Assessment the Skeletal Changes of Modified Twin-Block Appliance with Clear Plates in Patients with Skeletal Class II Malocclusion
الملخص
This clinical trial aimed to evaluate the Skeletal Changes of Modified Twin-Block Appliance with Clear Plates in patients with skeletal class II malocclusion
The sample of the current study included 16 patients (7 females and 9 males) who had a class II malocclusion division I associated with a retracted lower jaw, and Available all inclusion criteria of the research, a cephalometric radiograph was taken in central occlusion position and timed in two different times T0 before the start of treatment and T1 after 12 months from the start of treatment, and young patients were included, upper and lower impressions were taken with alginate material in addition to a functional bite with red wax for all patients, then the Dental technician started to cast the impressions and started manufacturing the research device. Skeletal changes were studied before and after treatment through the (web ceph) program. This device consists of a soft clear plate with a thickness of 0.5 mm, on top of which an acrylic block is added that is a biting elevation level causing an anterior displacement of the lower jaw upon closing, similar to the elevation of the bite in the traditional device. The soft plate and the bite-enhancing acryl are pressed with a hard plate of 1 mm thickness.
The results of this study showed an improvement in the maxillomandibular relationship, where the value of ANB increased significantly from a statistical point of view in the second time of treatment.
This clinical trial showed the effectiveness of Modified Twin-Block Appliance with Clear Plates in bringing about Skeletal changes, as the ANB angle improved by (3.59) degrees.
References
1- BENNETT, J. 2006. Orthodontic Management of uncrowded Class II division 1 malocclusion in children, Mosby.
2- BISHARA, S. E. 2001. Textbook of orthodontics, Philadelphia, Pa., Saunders.
3- Behroozian, A. and L. Kalman (2020). "Clear Twin Block: A Step Forward in Functional Appliances."Dental Hypotheses 11(3): 91-94.
4- Alves, L., A. Mesaros, M. J. Ponces and M. C. F. Pollmann (2021). "Aesthetic evaluation of the need for orthodontic treatment – Perception among university students." medRxiv:2020.2012.2022.20244806
5- David S, O., Ahmed A, R., Waleed E, R. (2016). 'PREVALENCE OF DIFFERENT CLASSES OF
MALOCCLUSION AMONG DENTAL STUDENTS AT MOI UNIVERSITY IN KENYA', Alexandria Dental
Journal, 41(1), pp. 1-3. doi: 10.21608/adjalexu.2016.59162
6- Al-jabaa, A. H.; Aldrees, A. M. ANB, Wits and molar Relationship, DO They correlate in Orthodontic? Dentistry 2014,4 (6), 1.
7- RAKOSI, T., GRABER, T. & PETROVIC, A. 1997. Dentofacial orthopedics with functional appliances., St Louis, Mosby.
8- MCNAMARA JR, J. A. 1981. Components of Class II malocclusion in children 8–10 years of age. The Angle Orthodontist, 51, 177-202.
9- COZZA, P., BACCETTI, T., FRANCHI, L., DE TOFFOL, L. & MCNAMARA JR, J. A. 2006. Mandibular changes produced by functional appliances in Class II malocclusion: a systematic review. American Journal of Orthodontics and Dentofacial Orthopedics, 129, 599. e1-599. e12.
10- CURTIS, T. A., LANGER, Y., CURTIS, D. A. & CARPENTER, R. 1988. Occlusal considerations for partially or completely edentulous skeletal class II patients. Part I: Background information. The Journal of prosthetic dentistry, 60, 202-211.
11- SPALDING, P. 2001. Treatment of Class II malocclusions. Textbook of Orthodontics. Philadelphia, Pa: WB Saunders Co, 324-374.
12- سلطجي, همام. يوسف, محمد. علاقة نموذج النمو الوجهي بمقدار الدرجة القاطعة السهمية لدى مرضى الصنف الثاني (ماجستير), سورية, جامعة دمشق، 2010
13- سليمان, محمود. دراسة أولية حول نسب انتشار سوء الإطباق في مدينة حلب. مجلة بحوث جامعة حلب، سلسلة العلوم الطبية، العدد 35 , 1996
14- الصيرفي, عصام . المنجد, محمد قصي. الملامح الشعاعية السيفالوميترية لحالات الصنف الثاني. نموذج أول عند الأطفال السوريين في مرحلة الإطباق المختلط ,(ماجستير), سورية, جامعة تشرين ، 2009
15- المنجد, محمد قصي. انتشار سوء الإطباق في عينة من الأطفال السوريين، في فترة الإطباق المختلط المتأخر، مجلة بحوث جامعة تشرين، سلسلة العلوم الصحية ، العدد 1, 2009.
16- Khoja A, Fida M, Shaikh A. Cephalometric evaluation of the effects of the Twin Block appliance in subjects with Class II, Division 1 malocclusion amongst different cervical vertebral maturation stages. Dental Press J Orthod. 2016 Jun;21(3):73-84. doi: 10.1590/2177-6709.21.3.073-084.oar. PMID: 27409656; PMCID: PMC4944732.
17- BJöRK, A. & HELM, S. 1967. Prediction of the age of maximum puberal growth in body height. The Angle Orthodontist, 37, 134-143.
18- JACOBSON, A. & JACOBSON, R. L. 2006. Radiographic cephalometry: from basics to 3-D imaging, Quintessence Pub.
19- Radwan ES, Maher A, Montasser MA. Comparative Evaluation of Twin Block Appliance and Fixed Orthodontic Appliance in Early Class II Malocclusion Treatment: A Randomized Controlled Trial. J Contemp Dent Pract. 2022 Nov 1;23(11):1111-1121. doi: 10.5005/jp-journals-10024-3426. PMID: 37073934.
