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Register a new userEvaluation of the Efficacy of the Twin Block vs the Schwarz Double Plate in Skeletal Class II Correction: a Lateral Cephalometric Study
تقييم فعالية القطعة التوأمية بالمقارنة بصفيحة شفارتز المضاعفة في تصحيح الصنف الثاني الهيكلي: دراسة سيفالومترية جانبية
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Damascus University ورقة بحثية
Publication date
2012
fields
Dentistry
and research's language is
العربية
Authors
أحمد برهان( باحث )
Created by
Shamra Editor
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تعد المعالجة بالأجهزة الوظيفية لحالات الصنف الثاني الهيكلي من أهم الخيارات العلاجية في مرحلة الإطباق المختلط، إن الهدف من هذا البحث هو تقييم فعالية اثنين من أكثر الأجهزة الوظيفية شيوعاً في الممارسة التقويمية اليومية و هما جهاز صفيحة شفارتز المضاعفة و جهاز القطعة التوأمية فضلاً عن مقارنة فعالية هذين الجهازين.
functional treatment of skeletal class II malocclusion is one of the most important treatment options in mixed dentition. The aim of this research is to evaluate the effectiveness of two of the most popular functional appliances in daily orthodontic practice which are: Schwarz double plate and twin block, and to compare the effectiveness of these appliances.
References used
[Youssef M. The Prevalence of Dentofacial Disorders in Syrian Population. Damascus University Journal of Health Sciences. 1996; 12.(1.): 151-186 [Arabic
[Soliman M. A pilot study about prevalence of malocclusion in Aleppo city. Aleppo University Research Journal, Medical Sciences Series. 1996; 35: 165-177 [Arabic
Spalding P. Treatment of Class II Malocclusion. In Text Book OF Orthodontics. Bishara S. International edition. Philadelphia., W.B. Saunders Company: (2001); 324-374
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Since early Orthodontics, one of the main concerns is to correct Skeletal
Class II. For this Purpose they designed different functional appliances, and
performed many cephalometric studies to evaluate treatment results for
these appliances on dent
ofacial complex. Our clinical experience, show the
ability of treatment of preadolescents by advancement the mandible in
skeletal class II correction with Sliding Plates. and for this purpose, lateral
cephalometric study was performed to evaluate treatment results at
dentofacial complex. 19 preadolescents ages 11-14 years with skeletal class
II and mandibular retrognathism Sliding Plates consist of two separated
removable parts, the upper one has midpalatal expansion and vertical wire,
the lower is provided with anterior bite plane. The plates were used for 6-12
months. Lateral cephalograms were taken before treatment and
immediately after treatment. The results after treatment were compared
with the pretreatment measurements before treatment. After treatment,
advancement of the mandible and the parts of TMJ has been observed.
Thus, the use of sliding plates are useful to correct skeletal class II with
mandibular retrognathism, especially in cases associated with narrow upper
dental arch for children their ages do not permit the use of pre-functional
preparation, and additionally, in cases that require functional
rehabilitations.
Class II malocclusion is a common clinical problem among white Caucasian population and its transverse component is a critical aspect of a functional and stable occlusion. The size and shape of the arches have considerable implications in orthodontic
diagnosis and treatment planning, affecting the space available, dental esthetics, and stability of the dentition. Hence , it is important to study the alveolar arch width in this group of patients using the wide possibilities of cone beam computed tomography of evaluating real anatomy , true-to-scale images without distortions or superimpositions, and the selection of the desired sections.Objective:To evaluate the width of maxillary and mandibular alveolar arches in skelatal Class II adults compared to skeletal class I using cone beam computed tomography. Materials and methods: thirty-two subjects with skeletal Class II relationship and 10 subjects with skeletal Class I who were ordinary undergoing CBCT scan for non-orthodontics nor for otorihnolaryngology purpose were selected to measure the maxillary and mandibular alveolar width of first premolar and first molars.Independent samples’ t-test was calculated. Results:No statistically significant differences were found of alveolar widths between skeletal Class II and Class I subjects in both maxillary and mandibular widths of molar and premolar regions. Gender had no statistically significant effect in the results of the study. Conclusion :There is no differences in alveolar width between adults with skeletal Class II and Class I relationships, so the transverse discrepancy in skeletal Class II when exsists , it is more probably not originated from the alveolar base.
The purpose of this study was to evaluate the changes of
airway dimensions following functional and camouflage treatment in Class
II Division 1 malocclusion.
The purpose of this comparative study was to evaluate the correlation between
two radiographic methods used to evaluate skeletal maturation, hand-wrist analysis method and cervical
vertebrae analysis method.
Within the limits of this study, the ce
rvical vertebrae maturation method might mislead the
clinician when treating adolescent skeletal Class II patients at the pubertal growth spurt since it is not
correlated with hand wrist skeletal maturation method.
The aim of the study was to evaluate The relation between morphology of lips and incisors and mandibular rotation in adult class Ι individuals and to explore the gender dimorphism for these measurments. Material and methods True lateral cephalometri
c radiograph of the sample that comprises 32 females and 30 males aged 18-25 years and they possess class I skeletally and dentally. The data were analyzed using independent sample t test and Pearson correlation analysis. Results: In males interlabial angle negatively correlated with U1-NS and positively with U1-L1 Nasolabial angle and mentolabial angle positively correlated with (NS-GoMe, FH-GoMe, B, Bijork angles) Zangle and ULT/ULH negatively correlated with (NS-GoMe, FH-GoMe, B, Bijork angles) in Females lower lip inclination positively correlated with (NS-GoMe, FH-GoMe, B, Bijork angles).
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