2024-03-29T08:39:29Z
https://adjg.journals.ekb.eg/?_action=export&rf=summon&issue=6624
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Effect of Different Chelating Agents on Bond Strength of C-Point Obturating System to Radicular Dentin
Sara E.
Abdelaziz
Mervat I.
Fawzy
Hagar A.
Bastawy
This study was designed to assess the effect of 17% ethylenediaminetetraacetic acid (17%EDTA) and 0.2% Chitosan as chelating agents on bond strength of CPoint obturation system to root canal dentin. Materials and Methods: Fifty extracted lower premolars were selected and prepared using Universal ProTaper rotary files then the samples were equally distributed into 2 main groups depending on the type of the final rinse. Group I:17 % EDTA, Group II: 0.2% chitosan, Control group: distilled water. Each main group was further equally distributed into 2 subgroups depending on the type of the filling material. Subgroup A: samples were obturated with gutta-percha and AH Plus sealer. Subgroup B: samples were obturated with CPoint and EndoSeqence BC sealer. The push out test was carried on using universal testing machine. The sealer penetration inside the dentinal tubules was evaluated using scanning electron microscope (SEM). Results: regarding the results of subgroup A and B, at all levels, the highest value of bond strength was recorded in samples treated with 17% EDTA, while the lowest value was recorded with the control group and there was no statistical significant difference among the tested groups except for subgroup B at the middle level, there was a statistical significant difference among the tested groups. SEM observation of sealer/ dentin interface revealed few traces of sealer penetration with samples treated with 17% EDTA. Conclusion: 17% EDTA when used as final rinse produced higher bond strength with CPoint/EndoSequence BC sealer compared to 0.2% chitosan, especially at the middle third
Chitosan
irrigating solution
CPoint
EndoSequence BC sealer
bond strength
2019
04
01
1
10
https://adjg.journals.ekb.eg/article_41961_9355191a8b6243317a57cea5001a0cd7.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Effect of Different Wall Thicknesses on Fracture Strength, Marginal Accuracy and Translucency of Monolithic Ceramic Restorations
Marwa M.
Abd El Aziz
Mona H.
Mandour
Rania A.
Shetawey
The present study was conducted to evaluate the effect of different crown wall thicknesses (0.5mm, 1mm and 1.5mm) on the fracture load, marginal accuracy, and translucency of monolithic CAD-CAM manufactured lithium disilicate and Zirconia crowns. Materials and Methods: 60 monolithic single were constructed using CAD/CAM machine divided into two groups according to the material of construction Group (E): Monolithic IPS e.max CAD lithium disilicate crowns and Group (B): Monolithic BruxZir Solid zirconia based crowns. Each group was divided into three subgroups according to the axial wall thickness of the crown into Subgroup (0.5): 0.5 mm margin thickness, Subgroup (1): 1mm margin thickness and Subgroup (1.5): 1.5mm margin thickness. The Vertical Marginal gap was determined using Digital microscope, while translucency parameter was determined using a Spectrophotometer, then the fracture load was determined using universal testing machine and finally fracture pattern was detected by scanning electron microscope. The collected data were statistically analyzed. Results: Vertical marginal gap values for both groups (E and B) were within the acceptable clinical range. The translucency parameters (TP) values in group E revealed a higher mean value than in group B for all subgroups. The fracture load in group B revealed a higher mean value than in group E for all subgroups.Conclusion: Increasing the wall thickness can effectively increase the fracture strength while decrease the marginal gap and translucency of the monolithic lithium disilicate ceramic crowns and zirconia crowns.
monolithic
CAD-CAM
Lithium Disilicate
Solid zirconia
wall thicknesses
2019
04
01
115
122
https://adjg.journals.ekb.eg/article_41962_b2d490719d09a276ad827bf64ecbf11f.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Effect of Silanized Silicon Dioxide and Titanium Dioxide Nanoparticles Loading on the Compressive Strength of Prepared Composite Core Material
Mai M.
Elbatanony
Sayed H.
Saniour
Maha A.
Niazy
Inas T.
Motawae
Magdy W.
Sabaa
Dalia Y.
Zaki
Haidy N.
Salem
the aim of this study was to assess the effect of silanized silicon dioxide and titanium dioxide nanoparticles loading on the compressive strength of experimentally prepared resin composite core material. Materials andMethods: Resin matrix was prepared by adding 70 wt% Bis-GMA,30 wt% TEGDMA, 0.5 wt% CQ and 0.5 wt% EDAB. Sintering of the silica nanoparticles was performed and then the silanized sintered silica fillers together with titanium dioxide nanoparticles and silica nanoparticles were mixed with the prepared resin matrix. Specimens of the experimental and control resin composite were prepared in split Teflon moulds (4x6mm) for compressive strength testing using universal testing machine. Results: There was no statistically significant difference between results of the experimental and control resin composites. Conclusion: Addition of up to 85 wt% of nanofillers into traditional resin matrix produced a resin composite with comparable compressive strength to that of the commercial composite products commonly used as core material
Bis-GMA
TEGDMA
EDAB
2019
04
01
131
136
https://adjg.journals.ekb.eg/article_41964_8eb1bde12bf9d38ac5f557ea6aaf95cf.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Effectiveness of Chitosan as Final Irrigating Solution on Bond Strength of Resin Based Sealer to Radicular Dentin
Sarah S.
Hashem
Mervat I.
Fawzy
Hagar A.
Bastawy
This study was designed to assess the impact of Chitosan-acetate as final root canal irrigant on bond strength of resin-based sealer to radicular dentin.Materials and Methods: Forty extracted human lower premolars with single roots and canals were prepared with ProTaper Universal rotary files till size F4. The samples were dispensed into 3 experimental groups according to the final rinse used and control group (10 samples each); Group I: irrigated with 0.2% chitosan acetate, Group II:17% EDTA, Group III: distilled water and control group (IV): saline. The samples were obturated by cold lateral compaction technique using AH plus sealer. Samples were sectioned into three sections (each 2 mm-thickness) from coronal, middle and apical thirds of each sample. The push out bond strength test was performed using universal testing machine. Three sections from each group were split longitudinally in buccolingual direction where the sealer/dentin interface and the sealer penetration inside the dentinal tubules was evaluated using scanning electron microscope (SEM). Results: Regarding the coronal and middle levels, there was no statistical significant difference among the tested groups. However, at the apical level, there was a statistical significant difference among the tested groups. SEM observation revealed minimal sealer penetration in group I at the apical level, while in group II, there was minimal sealer penetration at the coronal and middle levels. Regarding group III, there was minimal sealer penetration at middle level, while in control group (IV), there was no sealer penetration. Conclusion: The effect of 0.2% Chitosan acetate on the push out bond strength of AH Plus sealer was comparable to that of 17% EDTA when used as a final rinse. AH Plus sealer showed better adhesion to the dentin in the presence of smear layer especially at the apical third.
Chitosan
irrigating solution
AH Plus sealer
bond strength
2019
04
01
137
146
https://adjg.journals.ekb.eg/article_42134_b6244842ebc4ae26058af3bab049fb5f.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Evaluation of Different Attachment Systems on Single Implant Retained Mandibular Overdenture
Sara
Medhat
Nesrin A El
Mahrouky
Hala M
Gamal El-Din
Nahed A
Abd El Moniem
This study was conducted to evaluate bone height around ball and socketand equator attachment in mandibular overdenture retained by single implant. Materialand methods: Ten completely edentulous patients were selected with ages rangingfrom 50-60 years. Single implant was inserted for each patient and they all receivedheat cured acrylic dentures. The ten patients were divided into two groups, group(I) have received ball &socket attachment, group (II) received equator attachment.In the fitting surface of the lower denture two holes where made between 6 and 7acrylic teeth and were filled with radioopaque material (amalgam) . These representedposterior marker areas of evaluation the bone height. Evaluation of bone height aroundthe implant and the posterior edentulous area which were marked for measurementwas done by CAD_CAM CT at the time of attachment placement then after 3 monthsthen 6 months. Results: In our study the comparison of equator and ball and socketattachments regarding the bone height changes around the implant revealed a significantdifference. On the other hand there was an insignificant difference when comparingthe distal extension area between them throughout the six months studies period.Conclusion: According to this study the equator attachment group indicates lessermarginal bone loss, as compared with the ball and socket attachment group, and thereis no difference in bone resorption on the posterior area of the ridge between the twoattachments
Implant
ball and socket
Equator
2019
04
01
147
152
https://adjg.journals.ekb.eg/article_42135_b5c24eef02d661a6382e3d86ef0900d3.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Evaluation of Shear Bond Strength of Self-Adhering Flowable Composite to Mineral Trioxide Aggregate and Biodentine
Asmaa O.
Abdel-Rhman
Mohsen N.
El-Din
Mahmoud H.
Mohamed
This study aimed to evaluate shear bond strength of mineral trioxide aggregate and biodentine to self-adhering flowable composite. Materials and Methods: eighty Double Split Teflon mold has been prepared with a central hole measuring (3mm in diameter and 2 mm in height) for the mold used for tested materials and (2mm in diameter and in height) for the other mold used for restorative material. The molds were filled with MTA and Biodentine. The mixing material MTA and biodentine applied to its mold (n = 40) and allocated into 2 groups. The specimens will store for72 hours at 37˚C and 100% humidity. After 72 hours, self-adhering flowable composite was applied over MTA and Biodentine with a height and diameter each of 2 mm. The samples were stored in Incubator for 24 hours at 37˚C to enhance setting and then removed from the mold. SBS was measured in a universal testing machine with a load cell of 5kN and a crosshead speed of 0.5 mm/min. Data were analyzed using Graph Pad Instat. A value of P < 0.05 was thought statistically significant. After homogeneity of variance and normal distribution of errors had been confirmed, student t-test was done for compared pairs. Chi square test was performed for failure mode analysis.Results: self-adhering flowable composite–Biodentine groups showed non significantly higher SBS values than the group made of self-adhering flowable composite–MTA (P > .05).Conclusion Biodentine exhibited higher SBS than MTA; therefore, they could be preferred under flowable composites
Self-Adhering Flowable Composite
Biodentine
Mineral trioxide aggregate
2019
04
01
153
159
https://adjg.journals.ekb.eg/article_42136_32f8b7c5ef955f88cc254430ae62a938.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Fracture Resistance of Endodontically Treated Maxillary Second Premolars Restored with Corono-Radicular Stabilization Method (In vitro study)
Mariem M.
Abu ElYazid
Mohsen M.
Nour El Deen
Mohamed A.
El Yasaky
This study aims to investigate the fracture resistance of endodontically treated maxillary second premolars using fracture resistance test. Materials and Methods: Fifty-five maxillary second premolars were selected. The teeth were divided into four groups (three experimental groups and one control group) each group consists of fifteen teeth. The control group consists of ten teeth. The experimental groups were divided according to the mechanical system used: Endo Star, Revo S, and Protaper. Each group was subdivided into two subgroups according to the presence of the crown or not. Endo star E5 group: (1.a) and (2.a), Revos group :(1.b) and (2.b), Protaper :(1.c) and (2.c).All groups were instrumented and obturated. The subgroups with crown preserved (1.a), (1.b), (1.c) were (MOD) prepared, only the first four subgroups were restored by corono-radicular stabilization method. All the samples were subjected to fracture resistance test. The significant level was set at P≤0.05. Results: In the first four subgroups: the control group (1.d) showed the highest values, there were no differences between the (1.a), the (1.b) and (1.c) groups. All the teeth fractures were favorable.In the second four subgroups, the highest mean fracture resistance value was obtained by the control group (2.d) followed by EE5 group (2.a). There was no significant difference between Revos (2.b) and Protaper (2.c) groups; both showed the lowest mean fracture resistance values. Conclusion: Although the various endodontically mechanical preparations didn’t affect fracture resistance of the coronal portion of the teeth, the fracture resistance of the radicular part was affected
Fracture resistance
Endo star E5
Revo S
ProTaper
Corono-radicular stabilization technique
2019
04
01
161
167
https://adjg.journals.ekb.eg/article_42137_d97172f7938e28fff85de0fff6935ba5.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Impact of Different Movement Kinematics on the Deformation of TF Adaptive Files
Sabah M
sobhy
Mervat I.
Fawzy
Hagar A.
Bastawy
This study was designed to evaluate the effect of different movement kinematics on the deformation of TF Adaptive files using Dental Operating Microscope (DOM) and Scanning Electron Microscope (SEM). Materials and Methods: One hundred and eighty extracted human mandibular molars were selected with curved mesiobuccal canal (15º-35º). Thirty new sets of TF Adaptive files were divided into 3 groups according to the movement kinematics used (10 instruments each). Group I: 60 samples were instrumented with 10 TF Adaptive files in adaptive motion with TF Adaptive program Elements motor. Group II: 60 samples were instrumented with 10 TF Adaptive files in reciprocating motion with built-in reciprocating EndoEst motor mini, where the angle of reciprocation was set at 160° CCW and 41°CW. Group III: 60 samples were instrumented with10 TF Adaptive files in continuous rotation motion at 500rpm and torque 2 N/cm. Instruments were examined under DOM before usage and after each use for evaluation of deformation or fracture. Selected instruments from each group were evaluated using SEM. Results: there was no statistical significant difference among adaptive motion, reciprocating and continuous rotation motion in the mean deformation scores and percentage. The highest deformation scores and percentage was recorded in TF Adaptive instruments used with continuous rotation motion, however, there was no statistical significant difference. Conclusion: The innovated adaptive motion did not result in lower deformation of TF Adaptive files. Reciprocating motion produced less deformation in TF Adaptive files than did adaptive motion or continuous rotation motion, after preparing six root canals.
Adaptive motion
deformation
Dental operating Microscope (DOM)
Movement Kinematics
TF Adaptive Files
2019
04
01
169
176
https://adjg.journals.ekb.eg/article_42138_6bec55677521a46b0b4bac86079f59f1.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Marginal Adaptation of Lithium Disilicate Endocrowns with Different Cavity Depths and Margin Designs
Kholoud M
Soliman
Mona H
Mandor
Walaa
El Mekkawi
to study effect of different preparation designs on the marginal adaptation of lithium disilicate endocrowns. Materials and methods: Twenty human mandibular molars were selected to conduct the present study. All teeth were randomly divided into 2 groups (n=10 each) according to the preparation design of endocrown with two coronal cavity depths: Group (2D): Endodontically treated teeth with 2mm depth intra-coronal cavity preparation .Group (4D): Endodontically treated teeth with 4mm depth intra-coronal cavity preparation. Samples of each group were further subdivided into 2 subgroups (n=5 each) according to the preparation’s margin configuration: Subgroup (B): preparations with butt-joint margin configuration. Subgroup (S): preparations with 90o shoulder margin configuration. All prepared teeth were restored using IPS e.max Press endocrowns. The vertical marginal adaptation was measured after cementation using a Stereomicroscope. Measurements were made at twenty points for each crown. The recorded data were collected, tabulated and statistically analyzed. Results: shoulder finish line marginal preparation recorded lower vertical marginal gap values than butt joint marginal preparation. 2mm intracoronal cavity depth extension recorded lower vertical marginal gap values than 4mm intracoronal cavity depth extension. Conclusions: All obtained marginal adaptation values lie within the clinically accepted ranges. Increasing intra-coronal cavity depth of endocrown preparation negatively affects marginal adaptation of lithium disilicate based endocrowns. Endocrown with shoulder finish line marginal configuration has superior marginal adaptation than those with butt joint marginal configuration.
Endocrowns
Lithium Disilicate
marginal adaptation
marginal preparations
2019
04
01
177
185
https://adjg.journals.ekb.eg/article_42139_fe9ca6ae5ba2f14db7048e4dafb4008a.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Marginal and Internal Fit of Monolithic and Veneered Zirconia Crowns
Mai I.
Mohammed
Mona H
Mandour
Rania A.
Shetawey
The present study was conducted to evaluate the effect of veneeringzirconia frameworks on the marginal and internal fit of zirconia based restorations.Materials and methods: Forty natural premolars were prepared to receive all-ceramiccrowns. The forty premolars were divided into two groups according to the type of restoration.Group (I) consisted of ten samples restored using monolithic zirconia crowns.Group (II) consisted of thirty samples restored using veneered zirconia frameworks.Group II was subdivided into three equal subgroups according to veneering technique.Subgroup (IIA) veneered using manual layering technique, Subgroup (IIB) veneeredusing Press-on technique and Subgroup (IIC) veneered using CAD-on technique. Allthe finished crowns were cemented to their corresponding abutments then each toothwas vertically sectioned bucco-lingually into 2 sections. Marginal, axial and occlusalgaps were measured at seven defined points on each section using digital microscope.Results: The significance level was set at Panalysis revealed that there was a significant difference between groups andsubgroups. The greatest mean value was recorded in subgroup IIA, veneered usingmanual layering technique. Whereas the lowest mean value was recorded in subgroupIIC, veneered using CAD-on technique. Regarding the internal gap statistical analysisrevealed that there was a significant difference. The greatest mean value was recordedin group I (monolithic), whereas the lowest mean value was recorded in subgroup IIC,veneered using CAD-on technique. Conclusion: Veneering zirconia frameworks usingthe CAD-on technique produces superior marginal and internal adaptation of zirconiabased restorations.
CAD-on
monolithic
press-on
veneered
zircon
2019
04
01
187
194
https://adjg.journals.ekb.eg/article_42140_b0a664a586d4eda4e8d6944c48baf0cc.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
Micro- Computed Tomographic Evaluation of Marginal Fit of Different Monolithic all Ceramic Crowns Fabricated Using Two CAD/CAM Systems.
Asmaa
Abdel Gawad
Mohamed
El-yassaky
Atef
Fathi
Mona
Hossam El Din
the objective of the present in vitro study was to evaluate the effect of two different CAD/CAM systems on the marginal fit of three commercially available dental ceramics using micro-computed tomography. Materials and Methods: one human natural premolar was selected, received a standardized all ceramic preparation and duplicated using two types of die materials. PMMA dies were used for construction of E.max CAD and Vita Enamic monolithic crowns while zirconia dies were used for zirconia crowns. A total of thirty monolithic all-ceramic crowns (N=30) were constructed on the fabricated working dies. These were equally divided into 2 groups (n=15) according to the CAD/CAM system used as follows: group (I): Everest system and group (II): Zircon Zhan system. Each group was further subdivided into 3 subgroups (n=5) according to the ceramic material used into subgroup (E): E.max CAD glass ceramic, subgroup (Z): ice prettau zirconia and subgroup (V): Vita Enamic hybrid ceramic. Each sample was scanned for fit analysis using a quantitative micro-computed tomography scanner then were analyzed. Results: Everest CAD/CAM system showed statistically significantly lower mean marginal gap distance than ZirconZahn. Either with Everest or ZirconZahn; E.max CAD showed the statistically significantly highest mean vertical marginal gap distance followed by Zirconia while Vita Enamic showed the statistically significantly lowest mean vertical marginal gap distance.Conclusions: Micro-CT technology presents a reliable tool for evaluation of the dental restorations fit. Also, superior marginal fit is achievable with monolithic CAD/CAM hybrid ceramic compared to both zirconia based and glass ceramics
Marginal fit
micro CT
Hybrid ceramics
monolithic crowns
E.max CAD
2019
04
01
195
201
https://adjg.journals.ekb.eg/article_42141_5072788517c15024e827b931a0028391.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
The Effect of Occlusion and Two Denture Base Material on Muscle Activity and Masticatory Efficiency of Complete Dentures
Marwa
Ezz El-Din
Mohammed
Essam El-Din Sanad
Hala M.
Gamal El-Din
The aim of this study was to evaluate the effect of occlusion and two different denture base material on muscle activity and masticatory efficiency of complete dentures. Material and Methods: Two complete dentures of different material, conventional and flexible denture base material with different occlusal schemes, starting with unbalanced occlusion and converted into bilateral balanced occlusion through three different ways of remounting, laboratory, clinical and intra-oral selective grinding applied on three different posterior teeth assemblies were delivered to patients who were totally edentulous (all were men range age 50-60 years). Muscle activity and masticatory efficiency were evaluated with two different type of food, carrots resembling hard food and banana resembling soft food. The occlusal schemes were switched on the patients’ denture bases. Two-way repeated-measures ANOVA and t test were used to examine the alterations between the occlusal schemes, denture base materials and chewing strokes and their relations. Results: No significant difference was found in electromyographic activity or masticatory efficiency between the occlusal schemes and denture base materials with soft food (p<0.05). A significant difference was found in electromyographic activity and masticatory efficiency with bilateral balanced occlusion obtained through clinical remounting with flexible denture base material with hard food. Conclusions: Within the limitation of this study, it was concluded that complete dentures with bilateral balanced occlusion obtained through clinical remounting found significant differences in muscle activity and masticatory efficiency with hard food. Flexible dentures are better than conventional dentures in muscle activity and masticatory efficiency.
conventional
Flexible
occlusion
electromyography
adjustments
2019
04
01
203
211
https://adjg.journals.ekb.eg/article_42309_ab34f6990f32483226989735d7bd0955.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
The Efficacy Of Computer Guided Surgery In Preserving Ramal Height And Skull Base During Gap-Arthroplasty In Patients With TMJ Bony Ankylosis
Hanan
Reda
Susan
Abd El Hakim
Ghada
Khalifa
The aim of the study was to compare between computer guided surgery and the traditional method in preserving vertical ramus height (VRH) and the skull base thickness during gap arthroplasty in patients with the TMJ bony ankylosis. Material and methods: Twelve patients with 15 joints suffering from true bony TMJ ankylosis were included in this study. The patients were divided into 2 groups: Group A (8 joints); The ankylosis was released by computer-assisted 1cm gap arthroplasty. Group B (7 joints); The ankylosis was released by traditional 1cm gap arthroplasty. Pre and postoperative clinical examinations included: measurements of maximum interincisal opening, midline deviations or deflections during mouth opening or closing, presence of open bite, recording any sign/symptoms of infection, facial nerve function evaluation. Preoperative radiograph were measure the preoperative VRH, and aid in construction of the surgical guide for group A, while, postoperative radiograph performed for measure the VRH and skull base thickness. Result: Clinically improvement in the midline shift and occlusion during physiotherapy period postoperatively for all cases in group A except in one patient. While, clinical result in group B revealed increase in the midline shift, and change in occlusion postoperatively. Radiographically: there was no statistical significant difference between the 2 groups in postoperative VRH loss measurements. There was statistical significant difference between the 2 groups in postoperative skull base thickness. Conclusion: Computer assisted surgical simulation could help the surgeon to preserve the VRH and the skull base that reflects positively on the postoperative clinical outcomes.
Temporomandibular joint
ankylosis
Surgical Guide
2019
04
01
213
222
https://adjg.journals.ekb.eg/article_42310_a93aa4afb6085afb5b4c1d7b7841fbe7.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
The Efficacy of Reciprocating Instruments versus Continuous Rotary Nickel-Titanium Instruments in Root Canal Retreatment with Different Filling Materials
Sara M.
Galal
Wael H.
Kamel
Mohsen M.
Nour El-Deen
The aim of this study was directed to rate the quality of differentEngine-driven retreatment files: ProTaper Retreatment files, Wave One system and OneShape system in removal of different filling materials. Material and methods: Nighty-six freshly extracted mandibular first molars were prepared with universal ProTaper rotary files till size F3 then categorized into two main groups (I and II) on the basis of type of material used in obturation. Group I: obturated with Gutta-percha, Group II: obturated with EndoREZ. Each One of them was categorized into three subgroups : sub group A, B and C on the basis of the system use (16 each), Subgroup A: using ProTaper Universal retreatment system, Subgroup B: using Wave One file, Subgroup C: using One Shape. Each subgroup was divided into two divisions according to the use of solvent or not (8 each). The residual obturating material was evaluated by the use of the stereomicroscope. Results: there was a significance unlikeness among tested groups, subgroups and subdivisions in the percentage of the residual obturating material Conclusion: Protaper retreatment instruments and Wave One file remove more filling material in comparison with OneShape file, regardless the amount of residual gutta percha filling material ,it was greater than with EndoREZ, Retreatment without the use of solvent was significantly faster and more effective than with solvent.
2019
04
01
223
229
https://adjg.journals.ekb.eg/article_42312_2f4e2697bd134ca6bb880155695181eb.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
2
The Remineralizing Effect of Incorporating Ca-Phosphate and Ca-Fluoride Nanoparticles into the Self-Etch Adhesives Used in Restoring Class I Cavities
Mona
Essam
Maha A.
Niazy
Hadeel
Farouk
Amani A.
Mostafa
This study was carried out to investigate the remineralizing effect of amorphous calcium phosphate (ACP) and calcium fluoride (CaF2) nanoparticles incorporated in two-step self etch- adhesives (in vivo). Materials and Methods: The nanoparticles were incorporated into the bond of ClearfilTM SE Bond at a mass fraction of 10%. A total of ten patients in the age range of 17-30 years old, having at least 3 carious lower molars, were enrolled in this study (split mouth design). Class I cavity preparation was performed, leaving the caries affected dentine at the pulpal floor. The 30 molars were divided into 3 groups (n=10) according to the type of adhesive used (A); namely: self-etch adhesive, Clearfil SE Bond (Control)(A1), Clear Fill SE Bond incorporated with ACP NPs (A2) and Clearfil SE Bond incorporated with CaF2 NPs (A3). After restoration placement, each tooth was radiographically evaluated at baseline (I0), after 1 month (I1) and after 3 months (I2) to assess the remineralizing effect of the adhesive systems used. Results: The adhesive containing ACP nanoparticles induced the highest remineralization potential during all the study intervals, followed by the adhesive containing (CaF2) nanoparticles. Conclusion: nanoparticles are capable of remineralizing the caries affected dentin when incorporated into two-step self etch adhesive
2019
04
01
231
238
https://adjg.journals.ekb.eg/article_42313_5f09a12c1fdb977a7c7748c06d07f723.pdf