ◽

Animal Studies ◽

Relevant Literature ◽

Melt Blending ◽

Gas Plasma ◽

Study Selection ◽

Bioactive Composites

Purpose. The aim of this review is to summarize and evaluate the relevant literature regarding the different ways how polyetheretherketone (PEEK) can be modified to overcome its limited bioactivity, and thereby making it suitable as a dental implant material.Study Selection. An electronic literature search was conducted via the PubMed and Google Scholar databases using the keywords “PEEK dental implants,” “nano,” “osseointegration,” “surface treatment,” and “modification.” A total of 16in vivoandin vitrostudies were found suitable to be included in this review.Results. There are many viable methods to increase the bioactivity of PEEK. Most methods focus on increasing the surface roughness, increasing the hydrophilicity and coating osseoconductive materials.Conclusion. There are many ways in which PEEK can be modified at a nanometer level to overcome its limited bioactivity. Melt-blending with bioactive nanoparticles can be used to produce bioactive nanocomposites, while spin-coating, gas plasma etching, electron beam, and plasma-ion immersion implantation can be used to modify the surface of PEEK implants in order to make them more bioactive. However, more animal studies are needed before these implants can be deemed suitable to be used as dental implants.

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Role of Stem Cells in Augmenting Dental Implant Osseointegration: A Systematic Review

Coatings ◽

10.3390/coatings11091035 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1035

Author(s):

Mohammed E. Sayed ◽

Maryam H. Mugri ◽

Mazen A. Almasri ◽

Manea Musa Al-Ahmari ◽

Shilpa Bhandi ◽

...

Keyword(s):

Systematic Review ◽

Stem Cells ◽

Bone Formation ◽

Dental Implants ◽

Mesenchymal Cells ◽

Graft Material ◽

Implant Surface ◽

Oral Rehabilitation

Dental implants are a widely used treatment modality for oral rehabilitation. Implant failures can be a result of many factors, with poor osseointegration being the main culprit. The present systematic review aimed to assess the effect of stem cells on the osseointegration of dental implants. An electronic search of the MEDLINE, LILACS, and EMBASE databases was conducted. We examined quantitative preclinical studies that reported on the effect of mesenchymal stem cells on bone healing after implant insertion. Eighteen studies that fulfilled the inclusion criteria were included. Various surface modification strategies, sites of placement, and cell origins were analyzed. The majority of the selected studies showed a high risk of bias, indicating that caution must be exercised in their interpretation. All the included studies reported that the stem cells used with graft material and scaffolds promoted osseointegration with higher levels of new bone formation. The mesenchymal cells attached to the implant surface facilitated the expression of bio-functionalized biomaterial surfaces, to boost bone formation and osseointegration at the bone–implant interfaces. There was a promotion of osteogenic differentiation of human mesenchymal cells and osseointegration of biomaterial implants, both in vitro and in vivo. These results highlight the significance of biomodified implant surfaces that can enhance osseointegration. These innovations can improve the stability and success rate of the implants used for oral rehabilitation.

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Use of DIAGNOdent and VistaProof in diagnostic of Pre-Cavitated Caries Lesions—A Systematic Review and Meta-Analysis

Journal of Clinical Medicine ◽

10.3390/jcm9010020 ◽

2019 ◽

Vol 9 (1) ◽

pp. 20 ◽

Cited By ~ 2

Author(s):

José Enrique Iranzo-Cortés ◽

José María Montiel-Company ◽

Teresa Almerich-Torres ◽

Carlos Bellot-Arcís ◽

José Manuel Almerich-Silla

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

A Value ◽

Published Evidence ◽

Meta Analyses ◽

Fail Safe ◽

Cavitated Lesions

Objective: To analyse the published evidence of the validity of DIAGNDOdent and VistaProof in diagnosing carious depths in pre-cavitated lesions. Material and methods: A systematic review was carried out after identifying a total of 184 articles, including 27 concerning the qualitative review and a subsequent meta-analysis. The quality of the studies was evaluated by using the QUADAS-2 tool. Results: For DIAGNOdent, the sensitivity value was 0.77, the specificity value was 0.75 and AUC was 0.81 for the global meta-analyses. In relation to subgroups, the values estimated 0.85, 0.76 and 0.86, respectively, for the in vivo group and 0.71, 0.75 and 0.83 for the in vitro group. For VistaProof, sensitivity was 0.81, specificity 0.75 and AUC had a value of 0.80 in the global meta-analysis. For the subgroups, these were considered at 0.75, 0.81 and 0.89, respectively, for the in vivo group and 0.91, 0.74 and 0.76 for the in vitro group. Neither case presented publication bias when analysing the funnel plot, the classic fail-safe number and Egger’s intercept. Conclusion: Both VistaProof and DIAGNOdent are valid as they offer a moderate to high diagnostic effectiveness for dentine depth in pre-cavitated lesions.

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Bioactive Surfaces vs. Conventional Surfaces in Titanium Dental Implants: A Comparative Systematic Review

Journal of Clinical Medicine ◽

10.3390/jcm9072047 ◽

2020 ◽

Vol 9 (7) ◽

pp. 2047 ◽

Cited By ~ 2

Author(s):

Nansi López-Valverde ◽

Javier Flores-Fraile ◽

Juan Manuel Ramírez ◽

Bruno Macedo de Sousa ◽

Silvia Herrero-Hernández ◽

...

Keyword(s):

Systematic Review ◽

Clinical Trials ◽

Dental Implants ◽

Animal Studies ◽

Statistical Significance ◽

Cochrane Collaboration ◽

In Vivo Experiments ◽

Bone To Implant Contact ◽

Bioactive Surfaces

Animal studies and the scarce clinical trials available that have been conducted suggest that bioactive surfaces on dental implants could improve the osseointegration of such implants. The purpose of this systematic review was to compare the effectiveness of osseointegration of titanium (Ti) dental implants using bioactive surfaces with that of Ti implants using conventional surfaces such as sandblasted large-grit acid-etched (SLA) or similar surfaces. Applying the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement, the MEDLINE, PubMed Central and Web of Science databases were searched for scientific articles in April 2020. The keywords used were “dental implants”, “bioactive surfaces”, “biofunctionalized surfaces”, and “osseointegration”, according to the question: “Do bioactive dental implant surfaces have greater osseointegration capacity compared with conventional implant surfaces?” Risk of bias was assessed using the Cochrane Collaboration tool. 128 studies were identified, of which only 30 met the inclusion criteria: 3 clinical trials and 27 animal studies. The average STROBE (STrengthening the Reporting of OBservational studies in Epidemiology) and ARRIVE (Animal Research: Reporting of In Vivo Experiments) scores were 15.13 ± 2.08 and 17.7±1.4, respectively. Implant stability quotient (ISQ) was reported in 3 studies; removal torque test (RTT)—in 1 study; intraoral periapical X-ray and microcomputed tomography radiological evaluation (RE)—in 4 studies; shear force (SF)—in 1 study; bone-to-implant contact (BIC)—in 12 studies; and BIC and bone area (BA) jointly—in 5 studies. All animal studies reported better bone-to-implant contact surface for bioactive surfaces as compared to control implants with a statistical significance of p < 0.05. Regarding the bioactive surfaces investigated, the best results were yielded by the one where mechanical and chemical treatment methods of the Ti surfaces were combined. Hydroxyapatite (HA) and calcium–phosphate (Ca–Ph) were the most frequently used bioactive surfaces. According to the results of this systematic review, certain bioactive surfaces have a positive effect on osseointegration, although certain coating biomolecules seem to influence early peri-implant bone formation. Further and more in-depth research in this field is required to reduce the time needed for osseointegration of dental implants.

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Mechanism of Action of Limonene in Tumor Cells: A Systematic Review and Metanalysis

Current Pharmaceutical Design ◽

10.2174/1381612826666201026152902 ◽

2020 ◽

Vol 26 ◽

Author(s):

Juliana de Vasconcelos Cerqueira Braz ◽

Fernanda Oliveira de Carvalho ◽

Daniele de Vasconcelos Cerqueira Meneses ◽

Fernanda Araújo Felipe Calixto ◽

Hericalizandra Santa Rosa Santana ◽

...

Keyword(s):

Systematic Review ◽

Tumor Regression ◽

Case Reports ◽

Meta Analysis ◽

Public Health Problem ◽

Major Public Health Problem ◽

Kappa Index ◽

Induced Apoptosis

Background: Cancer is a complex, multifactorial disease, and a major public health problem, as it is a leading cause of morbidity and mortality worldwide. Although treatments have significantly improved, there is a still a search for more effective drugs. One source for these are natural products (NPs). One NP that has shown anticancer activity is Limonene. However, the mechanisms of limonene's antiproliferative, anticancer and antineoplastic activity are not fully understood. Objective: The objective of this study is, therefore, to undertake a systematic review and meta-analysis of the literature on this subject. Methods: A comprehensive literature search was performed using the Scopus, MEDLINE-PubMed, Web of Science, and Science Direct databases using the keywords: "limonene", “cancer”, “neoplasm”, “tumor”. The inclusion criteria were: in vivo and in vitro studies on the use of limonene in cancer published in English, Portuguese and Spanish until December 2019. Review articles, meta-analyses, abstracts, conference papers, editorials/letters and case reports were excluded. Results: The search identified 3568 articles. Of which 126 were selected for full reading with 11 papers meeting the review criteria. Six more papers were added from the references of the initial 11 texts, giving a total of 17 papers. There was a high level of agreement on inclusion/exclusion (Kappa index > 80%). Risk of bias I the texts was shown to be high. Conclusion: The meta-analysis suggests that limonene acts mainly on tumor regression induced apoptosis, and is a promising natural product for use in the treatment of several types of cancer.

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Relation between bruxism and dental implants

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-8637201400040000032658 ◽

2014 ◽

Vol 62 (4) ◽

pp. 371-376 ◽

Cited By ~ 1

Author(s):

Leonardo Bueno TORCATO ◽

Paulo Renato Junqueira ZUIM ◽

Daniela Atili BRANDINI ◽

Rosse Mary FALCÓN-ANTENUCCI

Keyword(s):

Literature Review ◽

Dental Implants ◽

Animal Studies ◽

Case Reports ◽

Meta Analysis ◽

Experimental Studies ◽

Point Of View ◽

Dental Restoration ◽

Restoration Failure

OBJECTIVE: The aim of this study was to gather information and discuss the predictability of implant-supported prostheses in patients with bruxism by performing a literature review. METHODS: In order to select the studies included in this review, a detailed search was performed in PubMed and Medline databases, using the following key words: bruxism, dental implants, implant supported prosthesis, and dental restoration failure. Items that were included are: case reports, randomized controlled trials, in vitro studies, literature and systematic reviews, with or without meta-analysis, of the last 20 years that addressed the theme. Articles without abstracts, animal studies, articles in languages other than English and articles from journals unrelated to the dental field were excluded. RESULTS: after analysis according to inclusion and exclusion criteria, 28 articles were selected from a total of 54. It is known from the array of scientific articles which have assessed, either through retrospective, prospective or experimental studies, that the biomechanical and biological impact of bruxism on implant-supported prostheses is small, and that the literature has contributed little to exemplify the prosthetic limits of safety for the specialist from a clinical point of view. CONCLUSION: Although there is still no general consensus on this matter, most of the literature review articles do provide clinical guidelines that contribute to implant supported prostheses longevity and stability in patients with bruxism.

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A Systematic Review of the Potential Chemoprotective Effects of Resveratrol on Doxorubicin-Induced Cardiotoxicity: Focus on the Antioxidant, Antiapoptotic, and Anti-Inflammatory Activities

Oxidative Medicine and Cellular Longevity ◽

10.1155/2021/2951697 ◽

2021 ◽

Vol 2021 ◽

pp. 1-19

Author(s):

Li-Feng Hu ◽

Huan-Rong Lan ◽

Xue-Min Li ◽

Ke-Tao Jin

Keyword(s):

Systematic Review ◽

Combined Treatment ◽

Cardiac Cells ◽

Heart Weight ◽

Control Groups ◽

Opposite Pattern ◽

Anti Inflammatory ◽

Meta Analyses

Purpose. Although doxorubicin chemotherapeutic drug is commonly used to treat various solid and hematological tumors, its clinical use is restricted because of its adverse effects on the normal cells/tissues, especially cardiotoxicity. The use of resveratrol may mitigate the doxorubicin-induced cardiotoxic effects. For this aim, we systematically reviewed the potential chemoprotective effects of resveratrol against the doxorubicin-induced cardiotoxicity. Methods. In the current study, a systematic search was performed based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline for the identification of all relevant studies on “the role of resveratrol on doxorubicin-induced cardiotoxicity” in the electronic databases of Web of Science, PubMed, and Scopus up to March 2021 using search terms in their titles and abstracts. Two hundred and eighteen articles were screened in accordance with a predefined set of inclusion and exclusion criteria. Finally, 33 eligible articles were included in this systematic review. Results. The in vitro and in vivo findings demonstrated a decreased cell survival, increased mortality, decreased heart weight, and increased ascites in the doxorubicin-treated groups compared to the control groups. The combined treatment of resveratrol and doxorubicin showed an opposite pattern than the doxorubicin-treated groups alone. Furthermore, this chemotherapeutic agent induced the biochemical and histopathological changes on the cardiac cells/tissue; however, the results (for most of the cases) revealed that these alterations induced by doxorubicin were reversed near to normal levels (control groups) by resveratrol coadministration. Conclusion. The results of this systematic review stated that coadministration of resveratrol alleviates the doxorubicin-induced cardiotoxicity. Resveratrol exerts these chemoprotective effects through several main mechanisms of antioxidant, antiapoptosis, and anti-inflammatory.

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Natural 3D-Printed Bioinks for Skin Regeneration and Wound Healing: A Systematic Review

Polymers ◽

10.3390/polym12081782 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1782 ◽

Cited By ~ 1

Author(s):

Ali Smandri ◽

Abid Nordin ◽

Ng Min Hwei ◽

Kok-Yong Chin ◽

Izhar Abd Aziz ◽

...

Keyword(s):

Systematic Review ◽

Wound Healing ◽

Animal Studies ◽

Positive Impact ◽

Three Dimensional ◽

Skin Regeneration ◽

Future Research ◽

Eligibility Criteria

Three-dimensional bioprinting has rapidly paralleled many biomedical applications and assisted in advancing the printing of complex human organs for a better therapeutic practice. The objective of this systematic review is to highlight evidence from the existing studies and evaluate the effectiveness of using natural-based bioinks in skin regeneration and wound healing. A comprehensive search of all relevant original articles was performed based on prespecified eligibility criteria. The search was carried out using PubMed, Web of Science, Scopus, Medline Ovid, and ScienceDirect. Eighteen articles fulfilled the inclusion and exclusion criteria. The animal studies included a total of 151 animals with wound defects. A variety of natural bioinks and skin living cells were implanted in vitro to give insight into the technique through different assessments and findings. Collagen and gelatin hydrogels were most commonly used as bioinks. The follow-up period ranged between one day and six weeks. The majority of animal studies reported that full wound closure was achieved after 2–4 weeks. The results of both in vitro cell culture and in vivo animal studies showed the positive impact of natural bioinks in promoting wound healing. Future research should be focused more on direct the bioprinting of skin wound treatments on animal models to open doors for human clinical trials.

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Can Lycopene Impact the Androgen Axis in Prostate Cancer?: A Systematic Review of Cell Culture and Animal Studies

Nutrients ◽

10.3390/nu11030633 ◽

2019 ◽

Vol 11 (3) ◽

pp. 633 ◽

Cited By ~ 10

Author(s):

Catherine Applegate ◽

Joe Rowles ◽

John Erdman

Keyword(s):

Prostate Cancer ◽

Systematic Review ◽

Animal Studies ◽

Tumor Regression ◽

Meta Analysis ◽

Normal Prostate ◽

First Line Therapy ◽

Normal Prostate Tissue

First-line therapy for advanced or metastatic prostate cancer (PCa) involves the removal of tumor-promoting androgens by androgen deprivation therapy (ADT), resulting in transient tumor regression. Recurrent disease is attributed to tumor adaptation to survive, despite lower circulating androgen concentrations, making the blockage of downstream androgen signaling a chemotherapeutic goal for PCa. Dietary intake of tomato and its predominant carotenoid, lycopene, reduce the risk for PCa, and preclinical studies have shown promising results that tomato and lycopene can inhibit androgen signaling in normal prostate tissue. The goal of this systematic review was to evaluate whether mechanistic evidence exists to support the hypothesis that tomato or lycopene interact with the androgen axis in PCa. Eighteen studies (n = 5 in vivo; n = 13 in vitro) were included in the final review. A formal meta-analysis was not feasible due to variability of the data; however, the overall estimated directions of effect for the compared studies were visually represented by albatross plots. All studies demonstrated either null or, more commonly, inhibitory effects of tomato or lycopene treatment on androgen-related outcomes. Strong mechanistic evidence was unable to be ascertained, but tomato and lycopene treatment appears to down-regulate androgen metabolism and signaling in PCa.

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Antitumor Effects of Carvacrol and Thymol: A Systematic Review

Frontiers in Pharmacology ◽

10.3389/fphar.2021.702487 ◽

2021 ◽

Vol 12 ◽

Author(s):

Laeza Alves Sampaio ◽

Lícia Tairiny Santos Pina ◽

Mairim Russo Serafini ◽

Débora dos Santos Tavares ◽

Adriana Gibara Guimarães

Keyword(s):

Systematic Review ◽

Signaling Pathways ◽

Malignant Neoplasm ◽

Risk Of Bias ◽

Antitumor Effects ◽

Cycle Arrest ◽

Mesh Terms ◽

Induced Apoptosis

Background: It is estimated that one in five people worldwide faces a diagnosis of a malignant neoplasm during their lifetime. Carvacrol and its isomer, thymol, are natural compounds that act against several diseases, including cancer. Thus, this systematic review aimed to examine and synthesize the knowledge on the antitumor effects of carvacrol and thymol.Methods: A systematic literature search was carried out in the PubMed, Web of Science, Scopus and Lilacs databases in April 2020 (updated in March 2021) based on the PRISMA 2020 guidelines. The following combination of health descriptors, MeSH terms and their synonyms were used: carvacrol, thymol, antitumor, antineoplastic, anticancer, cytotoxicity, apoptosis, cell proliferation, in vitro and in vivo. To assess the risk of bias in in vivo studies, the SYRCLE Risk of Bias tool was used, and for in vitro studies, a modified version was used.Results: A total of 1,170 records were identified, with 77 meeting the established criteria. The studies were published between 2003 and 2021, with 69 being in vitro and 10 in vivo. Forty-three used carvacrol, 19 thymol, and 15 studies tested both monoterpenes. It was attested that carvacrol and thymol induced apoptosis, cytotoxicity, cell cycle arrest, antimetastatic activity, and also displayed different antiproliferative effects and inhibition of signaling pathways (MAPKs and PI3K/AKT/mTOR).Conclusions: Carvacrol and thymol exhibited antitumor and antiproliferative activity through several signaling pathways. In vitro, carvacrol appears to be more potent than thymol. However, further in vivo studies with robust methodology are required to define a standard and safe dose, determine their toxic or side effects, and clarify its exact mechanisms of action.This systematic review was registered in the PROSPERO database (CRD42020176736) and the protocol is available at https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=176736.

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