Mustansiria Dental Journal

Effect Of Different Curing Times Of Composite Resin And Glass Ionomer Liner Use On The Pulpal Temperature

Fanar T. A.Al-Jadwaa — Sun, 16 Oct 2022 00:00:00 +0000

Aim: The present study was performed to measure intrapulpal temperature when photoirradiation of composite resin and glass ionomer liner at different curing times.
Material and Methods: Thermocouple (TC) was placed in the intrapulpal space of an extracted human mandibular premolar which had a ClassV cavity preparation (1.5mm dentin thickness remaining on the buccal surface), and restored with composite resin" a bulk fill "and with LED unit " a high-intensity " at different photoirradiation times (10, 20. & 40sec). A temperature increase was obtained during photo-irradiation.
Result: The Rise in intrapulpal temperature was associated with an increase in photo-irradiation times and significant in each study groups (p<0.05).
Conclusion: intrapulpal temperature increase was attributed to photo-irradiation's time of composite resin. However, temperature's increase during polymerization were below the critical value.

A clinicopathological study of Pyogenic Granuloma

Noor Natik Raheem — Sun, 16 Oct 2022 00:00:00 +0000

The aim of study: this study was done to assess the clinicopathological features including gender, age, and clinical variations of Twenty Two diagnosed oral pyogenic granuloma in Iraqi patients attended Al Hussein Teaching Medical Center, Karbala city

Materials and Methods: A retrospective study for the twenty two cases (22) diagnosed as Pyogenic Granuloma was achieved, the submitted biopsies during a3 years period from January 2018 to March 2021 at Al Hussein Teaching Medical Center, Karbala Health Office, Iraqi Ministry of Health. Data for the following parameters were reported gender, age, site, and clinical presentation (size, base attachment, surface and color).

Evaluation of Anti-bacterial Effect of Rhamnus Prinoides Mouthwash on Streptococcus Mutans Count in a group of Orthodontic Patients with Gingivitis

Karrar N. Al-Mujamaii, Athraa M. Al Waheb — Sun, 16 Oct 2022 00:00:00 +0000

Aim of the study: This study was conducted to evaluate the antibacterial effect of Rhamnus prinoides mouthwash against Streptococcus mutans in a group of orthodontic patients with gingivitis, and to compare the gingival index before and 3 weeks after using Rhamnus Prinoides mouthwash and placebo 2 times daily for study and control group respectively.

Materials and methods: Rhamnus Prinoides mouthwash was extracted from plant leaves, filtered, then it was mixed with ethanol after being dried. The anti-bacterial effect was evaluated by measuring the streptococcus mutans count before and after 3 weeks of using Rhamnus Prinoides mouthwash and placebo in study and control group respectively.

Results: Rhamnus Prinoides mouthwash demonstrated an anti-bacterial effect by significantly reducing the mean streptococcus mutans count from 14.23*10^-5±7.67 (CFU/ml) to 0.45*10^-5±0.28 (CFU/ml) in study group. While in control group mean streptococcus mutans count significantly increased from 13.79*10^-5±11.11 (CFU/ml) to 30.22*10^-5±33.57 (CFU/ml). The mean gingival index found to change significantly from the moderate type at the base line (gingival index = 1.53± 0.26) to mild type on the third week (gingival index= 0.97±0.007 ) in study group, while in control group it remained with moderate type from the base line visit (gingival index= 1.44±0.16) to the third week (gingival index= 1.46±0.16).

Conclusion: Rhamnus Prinoides mouthwash exhibited a significant anti-bacterial activity by reducing the streptococcus mutans count, and thus it can be considered as a promising oral health care product in the future.

The Influence Of Bacteriocin On The Soft Liner Tensile Strength And Its Inhibitory Effect On Candida Albicans

Inas Abdul Sattar Salman, Zahraa A. Khadam — Sun, 16 Oct 2022 00:00:00 +0000

Aim of the study. Many efforts were applied to use new antimicrobial agents due to the recent appearance of bacterial resistance to treatment. One of the antimicrobial agents is the Bacteriocin. Bacteriocins are small molecules produced by probiotics bacteria and have the ability to minimize pathogens colonization. This study performed to evaluate the effect of bacteriocin against candida albicans growth, inhibition of the formation of biofilm and tensile strength of the hot soft liner and compare the results with the use of denture cleanser tablets.

Materials and Methods. Two types of specimens were prepared first type to measure the tensile strength for the soft liner and the other type to measure the inhibition of growth and the biofilm of C. albicans. Each type was divided into subgroups (15 specimens each) to be immersed in water as control, Bacteriocin and denture cleansing tablets at different intervals. For the tensile strength test, rectangular hot cure soft denture liner specimens prepared with dimensions of 80mm*9mm*3mm length, width and thickness respectively. While for microbiological test, 10mm diameter and 3mm thick discs of heat cured soft lining material were prepared. The specimens used for the tensile strength test were divided into three groups according to the immersion method: 1^st group is the control immersed in water, 2^nd group immersed in Bacteriocin and 3^rd group immersed in denture cleansing tablet (Lacalut DENT Cleaning tabs/Germany). While for the microbiological test the specimens divided into control group, group treated with bacteriocin for 1 day and group treated with bacteriocin for 15 and 30 days. The same thing done for the specimens cleaned by denture cleansing tablets. The immersion was performed by placing the specimens in tube (10ml) filled with bacteriocin or cleansing tablet in water and kept for 15min. Then the specimens were removed from the tube and cleaned with tapped water and stored in distilled water. This was repeated for 15 days for the first group, and 30 days for the other group. The tensile strength was measured by the Instron testing machine, the inhibition of C.albicans growth and biofilm formation was tested by co-cultured method.

The Effect Of Surface Disinfections Of Gutta-Percha On Shear Bond Strength Of Three Root Canal Sealers

Nibras khalil Ibrahim, Zena Mohammad younis, Nawal A. AL_sabawii — Sun, 16 Oct 2022 00:00:00 +0000

Aim: The purpose was to study the influence of disinfectant solutions on shear bond strength between gutta percha (GP) and different sealers.

Materials and method: 90 GP samples were used. Glassionemer sealer group A (n=20), mineral trioxide aggregate( MTA) sealer group B (n=20), iroot sealer group C (n=20), control group (n=10) for each group. Treated the surface of GP for each group by two disinfectant solutions (NaOCL 2.5%, CHX 2%).Shear bond strength( S.B.S) test was calculate by digital universal testing machine.

Results: iroot sealer (group C) with NaOCL solutions at (2.5%) increase shear bond which were significantly different P≤0.05 from CHX at (2%) and fresh control cones. glassionemer sealer (group A) gaive the lowest measured.

Conclusions: NaOCL solutions at 2.5% left a many pitting investigated on the GP surface. Thus it increased the bond with sealer. The quality of the surface texture and mechanical properties of GP were unaffected by a CHX solution of 2%. Therefore, they were considering as the safe disinfectant solutions for GP cones.

Porosity, Solubility And Water Sorption Of Two Pulp Capping Materials

Jumana Abdulbari Abduljawad — Sun, 16 Oct 2022 00:00:00 +0000

Aim: The aim of this research was to examine physical attributes of two calcium silicate-based liner" Mineral trioxide aggregate (MTA), and resin modified calcium silicate (Theracal LC)".

Material and Methods: Ten discs of each tested material were prepared according to manufacturer instructions of each material, then pasted onto molds and allow to set then tested, porosity, water sorption and solubility were measured using mass measurements.

Results: Theracal LC has lower water sorption, solubility, and porosity than MTA (p<0.05).

Conclusion: Theracal LC has better physical properties than MTA.

Investigation the Effect of Different Oils as Separating Medium on Surface Roughness and Hardness of Tissue Surface of Flexible Denture Base

Shurooq Falih Hasan, Nidhal Sahib Mansoor, Israa Mohammed Hummudi — Sun, 16 Oct 2022 00:00:00 +0000

Background: Flexible dentures (thermoplastic material) are ideal alternatives to traditional methyl methacrylate dentures, since they not only give exceptional aesthetics and comfort, but also adapt to the continual movement of partially edentulous patients. During the manufacturing of acrylic denture base material, an effective separating medium must be used to separate the denture cleanly from the plaster to avoid direct contact between the denture base material and the mould surface.

Objective: The goal of this study was to investigate the effect of several types of oil (glycerin oil, olive oil, and black castor oil) on the surface roughness and hardness of flexible denture base material compared with cold-mould seal separating medium.

Effect Of Incorporation Of Either Neem Or Aloe Vera Powders On Tear Strength And Hardness Of Acrylic Soft Denture Liner Material

Abeer Adnan Noori Adnan Noori , Makarem Abdul Rassol Jaber — Sun, 16 Oct 2022 00:00:00 +0000

Aim of the study: The heat acrylic soft lining materials are far from ideal due to poor soften and weak tearing strengths. This cause some practical problems when testing the adherence of soft liners to denture bases. The study objective was to assess the effect of either Neem or Aloe Vera extracts on tear strength and hardness of heat acrylic soft denture lining material.

Materials and methods: Sixty acrylic soft liner specimens were prepared and divided into two main groups (30 specimens for tear strength test, 30 specimens for hardness test). These main groups sub-divided into three groups, each one consist of 10 specimens, according to incorporated material. The hardness specimens were fabrication with dimensions of (30 mm diameter × 3 mm thickness). The tear strength specimens were fabricated according to ASTM specification D-624. The scanning electron microscope (SEM) was used to estimate the distribution of either Neem or Aloe Vera particles within the soft liner. Energy dispersive X-ray spectroscopy (EDS) was used to analysis the elements of studied materials. Tear strength specimens were measured by utilizing universal Instron machine. Hardness specimens were measured by utilizing Shore A durometer. Statically all data were analyzed by using SPSS software.

Results: The outcomes showed non-significant differences (p>0.05) of all studied groups in tear strength and a highly significant (p<0.001) decrease in hardness of all studied groups in comparison with the control group.

Conclusion: Incorporation of Neem or Aloe Vera extracts powders showed slight increases in tear strength and highly significant decreases in hardness of soft liner material.

Modified CAD/CAM Wax: The Dimension Accuracy of Wax/Metal Copy Patterns

Baidaa Ahmed Abd Allah, Saja Ali Muhsin — Sun, 16 Oct 2022 00:00:00 +0000

Background: In dentistry, different researchers in various studies have tried various methods and techniques to reuse, recycle and manage the waste of dental materials. CAD/CAM wax could be recycled effectively without any degeneration of its original properties by refreshing with new materials using simple techniques. The objective of the current study is to evaluate the dimensional accuracy of the new modified machinable dental wax for CAD/CAM purposes.

Materials and Methods: In the present study three experimental blank discs were performed using the same technique for each type, but with different weight/compositions of dental and mineral waxes. A master die was scanned and designed for the crown copy patterns. Ten identical wax copings were milled for each experimental group (Type I, Type II, and Type III) to compare with the control (Dentify-Germany and Zotion™-China) discs. Wax patterns were cast into metal copies to assess the differences in accuracy values of the axial, proximal, and occlusal surfaces between the wax patterns and metal coping.

Result: Non- significant differences were noticed in the thickness accuracy between the wax pattern and the metal copy of the experimental discs of Type (I) and Type (II) that were manually produced compared to the commercial discs (P>0.05). While, Type III showed statistically significant differences were noticed between the wax and metal patterns, at different surfaces except in mesial surface (P<0.05).

Conclusion: Wax patterns fabricated using a new version of machinable wax produced by recycling some CAD/CAM wax with different fresh materials showed acceptable dimensional accuracy. Also, it seems to have few significant differences for CAD/CAM purposes in terms of patterns thickness than those obtained available and conventional wax^TM.

Estimation Of Color Change Of Maxillofacial Silicone Elastomer After Artificial Aging

Nebras Fadhil Alwan, Mohammed Abdul Hussein Hamid, Saja Ali Muhsin — Sun, 16 Oct 2022 00:00:00 +0000

Background: Silicone elastomers are the most widely used maxillofacial materials, however, it is far away from ideal and still progresses through many improvements for replacing the facial defect, maxillofacial prostheses need renewed as early as six months and can last up to 24 months. The color change is the most essential cause for remaking new prostheses.

Aim: The purpose of this study was to assess the color stability of maxillofacial elastomers throughout aging of about one year.

Materials and methods: Ten specimens were prepared from Room Temperature Vulcanazation (RTV) VerSilTal (VST-06) maxillofacial silicone and pigmented using rayon the flocking, the specimens were tested using the color-ometer device before and after subjecting to 46,146, and 317h accelerated weathering. The data were collected, analyzed, and compared using SPSS (V-18) via t-test, accomplished in confidence % 95 and significant P-Value of (p ≤ 0.05).

Results: Statistical t-test showed that the values of color changes differed among the tested groups (P≤ 0.05). The red wave value increased throughout weathering progress while the green and blue waves were decreased.

Conclusions: This study presented that the color degradation may take place in VST-06 VerSilTal (room temperature vulcanization) silicone elastomers after it was exposed to 46h accelerated weathering and this degradation increased over time.

Evaluation of Antimicrobial Activity of Newly Prepared Calcium Oxide Based Nanosealer Using Agar Diffusion Test

Raghad Adnan Al-Askary, Sawsan Hameed Ahmed — Sun, 16 Oct 2022 00:00:00 +0000

Aim of the study: The antimicrobial activity of a root canal sealer can increase the success rate of endodontic treatments. The key of antimicrobial properties of calcium based sealers laid in their composition and alkalinity. The invention and applications of newer materials are quintessential in every field especially in endodontics. This reality has led to growing interest in the use of biomaterials products that comprised of both mineral and organic components as those in the teeth. This study was performed to assess the antibacterial activity of newly prepared calcium oxide based nanosealer and compare the result with BioRoot sealer

Materials and methods: The CaO nanopowder was firstly prepared from calcinated cowrie seashell using ball milling and ultrasonic irradiation methods, and then the CaO nanopowder was used as the main component in the preparation of an experimental nanosealer powder part. After several pilot studies, the final formula for the prepared sealer that gave the best clinical sealer consistency and properties within the limits of ANSI/ADA Specification No.57/2012 was as the following. The powder part consists mainly of nano CaO (44%) in addition to glutamic amino acid, zirconium oxide (20nm), and silica oxide (15-20) nm, while the liquid part consists mainly from distilled water in addition to propylene glycol. The Antimicrobial activity of the prepared sealer was evaluated by agar diffusion test against E.faecalis and E.faecium, after 1, 2, 3, and 7 days of incubation at 37˚C. Zone of bacterial inhibition was measured and analyzed statistically using Independent sample t – test at (p=0.05) levels.

Evaluation Of Fusion Liquid Efficiency In Improvement Of Shear Binding Strength Of Synthetic Teeth To Thermo-Plastic Denture Material

Ruyaa Mohammed Ridha, Alaa Ezat abdul almajeed — Sun, 16 Oct 2022 00:00:00 +0000

Background: Due to increased chewing capability, one of the most common problems with dentures is that prosthetic teeth can come loose from the denture. The mechanical design of the connection between thermoplastic base materials and acrylic teeth has increased the problem of tooth debonding.

Objective: The current study was conducted to assess the shear bind strength of artificial teeth to thermoplastic resin utilizing fusing liquid and mechanical modifications (Alumin-ablasting, T. hole) of tooth ridge lap before and after 100 hours of accelerated ageing.

Materials and method: A total 120 maxillary central incisors have been chosen and grouped into 6 groups of 20 samples each, according to surface treatments. each group subdivided into before and after 100hrs according to artificial ageing (n=10). Shear bond strength test conducted by a universal measurement apparatus with crosshead speed 0.5mm / min. Data were statistically analyzed by one-way ANOVA and Tukey’s (HSD).

Results: Various surface treatments techniques significantly affected the shear bond strength with statistical high difference in mean bond strength after various surface treatments compared to the control group at (p < 0.001). Regarding surface treatment, Dual treatment of “alumina-blasting + fusion liquid” showed considerably elevated strength compared to alumina-blasting alone at (p < 0.001). also “T. hole +fusion liquid” treatment yielded a significant elevation in strength reading compared to T. hole alone at (p < 0.001). Great significant full in strength value was noted in all groups post 100hrs of artificial ageing process at (p < 0.001). The combined surface treatment revealed the lowest percentage reduction in SBS yielded in (T. Hole + fusion), (Alumina-blasting + fusion) than T. hole alone and alumina-blasting alone after 100hrs of artificial ageing process.

Conclusion: Surface treatment with T. hole + fusion liquid or alumina-blasting + fusion liquid enhanced SBS.

Influence of Optiglaze Material on Wear Resistance of Thermoplastic Resin

Najwah Yousuf Hameed, Maha Kareem Jabbar, Fatima Kadhim Ghadeer — Sun, 16 Oct 2022 00:00:00 +0000

Statement of problem: The wear resistance for flexible denture base material.

Purpose: The purpose of the study was to measure the wear resistance, of flexible acrylic denture base material; after being coated with light-polymerized glaze material.

Materials and methods: A total of (30) Thermoplastic resin specimens were divided into three groups according to the tests, each group consisted of 10 specimens (A) control group had no surface treatment, group (B) specimens surface was treated with Optiglaze materials after finishing and polishing; group (C) specimens was treated with Optiglaze materials after finishing only without polishing. Each specimen's weight loss was measured by comparing the weights before and after the wear test. Collected data were statistically analyzed using SPSS.

Results: The results of this study showed the higher mean values for wear resistance was registered by (C) group which was 8.7420,followed by (B) group which was 7.3210,while the lowest mean value related to the (A) group which was 7.0907.

Conclusion: Statistically wear values were lower for groups C & D and higher in group A.

Clinical implications: This study may be useful in assisting dental professionals and technicians in selecting the best polishing and coating material for dentures. Coating flexible acrylic resin denture materials with an Optiglaze to improve wear resistance.

Fracture strength and color stability of direct composite veneer using different materials

Mohammed Hamoudi Alsunboli , Haider Hasan Jasim — Sun, 16 Oct 2022 00:00:00 +0000

Aim: The purpose of this study was to compare the fracture resistance and color stability of three different restoration materials: Nano composite, flowable composite, and Nanohybid composite.

Materials and Methods: 45 removed human maxillary premolar teeth for orthodontic treatment were chosen. The teeth were divided into three experimental groups, each consisting of fifteen teeth: Direct composite veneers constructed of Nano - composites were employed to fix the teeth in Group A. (Z350 XT, 3M, USA). Group B: Flowable composite was used to directly veneer teeth (G-aenial Universal flo GC, Japan). Group C: Direct composite veneers made of Nanohybid composite were used to reconstruct teeth (G-aenial GC, Japan). Each tooth in groups A, B, and C had a copyplast template made prior to preparation using a 1 mm thick vacuum-pressed polyethylene plastic template. Standard preparations (intra enamel) were made for all teeth in experimental groups using ceramic veneer set burs. By injecting flowable composite via a hole formed in a copyplast template, Group B is restored. In Groups A and C, the buccal third (Bucco-palatally) of the template was filled with restorative material using a plastic tool before being positioned on the tooth and squeezed until it made contact with the unprepared tooth surface. All specimens' baseline colors were assessed using a spectrophotometer (Vita Easyshade, Ivoclar VivadentAG, Schaan, Liechtenstin). After baseline color measurement, each group of laminate veneers were subjected to immersion solutions (Tea bags, Lipton). Each specimen's color values were once again measured with the same spectrophotometer,

and the color change values (ΔE) were computed. Using a universal testing equipment, the fracture strength was evaluated.

Evaluation of the effect of different complete denture impression techniques on dental anxiety levels

Tameem Khuder Jassim, Ali Ehsan Kareem, Mohammed Adnan Alloaibi — Sun, 16 Oct 2022 00:00:00 +0000

Background: There are several different impression materials and techniques utilized in the fabrication of complete dentures.

Aim of the study: To determine the anxiety levels and the clinical procedure time for maxillary completely edentulous patients by the use of two different impression techniques; the use of a low-fusing green stick compound along with zinc oxide eugenol impression paste and addition silicone (polyvinyl siloxane) along with light body material.

Materials and Methods: Twelve maxillary edentulous subjects aged between 44 and 68 were randomly recruited for the study. After having the primary impression two special trays were fabricated for each patient; the first tray for the sectional border moulding group using impression compound along with ZOE final impression material (Group Z), and the second tray for the single-step border moulding technique using additional polyvinyl siloxane impression along with light body final impression materials (Group P). Comparisons between the two groups' procedure time and patients' visual analog scale (VAS) levels were made.

Results: The results showed that group P had significantly reduced the VAS compared to group Z 17.5±12.88 and 57.5±16.03, respectively (P=0.000). The mean total procedure times for single-step border moulding and sectional border moulding impression techniques were 12.25±5.16 and 27.5±4.00, respectively (P=0.000). Also, a significant association between the treatment groups and VAS scores was observed by the multiple regression analysis model (P=0.000).

Conclusion: As a result of the better patients' perceptions and reduced clinical time, the study findings suggested using a single-step border moulding technique in the upper arch together with additional vinyl silicon material.