2024-03-29T07:58:03Z
https://edj.journals.ekb.eg/?_action=export&rf=summon&issue=23501
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Efficacy of Multiple Rotary File Systems in Retreatment of Oval-shaped Root Canals in Mandibular Molars: A Cone-Beam Computed Tomography Study
Hayam
Hassan
Mohamed
Rabie
Mohamed
Ibrahim
Ahmed
Negm
Aim: To evaluate effectiveness of multiple rotary file systems on removal of the filling materials during retreatment of oval-shaped root canals. Methods: 40 oval root canals were instrumented with ProTaper Next to size X4. The canals were allocated into two equal groups according to the final rinse, Group I: with Biopure MTAD, and Group II: with 17% EDTA. All the canals were obturated with bioceramic based root canal sealer and gutta-percha using lateral compaction technique. According to the used retreatment rotary system, each group were further subdivided into two equal subgroups including subgroups Ia & IIa using D-Race (DR1) + XP-endo Shaper (XPS) + XP-endo Finisher R (XPFR), and subgroups Ib & IIb using R-Endo retreatment files up to R3 + Revo-S rotary files up to (40/.06). CBCT scans were used to calculate the remaining amount of root filling materials at the pre scan (after obturation), and that of air at the post scan (after retreatment). The dentin volumes were also recorded at both scans to analyze the amount of remaining filling materials. Results: No significant differences were recorded regarding the amount of residual filling material with the tested systems (p > 0.05). Intra subgroups assessments showed more filling material removed when using a larger sized final instrument (p < 0.001). Conclusions: Tested file systems were evenly efficient in removing filling materials from oval-shaped root canals of extracted molars. Types of chelators used and bioceramic based sealer had no significant validity on effectiveness of removal of root canal filling material.
retreatment
Oval-shaped root canals
R-Endo
XP-endo Shaper
XP-endo Finisher R
2021
04
01
1611
1618
https://edj.journals.ekb.eg/article_160212_4ec290055927d95a7ee4dc02eba4d43c.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Comparative Evaluation of the Effect of Intraligamentary Injection of Dexamethasone and Piroxicam on Postoperative Pain in Teeth with Symptomatic Irreversible Pulpitis: A Randomized Controlled Trial
Safwa
Abd El Glil
Siza
Zakhary
Maged
Negm
Fatma
Abu naeem
Postoperative pain management is a challenging problem in the clinical practice of endodontics. The aim of this study was to assess and compare the efficacy of local intraligamentary injection of dexamethasone and piroxicam on postoperative pain in mandibular molars with symptomatic irreversible pulpitis. Forty-two patients were included and randomly assigned to three equal groups (n=14). After administration of standard inferior alveolar nerve block, each participant received intraligamentary injection of 0.4 ml of either 8 mg/2 ml dexamethasone, 20 mg/ml piroxicam or 2% mepivacaine. Standard endodontic treatment was performed in a single visit. The pain was assessed by means of the Numerical Rating Scale preoperatively and postoperatively after 4, 6, 12, 24 and 48 hours. All demographic, baseline and outcome data were collected and statistically analyzed.There was no significant difference between the three groups regarding age, gender and preoperative pain. There was a significant reduction in pain in all groups, however, there was a statistically significant reduction in postoperative pain in piroxicam group compared to the mepivacaine group at all time intervals. There was a statistically significant reduction in postoperative pain in the dexamethasone group when compared to the mepivacaine group only at 4, 24 and 48 hours. However, there was no significant difference found at 6 and 12 hours. There was no significant difference between dexamethasone and piroxicam groups. It was concluded that preoperative intraligamentary injection of dexamethasone and piroxicam show a significant success in reducing postoperative pain compared to mepivacaine with no preference regarding using either of them.
dexamethasone
piroxicam
symptomatic irreversible pulpitis
intraligamentary injection
Postoperative Pain
2021
04
01
1619
1627
https://edj.journals.ekb.eg/article_160213_07d9cdc56cca4eb502f49e9af6e2dfea.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
The Effect Of The Addition Of Activated Charcoal To Different Formulations Of Calcium Hydroxide On Their Effect On The Fracture Resistance Of Endodontically Treated Teeth.
Medhat
Elfaramawy
This study aimed to evaluate the effect of the addition of the activated charcoal to different formulations of calcium hydroxide on the fracture resistance of endodontically treated teeth. Ninety one freshly human extracted single rooted teeth were selected. The samples were cleaned and shaped and classified according to the type of the dressing into five groups; Group 1; (21 samples) dressed with calcium hydroxide paste with Iodoform ( Metapex) (META,Chungcheongbuk-do,Korea ), Group 2; (21 samples) dressed with conventional calcium hydroxide with saline(GAMA dental lab,Cairo, Egypt ). Group 3; (21 samples) dressed with calcium hydroxide paste with Iodoform mixed with activated charcoal ( Eucarbon Sedico, Cairo, Egypt) and Group 4; (21 samples) dressed with conventional calcium hydroxide and activated charcoal with saline and Group 5; Control group (undressed). The samples were further classified according to the observation time into: Subgroup A; (7 samples) after two weeks. Subgroup B;(7 samples) after one month and Subgroup C; (7 samples) after two month. Samples were loaded vertically after the observation periods using Universal Testing Machine until fracture. The results showed that the fracture resistance of the samples dressed with either Metapex or conventional calcium hydroxide showed lower resistance to fracture than those dressed with either two formulations with activated charcoal. It was concluded that the addition of activated charcoal to the calcium hydroxide compounds can decrease their weakening effect on the endodontically treated teeth.
Calcium hydroxide
Activated charcoal
Fracture resistance
2021
04
01
1629
1623
https://edj.journals.ekb.eg/article_160214_77c65852252b7e1d77bb006a07b4f1c0.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Evaluation of Cutting Efficiency and Surface Characteristics of XP Endo shaper and iRaCe NiTi Rotary Endodontic Instruments (A Comparative In Vitro Study)
Samah
Salih
Siza
Zakhary
Marwa
Bedier
Aim: The aim of the present study was to compare the cutting efficiency of XP-Endo shaper and iRaCe nickel titanium rotary instruments after different number of uses and to evaluate the surface characteristics. Methodology: Forty-eight mesial roots were divided into two groups (n= 24) according to the type of the file system used (XPS/iRaCe) and was then subdivided into three subgroups (n=8) according to the number of uses (first use, second use and third use). Each specimen was prepared and irrigation was done using 5 ml of freshly prepared 2.5% NOCL, then 3 ml of 17% EDTA followed by 10 ml of distilled water. All root samples were weighted before and after preparation and weight loss was calculated. Two samples (Size 30 and Taper 0.04) from each file system were randomly selected and photographed using Scanning Electron Microscope (SEM) before and after the third use, at magnification 150x and 2000x. Comparing the cutting efficiency of each group at the different number of uses was done using analysis of variance (ANOVA) with multiple comparisons post hoc test. Results: There was statistically significant difference between XPS and iRaCe after each use (P≤0.05), with drop in the cutting efficiency in both groups after second and third use, and no statistically difference between second and third use (P>0.001). SEM examination of unused files showed manufacture defects, while files after third use showed other defects. Conclusions: XPS showed higher cutting efficiency than iRaCe, with reduction in its cutting efficiency after multiple use.
cutting efficiency
Defects
iRaCe
SEM
XPS
2021
04
01
1633
1640
https://edj.journals.ekb.eg/article_160219_27f83797a2b6aa7d01149b65b74cb102.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
The Effect of Different Organic Solvents of Filling Removal during Endodontic Retreatment
Nourhan
Esmat
Abeer
El gendy
Ahmed
Khalaf
Abstract: Objectives The aim of the study was Evaluation of the effectiveness of three different solvents (orange oil solvent, eucalyptol oil solvent, and chloroform) during retreatment regarding: root canal filling removal Methods were 33 premolar root canals were prepared by using protaper universal files for cleaning and shaping, obturation was done by lateral compaction technique. Samples were divided (n=11) Group A Chloroform, Group B orange oil, and Group C Eucalyptus oil according to the solvent used into three groups. Retreatment was done by combining two methods for filling removal as chemical by using organic solvents and mechanical by utilizing rotary retreatment files (protaper retreatment files). Roots were split longitudinally, canals were observed using a stereomicroscope at 6x. The images were subjected to morphometric analysis to assess the amount of remaining root filling material. Data were explored for normality using Kolmogorov-Smirnov and Shapiro-Wilk tests, data showed parametric (normal) distribution. Repeated measure ANOVA was used to compare between more than two groups in related samples. Results: The highest mean value was found in (Group A) followed by (Group B), while the least mean value was found in (Group C). A statistically significant difference was found between (Group C) and each of (Group A) and (Group B) (p < 0.001). No statistically significant difference was found between (Group A) and (Group B) (p=0.853). Conclusion: Chloroform and orange oil are preferable to be used in retreatment.
retreatment
solvents
remaining debris
2021
04
01
1641
1646
https://edj.journals.ekb.eg/article_160220_320f21c791064c5810f6aa030582a69f.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Comparative evaluation of four different remineralizing agents on dentin surface topography: an invitro study
Mohamed
Wakwak
Hamed
Elkady
Ibrahim
Basha
this study was designed to evaluate the effect of four remineralizing agents on surface topography of dentin. Materials and methods: 75 teeth were were divided according to the remineralizing agents into five treatment groups (Control C, CPP-ACP A, NovaMin V, n-HA N & NaF F) 15 teeth each. Time of pH cycling periods were divided to (one week (W1), two weeks (W2) and five weeks (W5) Results: Regarding all of pH cycle periods (W1, W2&W5); there was statistically significant difference between mean dentinal tubules diameter values of the control group on one hand and each of A, V, N and F groups on the other hand. However, there was no statistically significance difference between all those remineralizing agents. The N groups showed the lowest mean value of dentinal tubules diameter while the F groups showed the highest mean value of dentinal tubules diameter Conclusions: surface topography of dentin is positively affected by the application of remineralizing agents. Increasing the application rate (pH cycling periods) of the remineralizing agents significantly affect the surface topography of dentin.
remineralizing agent
surface topography
nano-hydroxyapatite
2021
04
01
1647
1655
https://edj.journals.ekb.eg/article_160222_f9ddb7a7a8e68a5788f2e6fc5ea1c41b.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Comparative Evaluation of Microhardness and Compressive Strength of Cention N, Bulk Fill Resin Composite and Glass Ionomer Cement
Rehab
Safy
Emad
Aboalazm
Objective: Evaluation of microhardness and compressive strength of Cention N in comparison to nanohybrid bulk fill resin composite and glass ionomer cement (GIC). Methodology: A total of 30 specimens were prepared for microhardness evaluation, divided into three key groups of ten specimens each depending on the type of bulk fill restorative material used; Cention N, Tetric Evo Ceram bulk fill resin composite and Fuji IX GP groups. Specimens were prepared using a specially constructed 4 mm thickness cylindrical Teflon mold with a diameter of 6 mm. All specimens were stored in distilled water at room temperature for 24 hours then subjected for Vickers microhardness tester. Assessment of compressive strength of the tested restorative materials necessitates fabrication of 30 specimens with a diameter of 3mm and 6mm thickness (ten specimens each). Universal testing machine was used for evaluation of compressive strength of all tested materials. Results obtained were subjected to one-way ANOVA and Tukey’s HSD test (P values of 0.05). Results: Both microhardness and compressive strength tests results showed that there was no significant difference between Tetric EVO Ceram and Cention N (p < 0.001), meanwhile both of them are significantly higher than Fugi IX GP. Conclusions: Under the limitation of the current study, the bioactive composite Cention N is a promising bulk fill resin composite restoration in the posterior region in terms of tested mechanical properties. Key words: Cention N, bulk fill resin composite, GIC, microhardness, compressive strength.
Cention N
Bulk Fill
GIC
Microhardness
Compressive strength
2021
04
01
1657
1662
https://edj.journals.ekb.eg/article_160223_c761536971710d739e48d13ebc1575aa.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
ASSESSMENT OF TECHNIQUE SENSITIVITY AND GINGIVAL HEALTH IN MANAGEMENT OF CERVICAL LESIONS PERFORMED USING SUBGINGIVAL CLAMP VERSUS RETRACTION CORD: A RANDOMIZED CONTROLLED CLINICAL TRIAL
Nada
Shehab Eldin
omar
shaalan
Shereen
Ibrahim
Aim: the current study was conducted to compare technique sensitivity and gingival health of carious and non-carious cervical lesions performed using subgingival clamps and retraction cords. Methodology: 24 teeth with carious or non-carious cervical lesions were divided randomly into 2 groups receiving one of the two gingival retraction techniques, either subgingival clamp (KSK clamp #44) or retraction cord (Ultrapak E), technique sensitivity was evaluated at baseline (before application) and immediately after application while gingival health was evaluated before and immediately after application, 2 weeks, 1 and 4 months. Statistical analysis was done using t-test, Chi-square test, Kruskal-Wallis test and Mann-Whitney test where significance level was set at P ≤ 0.05. Results: There was a statistical significant difference between retraction cord and subgingival clamp regarding time of application and gingival laceration, where retraction cord took longer application time (p=0.01) and subgingival clamp showed higher laceration frequency (P=0.033). Regarding patient satisfaction, isolation from crevicular fluids, need for local anesthesia, pink esthetic score, gingival bleeding and sensitivity, there was no statistical significant difference between both groups. Conclusion: Technique sensitivity and long term gingival health were the same for both groups except that subgingival clamp provided minimal chairside time and care should be taken upon clamp application to avoid gingival laceration.
Key words: Cervical lesion
gingival health
retraction cord
subgingival clamp
technique sensitivity
2021
04
01
1663
1676
https://edj.journals.ekb.eg/article_160226_a75c00448b9c322b4b2ae2aa89c6b430.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
REMINERALIZATION POTENTIAL OF GINGER AND ROSEMARY HERBALS VERSUS SODIUM FLUORIDE IN TREATMENT OF WHITE SPOT LESIONS: A RANDOMIZED CLINICAL TRIAL
Sara
Hassan
Amir
Hafez
Maha
Elbaz
ABSTRACT: Aim: The current study was conducted to evaluate the effectiveness of ginger and rosemary herbals versus sodium fluoride in remineralization of incipient enamel caries. Methodology: white spot lesions in anterior teeth of post orthodontic debanding patients received randomly two types of remineralizing agents, either ginger and rosemary gel or sodium fluoride varnish (bifluorid 10). White spot lesions were evaluated at base line one month and after 3, 6 months follow up periods by two blinded assessors to assess white spot lesion progression by Kavo DIAGNOdent. Results: Mann-Whitney test showed that there at baseline, sodium fluoride varnish group yielded similar readings as ginger and rosemary gel group (P=0.060). While at 1 month, ginger and rosemary gel group showed significantly higher readings compared to sodium fluoride varnish group (P<0.001). However, there were no statistically significant differences in readings of both groups at 3 months (P=0.302) and 6 months (P=0.070). Conclusion: Fluoride varnish and ginger and rosemary gel can decrease post-orthodontic white spot lesions. The herbals ginger and rosemary may be preferable for prevention purposes on initial remineralization of enamel lesions as more natural products are preferred today. Keywords: white spot lesions, ginger and rosemary in initial caries, sodium fluoride varnish, DIAGNOdent.
White spot lesions
ginger and rosemary in initial caries
sodium fluoride varnish
DIAGNOdent
2021
04
01
1677
1684
https://edj.journals.ekb.eg/article_160227_eaa5fdc292b3178d4906240a3aed7adf.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
THE MICROBIOLOGICAL ASSESSMENT OF DEEP CARIOUS LESIONS AFTER STEP-WISE EXCAVATION AND DIODE LASER CAVITY DISINFECTION (A SIX MONTHS RANDOMIZED CLINICAL TRIAL)
Shahenda
gamal
Eman
Abouauf
Hussein
Gomaa
Aim: To assess the antimicrobial effect of diode laser in deep carious lesions after step wise excavation of the tooth using bacteriological assessment method. Methodology: Thirty permanent molar in fifteen participants with deep occlusal carious lesions were randomly assigned into two groups (15 teeth each) group 1: Ca2OH stepwise excavation, group 2: laser disinfection. After cavity preparation, dentin samples were collected at baseline, after immediate disinfection with diode laser device and after six months follow up. Another dentin samples were collected from both Ca2 OH stepwise excavation and laser disinfection groups. These samples were subjected to microbiological evaluation, Streptococcus mutans on mitis salivarius (MS) agar, and Lactobacilli (LB) on Lactobacillus MRS Agar. Results: The results showed that diode laser had a significant difference from Ca2OH stepwise excavation group as it had a significant reduction on Streptococcus mutans and Lactobacillus counts in the laser disinfection group. Conclusions: The antibacterial effect of diode laser in the deep occlusal cavities was significantly different from Ca2OH excavation group. Diode laser disinfection method demonstrated successful clinical measurements when accompanied with step wise technique.
step wise
deep carious lesions
microbiological assessment
Diode laser
Disinfection
2021
04
01
1685
1692
https://edj.journals.ekb.eg/article_160230_75f0a60826a45169df0f83a3ce41535a.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Comparison of the Antibacterial Efficacy of Ibuprofen Versus Triple Antibiotic Paste Against Enterococcus Faecalis in Single Rooted Teeth
Ahmed
Rezk
alaa
elbaz
fatma
abu naeem
Aim: The aim of the present study was to compare the antibacterial efficiency of the anti-inflammatory non-antibiotic ibuprofen versus triple antibiotic paste as an intra-canal medication against Enterococcus faecalis. Methodology: Forty four single rooted teeth were decoronated and instrumented up to F4 ProTaper rotary files. Apical foramen was sealed with acrylic resin, and all the external surfaces were made impermeable with nail varnish, except for the coronal access. Roots were autoclaved at 121°C for 20 minutes, placed in Eppendorf tubes and contaminated with E. faecalis for 14 days. Teeth were divided into two groups of 22 teeth; (Group1: ibuprofen, Group2: triple antibiotic paste (TAP). Colony forming unit (CFU) counts were taken before placing the intracanal medications by a paper point sampling (CFU1). The tested medicaments were mixed with distilled water (1:1 w/v), placed inside the root canals, then canals were temporarily sealed, and incubated at 37°C for 7 days. After intracanal medication removal, the second count (CFU2) was taken as (CFU1) and the antibacterial action of each medication was determined by calculating the percentage of bacterial reduction when comparing CFU2 to CFU1, and then the antibacterial action of the tested medications was compared with each other. Results: There was no statistically significant difference between (T.A.P) and (Ibuprofen) groups in the percentage of bacterial reduction where (p=0.073). Both medications caused a reduction in the bacterial count from CFU1 to CFU2. Conclusion: Ibuprofen proved to have an antibacterial effect comparable to that of TAP.
Intracanal medicaments
TAP
Anti-inflammatory non-antibiotics
NSAIDs
Enterococcus faecalis
2021
04
01
1693
1700
https://edj.journals.ekb.eg/article_160231_0b86c3e66e47d2e72d660fb41452040a.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
The color change of indirect zirconia containing restorative materials – A comparative in vitro study.
dina
abdelrahman
Mostafa
kamel
ahmad
morsy
Aim: to evaluate the influence of immersion time in coffee staining solution on the color coordinates of two Zirconia-containing indirect aesthetic materials. Material and methods: 20 Discs were used in the current study; samples have been divided into two groups in accordance with the material used (monolithic Zirconia restoration group [Zirconia] and indirect Zirconia silicate filled composite restoration group [Ceramage]. The samples were prepared and then immersed in coffee [staining solution]. Spectrophotometric analysis was made immediately after manufacturing of discs at (T0), at 7days (T1), 14 days (T2) and at 21days. Results: At T0-T1, T1-T2, T0-T2 and T0-T3, the mean ΔE of Zirconia showed statistically significantly lower value than Ceramage. At T2-T3; no statistically significant difference between mean ΔE of the two ceramic types was found (P-value = 0.155, Effect size = 0.235). Regardless of time; Zirconia showed a statistically significant lower mean ΔE than Ceramage after staining protocol. Conclusion: The ΔEs of tested CAD/CAM Zirconia ceramics is considered color stable in comparison to zirconia filled composite (Ceramage), and better resistant to external coffee staining. Color difference (ΔE) between different test specimens at different immersion or contact/time in coffee drinks showed clinically un acceptable range above 3.3 units). Thus, Zirconia filled lab composite is not aesthetically stable in color. Further studies are required to assess the color stability of different zirconia containing indirect restorative materials upon exposure to different oral conditions with aging inside the oral cavity.
Keywords: Ceramage
indirect Zirconia
color stability
2021
04
01
1701
1709
https://edj.journals.ekb.eg/article_160235_b5fd0bad1a483a955d8581d719ca32b4.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Comparative Assessment of remineralizing potential of recent biomimetic remineralizing agents on sub-surface carious lesions: An in vitro study
Walaa
Alsamolly
Introduction: Enamel demineralization and remineralization are considered dynamic and continuous process that occurs throughout the life. Subsurface caries is distinct when the amount of subsurface minerals missed go above the amount of minerals secured. The biomimetic remineralizing protocol is planned to encourage maximum maintenance of healthy dental hard tissues in subsurface stage. Aim: Directed to assess the remineralizing potential of self-assembling peptide P11-4, phosphorylated chitosan and nano hydroxyapatite paste on subsurface carious lesions. Materials and methods: Forty sound non-carious human anterior teeth were used. The teeth were divided into four groups (10 teeth each). Group A1: control; Group A2: using Curodont repair; Group A3 using phosphorylated chitosan and; Group A4: using nanohydroxyapatite paste. All products were applied according to the manufacturer's instructions and each group was subdivided into two groups according to the storage time group B1: 3 months and group B2: 6 months. Calcium and phosphorous weight and ratio were assessed using dispersive X-ray energy and Diagnodent pen at base line then after 3and 6months. The mean and standard deviation values were calculated for each group in each test. Results: Specimens treated with Curodont repair after six months record the highest mean value while the lowest mean value was found in artificial saliva, also for all remineralizing agents (Curodont repair, phosphorylated chitosan, and Nanohydroxyapatite paste) and control group the remineralization potential was increased by increasing the storage time (three month and six months). Conclusion: Curodont repair is considered a valuable biomimetic remineralizing agent. Keywords: Remineralization, Chitosan, self-assemblingpeptideP11-4, Nanohydroxyapatite paste.
Keywords: Remineralization
Chitosan
self-assemblingpeptideP11-4
Nanohydroxyapatite paste
2021
04
01
1711
1722
https://edj.journals.ekb.eg/article_160236_b12946a8a770f7fa63bb4c1fa962e563.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Management of Unusually Fused Maxillary Central Incisor: Case Report
Fahd
Aljarbou
Various anomalies can be observed around the central incisors such as a fused tooth. Despite its rare occurrence, dental management can be difficult. This study presents a treated fused maxillary central incisor treated nonsurgically in single visit endodontics. Cone-beam computed tomography (CBCT) was very helpful to overview the anatomy of this tooth and plan it prior to treatment. The patient consent was obtained and treatment was initiated. The supernumerary part was removed, and double access of each coronal parts were done separately allowing non-surgical root canal treatment of the two roots followed by final composite resin restoration. The patient was referred back to his orthodontist to continue the planned treatment. The patient was recalled after a year and the overall outcome was deemed successful. This report shows the benefits of a multidisciplinary treatment approach and the advantageous use of modern radiographic techniques. benefits of the multidisciplinary treatment approach and the advantageous use of modern radiographic techniques.
CBCT
Fused tooth
Multidisciplinary
Unusual tooth
Supernumerary tooth
2021
04
01
1723
1727
https://edj.journals.ekb.eg/article_160237_e96e2dd3c2e1205e1481df19ac7610d2.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Effect Of Chemo-Mechanical Caries Removal On The Micro-Tensile Bond Strength Of Resin Composite Using Universal Adhesive To Caries Affected Dentine
Hend
Ahmed
Hossam
Elhussiny
Aim: to evaluate effect of chemo-mechanical caries removal on micro-tensile bond strength (µTBS) of composite using universal adhesive to caries affected dentine. Materials and methods: 64 permanent molars were used. 32 were sound and the other (32) were carious. Carious molars were divided into four groups as followed Group 1: caries was removed by Carisolv then universal adhesive was applied with etch and rinse approach followed nanohybrid composite to be tested with µTBS test after 24h. Group 2: as group (1) but tested after 3 months. Group 3: same as group (1) but using self-etch mode and tested after 24h. Group 4: as group (3) but tested after 3 months. Sound molars were divided into four groups according to bonding mode and according to the time of bond strength testing. Carisolv was applied according to manufacturer’s instructions. The universal adhesive used with both approaches following manufacturer’s recommendations. Nanohybrid composite was packed. For delayed groups specimens were stored in distilled water for 3 months. The specimens were cut to produce 1mm2 beam-shaped specimens for µTBS test. The fractured specimens were examined to determine mode of failure. Results: there was a statistically significant difference in µTBS values between different adhesive approaches at each storage time. Etch & Rinse approach yielded significantly highest µTBS mean values in both Caries affected dentin and sound dentin for both times. Conclusion: the etch and rinse approach is the indicated approach for bonding of the used universal adhesive to caries affected dentin especially after chemo-mechanical caries removal.
chemo-mechanical caries removal
caries affected dentin
multimode universal adhesive and microtensile bond strength
2021
04
01
1729
1741
https://edj.journals.ekb.eg/article_160239_bc9cab8c51e1e4f82266b30762f49a8c.pdf
Egyptian Dental Journal
0070-9484
0070-9484
2021
67
2
Effect Of Different Surface Pretreatment Protocols On The Micro-Shear Bond Strength Of Resin Composite To Resin Infiltrated Demineralized Enamel
Hend
Ahmed
Nermeen
Hamza
Hossam
Alhussiny
Aim: to assess micro-shear bond strength (µ-SBS) of composite using universal adhesive to resin infiltrated demineralized enamel after different surface pretreatments. Methodolgy: Thirty-six intact maxillary central incisors were used. Teeth were mounted in acrylic blocks. Specimens were divided into three groups ;Group 1: teeth with sound enamel were bonded to resin composite (positive control). Group 2: teeth were demineralized then bonded to resin composite (negative control). Group 3: teeth were demineralized followed by application of (Icon-DMG). The third group was divided into four subgroups according to surface pretreatment either no surface pretreatment, abrasive roughening, air abrasion, combination of roughening and air abrasion. All specimens except positive control were demineralized by demineralizing solution. In resin infiltration group, Icon (DMG) was applied following manufacturer’s instructions then specimen’s surfaces were treated as mentioned before. Etch and rinse approach using universal adhesive was applied before composite packing. Five 2millimeters long micro-tubes were mounted and held in place on the uncured adhesive. The adhesive coat was then light cured and composite was packed in the microtubes. Microtubes were peeled obtaining five microcylinders for µ-SBS testing. µ-SBS testing was done using a universal testing machine with orthodontic wire to produce shear forces. Results: statistically significant difference in µSBS values between different study groups was found. The highest µSBS mean values were in positive control, grinding and air abrasion groups, followed by no treatment group, combination group. While negative control yielded lowest µSBS values. Conclusion: surface pretreatment is mandatory to improve bonding to resin infiltrated enamel.
Demineralized enamel
White spot lesions
Resin infiltration
universal adhesive and micro-shear bond strength
2021
04
01
1743
1751
https://edj.journals.ekb.eg/article_160243_2567274f6f547ad9a39b5ba6b99f85ba.pdf