Al-Rafidain Dental Journal

AIMS: This study aims to estimate the efficacy of Ostene as bone hemostatic agent clinically and experimentally and their effect on the ease of operation in clinical dental practice. MATRIALS AND METHODS: For experimental part: Fifteen males rabbits were divided into three groups according to the time interval for hemostasis measurement, five rabbits in each group. Each group subdivides into other three groups according to study material "ostene, gelfoam, control". On femoral bone, three holes were made. After bleeding started, study material was placed inside holes, then a uniform piece of cotton was applied with gentle pressure, then hemostasis measured using the gravimetric method. For the clinical part: after complete extraction, a piece of study material was implanted inside the tooth socket and covered with uniform cotton for hemostasis, then hemostasis measured using the gravimetric method. RESULTS: For experimental part: study result revealed that the comparison between two local hemostatic agents (ostene and gelfoam) groups for hemostatic effect show Ostene has superiority effect over gelfoam in control bleeding at all interval times. Friedman test revealed a significant difference between study materials P =0.00 (P ≤ 0.05). For the clinical part: clinical measurement, ostene showed significant over gelfoam at 1min, 30 min While there were no significances between ostene and gelfoam at 5min,10min. Regarding visual analog scales for assessing bleeding and ease of operation, ostene, when comparing it with gelfoam, appeared better than gelfoam. CONCLUSIONS: Hemostatic effect of ostene is superior to gelfoam experimentally and after tooth extraction.

Aims: Different materials are used during endodontically treating of teeth as root canal sealers. Thus, this study was done to evaluate the sealing ability of three different types of root canal sealers on the apical part of the tooth. Materials and Methods: 50 sound human teeth were instrumented by using a rotary ProTaper nickel-titanium files under crown down technique. The samples were divided randomly into 3 groups (n=10), additionally two groups were used as +ve controls, first group usedEndofill sealer (PD product dentairesSA,Switzerland), and group two used Tagadseal sealer (technical general United kingdom),and the third group used AH plus sealer (Dentsply, Switzerland). All teeth were obturated using the single cone technique with the sealers, then the whole root surface was coated with two layers of aspecial type of nail varnish, except the apical 1 mm, then all teeth were placed into 2 % methylene blue dye liquid for one week at 37o C. After that they were removed from the dye , the nail varnish was removed. The positive controls (n=10) were left unfilled and coated as described earlier. Then the tooth was splited longitudinally and each half examined under a stereomicroscope with magnification: 10 X. A computer software was ued taken by a digital camera. Analyzing of data was done by One-Way Anova and Duncan,s Test analysis among the means of microleakage of the three types of sealers. All tests were computed at 5% significance level.Results: showed statistically significant difference among groups. Group 3 (AH plus) showed abtter seal among ( Tg and Endofill) groups while Tg and Endofill showed no significant difference between both. Conclusions: Under the conditions of this study, the AH plus sealer provided a better sealing ability than Endofill and Tagadseal sealers, but long term in vivo study is important to prove it.

Aims: To determine the effect of different curing times of a new method of polymerization by infrared radiation on the absorption and solubility in water of acrylic resin materials for denture base. Materials and Methods: In this study two types of denture base materials cured by heat were used (Traditional or Conventional and High Impact), the entire number of prepared specimens were (80) which grouped into: A- Control group: Consisted of two types of acrylic resin specimens polymerized by conventional water bath .B- Experimental group: Consisted of two types acrylic resin specimens polymerized by infrared radiation (IR) at different times of curing cycles. In each group; specimens were divided equally, some related to water sorption test others for solubility test. The mean of mass change of the material after they saturated with water and dried out of it was used, then analysis of data was done using one-way analysis of variance and Duncan test. Results: Statistically, no differences existed between Traditional and High Impact acrylic resin cured by water bath in water sorption and solubility tests. The mean values for previously mentioned tests in two types of acrylic resin had been decreased significantly by changing type of curing from conventional water bath to (IR) method. Conclusions: The selection of appropriate time and type of curing method may optimize the level of absorption and solubility in water for previously mentioned materials

Aims: to study the effect of interaction of dental stone with tap water and physically magnetized water on two periods of time 24h. and 12h to study the change in the physical properties of final product. Materials and Methods: We started prepair no. of control samples and other of samples interacted with physically magnetized water for two periods of time 24h and 12h, then we studied the liner setting expansion and compressive strength.. Results: results obtained from comparing control sample with that treated with physically magnetized water showed an increase in the compressive strength of physically magnetized group and decrease of linear setting expansion in comparison with that of control sample. Conclusion: Reaction of dental stone with physically magnetized water lead to change in some physical properties of dental stone

Aims: the current paper examines the topical effect of Coenzyme Q10 ointment in mice. Materials and Methods: Fifteen well male albino mice with equivalent age were designated for this research. The animals were divided into 3 clusters of five animals for each group. Group one worked as a control and was applied Vaseline ointment topically on skin wound. Groups; two and three were applied topically Coenzyme Q10 ointment 4%, 8% respectively on skin wound. These applications were repeated every day. The wound size and wound contraction ratios were measured in 1st, 4th, 7th days of the experimental procedure. Result: There were significant differences between groups in wound size and wound contraction ratios. The groups were treated with Coenzyme Q10 in different concentrations. They are better in rating the wound healing. Conclusion: The topical application of CoQ10 in different concentrations encourages the wound curing in the soft tissue of mice

AIMS: of this cross sectional study is to specify the occurrence of white spot lesion (WSLs) in patients with orthodontic attachment in Erbil, Iraq. MATERIALS AND METHODS: This cross-sectional study was carried out on 20 subjects (7 male – 13 female) their age ranged between 12-34 years old. During fixed orthodontic treatment each tooth in four quadrants was examined by naked eye to detect the occurrence of WSLs from the 1 month to 6 month of treatment duration. RESULTS: The prevalence of WSL according to age, gender, and duration of the orthodontic treatment. The mean age of male were 19.43 (S.D= 6.37) and the mean age of female were 19.00 (S.D= 7.37) ; but statistically calculated non- significant (P-value >0.05). In the first visit the mostly affected teeth are upper right canine, upper left canine, and upper left lateral incisor, In second visit the most affected teeth are upper left canine, upper left lateral incisor, and lower right canine. In the third visit the mostly affected teeth are upper left canine, upper left lateral incisor, and lower right canine, In the fourth visit the most affected teeth are upper left canine and upper left lateral incisor. The frequency of WSLs increased with each visit of orthodontic treatment, the maximum occurrence of WSLs was found in the sixth visit (21.25%) followed by fifth visit (21%), fourth visit (19.25%), third visit (16.25%), second visit (13.75%), and finally first visit (7.25%). The mean of all visit equal to 16.45%.CONCLUSION: 21.25% of patients in developing WSLs during orthodontic treatments were more attend in the upper than lower arch; they occurred most often on the upper left canine and upper left lateral incisor. There was statistically no significant male and female difference, females had a 65% of developing WSLs than males 35% (P-value <0.05).Key words: Coenzyme Q10; Wound healing; Wound contraction ratio

Aims: The aim of the current study is to investigate the effect of different concentrations of Ag nanoparticles on the compressive strength of type IV dental stone. Materials and Methods: Total specimens of this research are 66 specimens, it is divided into 3 groups, the first group is for wet strength , second group is for dry strength and third group is for scanning electron microscope analysis. 0.2%, 0.5% ,1.0% ,1.5% and 2.0% weight of Ag NPs incorporated into type IV dental stone then evaluated both wet and dry compressive strength and compared them with the control specimen and investigate it under SEM. The results are analyzed statistically by (Mean ± standard deviation, ANOVA and Duncan’s multiple range test). It is considered significant at p ≤ 0.05. Results: the compressive strength is decreased in comparison to the control specimens. This drop in strength value is not significant in wet strength, while significant in dry strength. SEM image exhibited the morphology of both stone crystals and silver NPs and exhibited the distribution of NPs inside the specimens. Conclusions: The study showed that, the incorporation of silver nanoparticles into dental stone reduced the compressive strength property of dental stone and NPs evenly distributed into dental stone

Aims: To investigate the effect of different concentrations of ZnO nanoparticles on the compressive strength of type IV dental stone. Materials and methods: Total specimens of this research was 66 specimens, it was divided into 3 groups, the first one for wet strength , second group for dry strength and third groups for scanning electron microscope analysis. 0.2%, 0.5% , 1.0% ,1.5% and 2.0% weight of ZnO were incorporated into type IV dental stone. The study evaluated both wet and dry compressive strength and compared them with the control specimen and investigate it under SEM. The results of the study were analyzed statistically by (Mean ± standard deviation, ANOVA and Duncan’s multiple range test) and the results were considered significant at p ≤ 0.05. Results: The compressive strength decreased in comparison to control specimens. This drop in strength value is not significant in wet strength, while significant in dry strength. SEM image exhibited the morphology of both stone crystals and zinc oxide NPs and exhibited the distribution of NPs inside the specimens Conclusions: The study showed that incorporation of zinc oxide nanoparticles into dental stone reduced the compressive strength property of dental stone and NPs evenly distributed into dental stone.

Aims:: Many different splinting techniques have been described in dental trauma articles. Wire-composite splint, Orthodontic splint, TTS splint, Resin splint, Kevlar/fiberglass splint (fiberglass), Self-etching and bonding material, Suture splint. We describe here a new technique for splinting traumatized teeth and alveolar bone. To evaluate the simplicity and reliability of cold-cured acrylic resin immediate splinting in the management of traumatized anterior teeth. Results: A total number of (46) patients with traumatized dental or dento-alveolar segment due to accident or operation were managed with immediate cold-cured acrylic resin splint without the need for anesthesia for fixation, the study carried out from January (2008–2014). Forty four dento-alveolar trauma patients, 2 patients following upper dento-alveolar osteotomy, 2 splints dropped down (2) days post-splinting, the splints removed (14-21) days. Conclusion: this new technique in the management of dento-alveolar trauma is a reliable, simple, easy, less technical, painless and less time consuming procedure

Aims: The aims of the research are to estimate the usefulness of two methods in reducing post-operative swelling following extraction of lower third molar teeth. Materials and Methods: This study included 30 cases had partially erupted lower third molar teeth of diverse surgical complexity. The patients were divided into two groups, in the first group, Kinesiology tape applied for 7 days, Diclofenac Na+ (Voltarin) 50mg tablet were given to the patients in the second group post operatively three times each day for seven days. Swelling was assessed by a ribbon gauge method. Assessments were done on first day of surgical management and on seventy-two hours and seven days afterward. Results: statistically significant difference were recognized for swelling values between two treatment groups on the 1st, 3rd and 7th day subsequent to surgical work. Conclusions: The use of Kinesiology tape have nearly the same effectiveness compared with Voltarin tablets in reducing post-operative swelling.