2024-03-28T16:24:33Z
https://eos.journals.ekb.eg/?_action=export&rf=summon&issue=11777
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
Study of the effect of a filled fluoride releasing enamel sealant versus fluoride varnish on initially demineralized enamel
Abbas
Zaher
Nadia
El-Harouny
Seham
Hanafy
Sherief
Abdel-Haffiez
Development of white spot lesions (WSL) adjacent to fixed orthodontic appliances is of fairly common occurrence. Such lesions can appear in patients' mouth within a span of 4 weeks. Aim: This randomized controlled in vitro study was conducted to compare the effect of the use of a filled, fluoride releasing, light cure enamel sealant (Pro Seal) versus fluoride varnish (Fluor Protector) on artificially induced white spots. Methods: Thirty human premolar teeth with artificially induced WSL were photographed using stereomicroscope. Specimens were treated with either fluoride varnish, Pro Seal or used as controls, and then were subjected to an acid challenge. Specimens were then photographed again using the stereomicroscope. Stereomicroscopic pictures were used to compare intensity and scoring of white spot lesions on the teeth before and after acid challenge. Results: The severity of WSL in the specimens treated with either Pro Seal or fluoride varnish remained the same. Diffusion of the WSL and cavitations of enamel surface were seen in the control group. No statistically significant difference was found between the Pro Seal and the fluoride varnish groups regarding their effect on progression of artificially induced white spot lesion when compared to the control group. Conclusion: Both Pro Seal and fluoride varnish showed significant effect on prevention of progression of artificially induced white spot lesions when compared to the control group.
2012
12
01
1
13
https://eos.journals.ekb.eg/article_78793_96b38fed92b63be5834f96ceb58dad6d.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
Three-dimensional evaluation of possible mandibular functional displacement in class II division 2 malocclusion subjects
Moataz
Fathallah
Walid
El-Kenany
Hanan
Ismail
Mohamed
Mowafy
Objective: The aim of this study is to evaluate the condyle-fossa relationship, using CBCT scanning before and after the correction of retroclined upper incisors in class II division 2 subjects, for the detection of possible mandibular functional displacement. Materials and Methods: The sample consisted of 11 Class II, division 2 subjects. Two CBCT scans were obtained for each subject; one before and one after leveling of the maxillary arch. Comparison of the joint space measurements was done for detection of condylar displacement. Results: Statistical Analysis of the sample showed statistically significant decrease in the anterior joint spaces, statistically significant increase in the superior joint space, the posterior joint spaces, and significant changes of the condylar position ratios and percentage. Conclusion: The correction of the maxillary Incisors retroclination of a Class II, Division 2 subjects lead to statistically significant change of the condylar position moving anteriorly and inferiorly. The clinical significance of these values is yet to be investigated.
Class II Division 2
CBCT
Joint spaces
Condylar displacement
2012
12
01
15
32
https://eos.journals.ekb.eg/article_78817_66ab1f9d1faf085323b9fbf56033c8fb.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
Prediction of root resorption and periodontal tissue changes associated with rapid molar intruder
Eman
Elsayed
Fatma
Abdel-Aziz
Mai
Shafik
Objective: Rapid molar intruder appliance (RMI), was used to close the anterior open bite by intruding upper and lower first molars. The aim of the present study was to investigate the amount of root resorption of first molars, as well as periodontal tissue changes associated with the application of RMI. Methods: Eleven female patients (mean age; 13-15 years) were included in the study. They had ANB angle average 5 degrees, with anterior open bite 1-3 mm. Root resorption and bone density were assessed using DBS win software, analyzing serial periapical radiographs of the first molars. Periodontal tissue changes were evaluated by measuring the probing depth, and sulcus bleeding and plaque indices. The records were compared with those of healthy, non- orthodontically moved first molars. Results: The upper first molar was intruded 1.9 mm, with 0.63 mm root resorption. While the lower molar intruded 0.5-0.7 mm, with root resorption of 0.7mm. No significant change in the periodontal variables was found. Conclusion: Rapid molar intruder is an efficient appliance for treating anterior open bite, causing minimal root resorption and maintaining the health of periodontium. The upper first molar is more favorable to be intruded, with significantly less apical root resorption, than the lower one.
2012
12
01
33
49
https://eos.journals.ekb.eg/article_78820_53e7966ded07da9b7df600b3d2792d0a.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
The relation between third molar agenesis and craniofacial morphology
Nagwa
Enany
Ahmed
El-Kalza
Fatma
El-Shikhy
This study was done to determine the existence of any relation between bilateral agenesis of maxillary or mandibular third molar with antero-posterior dimension of maxilla, mandible and skeletal pattern. 82 initial records of Egyptian patients with bilateral congenitally missing third molars, either in maxilla / mandible were selected. The records were divided into four groups 1- bilateral missing of upper third molars, 2-bilateral missing of lower third molars, 3- bilateral missing of upper and lower third molars, 4- control group without missing. Molars Orthopantomographs were used to determine the presence or absence of third molars. Lateral cephalometeric radiographs used to carry out a cephalometric analysis including linear, angular and proportional measurements. After collecting the data, it was analyzed by means of Anova and Tukey tests.The results obtained that mandibular plane angle were reduced, but not statistically significant. Whereas values of gonial angle in group III were significantly lesser than the control group (P =.006). For group III facial height was significantly less than the control group (P=.030).The conclusion suggests that agenesis of upper and lower third molars related to a reduced gonial angle, and decreased facial height. The study showed a relation between third molars agenesis and facial morphology.
2012
12
01
51
64
https://eos.journals.ekb.eg/article_78823_8cd6f1d8bdf63c27813a8fbd963fa969.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
Ratings of profile attractiveness after functional mandibular advancement
Nabeel
Abou Shamaa
Mohamed
Nadim
Considerations involving orthodontic treatment and facial esthetics have directed the investigation of the optimal treatment, especially in the correction of Class II, division 1 malocclusions, both esthetically and functionally.
The aim of this study is to determine whether the use of a Twin force bite corrector in combination with Edgewise mechanics yields a more esthetic facial profile than Edgewise treatment alone.
Methods: The present retrospective study compared matched two groups of adolescent patients, (total n=20) The first, treated with functional orthopedic therapy using a TFBC in combination with preangulated Edgewise appliances, (n=10). The second, matched group (n=10) was treated using standard Edgewise mechanics alone. A panel of ten orthodontic graduate evaluators investigated silhouettes of lateral photographs of perceived post treatment facial esthetics of Egyptian adolescents with Class II, division 1 malocclusions treated by one of the two methods. They scored each silhouette's attractiveness on a 100% visual analogue scale (modified VAS). Independent samples t test at 0.05 level of significance was used to compare the VAS scores. Results: the evaluators showed wide range of agreement among the two treated groups in selecting the most attractive profiles. The evaluation of pre/post treatment for each group and randomized post treatment of both goups for facial attractiveness showed insignificant difference statisticaly. Conclusion: TFBC treatment in combination with Edgewise mechanics has measurable benefits.
Facial profile
Twin Force Bite Corrector
functional orthopedic therapy
2012
12
01
65
74
https://eos.journals.ekb.eg/article_78825_c866484db2a7e311b5553f6c637b53a1.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
The effects of combined skeletal anchor plates and removable TMA traction springs in growing patients with maxillary deficiency
Hani
Eid
W
Elsayed
The purpose of this study was to evaluate the efficiency of bone anchored maxillary protraction (BAMP), using combined skeletal maxillary mini plates and a removable TMA traction spring appliance (TTSA), in patients with Class III malocclusion. Twenty cases (n=20) who were in prepubertal skeletal growth periods were used in the study. All subjects had skeletal and dental Class III malocclusions with maxillary deficiency, and anterior crossbite. The samples were categorized into two groups: Group A comprised 6 girls and 4 boys (n=10) (mean age, 11.91 years) received treatment using (BAMP). Three hundred fifty to 400 g of force per side was applied to the (TTSA) from the titanium miniplates (HUBIT, Korea) inserted in each infrazygomatic buttress of the maxilla. Total treatment time was 6.9±2.63 months. Group B comprised 7 girls and 3 boys (n=10) (mean age, 11.05 years) was the untreated control group. Lateral cephalometric films were obtained at the beginning (T1), at the end of treatment (T2) and at follow up 6 months later in both groups and analyzed with independent-sample t tests (P <0.05).The miniplates were able to withstand the orthopedic forces exerted during active treatment. Cephalometric findings showed significant sagittal measurements of the maxilla, as well as significant improvements in the mandibular skeletal measures at Point B, where SNA and SNB angles have improved significantly between T1 and T2 (p <0.001) without significant maxillary incisor movement. Statistically significant increases were observed in the vertical dimension, where rotation of the mandible and increased facial height were evident.Compared with growth of the untreated Class III subjects, it is suggested that this treatment approach can offer an advantage for correcting Class III patients with mild/moderate maxillary deficiency.
2012
12
01
75
93
https://eos.journals.ekb.eg/article_78826_a65e8aa6c71ca3e54f875ad34258c12f.pdf
Egyptian Orthodontic Journal
1110-435X
1110-435X
2012
42
December 2012
Microleakage under polycarbonate and metallic brackets bonded with resin-modified glass ionomer versus light cured composite resin
Dlia
Aly
Nazla
Tamish
Hanan
Ismail
Objective: An in vitro study to evaluate the microleakage at the occlusal and gingival margins of both polycarbonate and metallic brackets bonded with light-cured resin modified glass ionomer cement versus light cured composite.
Materials and Methods: 40 extracted sound premolars were divided into 2 groups. Group I was bonded with polycarbonate brackets (silkon M TM). 10 samples using light cure Fuji ortho (IA) and 10 samples using Trans bond XT (IB). Group II was bonded with metal brackets using both techniques (IIA&IIB). All samples were then subjected to thermo cycling. The root apices were sealed with sticky wax and the teeth were painted with 3 layers of nail polish leaving a 1mm window surrounding the bracket. Teeth were then immersed in 0.5% basic fuchsine dye solution for 24 hours at room temperature then washed under running water and sectioned longitudinally between the bracket wings into two halves using a low speed thin diamond disc under a stream of water. The extent of dye penetration was detected using a light stereomicroscope (x18 magnification) at both the occlusal and gingival areas of the brackets between both the enamel adhesive and the bracket adhesive interphases using soft imaging analysis. Descriptive statistics were computed as means and standard deviations of micro leakage values in different groups. Pooled micro leakage allowed the use of ANOVA, Tukey HSD test and the general linear model test at p<0.05. Significance level was set at 5%. Statistical analysis was done using SPSS version 17.Bar charts with Error bars were used for graphical presentation. Results: The gingival side of all groups exhibited higher microleakage compared with the occlusal side for both adhesive interfaces. All bracket and adhesive combinations displayed statistically significant differences in microleakage between the enamel-adhesive and adhesive-bracket interfaces at the occlusal and gingival sides of the brackets. When the adhesive systems were compared, the Resin Modified Glass Ionomer cement (RMGIA) showed more microleakage than the light cured composite resin between the different interfaces. The polycarbonate brackets with the addition of ceramic fillers showed more microleakage than metallic brackets. Conclusion: The overall comparison of the bonding system used revealed that no combination was found to be superior in their microleakage inhibition property, and polycarbonate brackets even by addition of ceramic fillers seemed that it was still inferior to the metallic brackets in the microleakage inhibition property.
2012
12
01
95
112
https://eos.journals.ekb.eg/article_78827_7246cc17bde4795013bc7280b312cf96.pdf