Evaluation of the effect of systemic omega-3 polyunsaturated fatty acids on post-orthodontic relapse in a rabbit model
Asser
Gad
Orthodontic Department,Faculty of Dentistry, KafrElsheikh University.
author
Essam
Abdallah
Orthodontic Department, Faculty of Dentistry, Alexandria University
author
Nadia
ElHarouni
Orthodontic Department, Faculty of Dentistry, Alexandria University
author
Samia
Soliman
Orthodontic Department, Faculty of Dentistry, Alexandria University
author
text
article
2018
eng
Introduction: Long term stability is the major goal of orthodontic treatment. Hence, a series of safe pharmacological agents have been investigated to increase osteoblastic activity around orthodontically moved teeth to help in retention and stability of their correction. Aim of the study: To evaluate the effect of systemic administration of Omega-3 fatty acids on post-orthodontic relapse, and to histologically assess bone changes concurrent with its administration in rabbits. Materials and Methods: Thirty two adult albino male rabbits were divided equally and randomly into two groups. Each group received NiTi coil springs installed on mandibular first molars and ligated to anterior incisors. Omega-3 or Saline were given from day one of orthodontic tooth movement (OTM) till end of relapse period by oral gavage. After 21 days of active OTM, appliances were removed from both groups to allow orthodontic relapse (OR); then amount and percentage of relapse were measuredon days 21, 28 and 42. Animals were sacrificed for histomorphometric analysis of alveolar bone remodeling. Results: A significant difference in relapse percentage was found on the third week of OR with means (66.04 ± 6.01 %) and (75.22 ± 13.61%) for experimental and control groups, respectively. Histomorphometric analysis showed a significant reduction in the area of active bone-resorptive lacunae and a significant increase in newly formed bone area related to omega-3 group. Conclusions: A strong evidence of the osteoblastic simulative effect of Omega-3 had been found with decreased percentage of OR after OTM.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
1
10
https://eos.journals.ekb.eg/article_77151_ad8e1595ec99d0b45a6f04913ac8bbba.pdf
dx.doi.org/10.21608/eos.2018.77151
Comparative study of the rate of tooth movement between corticotomy and piezocision to facilitate en masse retraction in bimaxillary protrusion
Rehab
Khalil
Department of Orthodontics, Faculty of Dentistry, Beni-Suef University.
author
Waleed
Abbas
Oral Medicine and periodontology, Faculty of Dentistry, Ain Shams Universit
author
Waleed
Refaat
Faculty of Dentistry, Suez Canal University.
author
Ahmed
Ramadan
Faculty of Dentistry, Suez Canal University.
author
text
article
2018
eng
Objective: The aim of this study was to evaluate the rate of orthodontic tooth movement and the time needed for extraction space closure when corticotomy and piezocision were used to facilitate en-masse retraction in bimaxillary protrusion cases. Subjects and Methods: The sample of this study consisted of twenty subjects having Class I malocclusion with bimaxillary protrusion and requiring extraction of four first premolars and en-masse retraction of the anterior segments on both arches. The sample was randomly divided into two equal groups; group I:corticotomy was performed by using piezosurgery through flap reflection and group II: corticotomy was performed by using piezocision (flapless corticotomy). Study models were obtained just before surgery and in every month for 6 months after surgery to measure the rate of orthodontic tooth movement in both groups. After completing the en-masse retraction, the retraction time in months was recorded for the right and left sides and averaged. Results: Group I showed a statistically significant shorter retraction time than group II. Group I showed a statistically significant increase in the rate of tooth movement from the 2nd to the 5th month in the upper arch. For the lower arch, group I exhibited a significant increase in the rate of tooth movement in the 4th month. Conclusion: Corticotomy involving flap reflection showed a shorter retraction time and higher rates of tooth movement than piezocision during en-masse retraction.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
11
17
https://eos.journals.ekb.eg/article_77157_1053829c7967070a239d72484dac0b2f.pdf
dx.doi.org/10.21608/eos.2018.77157
Use of direct miniplate anchorage in conjugation with Forsus Fatigue Resistant device in class II growing females: a randomized controlled trial
Sherif
ElKordy
Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
author
Amr
Aboulezz
Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
author
Mona
Fayed
Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
author
Mai
Aboulfotouh
Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
author
Yehya
Mostafa
Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
author
text
article
2018
eng
Objective: The current randomized clinical trial aimed toevaluate the use of direct miniplates anchorage in conjunction with the Forsus Fatigue Resistant Device (FFRD) in treatment of skeletal Class II malocclusion. Material and Methods:48 Class II femaleswere randomly allocated to either the conventional Forsus (FFRD) group (16 patients, mean age 12.1±0.9years) Forsus with miniplates (FMP) group (16 patients, mean age 12.5±0.9 years), or untreated control group (16 subjects, mean age 12.1±0.9 years). After the leveling and alignment stage, miniplates were inserted in the mandibular symphysis in the FMP group. FFRD was inserted directly on the miniplates in the FMP and onto the lower wire in the FFRD group. The appliance was removed after reaching an edge to edge incisor relationship. Results: The effective mandibular length significantly increased in the FMP group only (4.05±0.78).no significant differences were found in the maxillary dimensions. The upper incisors retroclined in the FFRD and FMP groups with no difference between them. The lower incisors showed a significant proclination in the FFRD group (9.17±2.42) and non-significant retroclination in the FMP group. Soft tissue parameters were improved in both treatment groups. Conclusion: The use of miniplates with the FFRD was successful in increasing the effective mandibular length in Class II malocclusion subjects in the short term. The unfavorable proclination of the lower incisors was evident with the conventional FFRD but was successfully eliminated with the miniplates anchorage.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
19
38
https://eos.journals.ekb.eg/article_77159_de53a5a6a6a020825665b5ef1a8736b2.pdf
dx.doi.org/10.21608/eos.2018.77159
Buccal bone graft with surgically assisted rapid maxillary expansion in young adults: a cone beam computerized tomographic comparative study
Abdullah
Agniah
Al-Azhar University, Ministry of Health- Baniwalied- Lib
author
Ashraf
Bedwehi
Faculty of Dental Medicine (Boys) and Vice president for graduate studies and research, Al-Azhar University, Cairo, Egypt.
author
Hussein
AlKhalifa
Faculty of Dental Medicine (Boys), Al-Azhar University, Cairo, Egypt.
author
Wael
Mohandes
Faculty of Dental Medicine (Boys), Al-Azhar University, Cairo, Egypt.
author
text
article
2018
eng
Objectives: The aim of this study was to evaluate the dentoskeletal effect ofbuccal bone graft with buccal surgically assisted rapid maxillary expansion in young adults using cone beam computed tomography. Methods: The current randomized clinical study was conducted on a total sample of 21 orthodontic patients. The sample with mean age 20 Y. CBCTs were taken before and after orthodontic expansion. The patients were divided in to three groups, group I: consisted 7 patients treated with Hyrax expander,in conjunction with selected Buccopalatal corticotomy, group II:consisted 7 patients treated with Hyrax expander,in conjunction with selected Buccal corticotomy only, group III consisted 7 patients treated with Hyrax expander,in conjunction with selected Buccal corticotomy only followed by immediately placement of bone graft directly over the decorticated plate. Results: The results showed high significant increase in buccal bone thickness in the group III. On the other hand, there was a significant decrease increase in buccal bone thickness in groups I&II. Conclusion: The buccal bone graft with surgically assisted RME in young adult leads to increase in buccal bone thickness than the other technique without bone graft. The other two techniques without bone graft showed significant reduction in buccal bone thickness.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
39
46
https://eos.journals.ekb.eg/article_77144_f6b58e308c2286bc5caf1d67dbe1d2a7.pdf
dx.doi.org/10.21608/eos.2018.77144
Evaluation of ultimate tensile strength and surface roughness of NiTi and CuNiTi orthodontic archwires after recycling procedures
Yasmine
Sayed
Orthodontic Department, Faculty of Dentistry, Pharos University, Alexandria, Egypt*
author
Khaled
Aboulazm
Head of orthodontic department, Faculty of Dentistry, Pharos University, Alexandria, Egypt
author
Amal
Fahmy
Dental biomaterials department, Faculty of Dentistry, Pharos University, Alexandria, Egypt
author
text
article
2018
eng
Aim: The aim of this study is to evaluate and compare the influence of 2 types of sterilization/disinfection procedures on the tensile strength and surface topography of two orthodontic wires (Nickel-titanium (NiTi), and cupper Nickel-titanium (CuNiTi)). Materials and Methods: Sample comprised of 140 wires(100 new 0.017×0.025″ Ovoid rectangular, and 40 used 0.017×0.025″ Ovoid rectangular wires). They were randomly divided into 7 groups according to method and number of sterilization cycles,each group equally divided into 2 subgroups according to wire composition. Surface topography was examined with scanning electron microscope (SEM) and ultimate tensile strength (UTS) was tested using universal testing machine after sterilization and disinfection of the experimental groups. Result: SEM images revealed an increase in surface irregularities in CuNiTi and NiTi wires after sterilization. UTS of CuNiTi and NiTi wires after one cycle of autoclave sterilization procedure, or chemical sterilization for one or two cycles were not significantly different when compared with the control group. NiTi and CuNiTi archwires were affected after two cycles of autoclave sterilization.The mean UTS of clinically used and recycled archwires increased significantly when compared with the control group. Used and recycled archwires were affected considerably by autoclave sterilization Conclusion: Autoclave sterilization and chemical sterilization solution can be recommended for sterilization of orthodontic wires for one cycle.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
47
57
https://eos.journals.ekb.eg/article_77146_3d99f8da614027012cea01961ca62c90.pdf
dx.doi.org/10.21608/eos.2018.77146
The skeletal effect of two mandibular expander on the mandibular arch: a CBCT comparative study
Saif
Alsullei
Ministry of Health, Bani Waleed, Libya
author
AlDany
Mohammed
Orthodontic Department, Faculty of Dental Medicine (Boys) Al-Azhar University, Cairo, Egypt
author
Farouk
Hussein
Faculty of Dental Medicine (Boys), Al-Azhar University, Cairo, Egypt
author
Abdullah
Agniah
Ministry of Health, Libya
author
text
article
2018
eng
evaluate and compare the skeletal and dentoalveolar effects of two different mandibular expansion appliances using cone beam computed tomography. Methods: The current randomized clinical study was conducted on a total sample of 20 orthodontic patients. The samples mean age 13.4 ± 0.5. CBCTs were taken before and after orthodontic expansion. The patients were divided in to two groups, group I: consisted 10 patients treated with Williams mandibular expander, group II: consisted 10 patients treated with skeletal mandibular expander. Results: The results showed high significant increase in all linear and angular parameter of the two mandibular expansion groups except the mandibular body width and mandibular incisor inclination. On comparison of the mean differences of treatment variables between both groups of mandibular expansion, dental and skeletal effects were not statistically different (p < /em>˃0.05). In contrast, the interpremolar width, intercanine width, and arch perimeter were significantly increased in skeletal expander group than the Williams one.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
59
68
https://eos.journals.ekb.eg/article_77147_b9e5a81a56a124bd6bedf859ba3349a8.pdf
dx.doi.org/10.21608/eos.2018.77147
Evaluation of bone thickness changes associated with en masse retraction facilitated by corticotomy and piezocision using cone beam computed tomography
Rehab
Khalil
Department of Orthodontics, Faculty of Dentistry, Beni-Suef University
author
Waleed
Abbas
Oral Medicine and periodontology, Faculty of Dentistry, Ain Shams University.
author
Waleed
Refaat
Faculty of Dentistry, Suez Canal Universit
author
Ahmed
Ramadan
Faculty of Dentistry, Suez Canal Universit
author
text
article
2018
eng
Objective: The purpose of this study was to assess the bone thickness changes accompanied en-masse retraction assisted by corticotomy and piezocision by using CBCT (cone beam computed tomography). Subjects and Methods: Twenty subjects having Class I malocclusion with bimaxillary protrusion were included in the study. The patients were randomly divided into two equal groups; group I: flap group and group II: piezocision group. CBCT images were obtained before treatment (T1) and after space closure (T2). The alveolar bone thickness was assessed on the labial and lingual sides at the cervical, middle and apical thirds of the roots of the upper and lower anteriors. Results: Group I demonstrated a significant increase in the cervical labial bone thickness of the upper incisors while no significant change was detected in group II. Both groups revealed a significant decrease in the bone thickness of the cervical labial third of the lower anteriors. The labial bone thickness of the middle third showed no significant change except the upper left lateral incisor which revealed a significant decrease in group I. The labial bone thickness at the apical third showed no significant change in both groups. For both groups, the lingual bone thickness showed a significant decrease for all anteriors in the cervical and middle thirds. The apical third revealed no significant changes except the canines which showed a significant decrease in group I. Conclusion: En-masse retraction aided with either corticotomy or piezocision in bimaxillary protrusion cases showed significant bone thickness changes on the labial and lingual sides.
Egyptian Orthodontic Journal
Egyptian Orthodontic Society
1110-435X
54
v.
December 2018
no.
2018
69
78
https://eos.journals.ekb.eg/article_77149_9b3b9689024c0cf5f54771d68a430266.pdf
dx.doi.org/10.21608/eos.2018.77149