Failure-mode index

Negative results in Dentistry

102 indexed negative results, null findings, and replication failures in Dentistry. Each entry is a real published study whose primary finding was negative — learn what already failed before you repeat it.

Browse all 102 in Dentistry Search the whole index

By typeNegative / Null Result Report 101 Failed Experiment Report 1

Most-cited failures in Dentistry

Negative / Null Result Report2017

Accuracy of four intraoral scanners in oral implantology: a comparative in vitro study

BMC Oral Health

Negative / Null Result Report2013

Bioactivity evaluation of three calcium silicate‐based endodontic materials

International Endodontic Journal

Negative / Null Result Report2012

Incidence of impacted mandibular and maxillary third molars-a radiographic study in a Southeast Iran population

Medicina oral, patología oral y cirugía bucal

Negative / Null Result Report2013

Anti‐infective therapy of peri‐implantitis with adjunctive local drug delivery or photodynamic therapy: 12‐month outcomes of a randomized controlled clinical trial

Clinical Oral Implants Research

Negative / Null Result Report2013

Exploring the genetic basis of chronic periodontitis: a genome-wide association study

Human Molecular Genetics

Negative / Null Result Report2016

In Vitro Biofilm Formation on Titanium and Zirconia Implant Surfaces

Journal of Periodontology

Negative / Null Result Report2012

Anti‐infective therapy of peri‐implantitis with adjunctive local drug delivery or photodynamic therapy: six‐month outcomes of a prospective randomized clinical trial

Clinical Oral Implants Research

Negative / Null Result Report2020

Deep Learning for Automated Detection of Cyst and Tumors of the Jaw in Panoramic Radiographs

Journal of Clinical Medicine

Negative / Null Result Report2010

Smoking, Diabetes Mellitus, Periodontitis, and Supportive Periodontal Treatment as Factors Associated With Dental Implant Survival: A Long-Term Retrospective Evaluation of Patients Followed for Up to 10 Years

Implant Dentistry

Negative / Null Result Report2010

Subgingival Plaque Removal Using a New Air‐Polishing Device

Journal of Periodontology

Negative / Null Result Report2013

Evaluation of Antioxidant Enzymes Activity and Malondialdehyde Levels in Patients With Chronic Periodontitis and Diabetes Mellitus

Journal of Periodontology

Negative / Null Result Report2015

Peri‐implant evaluation of immediately loaded implants placed in esthetic zone in patients with diabetes mellitus type 2: a two‐year study

Clinical Oral Implants Research

Negative / Null Result Report2015

Enamel Bond Strength of New Universal Adhesive Bonding Agents

Operative Dentistry

Negative / Null Result Report2011

Effect of Non‐Surgical Periodontal Therapy on C‐Reactive Protein, Oxidative Stress, and Matrix Metalloproteinase (MMP)‐9 and MMP‐2 Levels in Patients With Type 2 Diabetes: A Randomized Controlled Study

Journal of Periodontology

Negative / Null Result Report2018

Efficacy of autogenous tooth roots for lateral alveolar ridge augmentation and staged implant placement. A prospective controlled clinical study

Journal Of Clinical Periodontology

Negative / Null Result Report2017

Orthognathic Surgery Has a Significant Effect on Perceived Personality Traits and Emotional Expressions

Plastic & Reconstructive Surgery

Negative / Null Result Report2020

Assessment of the Stability of the Palatal Rugae in a 3D-3D Superimposition Technique Following Slow Maxillary Expansion (SME)

Scientific Reports

Negative / Null Result Report2022

Effect of distance learning on the quality of life, anxiety and stress levels of dental students during the COVID-19 pandemic

BMC Medical Education

Negative / Null Result Report2014

Significant association of Interleukin-10 genotypes and oral cancer susceptibility in Taiwan.

PubMed

Negative / Null Result Report2017

Spatial and contrast resolution of ultralow dose dentomaxillofacial CT imaging using iterative reconstruction technology

Dentomaxillofacial Radiology

Negative / Null Result Report2017

Toothpastes containing abrasive and chemical whitening agents: efficacy in reducing extrinsic dental staining.

PubMed

Negative / Null Result Report2016

Antiseptics and microcosm biofilm formation on titanium surfaces

Brazilian Oral Research

Negative / Null Result Report2022

Smear layer deproteinization with NaOCl and HOCl: Do application/wash-out times affect dentin bonding of one-step self-etch adhesives?

Dental Materials Journal

Negative / Null Result Report2019

Remineralization of Artificial Dentin Caries Using Dentin and Enamel Matrix Proteins

Materials

Negative / Null Result Report2026

BLOOD LIPID LEVELS RELATED TO ALLERGIC RHINITIS: A SIGNIFICANT ASSOCIATION?

EuroMediterranean Biomedical Journal

Negative / Null Result Report2025

Unraveling the oral microbiome's role in Alzheimer's disease: From pathophysiology to therapeutic potential

Alzheimer s & Dementia

Negative / Null Result Report2026

Stimuli-responsive, antimicrobial-loaded nanocarriers for oral biofilm control and microbiome restoration

International Journal of Oral Science

Negative / Null Result Report2026

Adjunctive Therapies in Periodontitis: Current Concepts and the Future

Journal of Periodontal Research

Negative / Null Result Report2016

Comparison of the Effect of Three methods of Porcelain Surface Treatment on Shear Bond Strength of Composite to Porcelain

Journal of Islamic Dental Association of Iran

Negative / Null Result Report2024

Efficacy of Propolis-Based Mouthwash on Generalized Chronic Gingivitis: A Randomized Controlled Clinical Trial

Journal of Dental School

Negative / Null Result Report2025

Fracture resistance of pulpotomized primary molars restored with three types of composite resins with and without fiber-reinforcement

Journal of Dental Materials and Techniques

Negative / Null Result Report2021

Flexural strength of polymethyl methacrylate reinforced with high-performance polymer and metal mesh

Dental Research Journal

Negative / Null Result Report2021

Effects of a novel dye containing toothpaste versus regular fluoridated toothpaste for supragingival biofilm reduction in patients with chronic gingivitis: A Randomized Controlled Trial

Dentistry 3000

Negative / Null Result Report

Bacterial endotoxin adhesion to different types of orthodontic adhesives

Journal of Applied Oral Science

Negative / Null Result Report2023

The potential of rambutan honey toothpaste in reducing the dental plaque index: a quasi Experimental study

Padjadjaran Journal of Dentistry

Negative / Null Result Report2020

Evaluation of root and canal morphology of maxillary permanent first molars in an Emirati population; a cone-beam computed tomography study

BMC Oral Health

Negative / Null Result Report2016

Effect of time in hardness test on artificially demineralized human dental enamel

Brazilian Journal of Oral Sciences

Negative / Null Result Report2021

Antifungal Efficacy of a Permanent Silicon Soft Liner Containing Silver Nanoparticles

Frontiers in Dentistry

Negative / Null Result Report2018

Comparison of the occlusal contact area of virtual models and actual models: a comparative in vitro study on Class I and Class II malocclusion models

BMC Oral Health

Negative / Null Result Report2025

Effect of laser etching on shear bond strength between polyether ether ketone (PEEK) and maxillofacial silicone after accelerated ageing – an in vitro study

Biomaterial Investigations in Dentistry

Negative / Null Result Report2023

Tooth-Implant-Supported Prosthetic Structures Versus Implant-Supported Restorations

Acta Stomatologica Croatica

Negative / Null Result Report2007

An In Vitro Comparison of Microleakage of White Pro Root MTA and Root MTA in Retro Grade Cavity

مجله دانشکده دندانپزشکی اصفهان

Negative / Null Result Report

Influence of resin cement shade on the color and translucency of ceramic veneers

Journal of Applied Oral Science

Negative / Null Result Report2023

COMPARISON OF SOCKET PRESERVATION USING SOCKET SHIELD TECHNIQUE WITH AUTOGENOUS DENTIN GRAFT VERSUS ALLOPLAST GRAFT MATERIAL (CLINICAL STUDY)

Alexandria Dental Journal

Negative / Null Result Report2021

Composite surface roughness and color change following airflow usage

BMC Oral Health

Negative / Null Result Report2008

Demographic variations in the coping ability of people living with HIV/AIDS in Nigeria: implications for counseling

Nigerian Dental Journal

Negative / Null Result Report2022

Is audio a mandatory component of multimedia distraction for reduction of pain and anxiety of pediatric dental patients? A split-mouth crossover randomized controlled clinical trial

Dental Research Journal

Negative / Null Result Report2024

Assessment of Debris Extrusion in Curved Canals: An In Vitro Analysis of Various Single-File Endodontic Instrumentation Systems

International Journal of Dentistry

Negative / Null Result Report2026

In vitro investigation of the effect of laser on platelet-rich fibrins

BMC Oral Health

Negative / Null Result Report2023

Chitosan’s effects on the acidity, copper ion release, deflection, and surface roughness of copper-nickel-titanium archwire

Dental Journal