Autoclave sterilization of uncoated and coated NiTi wires and possible effects on the mechanical properties and surface roughness
Marwa
Shamaa
Lecturer of Orthodontics, Mansoura University, School of Dentistry, Mansoura, Egypt
author
text
article
2018
eng
Introduction: The frequency of patients’ exposure to infection and cross contaminated dental materials raises concern about sterilization of orthodontic arch wires. Objective: To explore if autoclave sterilization may modify the mechanical properties and surface roughness of NiTi arch wires or not. Methods: In the present study a total number of ninety maxillary superelastic NiTi wires with a diameter of 0.016” were used. They were equally divided into three groups. Group 1: uncoated NiTi wires (OrthoOrganizers), group 2: teflon coated NiTi wires (OrthoOrganizers), group 3: aesthetic NiTi wire (Jiscop). The three groups were examined using three point bending tests and profilometry before and after autoclave sterilization at 134°C for 18 minutes. Results: The three point bending test revealed statistically significant higher loading forces after sterilization at deflections of 1mm and 2 mm in uncoated NiTi wire and at 1mm in aesthetic NiTi wire. Significant lower loading forces were recorded at deflections of 2mm &3mm in Aesthetic wire. On the other hand, statistically significant lower loading forces after sterilization were detected in teflon coated NiTi wire. As regards the unloading forces, they were significantly lower after sterilization when deflected for 0.5mm, 1.5mm and 2.5 mm in Teflon coated Niti wire. A significant decrease in the elastic modulus was detected in all groups after autoclave sterilization and the profilometry revealed a significant decrease in the surface roughness of uncoated Niti group. Conclusion: Autoclaving causes significant changes in the mechanical properties and surface roughness of NiTi archwires.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1925
1931
https://edj.journals.ekb.eg/article_76670_953e3d0f011705522f929f7f6d4fc19a.pdf
dx.doi.org/10.21608/edj.2018.76670
Effect of Jet injection (INJEX) on pain perception among a group of pediatric dental patients
Sherief
El Tawil
Associate Professor of Pediatric Dentistry, Faculty of Dentistry, Cairo University
author
Norhan
El Dokky
Associate Professor of Pediatric Dentistry, Faculty of Dentistry, Cairo University
author
text
article
2018
eng
Background: Administering local anesthesia by injection is still the most common method used in dentistry. However, there is a constant search for ways to avoid the invasive and often painful nature of the injection and find a more comfortable and pleasant means of achieving local anesthesia before dental procedures. Aim: To evaluate the pain perception among a group of pediatric dental patients after using Jet injection (INJEX). Materials & Methods: The present study was conducted on 58 teeth in 39 children; 24 boys and 15 girls. The children included in the study were requiring local anesthesia for various dental procedures. Topical anesthetic gel was used, and then anesthesia was administered using the INJEX needleless device. Face pain rating scale (FRS) was used to assess the child’s pain perception during performing different dental procedures. Results: Statistical analysis revealed no statistically significant difference between pain scores with different treatment procedures. However, comparison between boys and girls revealed that boys showed statistically Significant higher pain score than girls during cavity preparation only. Conclusion: Local anesthesia using INJEX showed low pain perception during different dental procedures.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1933
1939
https://edj.journals.ekb.eg/article_76683_18507f8d5745da47f6da06535ff674cb.pdf
dx.doi.org/10.21608/edj.2018.76683
Is Dental Fear related to Clinical Consequences of Untreated Dental Caries in Children?
Hany
Saber
Lecturer, Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Cairo University.
author
Samah
Awad
Associate Professor, Pediatric Dentistry and Dental Public Health, Faculty Dentistry, Cairo University.
author
text
article
2018
eng
Purpose: To explore correlation between dental fear and consequences of untreated dental caries in children. Methods: Assessments of dental fear using Children’s Fear Survey Schedule-Dental Sub-scale, dental caries using decayed, missed and filled teeth index and consequences of untreated dental caries using pufa/PUFA index. Children (n= 250) were selected from clinics of Pediatric Dentistry and Dental Public Health Department, Cairo University. Results: Prevalence of pufa/PUFA>0 was 84.8% and 11.2% respectively. Mean score of pufa/PUFA was 3.83 and 0.20 respectively. Positive significant correlation between fear and dmft (primary dentition) was noted (P=0.003). Whereas, a negative significant correlation between fear (CSFSS-DS) and PUFA (permanent dentition) was revealed (P=0.021). On the other hand, no significant correlations between fear and pufa (primary dentition) (P=0.073) as well as DMFT (permanent dentition) were found (P=0.919). No significant association was noted between fear scores, gender and age. Conclusion: fear may have an impact on scores of caries and its consequences.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1941
1947
https://edj.journals.ekb.eg/article_76685_246542366a596193fc99a14f1bfcb121.pdf
dx.doi.org/10.21608/edj.2018.76685
Frictional resistance of different types of self-ligating brackets with different wire combinations
Mohamed
Nadim
Assistant Professor of Orthodontics, Faculty of Dentistry, Suez Canal University.
author
Sherif
Morcos
Assistant Professor of Orthodontics, Faculty of Dentistry, Suez Canal University.
author
text
article
2018
eng
The purpose of this study was to compare the effect of the mode of ligation on the frictional resistance of ceramic brackets and the effect of the bracket material on the frictional resistance whether it is static or kinetic. To achieve this one passive self-ligating ceramic bracket (Damon Clear 2), one active self-ligating ceramic bracket (Empower Clear) in addition to one passive self-ligating metal bracket (Damon Q) were used. These brackets were coupled with two sizes of stainless steel (SS) archwires (0.017 x 0.025-in and 0.019 x 0.025-in). A universal testing machine was used to pull the brackets along the straight distal end of the wire segments at a crosshead speed of 5 mm/min over a distance of 8 mm/min. The test was undergone under dry conditions. The results showed that the passive self-ligating brackets (PSLB) had significantly lower static friction (SF) and kinetic friction (KF) than the active self-ligating bracket (ASLB) with no significant differences between the ceramic and metal PSLB’s. Also inceasing wire size increased the SF and KF for the PSLB’s but did not affect the ASLB significantly.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1949
1954
https://edj.journals.ekb.eg/article_76688_8a8497e29aa85e00da566c327f71a03a.pdf
dx.doi.org/10.21608/edj.2018.76688
Relation between Dermatoglyphicsand Early Childhood caries in a group of Egyptian children
Moustafa
Matar
Lecturer of Pediatric Dentistry, Faculty of Dentistry, Pharos University, Alexandria, Egypt
author
text
article
2018
eng
Dental caries is a multifactorial disease with genetic base. Early prediction for high caries risk children can help in postulating an effective caries preventive measure. Dermatoglyphics is a promising valuable tool for preliminary examination in conditions with a speculated hereditary base. The aim of the investigation was to decide whether fingerprints as a genetic marker could be involved in the occurrence of dental caries. Sixty children aged between 36 to 71 months, divided into two groups of 30 children each. They were chosen from the outpatient clinic of the pediatric dentistry department at Pharos University. They were divided into two groups according to dental caries incidence: caries-free children and children with ECC and dmfs score > 5.The handprints of every child were taken and the type of dermatoglyphic pattern on fingertip of every digit was noted. The dmfs scores were recorded. SPSS software and test of proportions were used for the analysis. It was found that fingerprints of caries-free children demonstrated mostly loops pattern while whorls pattern was prevailing in the caries group.The difference in atd angle (angle is a part of the palm denoting the relative position of three triradii) revealed a significant difference between the two groups where caries group had the most minimal mean atd angle and the least total ridge count (TRC). This could be a cost-effective tool, that could be used in many field studies.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1955
1960
https://edj.journals.ekb.eg/article_76691_4e3f6568bda4aea997a11fa611dd5591.pdf
dx.doi.org/10.21608/edj.2018.76691
Histopathological Pulp Response to Platelet-Rich Plasma Pulpotomy in Primary teeth
Talat
Beltagy
Assistant Professor of Pedodontics, Faculty of Dentistry, Kafrelsheikh University, Egypt.
author
Nagwa
Ghoname
Professor of Pedodontics, Faculty of Dentistry, Tanta University, Egypt.
author
Doaa
Teiama
Lecturer of oral Biology, Faculty of Dentistry, Tanta University, Egypt
author
text
article
2018
eng
Background: To overcome the disadvantages of various synthetic-based biomaterials used in pulp therapy, the researchers are directed towards innovation of novel materials that are biologically compatible. Platelet-rich plasma (PRP) is considered one of the novel biologically-based autologous substitutes. Purpose: To evaluate histopathologically the pulp response to the platelet-rich plasma as a pulpotomy medicament in primary teeth. Materials and methods: A total of 30 healthy lower first primary molars and canines that indicated for serial extraction were selected for this experiment. PRP and formocresol pulpotomies were performed (12 teeth/each group), where the other 6 teeth were used as a control. Four teeth from each experimental group and one control were extracted at post-treatment intervals; 14 days, one and three months. The samples were prepared and the tissues’ sections were stained with Hematoxylin & Eosin for histopathological evaluation. Using ordinary light microscope, all sections were histopathologically analyzed blindly in terms of soft tissues organization, degree of inflammatory reaction, hyperemic changes, pulp necrosis and dentin bridge formation. Statistical analysis: All data were analyzed with the Mann-Whitney U-test and the probability level of significance was accepted at p < 0.05. Results: The overall histopathological results of pulp response to PRP were statistically significant in terms of soft tissue organization, degrees of inflammation, hyperemia, and pulp necrosis than formocresol (p < 0.05). Conclusion: Histopathologically, it was concluded that PRP had induced significantly a successful healing biologic response than synthetic formacresol; serving as a potent autogenous pulpotomy medicament alternative to formocresol.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1961
1972
https://edj.journals.ekb.eg/article_76693_dc063cde4bc55e97556582477ca9ba57.pdf
dx.doi.org/10.21608/edj.2018.76693
Is there A Relationship between finger print pattern and minerals content of the primary teeth enamel?
Wahdan
Elkwatehy
Lecturer of Pediatric, Dental Public Health and Preventive Dentistry, Faculty of Dentistry, Mansoura University, Egypt
author
Walid
Fouad
Associate Professor of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Cairo University, Egyp
author
text
article
2018
eng
Objectives: The present study aimed to evaluate the minerals content, calcium (Ca) and phosphorus (P) weight percent of primary teeth enamel in dependence to finger print pattern. Materials and methods: Thirty primary teeth (10 for each finger print pattern: whorl, loop and arch group). Enamel slab from each tooth was obtained, embedded and scanned by Scanning Electron Microscope - Energy Dispersive Analytic X-ray. Then the minerals weight percent of Ca and P from three different enamel areas (outer, middle, and inner) as well as the minerals content of enamel in relation to the three finger print patterns were quantified. One-way ANOVA test was used to compare among the three finger print patterns and the three enamel areas. Post- Hoc Tukey test was used for multiple comparisons and p value ≤ 0.05 was considered to be statistically significant. Results: The loop pattern has statistically significant higher weight percent of Ca followed by arch then whrol pattern, the arch pattern has the highest weight percent of P followed by loop then whrol pattern and the differences were statistically significant (p≤ 0.05). The highest weight percent of minerals (Ca + P) was observed in outer enamel area of loop pattern while the lowest percent was found in middle area of whrol pattern (53.860 ± 0.686 vs 51.600 ± 1.442). Regardless finger print pattern, there were no significant differences in Ca and P among the three enamel areas (p > 0.05). Conclusions: There were dependent differences observed in the three finger print patterns, Ca weight percent was the highest in loop pattern while phosphorus was the highest in arch pattern. However, no area dependent differences were observed in the three enamel areas.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1973
1980
https://edj.journals.ekb.eg/article_76696_026216f7f2b068e5933bcffd61bddb71.pdf
dx.doi.org/10.21608/edj.2018.76696
Comparison Between needle-less injection system and Conventional injection Technique to Perform anesthesia In Children: A Randomized Clinical Trial
Elpatal
Abd Ellatif
Lecturer of Pedodontics and Oral Health Department Al Azhar University Boy Cairo Egypt. Assistant Professor of
Pediatric Dentistry, Preventive Dental Science College of Dentistry Prince Sattam Bin Abdulaziz University KSA
author
text
article
2018
eng
Background: Needle-free injection technology was developed to reduce the pain. A comprehensive literature review was completed regarding needle-free injection technology and its applications, advantages over needle injections. This review describes needle-free injection technology involving the generation of force by using compressed gas in order to deliver anesthesia at very high speed through a nozzle. This review also describes injection methods that use a spring load jet injector. An overview of marketed products, recent trends and other needleless delivery systems is given. Needle-free injection technology is growing and has the potential to make the administration of anesthesia more efficient, safe and convenient Methods: Thirty patients recorded using a facial pain scale-revised (FPS-R) Results: The results indicated patients treated with needless injection system had less postoperative pain compared to patients treated with the conventional injection technique.Conclusion: needless injection system procedure would always be more accepted with minimal postoperative pain by the children patients than the conventional one.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1981
1985
https://edj.journals.ekb.eg/article_76697_0b3bbca3cb64f162077f1a919ebbe62b.pdf
dx.doi.org/10.21608/edj.2018.76697
Corticotomy-assisted slow maxillary expansion with bone allograft assessed with cone beam computed tomography in young adults
Eman
Elsayed
Lecturer of Orthodontics, Faculty of Dentistry, Cairo University.
author
Noha
Ghallab
Professor of Oral Medicine and Periodontology, Faculty of Dentistry, Cairo University.
author
Mohamed
Zayet
Associate Professor of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University
author
text
article
2018
eng
Introduction: There is low evidence regarding the effect of slow palatal expansion in the treatment of bilateral posterior cross-bite. In adults the treatment had always been directed to surgical maxillary expansion. Therefore, this study aimed at evaluating corticotomy-assisted slow palatal expansion using cone beam computed tomography (CBCT). Subjects and Methods: The study included six females, 19-20 years old, with bilateral posterior cross-bite and Class III malocclusion. CBCT was taken pretreatment (T0), immediately post-expansion (T1) and three months following the end of orthodontic treatment (T2). Four banded quad-helix appliance assisted with buccal corticotomy and bone allograft was used for expansion. The expansion was activated every two months. Fixed orthodontic appliance was performed to continue the treatment of the cases. CBCT was used to measure and record amount of expansion and tipping of premolars and first molars. The bone fenestrations were also recorded as scores. Data were statistically analyzed. Results: The bilateral posterior cross-bite was treated in 8.5 months. The amount of expansion increased significantly from T0-T1; 5.58±0.77mm, yet it was non-significant from T1-T2; 1.16±0.34mm. There was a significant increase in mean tipping angle from T0-T1 without a significant increase from T1-T2. Regarding buccal bone fenestrations, there was a significant increase from T1-T2 (1.59±1.19,1.79±1.18mm respectively). An inverse correlation was found between bone fenestration and cervical and middle buccal cortical bone thicknesses at T1 and T2. Conclusions: Corticotomy-assisted expansion with quad-helix was an efficient treatment modality of bilateral posterior cross-bite in young adults. Moderate bone fenestration was recorded at the end of expansion.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1987
1997
https://edj.journals.ekb.eg/article_76700_4bb1ab77df79fcb4c0fdf408b581c59a.pdf
dx.doi.org/10.21608/edj.2018.76700
A comparative study of the frictional forces between metallic bracket and ceramic bracket using conventional and unconventional elastomeric ligature
Mohamed
Salim
Lecturer of Orthodontics, Al-Azhar Unversity,Assiut Branch
author
Wesam El Dein
Gouda
Lecturer of Orthodontics, Al-Azhar Unversity,Assiut Branch
author
Osama
Hemdan
Lecturer of Orthodontics, Al-Azhar Unversity,Assiut Branch
author
text
article
2018
eng
Back ground Friction is defined as the force tangential to the common boundary of two bodies in contact that resists the motion of one relative to the other. frictional forces should be kept to a minimum so that lower levels of force can be applied to obtain an optimal biological response for effective tooth movement .The most popular bracket was stainless steel which presents in the form of cast or sintered stainless steel bracket, it The main disadvantage of stainless steel bracket is the inferior esthetics Aim the purpose of this study is to evaluate the frictional forces of stainless brackets and ceramic brackets with nickel titanium (Ni-Ti) and stainless steel (St.St) arch wires using conventional elastomeric ligature (CEL) and unconventional elastic ligature (UEL). Materials and Methods The samples including pre-adjusted metal bracket pre-adjusted ceramic bracket In this in vitro study, each bracket incorporating +17 torque and +4 angulation with 0.022” x 0.028” slot diminutions. The archwires used was 0.014” super elastic nickel titanium [SE NiTi] wire 0.019” × 0.025” stainless steel [St.St.] wire. Two types of ligation were used; conventional ligation (O-Tie) and unconventional ligation The frictional forces between bracket and wire is tested in a vertical planner by a tension load using Universal testing machine Each sample was inserted into the machine to measure the friction between wire and bracket in each case. The speed is 6mm/min and the traveling distance is 5mm. The measurements of all samples was performed under dry state Data were presented as mean and standard deviation (SD) values. One-way Analysis of Variance (ANOVA) was used for comparison between aging periods. Tukey’s post-hoc test was used for pair-wise comparison between the means when ANOVA test is significant. Student’s t-test was used for comparisons between two groups. The significance level was set at P ≤ 0.05. Statistical analysis was performed with SPSS 16.0® (Statistical Package for Scientific Studies) for Windows. Result Unconventional elastomeric ligature are able to produce significantly lower frictional forces compared with conventional elastomeric ligature (CEL) on conventionally ligated brackets the clinical advantages that arise from the use of Unconventional elastomeric ligature( UEL) is that they can be placed on every type of conventionally ligated brackets with considerable cost reduction the clinician can apply friction and low-friction mechanics simultaneously on the same archwire by using CEL and UEL only in particular segments. For example, during en masse space closure on a rectangular stainless steel archwire, UEL can be used in the posterior segments to reduce friction, while CEL is used in the anterior segment to maximize torque expression and control.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
1999
2006
https://edj.journals.ekb.eg/article_76704_19e3d44f65f94bb3630bf1af00b9594b.pdf
dx.doi.org/10.21608/edj.2018.76704
Frictional resistance of four self-ligating metallic brackets in combination with two diameters of stainless steel archwires
Adel
Rashid
Lecturer of orthodontics, Fayoum University, Fayoum, Egypt
author
text
article
2018
eng
Aim: This study was conducted to evaluate and compare the dynamic frictional resistance of stainless steel archwires in combination with 4 types of self ligating brackets (IOS ,3 M, American and Damon Q, brackets).Materials and methods : The sample of the study included forty eight pre-adjusted brackets for maxillary right canine (Roth prescription) with 0.022 × 0.028 inch slot. The sample was divided into eight groups, each one included six brackets. Groups 1 and 2 were IOS brackets, groups 3 and 4 were 3 M brackets, group 5 and 6 were American Orthodontics brackets while groups7 and 8 were Damon Q brackets .Groups 1, 3,5 and 7 were tested in combination with 0.016x0.022 inch diameter stainless steel arch wires while , groups 2, 4 ,6 and 8 tested in combination with 0.018 inch stainless steel arch wires. Universal testing machine with a new design simulating the oral cavity were used. The statistical mean and standard deviation of the kinetic frictional of eight groups were calculated to evaluate the significant difference between the groups during canine retraction.Essential results : showed that IOS brackets using 0.016x0.022 stainless steel arch wire produced the highest frictional force followed by 3M brackets in combination with 0.016x0.22 archwire while the Damon Q brackets using 0.018 stainless steel brackets produced least frictional force.Conclusions : Rectangular stainless steel archwires produced higher frictional resistance with all bracket types than the round ones. Damon Q brackets with round archwire produced the least frictional resistance.
Egyptian Dental Journal
The Egyptian Dental Association (EDA)
0070-9484
64
v.
Issue 3 - July (Orthodontics, Pediatric & Preventive Dentistry)
no.
2018
2007
2011
https://edj.journals.ekb.eg/article_76705_5c5b6feeeface1c97e8bfdd0e824bc66.pdf
dx.doi.org/10.21608/edj.2018.76705