Clinical Research Directory

Effects of Irrigation Activation Methods on Periapical Healing in Chronic Apical Periodontitis

This study aims to evaluate the effects of different irrigation activation methods on periapical healing in teeth with chronic apical periodontitis. Patients underwent root canal treatment using one of three irrigation activation methods: sonic activation, passive ultrasonic irrigation, or laser-activated irrigation. Periapical healing is evaluated by comparing baseline and follow-up periapical radiographs using the Periapical Index (PAI) and fractal analysis. PAI is used to assess changes in periapical status, while fractal dimension analysis is used to quantitatively evaluate changes in the trabecular bone structure in the periapical region. The study aims to determine whether the irrigation activation method used during root canal treatment influences subsequent periapical healing.

Topical Melatonin for Immediate Implants in Chronically Infected Extraction Sockets

The purpose of this study is to evaluate the effect of topical 2% melatonin gel on implant stability and osseointegration of immediate implants placed in chronically infected extraction sockets. Sixty patients requiring extraction of non-restorable teeth associated with chronic apical lesions will be randomly assigned to receive either conventional immediate implant placement with bone graft only or immediate implant placement with adjunctive topical melatonin. Implant stability will be assessed using resonance frequency analysis over a 12-month follow-up period. Secondary outcomes will include marginal bone loss, peri-implant bone density, postoperative pain, soft tissue healing, postoperative infection, and implant survival.

Evaluation of Post-Operative Pain Following the Use of Nano-Calcium Hydroxide

The goal of this clinical trial is to evaluate the effect of different intracanal medicaments-conventional calcium hydroxide (CH) and nano-sized calcium hydroxide (NCH)-on the intensity of postoperative pain following root canal treatment in asymptomatic necrotic single-rooted teeth. The primary research question of this study is as follows: Does the use of nano-sized calcium hydroxide, compared to conventional calcium hydroxide, result in significantly reduced postoperative pain after root canal treatment? In both groups, standardized instrumentation will be performed using rotary NiTi files and 2.5% sodium hypochlorite irrigation. After cleaning and shaping, canals will be medicated with either CH or NCH, followed by temporary sealing.

Adjunctive Oral Probiotics in Endodontic Retreatment: Effects on Postoperative Pain and RANKL/OPG Levels

This study aimed to evaluate the effect of oral administration of probiotics as an adjunctive treatment to local intracanal medicaments, namely propolis and calcium hydroxide or empty canal, on the levels of receptor activator of nuclear factor kappa B ligand (RANKL) and osteoprotegerin (OPG), as well as on postoperative pain following root canal retreatment of teeth with chronic apical periodontitis

The Aim of This Study is to Evaluate the Relationship Between Genetic Polymorphisms and Periapical Lesion Healing in Individuals With Chronic Apical Periodontitis at Clinical and Radiological Levels.

Chronic apical periodontitis is a chronic inflammatory condition characterized by periapical tissue destruction and alveolar bone resorption as a result of the host response to pulpal infection, often presenting asymptomatically. The aim of this study is to comprehensively evaluate the relationship between genetic polymorphisms and periapical lesion healing in individuals with chronic apical periodontitis at clinical and radiological levels. Despite standardized root canal treatment protocols, variability in healing outcomes among individuals suggests a potential role of genetic factors in this process. This prospective observational study will include patients diagnosed with chronic apical periodontitis based on clinical and radiographic findings. All participants will undergo standardized endodontic treatment. At baseline, periapical radiography and cone-beam computed tomography (CBCT) will be performed to enable three-dimensional volumetric assessment. Follow-up evaluations will be conducted at 6 months with clinical examination and periapical radiography, and at 12 months with repeat CBCT imaging to assess volumetric changes in lesion size. All radiographic procedures will be performed in accordance with the ALARA principle, using an endodontic field of view (FOV). Prior to treatment, saliva samples will be collected for DNA isolation, and single nucleotide polymorphisms in selected cytokine gene regions will be analyzed. The primary outcome measure will be the change in periapical lesion volume over time, which will be statistically evaluated in relation to genetic profiles. This comprehensive approach is expected to enhance the understanding of healing mechanisms in apical periodontitis, improve the predictability of treatment outcomes, and contribute to the development of personalized, risk-based treatment strategies in endodontic practice.

In Vivo Study on the Material Properties of iRoot SP and nRoot SP Root Canal Sealers

A randomized controlled trial was conducted to compare the treatment efficacy of iRoot SP and nRoot SP Root Canal Sealer Materials in patients with chronic apical periodontitis.

MMP-2/3 and Periapical Healing Outcomes

This prospective randomized clinical study will investigate the association between MMP-2 and MMP-3 gene polymorphisms and radiographic healing outcomes following nonsurgical root canal treatment in patients with chronic apical periodontitis. A total of 50 patients will undergo standardized endodontic treatment and will be followed for 12 months. Genotyping will be performed using baseline DNA samples, and periapical healing will be assessed using the Periapical Index (PAI). The relationship between genetic variations and treatment outcomes will be analyzed to determine whether host-related genetic factors influence healing patterns after root canal therapy.

Effect of Different Chelation Protocols on the Healing of Periapical Lesions in Teeth With Chronic Apical Periodontitis

The aim of this study is to evaluate the effects of different irrigation protocols using ethylenediaminetetraacetic acid (EDTA) and etidronic acid (HEBP) on periapical lesion healing and postoperative pain in single-rooted, single-canal mandibular anterior and premolar teeth diagnosed with chronic apical periodontitis.

Using Platelet-rich Fibrin in Regenerative Endodontic Treatment in Mature Permanent Teeth

This study aims to evaluate the antibacterial effects of injectable platelet-rich fibrin (i-PRF) in vitro, and to assess the clinical and radiographic outcomes of using advanced platelet-rich fibrin (A-PRF+) and i-PRF in regenerative endodontic treatment of mature permanent teeth with necrotic pulp. The study will compare the effectiveness of PRF-based treatment with conventional blood clot-based regenerative endodontics.

Sonic vs Passive Ultrasonic Irrigation for Chronic Apical Periodontitis

This randomized, controlled, double-blinded clinical trial aims to directly compare the efficacy of Sonically Activated Irrigation (SAI) versus Passive Ultrasonic Irrigation (PUI) in the root canal treatment of teeth with chronic apical periodontitis, analyze potential influencing factors, and thereby identify a highly effective and safe root canal irrigation protocol. The ultimate goal is to provide an evidence-based rationale for optimizing irrigation technique selection and overall treatment strategies for chronic apical periodontitis.

Effect of Different Root Canal Sealers on Oxidative Stress Markers

The goal of this clinical trial is to primary purpose investigate and compare oxidative stress markers in patients with chronic apical periodontitis treated with different root canal paste in a single session. The main questions it aims to answer are: Is there a change in oxidative stress markers measured from saliva after root canal treatment? Is there a difference between the change of oxidative stress markers in patients using different root canal sealers after root canal treatment? Researchers will compare bioceramic-based and epoxy resin-based root canal sealers to see if there are significant differences in oxidative stress markers measured from patients' saliva after root canal treatment. * Participants will be informed about all procedures before starting the clinical process. * Participants are expected to allow saliva sampling two times: first sample will be collected on root canal treatment session and second sample will be collected on the 30th day after root canal treatment. * Participants will be informed in writing about the treatment procedure before starting the clinical process. * Participants are expected to sign the informed consent form on a voluntary basis.

Effect of Different Sealers and Activation Methods on Pain

In this study, the effects of different irrigation agitation methods and different root canal filling sealers on postoperative pain after root canal treatment will be evaluated.