Negative / Null Result ReportOpen accessDentistry
Fatemeh Maleknejad, Saied Mostafa Moazzami, Elham Baradaran Nasseri et al. · 2011 · Journal of Dental Research, Dental Clinics, Dental Prospects
Background and aims. Adhesive permeability is hindered by application of an additional layer of hydrophobic resin, which increases its concentration within the hydrophilic layer, reduces its affinity to water, and enhances its physical properties. The aim of the present study was to evaluate the effect of a hydrophobic layer on the microleakage of class V composite restorations using different adhesives. Materials and methods. The adhesives including total-etch Scotchbond MP and Single Bond, and the self-etch Clearfil SE Bond and Clearfil S3 Bond were applied to 80 class V cavities in vitro on
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Nsar Muhyaddin Aziz · 2022 · Erbil Dental Journal
Background and objectives: Gutta percha solvents like chloroform and orange oil have different effects on physio-chemical properties like the microhardness of root dentine. Aim: Effects of sesame oil on the micro hardness of root dentin after using chloroform and orange oil as guttapercha solvents. Methods: Twenty three extracted single rooted both upper and lower premolars were used crown separated from the root from the cement enamel junction ,remaining roots longitudinally sectioned from buccolingual direction each piece of roots mounted in cold cure acrylic resin and dentin surface of the
View details →Negative / Null Result ReportOpen accessDentistry
Gökay Üstdal, Ayça Üstdal Güney, Eyüp Burak Küçük · 2024 · Current Research in Dental Sciences
Objective: To evaluate the shear bond strength (SBS) and the adhesive remnant index (ARI) of different traditional orthodontic adhesive systems and newly developed pre-coated adhesive systems.Methods: A total of 50 human maxillary premolars were bonded with Clarity advanced ceramic brackets using APC™ Flash-Free, APC™ PLUS, Transbond™ XT Light Cure, Opal® Bond™MV and, Blugloo™ adhesives. All samples underwent thermo-cycling. The SBS was determined using a testometric machine. A stereomicroscope was used to evaluate the adhesive remnant on debonded enamel surface. Differences among the adhesive
View details →Negative / Null Result ReportOpen accessDentistry
AHMAD ZAAZA, Nevien Mohamed, Gaffar El Halawani · 2025 · Alexandria Dental Journal
Introduction: Osseo-integrated dental implants were traditionally load-free for up to six months while they healed. Patients usually feel dissatisfied with the long loading times. Several studies have been conducted to improve osseointegration, decrease loading time, and increase patient satisfaction.Objectives: This study aimed to evaluate and compare both clinically and radiographically the effect of hyaluronic acid (HA) versus Titanium-Platelet Rich Fibrin (T-PRF) in enhancing osseointegration around anterior maxillary dental implants. Materials and Methods: Twelve patients with extracted m
View details →Negative / Null Result ReportOpen accessDentistry
Sara Ordooei Javan, Reza Movahedian, Somayeh Hosseini Tabatabaei · 2025 · Dental Research Journal
Background: During the incremental technique of composite restorations, it is possible to be exposed to contamination of the oral environment. This study aimed to compare the effect of saliva contamination and different methods of saliva decontamination on microshear bond strength within composite surfaces. Materials and Methods: This in vitro study created 24 rectangular XT composite blocks using a silicone mold (24 mm × 10 mm × 10 mm). The blocks were divided into eight groups as follows: Group 1: Control group (without contamination); Group 2: Contaminated with saliva; Group 3: saliva + dri
View details →Negative / Null Result ReportOpen accessDentistry
Huiying Li, Huiying Li, Tong Wang et al. · 2025 · Frontiers in Dental Medicine
BackgroundReattachment of root fragments with appropriate adhesive materials is expected to be the last conservative treatment for preserving teeth with vertical root fractures (VRFs).ObjectiveThis study evaluated the biocompatibility of 4-META/MMA-TBB resin for root repair, compared with iRoot BP Plus, Fuji IX GIC, and Clearfil SA Luting. Fracture resistance and microleakage of the reattached roots were also tested.MethodsThe biocompatibility of set materials was evaluated on L929 fibroblasts. Cell Counting Kit-8 (CCK-8) assay, live/dead cells staining and flow cytometry were used to assess c
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Gustavo Vicentis De Oliveira Fernandes, Nuno Bernardo Malta Santos, Rafael Amorim Cavalcanti De Siqueira et al. · 2021 · Journal of Indian Society of Periodontology
Background: Autologous platelet concentrate (APC)/platelet-rich fibrin (PRF) of second and third generations has increased use in periodontics to optimize wound healing. Few systematic reviews (SRs) have reported improved clinical outcomes, while other studies reported significantly better results for the connective tissue graft (CTG). There is still unclear clinical evidence about APC/PRF use to treat gingival recession (GR) defects. Then, the purpose of this SR was to evaluate the use of APC/PRF membranes (2nd and 3rd generations) in root coverage (RC) procedures and assess its efficacy as a
View details →Negative / Null Result ReportOpen accessDentistry
Alireza Eshghi, Maryam Hajiahmadi, Mohammad Hossein Nikbakht et al. · 2022 · International Journal of Dentistry
Introduction. Among the new therapeutic materials, MTA and Biodentine are recommended for pulpotomy and sealing the pulp. Considering the similar characteristics of these two materials and considering that their effects on the treatment of primary second molars with irreversible pulpitis have not been compared properly, this study aimed to compare clinical and radiographic success between MTA and Biodentine in pulpotomy of primary mandibular second molars with irreversible pulpitis. Materials and Methods. This study was conducted as a randomized double-blind clinical trial. Participants were s
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Nader Abolfazli, Masoumeh Faramarzi, Fariba Salehsaber et al. · 2018 · Journal of Advanced Periodontology and Implant Dentistry
Background. Acentric double pedicle graft is an alternative to double pedicle graft, which can improve clinical outcomes by removing tension in sutures. This study examined the effect of using platelet-rich fibrin (PRF) on the success rate of acentric double pedicle graft in treating patients with Miller Class I and II recessions. Methods. A total of 16 Miller Class I and II lesions were studied in 8 patients. The samples were divided into two groups in terms of PRF use: with PRF and without PRF. Indices, including recession depth, width of keratinized gingiva and pocket depth, were measured w
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Fatemeh Ezoddini Ardakani, Vahid Sarayesh · 2008 · Journal of Dental Research, Dental Clinics, Dental Prospects
Background and aims. While the use of X-ray is increasing, professional responsibility of dentists entitles them to have sufficient and correct knowledge of using radiographs. The aim of this study was to assess the level of knowledge of correct prescription of radiographs among dentists in Yazd, Iran. Materials and methods. This was a descriptive cross-sectional study including 134 general dentists and dental specialists. A self-administered questionnaire was used to assess their level of knowledge in various sections pertaining to prescription of radiographs. Their level of knowledge was com
View details →Negative / Null Result ReportOpen accessDentistry
Özer Alkan, Burcu Oktay Çöven, Betül Özçopur et al. · 2017 · Turkish Journal of Orthodontics
Objective:The present study aimed to evaluate the effects of ozone and prophylactic antimicrobial applications on the shear bond strengths and bond failure interfaces of orthodontic brackets.Methods:Sixty human canine teeth were randomly divided into three groups (n=20), receiving the following treatments: Group I-pumice prophylaxis (Isler Dental, Ankara, Turkey)+37% orthophosphoric acid (Dentsply, Rio de Janeiro, Brazil)+Transbond XT primer and adhesive (3M Unitek, Monrovia, USA); Group II-prophylaxis paste (Topex, NJ, USA)+37% orthophosphoric acid (Dentsply, Rio de Janeiro, Brazil)+ Transbon
View details →Negative / Null Result ReportOpen accessDentistry
Merna M. Seif, Ahmed A. Abdel Hakim, Hassan M. Abouelkheir et al. · 2025 · BMC Oral Health
Abstract Background Accurate impression registration is essential for transferring the three-dimensional (3D) implant position to the definitive cast, ensuring passivity of the final prosthesis. Various impression techniques have been developed to optimize accuracy, particularly for angulated implants. This study aimed to evaluate and compare the accuracy of open-tray impression copings, clips impression copings, and hexed implant mounts in transferring implant positions for both straight and angulated implants. Methods Five implants with different angulations (three at 0°, one at 15°, and one
View details →Negative / Null Result ReportOpen accessDentistry
Anum Tanwir, Shahbaz Ahmed, Hira Akhtar et al. · 2022 · European Endodontic Journal
Objective: The objective of this study was to compare the effectiveness of premedication drugs including single dose Piroxicam and Prednisolone in regard to post endodontic pain at different time intervals (24, 48, 72 and 96 hours) after single visit root canal treatment. Methods: This randomized clinical trial (registration no. NCT04124822) was performed in operative dentistry department of a private clinical institute. One hundred twenty patients identified with symptomatic irreversible pulpitis were included in the study. The pain intensity levels were marked through the use of visual analo
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Dragos Epistatu, Octavian-Marius Dinca, Cristian Vladan et al. · 2023 · Dentistry Journal
The aim of this study is to evaluate the long-term changes of sinus lift material. Materials and methods: We included a total number of 35 patients (20 men and 15 women), between 32 and 80 years old, evaluated on a timeframe of up to 11.6 years. Diverse biomaterials were used (allograft, xenograft, alloplastic, combinations of them), with autologous bone in some cases. Results: The appearance of the top plane of the bone over time took a large dome shape (36% of cases), a linear shape (32% of cases), an irregular shape (23% of cases), or had micro domes above the implants (7%). No significant
View details →Negative / Null Result ReportOpen accessDentistry
Sonam Mufti, Sarvagna Mayank Dadawala, Phoram Patel et al. · 2017 · Contemporary Clinical Dentistry
Background: One of the most common aesthetic problem encountered in the field of periodontology is gingival recession, which is, perceived by the patients as increase in length of teeth. The treatment of buccal gingival recession is a common requirement due to aesthetic concern or root sensitivity. This study was planned to evaluate the efficacy of PRF membrane compared to that of CTG in Miller's class I gingival recessions. Materials and Methods: 32 sites with Miller's Class I gingival recessions, out of which 16 sites received PRF (test) and 16 sites received CTG (control). Each patient had
View details →Negative / Null Result ReportOpen accessDentistry
Khudhair A Al- Salman, Baydaa A Al-Rawi, Omar S Rahawi · 2012 · Al-Rafidain Dental Journal
Aims: To evaluate the effect of two types of disinfectant solutions(2% alkaline glutaraldehyde, 1% sodium hypochlorite) in wettability of three types of elastomeric impression materials (light body) which are used in crown and bridge restorations at different times of immersion. Materials and me-thods: Three types of elastomeric impression materials (light body) were formed on a flat acrylic resin block and allowed to set(five specimens of each impression material was done for each immersion time(15,30 and60 minutes)of each disinfectant solution in addition to control groups). The wettability
View details →Negative / Null Result ReportOpen accessDentistry
Eman Al Mheiri, Jahanzeb Chaudhry, Salma Abdo et al. · 2020 · BMC Oral Health
Abstract Background The aim of this study was to analyze the root and canal morphology of the maxillary permanent first molars in an Emirati population using cone-beam computed tomography (CBCT). Methods Two hundred and sixty-one CBCT scans were acquired. The data were extracted and anonymized to remove all patient identifiers. Two observers (an endodontic resident and an endodontist) evaluated all scans on diagnostic quality monitors. Results The prevalence of a second mesiobuccal canal (MB2) was 80.1% in all examined samples. Type II Vertucci classification, was the most common canal configu
View details →Negative / Null Result ReportOpen accessDentistry
Zahra Hashemi Ardakani, Rashin Giti, Shima Dabiri et al. · 2021 · Dental Research Journal
Background: The flexural strength (FS) of a denture base material is of great concern, and many approaches have been used to strengthen the denture acrylic resins. The present study aimed to evaluate the effect of high-performance polymer (BioHPP) and metal mesh reinforcement on the FS of a heat-cured poly methyl methacrylate (PMMA) acrylic resin. Materials and Methods: This experimental study was done on 30 rectangular specimens (64 mm × 13 mm × 3 mm) of a heat-cured PMMA resin. The specimens were divided into three groups (n = 10) to be reinforced with either metal mesh or BioHPP mesh; one g
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Zahra Bahrololoomi, Farnaz Farahat, Shirin Pajouhande et al. · 2025 · Journal of Dental Materials and Techniques
Objective: Coronal restoration of pulpotomized primary molars plays a vital role in ensuring the long-term success of the treatment. This study aimed to evaluate the effect of fiber reinforcement on the fracture resistance of pulpotomized primary molars restored with flowable or paste bulk-fill composite resins in comparison to a conventional composite resin.Methods: In this in vitro experimental study, 48 primary molars were randomly allocated into six groups (n=8). The teeth were pulpotomozed and restored with the following materials: Group 1: Conventional composite resin, Group 2: Fiber+ co
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Naser Sargolzaie, Vahid Reza Askari, Maryam Najjar et al. · 2024 · Journal of Dental School
Objectives This study aimed to investigate the effect of propolis-based mouthwash on the gingival parameters of generalized chronic gingivitis cases in a randomized controlled clinical trial. Methods A total number of 69 patients with generalized chronic gingivitis were randomly assigned into three groups (N=23): propolis, chlorhexidine, or placebo mouthwash. The gingival and bleeding indices were evaluated before and after two weeks of mouthwash use. Data analyses were performed using Kruskal-Wallis test, one-way analysis of variance, and paired t-test at p<0 .05. Results The average gingival
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S.Shojaeddin Shayegh, Parviz Amini, Kaveh Yaghmai et al. · 2016 · Journal of Islamic Dental Association of Iran
Background and Aim: Several methods are available for intraoral repair of chipped porcelain restorations by composite resin. Also, there is still controversy regarding the best method of porcelain repair in terms of bond strength and cost effectiveness. This study aimed to compare three methods of porcelain surface treatment on shear bond strength (SBS) of composite to porcelain. Materials and Methods: This in vitro, experimental study was conducted on 30 porcelain blocks with a metal base in three groups. In group 1, porcelain surface was etched with hydrofluoric (HF) acid and silanized. Afte
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Elanur Yıldızoğlu, Melih Manir, Muhammet Karadas · 2026 · BMC Oral Health
Abstract Background This in-vitro study aimed to assess the effects of whitening toothpastes on color and translucency changes and surface roughness of resin composites. Methods Disk-shaped resin composite samples from each composite (Clearfil Majesty Esthetic, Palfique Estelite Paste, and Charisma Smart) were made and randomly allocated into five groups (n = 10): Crest Pro Health Whitening, Advance White Pro, Sensodyne Extra Whitening, a control group (distilled water), and a positive control group (exposed to only stain). The samples were exposed to a tea solution and brushed for 30 days. Su
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Ravi Bhujbal, Neelima A Malik, Nilesh Kumar et al. · 2018 · Journal of Dental Research, Dental Clinics, Dental Prospects
Background. Surgical removal of mandibular third molars results in pain, swelling and bony defects, causing prolonged postoperative recovery. The growth factors present in platelet-rich plasma (PRP) can accelerate the healing, thereby shortening postoperative recovery period. This study was undertaken to evaluate the role of PRP in postoperative socket healing, pain, swelling and bone regeneration following surgical removal of impacted mandibular third molars. Methods. The present case‒control study was conducted on 20 patients with identical bilateral mandibular third molar impaction. PRP was
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Ika Devi, Erliera Sufarnap, Finna et al. · 2023 · Dental Journal
Background: Chitosan has an antimicrobial effect in oral hygiene control. Orthodontists sometimes prescribe mouthwash to adolescent patients. Copper-nickel-titanium (CuNiTi) orthodontic archwire is widely used in orthodontic treatment. Chitosan’s effects on the CuNiTi properties of orthodontic archwire are not generally known. Purpose: This study aimed to measure the acidity, copper ion release, deflection, and surface roughness of CuNiTi orthodontic archwire immersed in artificial saliva and 2% chitosan. Methods: This study comprised experimental laboratory research. Forty-two CuNiTi orthodon
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Utku Böcüoğlu, Esra Ateş Yıldırım, Selma Erdoğan Düzcü et al. · 2026 · BMC Oral Health
Abstract Objectives This in vitro study aimed to evaluate the effect of laser photobiomodulation on the structural integrity and degradation resistance of two types of platelet-rich fibrin membranes: Leukocyte- and Platelet-Rich Fibrin (L-PRF) and Titanium-Prepared Platelet-Rich Fibrin (T-PRF). Structural changes in the fibrin network were assessed using Scanning Electron Microscopy (SEM) and light microscopy. Materials and methods Our study was performed on 15 systemically healthy individuals and four L-PRF and four T-PRF membranes obtained from each individual, totaling 120 samples. L-PRF wa
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Muhammad Zubair Ahmad · 2024 · International Journal of Dentistry
Objectives. Rotary single-file endodontic systems are commonly used for root canal treatment. However, very few studies have evaluated the apical extrusion of debris generated by these systems during canal preparation at normal body temperature in laboratory conditions. The aim of this study was to evaluate the amount of apically extruded debris caused by seven different single-file endodontic instrumentation systems at body temperature in mandibular molar teeth with curved root canals. Methods. One hundred forty mandibular first permanent molars were randomly divided into seven groups (n = 20
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Sara Jafarimofrad, Hamid Sarlak, Shima Nourmohammadi · 2022 · Dental Research Journal
Background: Control of pain, fear, and anxiety of pediatric dental patients is a common concern for the parents and dental clinicians. This study aimed to compare the efficacy of audiovisual distraction (AVD) and mute-video distraction (MVD) for reduction of pain and anxiety of pediatric dental patients. Materials and Methods: This randomized split-mouth crossover clinical trial evaluated 60 systemically healthy children between 4 and 7 years requiring bilateral pulpotomy of primary maxillary first molars. The samples were randomly divided into 6 groups based on the distraction technique and s
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Azam Valian, Zahra Jaber Ansari, Mohammad Moien Rezaie et al. · 2021 · BMC Oral Health
Abstract Background Esthetic dental restorations have gained increasing popularity. The surface of restorations should be smooth enough to achieve maximum esthetics and prevent the adhesion of microorganisms and food particles. This study aimed to assess the surface roughness and color change of composite specimens following airflow usage. Methods In this in vitro, experimental study, 30 Tokuyama composite discs were fabricated and randomly divided into three groups (n = 10) for the use of airflow with calcium carbonate/bicarbonate powder and conventional polishing with FlexiDisc. The surface
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Mohamed Abo-El-Saad, Sherif Ayad, Lydia Melek et al. · 2023 · Alexandria Dental Journal
Background: After extracting teeth, both remarkable resorption in the alveolar bone and an obvious reduction have occurred in the labial bone plate as a consequence of the blood supply deficiency that happens especially when the periodontal ligaments are lost. Therefore, to keep the periodontal ligaments preserved, a socket shield technique with autogenous dentine was introduced.Aim of this study: Radiographic evaluation of a combined technique using autogenous dentin graft with socket shield for pre-implant socket preservationPatient and method: Eight patients received socket preservation usi
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Daiana Kelly Lopes HERNANDES, Cesar Augusto Galvão ARRAIS, Erick de LIMA et al. · Journal of Applied Oral Science
ABSTRACT Objective This in vitro study evaluated the effect of two different shades of resin cement (RC- A1 and A3) layer on color change, translucency parameter (TP), and chroma of low (LT) and high (HT) translucent reinforced lithium disilicate ceramic laminates. Material and Methods One dual-cured RC (Variolink II, A1- and A3-shade, Ivoclar Vivadent) was applied to 1-mm thick ceramic discs to create thin RC films (100 µm thick) under the ceramics. The RC was exposed to light from a LED curing unit. Color change (ΔE) of ceramic discs was measured according to CIEL*a*b* system with a standard
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