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Bakr A M Rabie - One of the best experts on this subject based on the ideXlab platform.
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management of a class ii malocclusion with 2 phase herbst and fixed Appliance treatment a case report for the morthrcs ed examination
APOS Trends in Orthodontics, 2012Co-Authors: Kyoko Hibino, Ricky W K Wong, Bakr A M RabieAbstract:This case presentation demonstrates the 2 phase treatment of a13 years 11 months old Chinese boy with a Class II skeletal base with convex facial profile due to retrusive mandible and chin, using the fixed Functional Appliance and fixed Appliance approach.The Functional Appliance treatment of 1 year has demonstrated an improvement in the patient's facial profile and aesthetics which had addressed the patient's underlying problem. This was followed by the fixed Appliance treatment with the extractions of premolars to address the dental problem. The overall results has demonstrated the benefit of using Functional Appliances in improving facial profile in certain cases in a growing child that could be an option in the treatment of skeletal Class II cases. This case also demonstrated the management of the impacted upper second molars which was exposed using the laser. This case was one of the long cases presented at the Part II of the Membership of Orthodontics examination held by the Royal College of Surgeons of Edinburgh andthe College of DentalSurgeons of Hong Kong in November 2009 and a Gold medalwith full marks was awardedin the overall performance in the examination.
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evaluation of bone thickness around the mental foramen for potential fixation of a bone borne Functional Appliance a computer tomography scan study
Clinical Oral Implants Research, 2010Co-Authors: Abdullah A Alkalaly, Ricky W K Wong, L K Cheung, Shimanto K Purkayastha, Marc Schatzle, Bakr A M RabieAbstract:AIM: A mandible bone-borne Herbst Appliance (MBBHA) would avoid the proclination of the lower incisors that occurs with any teeth-borne Functional Appliance. But mapping of the bone characteristics at potential fixation areas around the mental foramen has not been carried out so far. The aim of this computer tomographic (CT) study was to evaluate bone thickness at specific positions around the mental foramen. MATERIAL AND METHODS: CT scans of 60 randomly chosen adult Hong Kong Chinese subjects (mean age 28 ± 6.3 years) were used to measure the bi-cortical bone thickness in the mandible in the mental foramen area. The thickness of buccal and lingual cortical and cancellous bone was assessed at the following locations: 10 mm (A10 mm) and 5 mm (A5 mm) anterior, 10 mm (P10 mm) and 5 mm (P5 mm) posterior, and 5 mm (Inf5 mm) below the mental foramen. RESULTS: The amount of buccal cortical bone thickness ranged between 1.89 mm, 10 mm anterior of the mental foramen, and 2.16 mm, 10 mm posterior to its location. At the A10 mm level, cortical thickness showed a marginal statistically significant difference between A5 and A10 mm. The total amount of bone thickness ranged from 10.19 to 12.06 mm. CONCLUSION: At the locations studied around the mental foramen, a mean bicortical bone thickness of 10-12 mm was measured. No large variation in the thickness was found between bicortical bone thicknesses in the measured locations around the mental foramen. Thorough evaluation on a case-by-case basis is advisable.
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does the degree of advancement during Functional Appliance therapy matter
European Journal of Ophthalmology, 2008Co-Authors: Bakr A M Rabie, Abdullah AlkalalyAbstract:The aim of this study was to assess the effect of varied degrees of mandibular advancement on condylar growth. Three hundred and thirty five 35-day-old female Sprague–Dawley rats were randomly divided into 10 experimental groups (n = 10) and five control groups (n = 5) for analysis of new bone formation and 10 experimental groups (n = 14) and five control groups (n = 14) for molecular analysis. The experimental animals were fitted with bite-jumping Appliance to advance the mandible 2 and 4 mm. The rats were sacrificed on days 3, 7, 14, 21, and 30. A computer-assisted image analysing system was used to assess the quantity of new condylar bone formation. Molecular analysis utilizing real-time reverse transcription–polymerase chain reaction was used to assess the different levels of mRNA expression of different growth markers in the condyle. One-way analysis of variance (ANOVA), with a Bonferroni multiple comparison test, showed significantly more newly formed bone in the 4 mm group compared with the 2 mm and control groups on days 21 and 30 (P < 0.05). Most of the examined growth markers demonstrated a significant increase during the 4 mm advancement (P < 0.05). Indian hedgehog (Ihh) mRNA showed a 7- and 5-fold change, parathyroid hormone-related peptide (PTHrP) a 5.2- and 3-fold change and type II collagen a 9.6- and 3.7-fold change in the 4 and 2 mm advancement groups, respectively. Varied degrees of mandibular advancement result in different quantities of new bone formation and levels of expression of growth members: Ihh, PTHrP, and type II collagen.
Nogueira Barreto - One of the best experts on this subject based on the ideXlab platform.
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dentoskeletal changes in class ii malocclusion patients after treatment with the twin block Functional Appliance
Dental Press Journal of Orthodontics, 2011Co-Authors: Helena Vieira, Marco Antonio De Oliveira Almeida, Portella Brunharo, Catia Abdo Quintao, Alexandre Trindade Simoes Da Motta, Sunny Yamaguche, Nogueira BarretoAbstract:OBJECTIVES: This prospective clinical study evaluated dentoskeletal changes in Class II malocclusion patients after treatment with the Twin Block Functional Appliance. METHODS: The treatment group consisted of 19 subjects (mean age 9.5 years) and the control group consisted of 19 subjects (mean age 9.9 years) situated before the pubertal growth spurt. Unpaired Student's t test showed the sample homogeneity at the beginning of the study. Initial (T1) and one year follow-up (T2) cephalometric radiographs were obtained for all subjects. Wilcoxon test and Mann-Whitney test were used to evaluate changes intra and inter groups from T1 to T2. RESULTS: A Class I molar relationship was achieved in 15 subjects of the TB group while no modification occurred in the control group. No significant effect was observed either in the maxilla or in the vertical pattern. A significant increase in total mandibular length and an anterior displacement of the mandibular position occurred in the treated group (p<0.05) as well as an overjet reduction, influenced by significant upper incisor retroclination and lower incisor proclination (p<0.05). CONCLUSION: Class II treatment with the Twin Block Appliance in Brazilian patients showed skeletal and dental effects, including increase in mandibular length and incisors compensation, respectively.
Vahid Rakhshan - One of the best experts on this subject based on the ideXlab platform.
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effects of sabbagh universal spring 2 fixed Functional Appliance on class ii 1 patients at their postpubertal peak growth period compared with the extraction method a randomized clinical trial
Journal of Orofacial Orthopedics-fortschritte Der Kieferorthopadie, 2017Co-Authors: Siamak Hemmatpour, Ali Mokhtar, Vahid RakhshanAbstract:Objective The aim of this study was to evaluate the therapeutic effects of the Sabbagh Universal Spring 2 (SUS 2) fixed Functional Appliance compared to the premolar extraction method in correcting class II/1 malocclusion in patients who had passed their peak of postpubertal growth (stages 4–6 of Cervical Vertebral Maturation Index).
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Effects of Sabbagh Universal Spring 2 fixed Functional Appliance on class II/1 patients at their postpubertal-peak growth period compared with the extraction method
Journal of Orofacial Orthopedics Fortschritte der Kieferorthopädie, 2017Co-Authors: Siamak Hemmatpour, Ali Mokhtar, Vahid RakhshanAbstract:Ziel Evaluiert werden sollten die Effekte einer Behandlung mit der SUS 2 (Sabbagh Universal Spring 2)-Feder im Vergleich mit denen einer Prämolarenextraktion im Oberkiefer zur Korrektur einer Klasse-II/1-Malokklusion bei Patienten nach dem pubertären Wachstumsschub [CVMI („cervical maturation index“)-Stadien 4–6]. Methoden Insgesamt 40 Klasse-II/1-Patienten wurden randomisiert in 2 Gruppen eingeteilt: eine mit SUS 2-Behandlung (7 männliche, 13 weibliche, 15,75 ± 1,02 Jahre), die andere mit Prämolarenextraktion im Oberkiefer (8 männliche, 12 weibliche, 15,40 ± 0,99 Jahre). Vor und nach Behandlung erstellte digitale Kephalogramme wurden mindestens zweimal ausgewertet. Zum Vergleich prä- und posttherapeutischer Messungen diente der gepaarte t- Test, zum Vergleich der Veränderungen nach Behandlung der t- Test für unabhängige Stichproben ( p ≤ 0,05). Ergebnisse Bei den im Folgenden aufgeführten Variablen war das Ausmaß der Veränderungen signifikant: ANB, Nasolabialwinkel, Mand1-ML, 1L-NB, anteriore und posteriore Gesichtshöhe, N-A-Pog, 1U-NF, 6L-MP, Ar-Go, OP-HP, A-B, A-Sn, B-Sm, APDI, NAPog, AB-NPog, POr-DOP, SN-OcP, POr-OcP, Wits, 1 l-APog, 1LMeLm, S-Go:N-Me, N-ANS-Pog, Ap1LAp1u-DOP, ANS-Cond, Pog-Cond, SS-Ls, A-N-Pog, Pog–Pog′, MeGoOcP, 1L-Npog, Go-Me, Go-Me:N-S, S-Me, Ls-(Sn-Pog′), Stms–Stmi, N′-Gn′, N′NsPog′, 6u-PTV, 1u-NA, FMIA und IMPA. Schlussfolgerungen Die SUS 2-Feder korrigierte eine Klasse-II/1-Malokklusion bei Patienten nach der pubertären Hauptwachstumsphase durch Hemmung des Oberkieferwachstums nach anterior, Vorverlagerung der Mandibula, Verringerung der nasolabialen und interinzisiven Winkel, Proklination der Schneidezähne, gesteigerte Gesichtshöhe und Rotation der Okklusalebene nach rechts. Eine Prämolarenextraktion dagegen verringerte den interinzisiven Winkel und führte zu einer Protrusion der Unterkieferschneidezähne. Die Weichteildicke dagegen veränderte sich nicht und es zeigte sich keine Rotation nach rechts in der Okklusalebene. Objective The aim of this study was to evaluate the therapeutic effects of the Sabbagh Universal Spring 2 (SUS 2) fixed Functional Appliance compared to the premolar extraction method in correcting class II/1 malocclusion in patients who had passed their peak of postpubertal growth (stages 4–6 of Cervical Vertebral Maturation Index). Methods In all, 40 class II/1 patients were randomized to receive SUS 2 application (7 males, 13 females, age 15.75 ± 1.02 years) or maxillary premolar extraction (8 males, 12 females, age 15.40 ± 0.99 years). Pre- and posttreatment digital cephalographs were traced at least twice. A paired t test was used to compare the pre- and posttreatment measurements. Treatment changes were compared using an independent samples t test ( P ≤ 0.05). Results The extent of change was significant in the following variables: ANB, nasolabial angle, Mand1-ML, 1L-NB, anterior and posterior facial heights, N-A-Pog, 1U-NF, 6L-MP, Ar-Go, OP-HP, A-B, A-Sn, B-Sm, APDI, NAPog, AB-NPog, POr-DOP, SN-OcP, POr-OcP, Wits, 1 l-APog, 1LMeLm, S-Go:N-Me, N-ANS-Pog, Ap1LAp1u-DOP, ANS-Cond, Pog-Cond, SS-Ls, A-N-Pog, Pog–Pog′, MeGoOcP, 1L-Npog, Go-Me, Go-Me:N-S, S-Me, Ls-(Sn-Pog′), Stms–Stmi, N′-Gn′, N′NsPog′, 6u-PTV, 1u-NA, FMIA, and IMPA. Conclusions SUS 2 corrected class II/1 malocclusion of patients in the postpubertal growth period by inhibiting the maxilla’s forward growth, advancing the mandible, decreasing the nasolabial and interincisal angles, proclining the incisors, increasing the facial height, and clockwise rotation of the occlusal plane. Extraction reduced the interincisal angle and protruded the lower incisors. However, it did not change the soft tissue thickness and did not cause a clockwise rotation in the occlusal plane.
Helena Vieira - One of the best experts on this subject based on the ideXlab platform.
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dentoskeletal changes in class ii malocclusion patients after treatment with the twin block Functional Appliance
Dental Press Journal of Orthodontics, 2011Co-Authors: Helena Vieira, Marco Antonio De Oliveira Almeida, Portella Brunharo, Catia Abdo Quintao, Alexandre Trindade Simoes Da Motta, Sunny Yamaguche, Nogueira BarretoAbstract:OBJECTIVES: This prospective clinical study evaluated dentoskeletal changes in Class II malocclusion patients after treatment with the Twin Block Functional Appliance. METHODS: The treatment group consisted of 19 subjects (mean age 9.5 years) and the control group consisted of 19 subjects (mean age 9.9 years) situated before the pubertal growth spurt. Unpaired Student's t test showed the sample homogeneity at the beginning of the study. Initial (T1) and one year follow-up (T2) cephalometric radiographs were obtained for all subjects. Wilcoxon test and Mann-Whitney test were used to evaluate changes intra and inter groups from T1 to T2. RESULTS: A Class I molar relationship was achieved in 15 subjects of the TB group while no modification occurred in the control group. No significant effect was observed either in the maxilla or in the vertical pattern. A significant increase in total mandibular length and an anterior displacement of the mandibular position occurred in the treated group (p<0.05) as well as an overjet reduction, influenced by significant upper incisor retroclination and lower incisor proclination (p<0.05). CONCLUSION: Class II treatment with the Twin Block Appliance in Brazilian patients showed skeletal and dental effects, including increase in mandibular length and incisors compensation, respectively.
Siamak Hemmatpour - One of the best experts on this subject based on the ideXlab platform.
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effects of sabbagh universal spring 2 fixed Functional Appliance on class ii 1 patients at their postpubertal peak growth period compared with the extraction method a randomized clinical trial
Journal of Orofacial Orthopedics-fortschritte Der Kieferorthopadie, 2017Co-Authors: Siamak Hemmatpour, Ali Mokhtar, Vahid RakhshanAbstract:Objective The aim of this study was to evaluate the therapeutic effects of the Sabbagh Universal Spring 2 (SUS 2) fixed Functional Appliance compared to the premolar extraction method in correcting class II/1 malocclusion in patients who had passed their peak of postpubertal growth (stages 4–6 of Cervical Vertebral Maturation Index).
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Effects of Sabbagh Universal Spring 2 fixed Functional Appliance on class II/1 patients at their postpubertal-peak growth period compared with the extraction method
Journal of Orofacial Orthopedics Fortschritte der Kieferorthopädie, 2017Co-Authors: Siamak Hemmatpour, Ali Mokhtar, Vahid RakhshanAbstract:Ziel Evaluiert werden sollten die Effekte einer Behandlung mit der SUS 2 (Sabbagh Universal Spring 2)-Feder im Vergleich mit denen einer Prämolarenextraktion im Oberkiefer zur Korrektur einer Klasse-II/1-Malokklusion bei Patienten nach dem pubertären Wachstumsschub [CVMI („cervical maturation index“)-Stadien 4–6]. Methoden Insgesamt 40 Klasse-II/1-Patienten wurden randomisiert in 2 Gruppen eingeteilt: eine mit SUS 2-Behandlung (7 männliche, 13 weibliche, 15,75 ± 1,02 Jahre), die andere mit Prämolarenextraktion im Oberkiefer (8 männliche, 12 weibliche, 15,40 ± 0,99 Jahre). Vor und nach Behandlung erstellte digitale Kephalogramme wurden mindestens zweimal ausgewertet. Zum Vergleich prä- und posttherapeutischer Messungen diente der gepaarte t- Test, zum Vergleich der Veränderungen nach Behandlung der t- Test für unabhängige Stichproben ( p ≤ 0,05). Ergebnisse Bei den im Folgenden aufgeführten Variablen war das Ausmaß der Veränderungen signifikant: ANB, Nasolabialwinkel, Mand1-ML, 1L-NB, anteriore und posteriore Gesichtshöhe, N-A-Pog, 1U-NF, 6L-MP, Ar-Go, OP-HP, A-B, A-Sn, B-Sm, APDI, NAPog, AB-NPog, POr-DOP, SN-OcP, POr-OcP, Wits, 1 l-APog, 1LMeLm, S-Go:N-Me, N-ANS-Pog, Ap1LAp1u-DOP, ANS-Cond, Pog-Cond, SS-Ls, A-N-Pog, Pog–Pog′, MeGoOcP, 1L-Npog, Go-Me, Go-Me:N-S, S-Me, Ls-(Sn-Pog′), Stms–Stmi, N′-Gn′, N′NsPog′, 6u-PTV, 1u-NA, FMIA und IMPA. Schlussfolgerungen Die SUS 2-Feder korrigierte eine Klasse-II/1-Malokklusion bei Patienten nach der pubertären Hauptwachstumsphase durch Hemmung des Oberkieferwachstums nach anterior, Vorverlagerung der Mandibula, Verringerung der nasolabialen und interinzisiven Winkel, Proklination der Schneidezähne, gesteigerte Gesichtshöhe und Rotation der Okklusalebene nach rechts. Eine Prämolarenextraktion dagegen verringerte den interinzisiven Winkel und führte zu einer Protrusion der Unterkieferschneidezähne. Die Weichteildicke dagegen veränderte sich nicht und es zeigte sich keine Rotation nach rechts in der Okklusalebene. Objective The aim of this study was to evaluate the therapeutic effects of the Sabbagh Universal Spring 2 (SUS 2) fixed Functional Appliance compared to the premolar extraction method in correcting class II/1 malocclusion in patients who had passed their peak of postpubertal growth (stages 4–6 of Cervical Vertebral Maturation Index). Methods In all, 40 class II/1 patients were randomized to receive SUS 2 application (7 males, 13 females, age 15.75 ± 1.02 years) or maxillary premolar extraction (8 males, 12 females, age 15.40 ± 0.99 years). Pre- and posttreatment digital cephalographs were traced at least twice. A paired t test was used to compare the pre- and posttreatment measurements. Treatment changes were compared using an independent samples t test ( P ≤ 0.05). Results The extent of change was significant in the following variables: ANB, nasolabial angle, Mand1-ML, 1L-NB, anterior and posterior facial heights, N-A-Pog, 1U-NF, 6L-MP, Ar-Go, OP-HP, A-B, A-Sn, B-Sm, APDI, NAPog, AB-NPog, POr-DOP, SN-OcP, POr-OcP, Wits, 1 l-APog, 1LMeLm, S-Go:N-Me, N-ANS-Pog, Ap1LAp1u-DOP, ANS-Cond, Pog-Cond, SS-Ls, A-N-Pog, Pog–Pog′, MeGoOcP, 1L-Npog, Go-Me, Go-Me:N-S, S-Me, Ls-(Sn-Pog′), Stms–Stmi, N′-Gn′, N′NsPog′, 6u-PTV, 1u-NA, FMIA, and IMPA. Conclusions SUS 2 corrected class II/1 malocclusion of patients in the postpubertal growth period by inhibiting the maxilla’s forward growth, advancing the mandible, decreasing the nasolabial and interincisal angles, proclining the incisors, increasing the facial height, and clockwise rotation of the occlusal plane. Extraction reduced the interincisal angle and protruded the lower incisors. However, it did not change the soft tissue thickness and did not cause a clockwise rotation in the occlusal plane.
