Surface roughness associated with bacterial adhesion on dental resin-based materials.

This study investigates the surface quality and bacterial adhesion properties of various dental materials, including indirect composites, veneering composites, direct composites, polyether ether ketone (PEEK), and two millable polymethyl methacrylate (PMMA). Material specimens were processed following manufacturer instructions, initially evaluated for surface roughness and Streptococcus sanguinis (S. sanguinis) adhesion.

Reduction of discrepancies between students and instructors in the assessment of practical tasks through structured evaluation sheets and peer feedback.

The aim of this study was to reduce discrepancies between students and instructors in a preclinical dental course by employing structured peer feedback based on a detailed evaluation sheet. In a crossover study of dental students (n = 32), which compared peer feedback using an evaluation sheet (test) with the traditional method (control), participants completed tasks involving cavity and partial crown preparation. The practical tasks were scored numerically on a scale ranging from one (excellent) to six (failure).

Quantitative Analysis of the Acceptance and Learning Success Instead of Flipped Classroom Teaching in a Caries Diagnosis Course for Undergraduate Students.

This pilot study aimed to investigate the effectiveness of a flipped classroom for undergraduate students in dentistry. The main objective was to compare the knowledge level of students before and after lectures and practice. All second-year dental students ( = 44) at Witten/Herdecke University participated in this pilot study.

In-vitro influence of the use of an erythritol powder through air polishing on the surface roughness and abrasiveness of various restorative materials.

The aim of this in-vitro study is to compare the prophylaxis powder Airflow® Plus to a conventional prophylaxis paste with regards to surface abrasion and roughness on four different restorative materials. A total of 80 samples were fabricated, including 20 of each investigated material. Among those were a nanocomposite (Ceram X Spectra™ ST, Dentsply), a glass ionomer cement (Ketac Fill™, 3M™), a cast metal alloy (Bio Maingold SG®, Heraeus Kulzer) and a ceramic (HeraCeram® Saphir, Heraeus Kulzer).

Comparative in vitro study of the cleaning efficacy of AirFloss ultra and I-Prox Sulcus brushes in an orthodontic phantom model.

Preventing biofilm-related risks such as gingivitis and white spot lesions during orthodontic treatments is very challenging. The cleaning efficiencies of AirFloss Ultra and I-Prox P sulcus brushes were evaluated using an orthodontic phantom model. After attaching brackets onto black-coated maxillary KaVo teeth, a plaque substitute was applied.

Clinical Study on the Effectiveness of Three Products in the Treatment of Herpes Simplex Labialis.

Herpes simplex labialis (HSL) is a viral disease that affects the perioral region. No guidelines recommending an effective treatment exist. The treatment of HSL with three different products was examined.

Depth of acid penetration and enamel surface roughness associated with different methods of interproximal enamel reduction.

Objectives: To assess and compare the enamel surface quality after interproximal enamel reduction (IPR) was performed with different systems and to study the relation between acid penetration depth and enamel surface quality as well as the importance of remineralization.

Methods: Sixty-five extracted teeth were randomly allocated to five experimental groups: untreated control, manual with New Metal Strips, mechanical with oscillating segment (OS) discs, Safe-Tipped Bur Kit, and the Ortho-Strip, followed by 30 s of polishing with the Softflex system and the Compo-system after treating the tooth with OS discs. Mesial surfaces were demineralized for 24 h and distal surfaces were subjected to interchanging demineralization and remineralization cycles of 24 h each for 18 days.

Conformity, reliability and validity of digital dental models created by clinical intraoral scanning and extraoral plaster model digitization workflows.

Background: In dentistry, digitization of dental arches with intraoral scanners could one day replace impressions and plaster model digitization processes, if accuracy is clinically sufficient. This study aimed to assess the reliability, validity and conformity of an intraoral scanning procedure (Lythos, Ormco) and of two extraoral digitization workflows via alginate impression and plaster model scanning with the D810 (3shape) or the Atos II Triple Scan (GOM) under clinical conditions.

Methods: In 20 subjects three consecutive intraoral scans, three alginate and one reference polyether impression were taken of both the upper and lower dental arch, respectively.

Effectiveness of a new non-hydrogen peroxide bleaching agent after single use - a double-blind placebo-controlled short-term study.

Introduction: Tooth whitening represents perhaps the most common aesthetic procedure in dentistry worldwide. The efficacy of bleaching depends on three aspects: bleaching agent, bleaching method, and tooth color.

Objective: This in vivo study aimed to examine whitening effects on frontal teeth of the upper and lower jaws using an over-the-counter (OTC) non-hydrogen peroxide bleaching agent in comparison to a placebo after one single use.

Efficacy and acceptance of a high-velocity microdroplet device for interdental cleaning in gingivitis patients-A monitored, randomized controlled trial.

Objectives: To compare in a randomized clinical trial the efficacy of a high-velocity microdroplet device for interdental cleaning vs dental floss at reducing plaque and gingivitis.

Methods: Sixty participants with an irregular interdental home cleaning regime were randomly assigned to use either a microdroplet device (n=40, test) or dental floss (n=20, control) for 4 weeks. At baseline and reassessment, the papilla bleeding index, the modified proximal plaque index and the amount of gingival crevicular fluid (GCF) were recorded.

Toothbrush abrasivity in a long-term simulation on human dentin depends on brushing mode and bristle arrangement.

Objective: The aim of this study was to evaluate the susceptibility of dentin to brushing abrasion using four different toothbrushes (rotating-oscillating, sonic and two types of manual toothbrushes) with the same brushing forces.

Methods: Dentin samples (n = 72) were selected from 72 impacted third molars. Half of the surface of dentin samples was covered with an adhesive tape, creating a protected and a freely exposed area in the same specimen.

Pen-type laser fluorescence device versus bitewing radiographs for caries detection on approximal surfaces.

Background: The accurate detection of approximal caries is generally difficult. The aim of this study was to assess the ability of the pen-type laser fluorescence device (LF pen) to detect approximal carious lesions in comparison to bitewing radiographs (BW).

Methods: Three hundred forty-one tooth surfaces were diagnosed in 20 patients with an average age of 26.

Anterior Open Bite In 27 Months Old Children after Use of a Novel Pacifier - A Cohort Study.

Objectives: The aim of the present cohort study was to evaluate the influence of a novel pacifier on the first formation of malocclusion, the anterior open bite in children.

Study Design: 129 newborn children whose parents had decided to use pacifiers were randomly attributed to two experimental groups (D=Dentistar, n=56, Novatex, Pattensen, Germany; N=NUK, n=73, Mapa, Zeven, Germany). Children (n=42) who did not use a pacifier were not randomized and served as reference (C).

Influence of Bristle Stiffness of Manual Toothbrushes on Eroded and Sound Human Dentin--An In Vitro Study.

Aim: The aim of this study was to determine the influence of manual toothbrushes with different bristle stiffness on the abrasivity on eroded and sound human dentin.

Materials And Methods: Dentin specimens were made from impacted third molars and attributed to three groups: erosion-abrasion (EA), abrasion (A) and erosion (E). The specimens from EA and E were treated with 1% citric acid (pH 2.

Dentin abrasivity of various desensitizing toothpastes.

Background: The aim of this study was to compare the abrasivity of various commercially available toothpastes that claim to reduce dentin hypersensitivity.

Methods: Dentin discs were prepared from 70 human extracted molars. The discs were etched with lemon juice for 5 min, and one half of the discs were covered with aluminum tape.

Investigation of the oral status and microorganisms in children with phenylketonuria and type 1 diabetes.

Objective: The aim of this study was to investigate the oral parameters that influence the caries risk and risk of developing periodontal disease in children with phenylketonuria (PKU) and type 1 diabetes compared to healthy children.

Material And Methods: Two hundred and thirty-eight children between the ages of 3 and 18 years were recruited in the PKU, diabetes and healthy group. The decayed, missing and filled surfaces (dmfs/DMFS) index, papillary bleeding index (PBI) and the Silness & Löe Index were assessed.

Influence of various acidic beverages on tooth erosion. Evaluation by a new method.

Material & Methods: We have analyzed the loss of enamel and dentine after exposure to different non-alcoholic drinks with a simple new method using bovine teeth. 100 enamel and 100 dentine specimens from freshly extracted bovine incisors were randomly attributed to 10 groups (n=10 for enamel and dentine each). Prior to the start of the experiment all specimens were weighed using a precision balance.

Detection of nine microorganisms from the initial carious root lesions using a TaqMan-based real-time PCR.

Objective: The purpose of this study was to quantify nine selected cariogenic bacteria in plaque from sound root surfaces and initial carious root lesions using TaqMan PCR and to analyse a putative dependence on the kind of initial periodontal treatment.

Material And Methods: Fifty-four subjects with generalized chronic periodontitis were randomly allocated to one of the following initial periodontal therapies: full-mouth disinfection, full-mouth scaling and root planing or scaling and root planing within 7 days. Plaque samples were taken before and after periodontal treatment and analysed by TaqMan PCR.

Efficacy of a novel pacifier in the prevention of anterior open bite.

Purpose: The purpose of this study was to test a novel pacifier (Dentistar) regarding the development of anterior open bite in infants.

Methods: One hundred twenty-nine newborn children were randomly assigned to 2 experimental groups: NUK (N; N =73); and Dentistar (D; N=56. Children (N=42) who did not use a pacifier served as the control (C).

Cleaning efficacy and soft tissue trauma after use of manual toothbrushes with different bristle stiffness.

Background: The purpose of this study is to evaluate the efficacy of manual toothbrushes of the same type with different bristle stiffness concerning plaque removal, gingivitis development, and soft tissue trauma.

Methods: In a randomized controlled trial, three groups with 40 subjects each used manual toothbrushes with either hard-, medium-, or soft-bristle stiffness. The at-home brushing time was set for 2 minutes, twice a day.

Restoring strength of incisors with veneers and full ceramic crowns.

Purpose: The aim was to determine the in vitro fracture resistance of incisors restored with veneers and full ceramic crowns compared to unrestored teeth.

Materials And Methods: Seventy intact, extracted human maxillary central incisors were randomized and assigned to 7 groups (n = 10). The teeth in group 1 remained intact (control).

Comparative clinical study of the effectiveness of three different bleaching methods.

Objective: The current study assessed the efficacy of three current bleaching methods.

Methods: Seventy-five healthy subjects (45 female; 30 male) with anterior teeth, having a Vita Shade score of A2 or darker, participated in the study. The subjects were randomly assigned to one of three treatment groups: Group A: home-bleaching (illumine Home, 10% carbamide peroxide, trays, overnight, for two weeks), Group B: in-office bleaching (Illumine Office, 15% hydrogen peroxide, trays for 45 minutes, three times over three weeks), Group C: Whitestrips (strips, twice a day, 30 minutes each for two weeks).

Effect of a 5000 ppm fluoride toothpaste and a 250 ppm fluoride mouth rinse on the demineralisation of dentin surfaces.

Background: The purpose of this study was to test the null hypothesis that there is no difference between the effect of (1) a 5000 ppm fluoride toothpaste, and (2) a 250 ppm fluoride mouth rinse on demineralized human dentin surfaces, against the alternative hypothesis of a difference.

Findings: Dentin specimens were obtained from the cervical regions of 45 extracted human third molars. Half the surface of each specimen was sealed with a self-etching adhesive system and served as the reference surface.

[Caries risk assessment - are saliva tests as well as microbiological and clinical test procedures worthwhile?].

The recent representative survey has proven once more that people in Germany are affected by caries to a very different extent. Since caries can be prevented by risk-adjusted preventive programs, it would be helpful to have a possibility to determine the individual caries risk before cavities occur. Determination of a relative risk, risk screening and risk diagnosis are different levels of caries risk assessment.