Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Positional changes of the mandibular third molar in first molar extraction cases
1
9
79297
10.21608/eos.2007.79297
EN
Hanan A
Ismail
Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
0000 0002 2685 7075
Nadia M
El Harouni
Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
Journal Article
2007
07
30
This research was designed to study the changes in third molar position after extraction treatment in orthodontics. Pretreatment and post treatment cephalometric and panoramic x ray films belonging to 22 orthodontic patients age ranging between 14 to 20 years treated by first premolar extraction. Results of the study showed significant improvement in the mesioangular inclination of the third molars after treatment. There was also significant forward movement of the third molars after treatment. This study agrees with the expectations of some clinicians concerning improvement in third molar position after extraction treatment.
https://eos.journals.ekb.eg/article_79297_4bc58daf46de5f33a95c31028ecd0a76.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Dental arch symmetry in unilateral and bilateral posterior crossbite in Egyptian children
11
20
79294
10.21608/eos.2007.79294
EN
Saleh A
Saleh
Department of Orthodontics, Faculty of Dental Medicine, Al Azhar University, Assuit, Egypt
Journal Article
2007
07
27
The aim of this study was to compare between the symmetry of upper dental arch in unilateral and bilateral posterior crossbite in early mixed dentition. Thirty children with posterior crossbite in early mixed dentition were incorporated in this study; 18 patients with unilateral posterior crossbite, and 12 patients with bilateral posterior crossbite. Impressions were taken before orthodontic treatment. The control group consisted of 30 casts of children in the same age group with accepted normal occlusion. To assess the dental arches, two lines were recorded on the cast; Medial line and Transversal line perpendicular to each other. In the sagittal plane, perpendicular distances of reference points from the transverse line were measured. In the transverse plane perpendicular distances of reference points from the median line were measured. The results indicated that, in the unilateral posterior crossbite group, there exist clinically significant asymmetries in 33% of patients, i.e. 67% show asymmetry less than 2 mm. In bilateral posterior crossbite, the distal segment seems predominantly symmetrical while prominent asymmetries were found in anterior segment. The control group with relatively regular dental arch shows a certain degree of asymmetry which does not manifest itself clinically, significant asymmetries in anterior and posterior segment were not found. This study concluded that posterior crossbites in unilateral and bilateral cases are mainly due to symmetrical contraction of the upper dental arches rather than dental arches asymmetry.
https://eos.journals.ekb.eg/article_79294_f55a48eb5db74a11c5a54cf9fb2a712c.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Effect of chin cup therapy on the craniocervical angulation
21
29
79295
10.21608/eos.2007.79295
EN
Ghada
El Mehy
Department of Orthodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt
Journal Article
2007
07
27
Skeletal Class III is a common orthodontic problem, so, the effect of chin-cup therapy on craniocervical angulation was evaluated in this study. Eleven orthodontic female patients were selected with skeletal Class III malocclusion. Their ages ranged from nine to eleven years. Patients was treated by chin-cup appliance for about two years. Pre and post treatment cephalometrics was taken. Craniocervical angulation was recorded through certain cephalometric measurements. Statistical analysis revealed that, there was a significant changes of most of the measurements with increase of craniocervical angulation. It could be concluded that, chin-cup therapy could affect craniocervical angulation.
https://eos.journals.ekb.eg/article_79295_bcbcd4f6d880ffb8e9802d0665079c06.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
A newly constructed computer program for three dimensional analysis of tooth movement
32
47
79290
10.21608/eos.2007.79290
EN
Khaled M
Fawzy
Orthodontic and Pediatric Dentistry Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Noha E
Sabet
Orthodontic and Pediatric Dentistry Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Ibrahim M
Negm
Orthodontic and Pediatric Dentistry Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Journal Article
2007
07
14
The aim of this study went along two parallel ways; the first was to develop a new method for three dimensional 3D imagining of the dental cast, and the second was to evaluate it’s accuracy in analyzing the different tooth movements presented by three different palatal expanders, (A) Nitanium Palatal Expander 2 (NPE2) , (B) Compound Palatal Bar (CPB) and (C) Quad Helix (QH).Thirty healthy Egyptian girls each exhibiting unilateral or bilateral posterior crossbite, and required palatal expansion as part of their comprehensive orthodontic treatment were selected and then they were equally divided into one of three groups in a random fashion. These groups were classified according to the type of expander utilized: Group A: Ten girls utilizing the Nitanium Palatal Expander 2 (NPE 2), Group B: Ten girls utilizing the Compound Palatal Bar (CPB), Group C: Ten girls utilizing the Quad Helix (QH). Each subject was clinically examined, and an orthodontic diagnostic study cast was recorded. Both extraoral and intraoral photography were taken. In addition to panoramic and occlusal radiographs, lateral and posteroanterior cephalometric radiographs were obtained. A 3D computer program was specially designed for more accurate evaluation of the dental effects induced by the three types of maxillary expanders, For the rotation and extrusion: ANOVA test showed that there was a statistically significant difference between the three expanders. CPB expander showed the statistically significant lowest mean followed by NPE2. QH expander showed the statistically significantly highest mean. Regarding the buccal tipping: the ANOVA test showed that; there was a statistically significant difference between the three expanders. There was no statistically significant difference between (NPE2) and (CPB) expanders which showed the statistically significantly lowest means. QH expander showed the statistically significantly highest mean. It was concluded that: One of the imperative outcomes exclusive to this study was the development of a new method for 3D imaging of dental casts other than CT and laser scanning. The reliability of generating 3D dental images using photographic imaging of the dental casts for 3D tooth movement analysis has a great research potential in orthodontics because of its ability to yield accurate and reproducible data. An accurate and comprehensive description of the orthodontic tooth movements in various clinical situations is best assessed three dimensionally. The NPE2, CPB, and QH expanders are capable of expanding the maxillary dentition and alveolar process and are equally capable of correcting posterior crossbite.
https://eos.journals.ekb.eg/article_79290_87bc5499f31aef9a23a4a3d7cd2a2b7c.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Atomic force microscopic evaluation of light-cured filled sealant (Proseal) efficacy in preventing enamel demineralization in orthodontic patients
49
66
79291
10.21608/eos.2007.79291
EN
Suzan F
Shinaishin
Department of Oral Biolgoy, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Safaa A
Ghobashy
Department of Orthodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt
Journal Article
2007
07
27
White spot formation is an undesirable complication of orthodontic fixed appliances. It is due to enamel demineralization by organic acids resulted from accumulation of cariogenic bacteria around the brackets. This lesion can jeopardize the medical and esthetic benefits of orthodontic therapy. Pro Seal (a new highly filled light-cured resin) was claimed to protect the susceptible area adjacent to bonded attachment and require no patient compliance. Therefore, the purpose of this study was to investigate the efficacy of this new sealant in preventing enamel decalcification in vivo and compare its effect with varnish and unfilled sealant using Atomic force microscopy. Thirty two premolars with brackets on their buccal surfaces were classified according to treatment with different materials into four groups (n=8 for each one, 4 maxillary and 4 mandibular); Control (non-treated), Fluoride varnish, Unfilled sealant and Filled sealant (Pro Seal). After two months the brackets were debonded and the teeth were extracted and prepared for investigation. Each sample was scanned twice at two different scan areas (50 and 10µm) at the buccal cervical third of the crown. Images were recorded with slow scan rate; the mean roughness height and total surface area were calculated for each scan area. Tapping mode images and statistical analysis showed that Pro Seal treated samples had the least damaged enamel surface of all groups and the lowest mean of roughness height and total surface area. In conclusion, Pro Seal was the most effective prophylaxis technique in preventing enamel demineralization around orthodontic brackets.
https://eos.journals.ekb.eg/article_79291_bfec1f1818023f37dd03365f577e4787.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
The use of peer assessment rating index to compare treatment outcome in extraction versus non-extraction treatment
67
81
79298
10.21608/eos.2007.79298
EN
Hanan A
Ismail
Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
0000 0002 2685 7075
Journal Article
2007
09
01
The PAR index have been developed to provide a single summary score for all the occlusal anomalies which may be found in a malocclusion. The difference in scores between the pre-and post-treatment cases reflects the degree of improvement and, therefore the success of treatment. The index was used in this study to assess treatment outcomes in 20 extraction and 20 non extraction class I and II cases. Both groups showed good treatment outcomes however the percentage reduction in the PAR scores were higher in the non extraction group. The pretreatment PAR scores were significantly higher in the extraction group indicating more severe malocclusion at the start of treatment.
https://eos.journals.ekb.eg/article_79298_0ac73dd0901b7b664240c37f52d0b354.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Cephalometric evaluation of soft tissue profile changes following mandibular setback in Egyptian adults
83
92
79292
10.21608/eos.2007.79292
EN
Saleh A
Saleh
Department of Orthodontics, Faculty of Dental Medicine, Al Azhar University, Assuit, Egypt
Mohamed H
Warda
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
Journal Article
2006
08
22
scan area. Tapping mode images and statistical analysis showed that Pro Seal treated samples had the least damaged enamel surface of all groups and the lowest mean of roughness height and total surface area. In conclusion, Pro Seal was the most effective prophylaxis technique in preventing enamel demineralization around orthodontic brackets. labiale inferius; 88% (male) and 92% (female) at mentolabial sulcus; and 93% (male) and 103% (female) at soft tissue pogonion. After surgical setback of mandible, the ratios of soft to hard tissue changes are somewhat different between male and female, especially at labrale inferioris (Li) and soft tissue pogonion (PoG). The ratios of Li:li and PoG:Pog for male were smaller than for female. This suggests that the clinician should pay more attention to the depth of labiomental sulcus and new position of soft tissue pogonion when making surgical predictions for Egyptian adults with mandibular prognathism.
https://eos.journals.ekb.eg/article_79292_85bfe4e871b9f08fec70501b9a78d49f.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Comparative study of shear bond strengths between conventional etching and self etching primer
93
104
79293
10.21608/eos.2007.79293
EN
Medhat M
El Sakhawy
Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
Safaa M
Gaballa
Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
Ghada A
El Mehy
Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
R
Abd El Razek
Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
Journal Article
2007
07
27
This study was designed to compare shear bond strength durability of two etching techniques, conventional etching and self etching primer technique. Ninety extracted premolars was divided into two equal groups (group 1: etched with 35% Phosphoric acid and group 2: bonded with transbond plus self-etching primer, each group was further subdivided into three subgroups each of them containing fifteen teeth, at different storage time, for 24 hours, 30 days and 3 months. Universal testing machine was used to measure shear bond strength. T-test revealed that there was no significant difference in shear bond strength between the two etching techniques at 24 hours and 30 days, while showed a highly significant difference (P ≤ 0.01) at 3 months. For the three storage time, self etching primer showed less adhesive remaining on the teeth than that of Phosphoric acid etching. It could be concluded that self-etching primer provided shear bond strength Comparable to that of phosphoric acid, and less adhesive reminant than conventional etching technique.
https://eos.journals.ekb.eg/article_79293_52040a0fd06aae86817b5a53d9f4e886.pdf
Egyptian Orthodontic Society
Egyptian Orthodontic Journal
1110-435X
32
December 2007
2007
12
01
Effect of saliva contamination on the shear bond strength of the conventional adhesive and the self-etch primer/adhesive
106
120
79296
10.21608/eos.2007.79296
EN
Hatem S
El Din
Orthodontic Department, Faculty of Dentistry, Ain Shams Univeristy, Cairo, Egypt
Noha S
Sabet
Orthodontic Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Khaled M
Fawzy
Orthodontic Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
Journal Article
2007
07
15
Objective: The aim of this study was to evaluate the effect of saliva contamination on the shear bond strength of the conventional adhesive and the self-etch primer/adhesive. Material and Methods: Eighty human maxillary premolars were used in this study. They were randomly divided into 2 equal groups. In group I (N=40), Monolok2 conventional adhesive was used to bond brackets to the enamel surface. In group II (N=40), Brajen Unibond self-etch primer/adhesive was used to bond brackets to the enamel surface without acid etching. Each group was further subdivided into 4 equal subgroups according to enamel surface condition. Premolar brackets were bonded to the teeth according to the manufacturer instructions. Each specimen was mounted in an Instron Universal Testing Machine and tested to failure in shear mode. Results: Results revealed highly significant differences between subgroups in group I and group II. Conclusion: Conventional bonding system is less reliable in different saliva contamination conditions. The behavior of the material was less predictable than the self-etch primer/adhesive system.
https://eos.journals.ekb.eg/article_79296_e72767990bfb6a284faab1d01653e4a2.pdf