2024-03-29T13:10:50Z
https://adjg.journals.ekb.eg/?_action=export&rf=summon&issue=6305
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
A Comparative Evaluation of EQUIA Forte Microleakage Versus Resin-Modified Glass Ionomer
Aya
Ali
Magda
EL-Malt
Eman
Mohamed
Purpose: To compare between micoleakage of EQUIA Forte and resin modified glass ionomer cement in primary and permanent teeth. Materials and methods: Preparation of class v cavities on the labial surface of 45 primary anterior teeth and 45 premolars was done. Teeth were then grouped and restored with EQUIA Forte, Fuji II LC, or Riva light cure. The microleakage at tooth restoration interface was done using dye penetration test with methylene blue. Scores were recorded for dye penetration depth at the occlual and cervical margins using stereomicroscope.Results: Occlusal and cervical segments of primary and permanent teeth showed that higher scores were recorded in Fugi II LC, lower scores were recorded in Riva light cure and the lowest scores were in EQUIA Forte. Chi square test revealed a significant difference between restorative materials (p=0.00). Conclusion: Among the three restorative materials, EQUIA Forte can be considered as the best material in the term of microleakage. Periodic evaluation is advised when any of the three materials are used in clinical practice.
EQUIA Forte
Fuji II LC
methylene blue
Microleakage
Riva light cure
2019
07
01
249
254
https://adjg.journals.ekb.eg/article_62103_392fe11a5ba1a34da0efbfaf1345c98a.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Effect of Zirconia and Alumina Nanofillers on the Microstructure and Some Properties of Flowable Composite
Heba
Abd El- Hafez
Muhammed
Masoud
Heba
El Tayeb
Purpose:studying the effect of reinforcing flowable composite with different concentrations of zirconia and alumina nanofillers on its microstructure, complex viscosity, colour changes, flexural strength and degree οf cοnversiοn.Materials and Methods:180 samples were divided according to nanofillers type into two groups(n=90),each group was subdivided into five subgroups according to concentration of fillers (0%,2%,4%,8%and16%)(n=20). Each group was subdivided into 4 subdivisions according to type of test performed(n=5).Samples were characterized by SEM, viscosity was measured by oscillatory rheοmeter, colour changes was measured using spectrophotometer, fǀexural strength was measured by three point bending test and degree of conversion was measured by FTΙR.Results: SEM showed homogenous distribution of zircοnia and alumina np at 2&4wt%, some agglomeration for both types of fillers at 8wt%. For complex viscosity, zirconia np at 16wt% at 25℃ had higher median value compared to 37℃ (6.17), Alumina np at 2wt% and 4wt% at 25℃ had higher median value compared to 37℃ (5.665),(8.516) respectively. For colour changes, zr& al np at 4wt% showed the highest mean values(10.2±1.5,11.1±1.4) respectively. Ιn flexural strength, zirconia filler at 4wt% had higher mean value (137.8±18.1MPa)compared to alumina filler(94.4±16.9 MPa). For DC, 4wt% for both zr& al np showed the highest mean values compared to other groups (66.4±2.4, 64.3±0.82) respectively.Conclusion: Viscosity increased as the concentration of nanofillers increased. Ιncorporation of nanofillers affect the cοlour of the flowable composite. Fǀexural strength was improved with increasing the concentration of zirconia nanofillers, while it decreased with alumina nanofillers. DC increased as the filler concentration increased till 4 wt.% then decreased.
nanozirconia
nanoalumina
Composite
reinforcement
2019
07
01
255
264
https://adjg.journals.ekb.eg/article_62237_d9edc2eff3cc7d5fa4a1a3681e0240c7.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Evaluation of Chelating Potential of Chitosan Citrate and Chitosan Acetate on Intraradicular Dentin
shaimaa
naem
Mervat
Fawzy
hagar
abdelnaby
Purpose: This study was designed to evaluate the chelating potential of chitosan citrate and chitosan acetate on intraradicular dentin using (ESEM) and quantity calcium content of intraradicular dentin using (EDX). Materials and Methods: sixty freshly extracted human single rooted lower premolars with single canal were instrumented with Revo-S files till size AS 35. The samples were divided into 5 experimental groups according to the final rinse used and control group (10 samples each); Group I: irrigated with 0.2% chitosan acetate, Group II: irrigated with 0.2% chitosan citrate, Group III: irrigated with 1% acetic acid, Group IV: irrigated with 1% citric acid, Group V: irrigated with 17% EDTA and control group which was divided into;(VIa) :5 samples irrigated with sterile saline and (VIb): 5 samples were neither prepared nor received any treatment. The cleanliness of the root canals and smear layer were evaluated at three root levels using ESEM. The calcium content of five samples from each experimental group (I,II,III,IV,V) and the samples of control group was measured using EDX. Results: At the coronal, middle and apical root levels; there was a statistical significant difference among the tested groups and the control . Regarding calcium content, the highest mean calcium content was recorded in samples treated with saline followed by samples that did not receive any irrigation Conclusion: The chelating potential of 0.2% chitosan acetate and 0.2% chitosan citrate is comparable to that of 17% EDTA when used as final rinse without much altering the calcium content.
Chitosan acetate
chitosan citrate
calcium content
intraradicular dentin
2019
07
01
265
273
https://adjg.journals.ekb.eg/article_62239_c83bbd7aa455c9c808e4d0a0514157e2.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Evaluation of GRP 78 Expression in Salivary Gland Tumors
amany
taha
eman
Abo Hager
adel
shouman
Purpose: The purpose of this work was to evaluate the expression of GRP78 as a prognostic indicator of aggressiveness in salivary gland tumors and to relate its expression with the biological behavior of the salivary gland tumors. Material and Method: 80 cases of salivary gland tissues were collected as paraffin embedded blocks: 30 benign cases (15 pleomorphic adenoma and 15 Warthin’s tumors) and 45 malignant cases (15 carcinoma ex pleomorphic adenomas, 15 mucoepidermoid carcinomas in addition to 15 adenoid cystic carcinoma). Additionally, 5 normal salivary gland tissues. Using GRP78 antibody, an immunohistochemical investigation was done for all specimens. Results: The mean area percent of immunoexpression was greatest in malignant variants of salivary gland tumors, followed by benign variants of salivary gland tumors and the least value recorded in normal salivary gland tissue. Conclusion: According to the current study, GRP78 is considered as a useful marker for diagnosis of malignancy of salivary gland.
GRP78
Immunohistochemistry
salivary gland tumors
2019
07
01
275
284
https://adjg.journals.ekb.eg/article_62241_78a2a42568ef000eb55617d21b467cb7.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Evaluation of Marginal Accuracy and Color Stability of Lithium Disilicate Laminate Veneer Compared to Hybrid Ceramic Veneer
Eman
El-Malah
Sahar
Abd El-Aziz
Suad
Hassan
Purpose: The purpose of the current study was to evaluate marginal accuracy and color stability of lithium disilicate laminate veneer compared to hybrid ceramic veneer. Materials and Methods: Forty maxillary teeth were collected and prepared (but joint preparation) to receive a laminate veneer. They were equally sub grouped (n= 20) to receive 2 types of laminate veneers (IPS E-max CAD and vita enamic). The veneer was milled from the blocks in a CEREC 3 Machine. All veneers were cemented with resin cement. All samples had been subjected to 20000 thermal cycles which are equivalent twenty years of clinical use. Marginal gap were measured by using universal serial bus (USB) Digital microscope. Colors were measured using a reflective spectrophotometer. Marginal gap and color were measured pre and post thermo cycles. Data were tabulated and statistically analyzed. Results: For the marginal gap, the two tested materials demonstrated an acceptable value. Regarding the color stability there was color change for both groups after thermal cycling with higher mean values for Vita Enamic than E-max and that was statistically insignificant. Conclusion: The E-max veneers recorded less marginal accuracy and more color stability than Vita Enamic and they did not affected by thermo cycling.
Emax
Hybrid ceramic
Reinforced ceramics
colors stability
veneer
2019
07
01
285
290
https://adjg.journals.ekb.eg/article_62242_926720c390cce0a0eed86d4eb1c79d0e.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Evaluation of MCAT Technique with SCTG and Conjugated with Melatonin in the Treat Gingival Recession Using Minimally Invasive Surgical Approach in the Esthetic Zone: A Randomized Clinical Trial
dina
younes
Eatemad
Shoreibah
Hala
Hazza
Purpose : This randomized split mouth study was designed assessing complete root coverage (CRC) in treating gingival recession Miller class I and II site defects with minimal invasive surgical approach in the esthetic zone using MCAT in conjugation with SCTG alone or soaked in 0.1 % melatonin gel .Method and Materials: six healthy patients (6 females) of total 22 Miller Class I, II site defect were treated with MCAT combined with SCTG alone (control group) and with MCAT in combined SCTG soaked with 0.1% melatonin gel (test group). Measurements of clinical parameters (CAL,RD,RW,KTW,PI) was evaluated before surgery and at 6 months after surgery. The primary objective was complete root coverage (CRC). Gingival crevicular fluid sampled and analyzed for anti-oxidative stress marker the GCF protein carbonyl (PC) before surgery, 2 days, 2 weeks and 3 months postoperatively.Results: Healing was uneventful in all cases without any complications. 6 months post surgery CRC and other soft tissue clinical parameters were obtained in all patients within each group whereas, no statistically significant difference between the studied groups .CRC for control group was 58.3%, whereas for test group was 60%. .Conclusion: The current findings found the treatment modality results in predictable coverage of Miller Class I and II site defects. The influence of melatonin addition to SCTG on clinical parameters, although non- significant
modified coronally tunnel technique
Gingival recession
Root coverage
Subepithelial connective tissue graft
2019
07
01
291
297
https://adjg.journals.ekb.eg/article_62243_b07cea0d2f87ae7bf409b48811877f30.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Evaluation of the Effect of Irrigating Solutions on Push out Bond Strength of Bio-ceramic and Resin Based Endodontic Sealers
fatma
fouda
Mohsen
Nor. Eden
Mahmoud
Hassan
Purpose: This study was designed to assess the impact of irrigating solutions on push out bond strength of Bio- ceramic and Resin Based Endodontic Sealers. Materials and Methods: sixty extracted human teeth with straight single root and canal were prepared with RACE FKG rotary files till size 35 taper 06. The samples were dispensed into two experimental groups according to root canal sealer used (30 samples each). group1 Total Fill Bio-ceramic sealer after irrigation with, and Group 2: AH Plus sealer. The specimens were further randomly divided into two sub groups (15 samples each) according to the final irrigation solution applied. Group (a): irrigated with 17%EDTA, Group (b): irrigated with 2% CHX. The samples were obturated by single cone gutta-percha with vertical condensation technique. Results: regarding the groups. The type of irrigating solution affects the bond strength of total fill bio ceramic sealer. Final irrigation with EDTA result the highest bond strength of bio ceramic sealer to root dentine which was scientifically different from irrigation with CHX. Bond strength values was as follows: EDTA>CHX. Conclusion: the type of final irrigation affects the adhesion of total fill bio ceramic and AH plus sealers to root canal dentine
Bio ceramic
AH Plus
EDTA
CHX
bond strength
2019
07
01
299
304
https://adjg.journals.ekb.eg/article_62245_660580d4aa39782fa4aa9f6adae2734a.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Immunohistochemical Expression of Cortactin, E-Cadherin, and MDM2 Proteins in Solid Ameloblastoma versus Odontogenic Keratocyst (An immunohistochemical study)
hanaa
abdel Samiaa
Nadia
Radi
Eman
Abo Hager
Adel
Shouman
ABSTRACT Purpose: The extent of invasion can be analyzed by the expression and production of various genes and proteins by lesional cells. However, current clinical parameters lack the potential to predict the neoplastic behavior in solid ameloblastoma (SAB) and odontogenic keratocyst (OKC). Cortactin, an F-actin binding protein, overexpression has been correlated with advanced clinic pathological stage and poor prognosis in several tumors. E-cadherin belongs to the classical cadherins which. Low E-cadherin expression correlated to aggressive, poorly differentiated, high-grade carcinomas and low patient survival. Human-murine double minute 2 (MDM2), contributes to the promotion of cell growth, survival, invasion, and therapeutic resistance, overexpression of MDM2 has been observed in various human cancers and can contribute to genomic instability, thus, further promoting tumorigenesis. The purpose of this work was to investigate the role of Cortactin, E-Cadherin, MDM2 proteins expression in SAB and OKC and correlate the expression of these markers with the aggressive behavior of these tumors. Material and method: 10 case of solid ameloblastoma with its different histologic variants and 10 cases of the keratocystic odontogenic tumor were collected as paraffin embedded blocks. An immunohistochemical investigation using, Cortactin, E-Cadherin, and MDM2 antibodieswere done for all specimens. Results: The mean area percent of immunoexpression of Cortactin was greatest in SAB while, the mean area percent of immunoexpression of E-Cadherin, MDM2 were greatest in OKC. Conculsion: According to the current study, the absence of any significant differences between AB and OKC indicate the neoplastic and aggressive nature of OKC similar to AB.
Keywords: Cortactin
E-Cadherin
MDM2
Solid Ameloblastoma
Odontogenic Keratocyst
2019
07
01
305
316
https://adjg.journals.ekb.eg/article_62246_2325725b0c0e0ac8db5c74c8c329b453.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Preparation and Characterization of TiO2-SiO2 Bioceramic Coating on Ti Alloy via Electrochemical Anodization and Its Effect on Corrosion Resistance
rasha
marzouk
Eatemad
Shoreibah
Inas
motawae
madiha
shoeib
AbstractPurpose: The present study was carried out to study changing the anodization parameters and investigate the corrosion resistance of the ceramic coating that will be formed on the CP-Ti by anodization method. Materials and Methods: CP-Ti (10mm×10mm×2mm) were used for fabrication of bioceramic coating through anodization with different parameters using potassium silicate electrolyte. Samples were characterized using XRD, AT-FTIR. Surface roughness was measured using ESEM and surface topography was evaluated by SEM. Tafel polarization and electrochemical impedance spectroscopy were used to detect the change in the corrosion resistance after anodization. Results: XRD revealed that the anodized coated samples showed well defined peaks of Ti and TiO2 and shallow peaks of SiO2. AT-FTIR showed stretching bands of titania and silica. Surface roughness results: anodized coated samples at the optimum conditions had the lowest Ra values while the uncoated group had the highest Ra value. Results of the surface morphology: best evenly distributed ceramic coat was formed at the optimum conditions where (the applied voltage =50v, the electrolyte concentration =3% and process duration=60min). Corrosion resistance of the anodized coated samples at the optimum conditions was markedly increased more than that of the uncoated CP-Ti. Conclusions:optimum conditions of the anodization process to get a uniform anodized coating can be achieved when; the applied voltage is 50v, the electrolyte concentration is 3% and the process duration in 60min. Moreover, formation of a bioceramic coating has been shown to be a useful method for improving the corrosion resistance.
Anodization
CP-Ti implant
Corrosion Resistance
Surface Morphology
2019
07
01
317
328
https://adjg.journals.ekb.eg/article_62247_e1b90f9d535cc5920b4e7b42a8ac7a65.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
The Anticipated Effect of Both Zamzam Water and Epidermal Growth Factor (EGF) Separately on Tongue Tissues and Lingual Salivary Glands of Diabetic Albino Rats.
Noura
Ghareeb
mona
farid
heba
adawy
Purpose: The aim of this study was to evaluate the anticipated effect of both Zamzam water and Epidermal growth factor (EGF) separately on tongue tissues and associated lingual salivary glands of diabetic albino rats,( Histological and Ultrastructure evaluation) Materials and Methods Eighteen male albino rats were selected and divided into four groups. Group I (control group) received no drugs, while rats of group II (diabetic group) received a single dose of alloxan intraperitoneal injection. Moreover, rats of group III diabetic and received zamzam water for 3 months and group IV diabetic and received EGF. All rats were sacrificed; tongue was dissected and processed for hematoxylin &eosin and transmission electron microscopy evalution. Results The diabetic group showed histological & ultrastructural changes in the tongue epithelium and underlying lamina propria, a condition which almost restored to normal in zamzam treated group and relatively restored in EGF group. Concolusion Zamzam water provides safer alternative nutritional strategy in restoring the integrity of the damaged epithelium of the tongue tissues after degenerative effect of DM. EGF cause relatively improvement of the damaged epithelium especially in basal cell layer, keratin layer and blood vessels in lamina propria of tongue tissue.
Tongue Tissue
Diabetes mellitus
Zamzam water
(EGF)
albino rats
2019
07
01
329
335
https://adjg.journals.ekb.eg/article_62248_e1a2baa0200c4b3009233c2bb727c1d6.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
The Effect of Application of Forsterite Nanoparticles in Different Protocols on Permeability of Superficial and Deep Dentin
Sarah
Mohamed ali
Maha
Niazy
Randa
Hafez
Maha
Elkorashy
Abstract:Purpose: This study evaluated and compared the effect of application of Forsterite nanoparticles in different protocols on permeability of superficial and deep dentin at different time intervals. Materials and methods: thirty human molars were used to prepare 60 dentin discs, divided into three main groups (n=20) (P); (P1): Forsterite nanoparticles alone, (P2): Forsterite nanoparticles added to an adhesive system and (P3): Forsterite nanoparticles incorporated in Glass Ionomer. main groups were subdivided into two subgroups (n=10) according to the dentin depth (D); (D1): superficial dentin and (D2): deep dentin. Permeability was measured at three time intervals (T); (T1) baseline, (T2) after one week and (T3) after four weeks. Three wt% of forsterite nanoparticles were added to adhesive system and Glass ionomer. Teeth were sectioned to obtain superficial and deep dentin discs of; 1 mm (± 0.1mm) thickness. Modified Pashly’s split chamber was used to measure dentin permeability at baseline and after application of different protocols. Representative samples were assessed with ESEM and EDAX. Results: all protocols showed permeability reduction. (P2) showed the least permeability at T2 for superficial and deep dentin discs, (P1) showed the least permeability at T3 for both superficial and deep dentin discs and (P3) showed the least permeability reduction. Conclusion: it was concluded that Forsterite nanoparticles applied in different protocols can reduce dentin permeability in superficial and deep dentin. Superior dentin permeability reduction could be achieved after one week of using Forsterite nanoparticles added to the adhesive system and four weeks after using Forsterite nanoparticles alone.
Keywords: dentin permeability
forsterite nanoparticles
Adhesive system
Glass Ionomer
2019
07
01
337
353
https://adjg.journals.ekb.eg/article_62249_07e2e521d5368bfbcc182ca19ee19d0c.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
The Effect of poly Amido Amine Denderimer Pretreatment Alone or with Nano hydroxyapatite Containing Adhesive on the Integrity of Resin Dentin Bond after PH Cycling.
Fadia
Shosha
Mohamed
Al-Yasaky
Nevin
Gad
Purpose: The purpose of the current study was to evaluate the effect of poly amidoamine dendrimer pretreatment alone and with Nanohydroxy apatite containing adhesive on the integrity of resin dentin bond as affected by PH Cycling . Materials and Methods: A total of eighty dentin samples were divided into four main (A) groups according to the material used where in (A1) group: (PAMAM –NH2) alone, (A2) group: HA containing adhesive alone,(A3) group :Combination of (PAMAM-NH2 +HA adhesive),(A4) group: The control adhesive alone .And each of (A) groups were further subdivided into two (B) groups according to PH Cycling where (B1) exposed to PH Cycling while (B2) not exposed. After (21 days) the shear bond strength of the specimens was measured and the samples were examined by(ESM).Results: For both (B1) and (B2),the results revealed that the highest mean value was recorded in (A3B1) and (A3B2) group while the lowest mean value was recorded in (A4B1)and (A4B2). Conclusion: All the treatment materials used were effective in improving the bond strength and the PH Condition has a significant role in the efficacy of different materials in increasing the bond strength.
Key words: PAMAM-NH2
Nanohydroxy apatite
SEM
bond strength
PH Cycling
2019
07
01
355
360
https://adjg.journals.ekb.eg/article_62250_e83a52204386a93e835850e9e72363c3.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
The Efficacy of Adhesion of C-Point Obturation System in Retreated Root Canal Walls.
sarah
mohamed
Mervat
Fawzy
hagar
abdelnaby
Purpose: This study was designed to assess the efficacy of adhesion of C-point obturation system to retreated root canal walls. Materials and Methods: Eighty extracted upper incisors were prepared using Universal ProTaper rotary files then distributed into 2 main groups. Group I: primary treated, Group II: retreated. Each group was further distributed into 4 subgroups depending on the type of the filling material. Subgroup A: were obturated with gutta-percha. Subgroup B: were obturated with gutta-percha and AH Plus sealer. Subgroup C: were obturated with C-point. Subgroup D: were obturated with C-point and BC sealer. The push out test was carried using universal testing machine. The sealer penetration inside the dentinal tubules was evaluated using scanning electron microscope . Results: regarding the results of group I and II, at all levels, the highest value of bond strength was recorded in primary treated samples, while the lowest value was recorded with retreated samples and there was no statistical significant difference among the tested groups except for subgroup B at the middle and apical level and subgroup D 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 retreated with C-point and BC sealer. Conclusion: C-point/BC sealer had the highest push out bond strength to intraradicular dentin in primarily treated group compared to gutta-percha/AH plus. However gutta-percha had the highest push out bond strength to interradicular dentin in retreated group compared to C-point/ BC sealer.
retreatment
C-Point
BC sealer
bond strength
2019
07
01
361
370
https://adjg.journals.ekb.eg/article_62251_47995814f969bbed86cd77ccb8a6f9ad.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
The Role of Porphoromonas Gingivalis in Rheumatoid Arthritis and Periodontitis by Using Subantimicrobial Dose Doxycycline
Zienab
farid
Eatemad
Shoreibah
Naglaa
ElKilani
Olfat
Shaker
Khalida
El.Elrefaei
ABSTRACTPurpose: The current study was directed to estimate the role of porphoromonas gingivalis in the relation between rheumatoid arthritis and periodontitis by using subantimicrobial dose doxycycline.Subjects and methodology: The current study was accomplished on twenty patients who had mild or moderate chronic periodontitis and rheumatoid arthritis they were partitioned into two groups: Group I; ten patients were exposed to mechanical debridement only and Group II: ten patients were exposed to mechanical debridement added to receiving small dose doxycycline (SDD) as a host modulatory agent (20mg twice daily) for three months. Results: group I exhibited a greatly significant improvement in clinical parameter in correlation to group II after three months follow up. Group II showed the statistically significantly lowest percentage decrease in number of bacteria in synovial fluid Conclusion: The adjunct use of doxycycline as host modulatory agent improved the treatment outcomes when used with mechanical debridement in rheumatoid arthritis and patients with periodontitis.KEYWORDS: Rheumatoid Arthritis, Periodontitis, low dose doxycycline, Porphoromonas Gingivalis
Rheumatoid Arthritis
Periodontitis
low dose doxycycline
Porphoromonas Gingivalis
2019
07
01
371
375
https://adjg.journals.ekb.eg/article_62252_83bc5f82f80b6d47ad776c98386b9dfd.pdf
Al-Azhar Dental Journal for Girls
ADJ-for Girls
2537-0308
2537-0308
2019
6
3
Effect of Reinforcement of Denture Base Resin with Zirconia on Bacterial Colonization and Some Mechanical Properties
marwa
ebida
Dina
Kholief
Shereen
Kabeel
AbstractPurpose: The aim of the study was to compare between zirconia reinforced acrylic resins with that conventional acrylic resins (PMMA) regarding bacterial colonization and some mechanical properties (flexural strength, surface roughness, and surface hardness). Material and methods: Clinical study: sixteen completely edentulous patients were randomly selected which their ages ranged from 50-60 years. Patients were divided into two groups. Patients in the first group received maxillary and mandibular complete denture made of PMMA (Group І) and patients in the second group received maxillary and mandibular complete denture made of ZrO2 reinforced acrylic resins (Group ІІ). Microbial biofilm was evaluated after three, six and nine months for each patient. Laboratory study: sixty specimens were constructed. The specimens were divided into two groups. Thirty specimens of PMMA (Group І) and thirty specimens of ZrO2 reinforced PMMA (Group ІІ) for testing FS, surface hardness and surface roughness Results: The results of microbial biofilm evaluation in group ІІ was significantly higher than that found in group I. The laboratory study results showed that FS and surface roughness in ZrO2 reinforced PMMA were significantly higher than conventional PMMA. Further, the study showed that an insignificant increase of surface hardness in ZrO2 reinforced PMMA when compared with conventional PMMA. Conclusion: Reinforcement of acrylic resin with ZrO2 in PMMA results in an increase of the microbial colonization and surface roughness of denture and improvement of some mechanical properties as flexural strength and surface hardness.
Zirconia
microbial evaluation
flexural strength
surface hardness
Surface roughness
2019
07
01
377
384
https://adjg.journals.ekb.eg/article_62253_38e53ecfc17934c6510c6293e01d27d3.pdf