@article { author = {El-Masry, Engy and Abdallah, Essam and Mowafy, Mohamed}, title = {Evaluation of the skeletal, dental and soft tissue effects of class III splints (clinical study)}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {1-25}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78871}, abstract = {Objective: The aim of this study was to evaluate the skeletal, dental and soft tissue effects of using Class III splints in the treatment of skeletal Class III malocclusion in growing patients. Materials and Methods: The appliance was tested on ten growing skeletal Class III patients with an anterior crossbite. Digital lateral cephalometric radiographs were taken before treatment and after crossbite correction. The pre and post radiographs were traced and skeletal, dental and soft tissue measurements were calculated with the use of the computer software FACAD. Evaluation of the effects was by statistical comparison of the pre and post treatment measurements. Results: There was a marked clinical improvement in the form of correction of the anterior crossbite and improvement of the patient’s profile, which raised the self esteem of the patients. The statistical analysis showed skeletal effects in the form of an increase in the ANB difference, Wits appraisal, mandibular plane to Frankfort horizontal plane angle and convexity angle, and a significant decrease in the occlusal plane to Frankfort horizontal plane angle. Dental effects were in the form of an upper incisor proclination, lower incisor retroclination, upper molar proclination and lower molar retroclination, an increase in the overjet and molar relation, and a decrease in the overbite. Soft tissue effects were in the form of a backward movement of the soft tissue chin and the lower lip, and a forward movement of the upper lip. Conclusion: Class III splints can be used in the treatment of growing skeletal Class III malocclusion that is due to a combination of maxillary retrusion and mandibular protrusion. It is more indicated though with deep bite cases, unless it will be followed with phase II extraction or with the use of high pull head gear.}, keywords = {Skeletal class III,Class III malocclusion,splint}, url = {https://eos.journals.ekb.eg/article_78871.html}, eprint = {https://eos.journals.ekb.eg/article_78871_5aa73ba8051db89a8c446945ea15e7ae.pdf} } @article { author = {Galal, Gasser and Bedair, Tamer and Ramadan, Ahmed}, title = {Effect of different ligation designs of self-ligating orthodontic brackets on friction}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {27-37}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78874}, abstract = {The purpose of this study was to investigate the effect of three different ligation designs of self-ligating orthodontic bracket systems (SLBs) on friction, under wet and dry conditions. Universal testing machine was used to slide forty brackets of four different bracket types (twenty passive self-ligating brackets PSLBs, ten active self-ligating brackets ASLB, and ten preadjusted brackets with conventional elastomeric O-ties) along 0.019×0.025 stainless steel (SS) wire segments at crosshead speed 8mm/min. Testing was done under dry and wet conditions. Statistical analysis of collected data revealed that all three tested SLB types displayed significantly lower frictional forces (FF) than conventional brackets with conventional elastomeric O-ties (CEL) under both dry and wet conditions. Both tested PSLB types displayed significantly lower frictional forces than tested ASLB type, under both dry and wet conditions.}, keywords = {Self-ligating brackets,Friction}, url = {https://eos.journals.ekb.eg/article_78874.html}, eprint = {https://eos.journals.ekb.eg/article_78874_08757c85f9f5763c7d1a4a8d3e60d068.pdf} } @article { author = {Zaher, Abbas and El Harouni, Nadia and El-Gayar, Mohamed}, title = {Debonding characteristics of self-adhesive resin cements used for orthodontic bonding relative to curing initiation time}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {39-54}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78875}, abstract = {Objective: The purpose of this study was to test whether the changing of the curing time initiation for two self-adhesive resin cements, Breeze (Pentron Clinical Technologies, Wallingford, USA) and Smartcem2 (Dentsply Caulk, International Milford, USA) can be used successfully to bond orthodontic brackets. Methods: Sixty extracted premolars were used in this study. The teeth were divided into 4 groups according to the cement used and its mode of curing. Breeze and Smartcem2were cured immediately and after 60 seconds after bracket placement. The brackets were tested in shear using a universal testing machine then the enamel surface was examined under 40x magnification to determine the amount of adhesive remnant. Six premolars from each group were then sectioned buccolingually into two halves. One half was chosen and gold coated to be examined under scanning electron microscope. Results: Analysis of variance for shear bond strength showed no significant differences among all the groups where the SBS ranged from 4.29 to 5.30 MPa. It was found that in both types of self adhesive resin cements most of the failure occurred at the bracket tooth interface. Scanning electron microscope showed deeper resin penetration for Breeze and Smartcem2 cured after 60 seconds with  a mean resin depth ranged from 3.25 :m to 4.51 :m respectively. No resin tags were observed in groups immediately cured. Conclusions: The SBS values of brackets cemented with self-adhesive resin cements were below the optimum levels for use in orthodontic bonding and the formation of short resin tags with delayed curing did not increase the shear bond strength of self-adhesive resin cements.}, keywords = {}, url = {https://eos.journals.ekb.eg/article_78875.html}, eprint = {https://eos.journals.ekb.eg/article_78875_2d29debf15c415e4f47f09e29b364517.pdf} } @article { author = {Murshid, Zuhair}, title = {Integrity of dental arch form: A review}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {55-67}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78879}, abstract = {The orthodontic literature shows diversity in adopting a reliable and definitive method for determining the shape and dimension of the dental arch form. Several visual, linear, geometric, and mathematical methods were employed in order to sort the form of the arch wire to fit a given dental arch. The consensus among researchers and orthodontists is that there is no general shape for the arch form and that the original mandibular arch form should be preserved. This concept has been translated through several vendors (Ortho CADs) for fabrication of the treatment arch wire for a patient, using pretreatment study cast. In addition, the Insigna and Sure Smile systems produced arch wires made-up for each patient. The method of Andrews and Andrews (2000) to determine the mandibular individual arch form (WALA ridge) seems promising and a recent study showed a positive correlation between this method and arch form shaping of treatment arch wire [jad1]s.}, keywords = {}, url = {https://eos.journals.ekb.eg/article_78879.html}, eprint = {https://eos.journals.ekb.eg/article_78879_8434fd83cc6db8e03ed34ba5676238d9.pdf} } @article { author = {Ismail, Hanan and Mousa, Hassan and Aboshelib, Moustafa and Al-Ammari, Mazen}, title = {In vitro shear bond strength study of new and reconditioned stainless steel orthodontic brackets}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {69-89}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78882}, abstract = {This study was conducted to compare the shear bond strength between new and reconditioned brackets using four reconditioning techniques on two bracket base designs. Eighty specimens were divided into two equal groups according to bracket base designs, mesh-base brackets group (Ormco), and laser-base brackets group (Dentaurum). In each group, new brackets were bonded to premolar teeth and the bond strength was recorded as a base line (control 1). Each group was further subdivided into five equal subgroups as follows: first subgroup, debonded brackets were removed, new brackets were bonded and the bond strength was recorded as (control 2), for the remaining four subgroups, debonded brackets were rebonded after reconditioning by 30 1m silanated sandblasting, 50 1m non silanated sandblasting, acid bath, and carbide bur and their bond strengths measured. Statistical analysis revealed that there was significant difference in the bond strength between the two bracket base designs used (P = 0.000) as laser-structured base brackets demonstrated higher bond strength (mean= 18.7±5.2 MPa) compared to mesh-base brackets (mean= 14.6±4.2 MPa). Moreover, there was significant difference (P = 0.000) in bond strength between the different reconditioning techniques. On the contrary, there was no significant difference (P = 0.840) on the interaction between the type of bracket base design and reconditioning technique as both designs of bracket base responded similarly to each reconditioning technique. In conclusion, bracket reconditioning using sandblasting technique was efficient and technically simple, and might provide cost reduction for orthodontists and patients alike.}, keywords = {}, url = {https://eos.journals.ekb.eg/article_78882.html}, eprint = {https://eos.journals.ekb.eg/article_78882_81e0e0924c6c7613ccb6f529543d8afc.pdf} } @article { author = {Ghoname, Nagwa}, title = {Clinical evaluation of chairside band and loop space maintainers}, journal = {Egyptian Orthodontic Journal}, volume = {43}, number = {June 2013}, pages = {91-104}, year = {2013}, publisher = {Egyptian Orthodontic Society}, issn = {1110-435X}, eissn = {2812-5258}, doi = {10.21608/eos.2013.78883}, abstract = {The use of space maintainer in the pediatric population has gained increasing attention from researchers. Chairside space maintainers are single setting technique and they are able to save practice time. The purpose of the study was to compare the clinical performance of chairside and conventional band and loop space maintainers. For this clinical trial, fifteen healthy children between the ages of five and eight years with premature loss of mandibular primary first molars were selected from Pedodontic Clinic, Faculty of Dentistry, Tanta University. For the selected children chairside band and loop was applied in one quadrant and conventional band and loop for the other quadrant. The chairside and conventional band and loop space maintainers were adjusted to fit the abutment tooth tightly and to rest against the anterior abutment tooth at the contact area. Both types were then cemented onto clean, dry abutment tooth with glass ionomer cement. All inserted space maintainers were evaluated for one year. The results showed that, the clinical success rate of chairside band and loop space maintainers was 80% and their mean survival time was11.25months. While conventional band and loop space maintainers showed 73.33% clinical success rate and10.75 months for the mean survival time. The differences, however, were not statistically significant (P>0.05). In conclusion: Chairside band and loop space maintainer can be considered a successful appliance for space maintenance.}, keywords = {}, url = {https://eos.journals.ekb.eg/article_78883.html}, eprint = {https://eos.journals.ekb.eg/article_78883_cd7d800babeda5f2b47fb02b7ed7e1e7.pdf} }