scholarly journals Auxiliary Reflectance Sensor for Guided Surgery with Dental Implants: In Vitro Study

2020 ◽  
Vol 14 (01) ◽  
pp. 115-122
Author(s):  
Diego Antonio Sigcho López ◽  
Karina Pintaudi Amorim ◽  
Dalva Cruz Laganá
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Apical Position ◽  
Virtual Planning ◽  
Guided Surgery ◽  
Group 2 ◽  
Cervical Level ◽  
Group 1

Abstract Objectives The aim of this research was to develop a sensor of approximation by reflectance for guided surgery with dental implants without flap detachment, and verify the effectiveness of this system. Materials and Methods Ten models of total edentulous arches were divided into two groups. Two implants of 3.5 × 11.5 mm (NeoDent) were inserted in each model; in Group 1 (G1), a stereolithographic guide NeoGuide system was used. In Group 2 (G2), the experimental approximation sensor was used for the insertion of the implants. The evaluation of the results was performed by overlapping the virtual planning images with the tomographies of the models of the implants inserted. Results There were no statistically significant differences between the guide and the sensor groups. The averages and standard deviations observed at the angulation of the guide was 4.15 (2.65 degrees) and 5.48 (2.85 degrees) at the sensor. The linear deviations at the cervical level were 0.002 (1.37) and 0.11 (1.47) mm and at the apical level 0.19 (1.28) and 0.21 (1.42) mm, respectively. Conclusions The use of a guide is important for the stabilization of the drills; the greatest challenge is to control the apical position of the implants, especially in highly reabsorbed edges. The experimental sensor can become an auxiliary tool to the stereolithographic guides; however, several difficulties must still be overcome to recommend the use of a sensor.

Correlation of Fracture Resistance of Dental Implants and Bite Force in Dogs described in the literature: An In Vitro Study

2021 ◽  
pp. 089875642110449
Author(s):  
Jaime Sarda Aramburú ◽  
Sergio Alexandre Gehrke ◽  
Berenice Anina Dedavid ◽  
Tiago Luis Eilers Treichel ◽  
Ney Luis Pippi
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Static Fatigue ◽  
Machine Model ◽  
Group 3 ◽  
Group 2 ◽  
External Forces ◽  
Group 1

Dental implants are not routinely used for rehabilitation in veterinary dentistry. For some veterinarians, further studies are necessary to be considered for clinical use in animals. The objective of the present in vitro study was to evaluate static fatigue of dental implants and to correlate that with the bite strength of dogs described in the literature. Sixty implants and abutments were used with the smallest diameter of each brand of implant utilized in the study. Three groups ( n  =  20) were created on the basis of the implant diameter, all with external hex connector: 3.30 mm (group 1), 4.0 mm (group 2) and 5.0 mm (group 3). All groups were subjected to quasi-static loading at 30° to the implant's long axis in a universal machine (model AME-5 kN). The mean fracture strength for group 1 was 964 ± 187 N, for group 2 was 1618 ± 149 N and for group 3 was 2595 ± 161 N. Significant differences between the groups with respect to resistance after the load applications were observed ( P < .05). The diameter of implants affects the resistance to external forces during the application of non-axial strength (off-axis loading) and must be considered during the planning of rehabilitation to avoid problems.

Implants With Internal Hexagon and Conical Implant-Abutment Connections: An In Vitro Study of the Bacterial Contamination

2014 ◽  
Vol 40 (1) ◽  
pp. 30-34 ◽  
Author(s):  
Simonetta D'Ercole ◽  
Antonio Scarano ◽  
Vittoria Perrotti ◽  
Jorge Mulatinho ◽  
Adriano Piattelli ◽  
...  
Keyword(s):  
Bacterial Contamination ◽  
In Vitro Study ◽  
Vitro Study ◽  
Bacterial Suspension ◽  
Inflammatory Reactions ◽  
Implant Abutment ◽  
Group 2 ◽  
Group 1 ◽  
Internal Connections

Prevention of microbial leakage at the implant-abutment junction is a major challenge for the construction of 2-stage implants in order to minimize inflammatory reactions and to maximize bone stability at the implant neck. The aim of the present in vitro study was an evaluation of the leakage observed over a period of 28 days in Cone Morse taper internal connections and in screwed-abutments connections. In the present study 10 specimens of Cone Morse (Group 1) and 10 of internal hexagon (Group 2) implants were used. The inner parts of 5 implants per group were inoculated with Pseudomonas aeruginosa (PS) suspension and 5 implants per group with Aggregatibacter actinomycetemcomitans (AA). The possible penetration of bacterial suspension into the surrounding solution was determined by the observation of turbidity of the broth. In Group 1, bacterial contamination was found in 3 out of 5 implant-abutment assemblies seeded with the PS and in 2 samples out of 5 in the assemblies seeded with AA, with a total of leaked assemblies in this group of 5 out of 10. In Group 2, bacterial contamination was found in 4 out of 5 implant-abutment assemblies seeded with the PS, and in 4 out of 5 samples seeded with AA, with a total of leaked assemblies of 8 out of 10. The present data confirm the reported high permeability to bacterial leakage of screw-retained abutment connections, and the lower infiltration rates—although not significantly—of Cone Morse taper internal connections.

scholarly journals Evaluation of sealing between abutment and inner connection of cone morse dental implant

2018 ◽  
Author(s):  
Derivaldo Moura Gois Filho ◽  
Vanessa Tavares de Gois-Santos ◽  
Ronaldo Santos Silva ◽  
Antônio Carlos Marqueti ◽  
Arthur Rodriguez Gonzalez Cortes ◽  
...  
Keyword(s):  
Dental Implants ◽  
Treatment Success ◽  
In Vitro Study ◽  
Study Results ◽  
Significant Difference ◽  
Group 2 ◽  
Dental Abutments ◽  
Scanning Electron ◽  
Group 1

Introduction: The adaptation of prostheses fixed over implants involves biomechanical aspects that are directly associated with treatment success. Objective: The aim of this in vitro study was to evaluate the presence of microgaps in the abutment/inner connection interface of cone morse dental implants. Materials and methods: Two groups of implants were analyzed. The first group (n = 16) employed single-manufacturer dental implants and abutments, whereas the second group (n = 16) combined multi-manufacturer materials. The sets were analyzed through scanning electron mi­croscopy, wherein microgaps between the implant connection and the abutment were observed. Results: Group 1 had an average microgap of 5.69 μm (SD ± 8.46 μm). Group 2 had an average microgap of 1.24 μm (SD ± 0.44 μm). A significant difference was found between the two groups (p = 0.002). Conclusion: Within the limitations of this study, results suggest that the group formed by multi-manufacturer implants and abutments (group 2) had smaller microgap values, and, therefore, a higher in vitro adaptation of components. DESCRIPTORS | Dental Implants; Dental Abutments; Scanning Electron Microscopy.

MICROLEAKAGE OF CLASS II RESTORATION WITH COMPOSITE INLAY: AN IN VITRO STUDY

2016 ◽  
pp. 28-32
Author(s):  
Xuan Anh Ngoc Ho ◽  
Thien Man Tran
Keyword(s):  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Class Ii ◽  
Vitro Study ◽  
Significant Difference ◽  
Indirect Composite ◽  
Group 2 ◽  
Composite Inlay ◽  
Group 1

Background: Overcoming the obstacles of Class II restoration, especially the microleakage, is a polemic issue. The present study was performed to evaluate the microleakage of Class II restorations using three different techniques. Aims: The aim of this in vitro study was to evaluate the microleakage of Class II restorations using three different techniques. Materials and methods: The study was carried out in the laboratory with paired comparision between groups. Thirty Class II cavities were prepared on extracted non-carious human permanent molars, randomly divided into 3 groups, which were then restored with 3 different methods. Group 1: indirect composite inlay (Tetric N-Ceram) cemented with resin-modified glass ionomer cement (Fuji Plus); Group 2 indirect composite inlay (Tetric N-Ceram) cemented flowable composite (Tetric N-flow); Group 3: direct composite restoration using Tetric N-Ceram. Before immersed to 2% methylene blue solution for 12 hours, all restorations were subjected to thermal cycling (100 cycles 50C – 55 0C). The extent of dye penetration along the gingival wall was assessed using a grade scale from 0 to 3 under 40 times magnification using digital camera Nikon D7000. Results: All types of restorations showed some rate of microleakage. In comparing the three techniques, group 1 demonstrated the significantly higher rate of leakage compared to the others (p<0.05), whereas group 2 and 3 showed no significant difference. Conclusion: Different luting materials have different influences on the microleakage degree along gingival wall of Class II restoration. Key word: composite inlay, class II restoration, microleakage

scholarly journals Comparative Evaluation of Self-etching Primers and Phosphoric Acid Effectiveness on Composite to Enamel Bond: An in vitro Study

2013 ◽  
Vol 14 (5) ◽  
pp. 790-795 ◽  
Author(s):  
G Vinay Kumar ◽  
Basanagouda S Patil ◽  
BK Raghavendra Rao ◽  
SM Sharathchandra ◽  
Reshma Hegde
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
One Step ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

ABSTRACT Aim The aim of the present study was to investigate the effectiveness of the one total-etch self-priming adhesive, one two-step self-etching primer adhesive, and one ‘all-in-one’ selfetching adhesive system on the adhesion of a resin composite to enamel. Materials and methods Thirty-six freshly extracted human mandibular molars were selected for this study. A flat area about 5 mm in diameter was created on the exposed mesial surface of enamel of each tooth by moist grinding with 320, 420 and 600 grit silicon carbide paper. Twelve teeth were randomly assigned into three groups. In group 1, Adper Easy One (3M ESPE), a one step self-etching primer adhesive was applied and light curing unit for 10 seconds. In group 2, Adper SE Plus, a twostep self-etching primer with bottle A containing the aqueous primer and bottle B containing the acidic adhesive was applied and light cured for 10 seconds. Group 3 (control)—etchant 37% phosphoric acid is applied to the surface for 15 seconds and rinsed with water and air dried and adhesive (single bond 2) is applied to the surface and tube is placed and light cured for 20 seconds. Composite material (Z350) was placed in the tube and light cured for 40 seconds in all the groups. Bond strength testing was done using universal testing machine at the enamel-composite interface. The debonded enamel surface was evaluated in stereomicroscope to assess the cohesive, adhesive or mixed fracture. Data was statistically analyzed by one way analysis of variance (ANOVA). Results Group 1 performed least among all groups with a mean score of 19.46 MPa. Group 2 had a mean score of 25.67 MPa. Group 3 had a mean score of 27.16 MPa. Conclusion Under the conditions of this in vitro study, the bond strength values of the two-step self-etching primer systems tested were similar to the total-etch. And, one step self-etching primers have lower bond strength compared to the total-etch. How to cite this article Patil BS, Rao BKR, Sharathchandra SM, Hegde R, Kumar GV. Comparative Evaluation of Selfetching Primers and Phosphoric Acid Effectiveness on Composite to Enamel Bond: An in vitro Study. J Contemp Dent Pract 2013;14(5):790-795.

Internal Bone Temperature Change During Guided Surgery Preparations for Dental Implants: An In Vitro Study

2013 ◽  
Vol 28 (6) ◽  
pp. 1464-1469 ◽  
Author(s):  
Marco Migliorati ◽  
Leonardo Amorfini ◽  
Alessio Signori ◽  
Fabrizio Barberis ◽  
Armando Silvestrini Biavati ◽  
...  
Keyword(s):  
Dental Implants ◽  
Temperature Change ◽  
In Vitro Study ◽  
Vitro Study ◽  
Guided Surgery

scholarly journals Comparative Evaluation of Cleaning Efficacy of Three Different Single File Systems: An In Vitro Study

2021 ◽  
pp. 26-31
Author(s):  
Deebah Choudhary
Keyword(s):  
File Systems ◽  
In Vitro Study ◽  
Single File ◽  
Working Length ◽  
Group 3 ◽  
Group 2 ◽  
Cleaning Efficacy ◽  
Scanning Electron ◽  
Group 1

Aim: The aim of this study was to evaluate the canal cleaning efficacy of these three file systems using scanning electron microscopy. Place and Duration of Study: The study was conducted in the Department of Conservative dentistry and Endodontics, Institute of Dental Sciences Sehora, between October 2020 and December 2020. Materials and Methods: Access cavity preparation was performed on sixty extracted human mandibular premolar teeth and working length was determined. The samples were randomly divided into three groups (n=20) depending upon the file system used i.e. Group 1 (Reciproc Blue), Group 2 (Waveone Gold) and Group 3 (F360). Samples were split into two halves by creating longitudinal grooves on the buccal and lingual surfaces. The samples were sputter-coated with gold and examined under scanning electron microscope at 5000X. The dentinal wall of root canal at coronal, middle and apical thirds of each sample were evaluated for the presence of determining the canal cleanliness and then analyzed using a five-score index. Results: The results of this study revealed that Group 1 (Reciproc Blue) exhibited better cleaning efficacy than samples of Group 2 (WaveOne Gold) and Group 3 (F360) at different locations in the canal i.e. coronal, middle and apical. The mean debris present was highest in coronal area for both group 2 and group 3 i.e. 2.1 and least was seen in apical area of group 1 i.e. 0.3. (p<0.05) Conclusion: Reciproc Blue single-file showed highest cleaning efficacy followed by Waveone Gold and F360. Reciproc file also showed effective cleaning in the apical third of the canal.

scholarly journals Comparative Evaluation of Dimensional Accuracy, Surface Characteristics, and Load Deflection Attributes of 0.019" × 0.025" Stainless Steel Wires Sourced from Six Different Commercial Houses: An In Vitro Study

2020 ◽  
Vol 54 (4) ◽  
pp. 311-320
Author(s):  
Neeraj E Kolge ◽  
Vivek J Patni ◽  
Girish Karandikar ◽  
Ravindranath VK ◽  
Prateek Daga ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Frictional Resistance ◽  
Dimensional Accuracy ◽  
Surface Characteristics ◽  
Steel Wires ◽  
Group 5 ◽  
Group 2 ◽  
Deflection Rate ◽  
Group 1

Aims & Objectives: The aim of the study was to evaluate and compare dimensional accuracy, surface characteristics and load deflection attributes of SS wires sourced from six different commercial houses. Materials & Methods: 0.019” x 0.025” SS wire samples were divided into 6 groups and evaluated and compared for the aforementioned properties. Dimensional accuracy, surface roughness, frictional resistance, load deflection rate and ultimate tensile strength were evaluated and compared. Results: Dimensional accuracy did not vary significantly. Surface Profilometry proved 3M Unitek (Group 1) to be the wire with least irregularities. According to SEM, Modern Orthodontics (Group 6) and 3M Unitek (Group 1) in terms of ‘Sa’ and ‘Sq’ respectively had the smoothest surface finish. SS wires sourced from G&H Orthodontics (Group 2) exhibited least frictional resistance. Load deflection rates varied for all the groups for all three parameters under the study. UTS was best for SS wires sourced from Rabbit Force Orthodontics (Group 5). Conclusion: No wire from a single commercial house excels in all the parameters that were evaluated, each one having its aces and minuses.

Cemented Single Crown Retention on Dental Implants: An In Vitro Study

2017 ◽  
Vol 30 (2) ◽  
pp. 133-135 ◽  
Author(s):  
Stefan Rues ◽  
Melissa Fugina ◽  
Peter Rammelsberg ◽  
Stefanie Kappel
Keyword(s):  
Dental Implants ◽  
In Vitro Study ◽  
Vitro Study ◽  
Single Crown
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