Clinical effects of removable functional Twin block appliance in the treatment of class II/1 malocclusion

Clinical effects of removable functional Twin block appliance in the treatment of class II/1 malocclusion

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Title: Clinical effects of removable functional Twin block appliance in the treatment of class II/1 malocclusion
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Article_Title: Clinical effects of removable functional Twin block appliance in the treatment of class II/1 malocclusion
Authors: Assistant Professor Delia Daragiu, Professor PhD Doina Lucia Ghergic
Affiliation: “Titu Maiorescu” University, Faculty of Dental Medicine
Abstract: Sagittal mandibular deficiency is the most common cause of skeletal class II malocclusion. Treatment objective is to stimulate sagittal mandible growth. Twin block functional appliance use is beneficial for shortening the time required for treatment. Case outline: a 12 year old boy was reffered to our Clinic by his dentist. Patient was subjected to the twin-block treatment for 9 month. Lateral cephalograms before and after the treatment were performed. Skeletal and dental changes were observed after treatment .A 12 year old Caucasian male presented with Class II/1 malocclusion , overjet of 10 mm. Treatment was commenced with TB functional appliance.The promotion of oral hygiene and fluoride use was performed because orthodontic treatment carries a high caries risk . Conclusions: TB was effective in correcting the molar relationship and reducing the overjet in class II/1 malocclusion
Keywords: twin block, malocclusion, functional appliance, prophylaxis
References: Bishara SE. Textbook of orthodontics. Philadelphia: WB Sounders Company; 2001. p.324-351
Azevedo A, Janson G, Henriques J, De Freitas M. Evaluation of asymmetries between subjects with class II subdivision and apparent facial asymmetry and those with normal occlusions. Am J Orthod Dentofac Orthop 2006; 129:376-83
Harvold EP, Vargervik K. Morphogenetic response to activator treatment . Am J Orthod . 1971; 60:478-90
Ahlgren J, Laurin C. Late results of activator treatment : a cephalometric study. Br J Orthod. 1976;3: 181-7
Pancherz H. A cephalometric analysis of skeletal and dental changes contributing to Class II correction in activator treatment. Am J Orthod. 1984; 85:125-34
Wieslander L, Lagerstrom L. The effect of activator treatment on class II malocclusions. Am J Orthod. 1979; 1:20-6
Sidlauskas A. The effects of the Twin block appliance treatment on the skeletal and dentoalveolar changes in Class II division 1 malocclusion. Medicina (Kaunas), 2005; 41(5), 392-400
Clark W.J “The Twin block technique . A functional orthopedic appliance system” Am J Orthod Dentofac Orthop. 93 (1988)1.
Sittipornchai A, Charoemratrote C, Mandibular growth stimulation produced by modified Twin blocks in skeletal class II retrognathic mandibular patients. Rajamangala University of Technology Isan. 23-24 December 2011, The 23rd National Graduate Research Conference , 276-281.
K O’Brien, J Wright, F Conboy, S Chadwick, I Connolly, P Cook, et al, “Effectiveness of early orthodontic treatment with the Twin block appliance : a multicentre, randomized, controlled trial. Part 2: Psychosocial effects” Am J Orthod Dentofacial Orhop 124 (2003) 488
Toth LR, McNamara JA, “Treatment effects produced by the twin block appliance and the FR2 appliance of Frankel compared with an untreated Class II sample” Am J Orthod Dentofac Orthop.116 (1999) 597
Lund DI, Sandler PJ, “The effects of Twin Blocks : a prospective controlled study”, Am J Orthod Dentofac Orthop. 113 (1998) 104
O’Brien K, Wright J, Conboy F, Sanjie Y, Mandall N, Chadwick S et al., “Effectiveness of treatment for Class II malocclusion with the Herbst or Twin block appliances: a randomized, controlled trial”, Am J Orthod Dentofac Orthop. 124 (2003)128O’Brien K, Wright J, Conboy F, Sanjie Y, Mandall N, Chadwick S et al., “Effectiveness of early orthodontic treatment with the Twin block appliance: a multicentre, randomized, controlled trial. Part 1: Dental and skeletal effects”, Am J Orthod Dentofac Orthop, 124 (2003) 234
Tulloch JFC, Philips C, Proffit WR, Benefit of early Class II treatment: Progress report of a two-phased randomized clinical trial. Am J Orthod Dentofacial Orthop. 1998; 113: 62-72
Keeling SD, et al., Anteroposterior skeletal and detal changes after early Class II treatment with bionators and headgear. Am J Orthod Dentofac Orthop. 1998; 113: 40-50
Trenouth MJ, Cephalometric evaluation of the Twin Block appliance in the treatment of Class II division 1 malocclusion with matched normative growth data. Am J Ortod Dentofac Orthop. 2000; 117: 54-59
Illing H, Morris DO, Lee RT, A prospective evaluation of bass , bionator and twin block appliances . Part 1: hard tissues, European Journal of Orthod, 1998; 20: 501-516
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Article Title: Clinical effects of removable functional Twin block appliance in the treatment of class II/1 malocclusion
Authors: Assistant Professor Delia Daragiu, Professor PhD Doina Lucia Ghergic
Affiliation: “Titu Maiorescu” University, Faculty of Dental Medicine
Abstract: Sagittal mandibular deficiency is the most common cause of skeletal class II malocclusion.
Treatment objective is to stimulate sagittal mandible growth. Twin block functional appliance use is beneficial for shortening the time required for treatment. Case outline: a 12 year old boy was reffered to our Clinic by his dentist. Patient was subjected to the twin-block treatment for 9 month. Lateral cephalograms before and after the treatment were performed. Skeletal and dental changes were observed after treatment .A 12 year old Caucasian male presented with Class II/1 malocclusion , overjet of 10 mm. Treatment was commenced with TB functional appliance.The promotion of oral hygiene and fluoride use was performed because orthodontic treatment carries a high caries risk . Conclusions: TB was effective in correcting the molar relationship and reducing the overjet in class II/1 malocclusion
Keywords: twin block, malocclusion, functional appliance, prophylaxis
References: Bishara SE. Textbook of orthodontics. Philadelphia: WB Sounders Company; 2001. p.324-351
Azevedo A, Janson G, Henriques J, De Freitas M. Evaluation of asymmetries between subjects with class II subdivision and apparent facial asymmetry and those with normal occlusions. Am J Orthod Dentofac Orthop 2006; 129:376-83
Harvold EP, Vargervik K. Morphogenetic response to activator treatment . Am J Orthod . 1971; 60:478-90
Ahlgren J, Laurin C. Late results of activator treatment : a cephalometric study. Br J Orthod. 1976;3: 181-7
Pancherz H. A cephalometric analysis of skeletal and dental changes contributing to Class II correction in activator treatment. Am J Orthod. 1984; 85:125-34
Wieslander L, Lagerstrom L. The effect of activator treatment on class II malocclusions. Am J Orthod. 1979; 1:20-6
Sidlauskas A. The effects of the Twin block appliance treatment on the skeletal and dentoalveolar changes in Class II division 1 malocclusion. Medicina (Kaunas), 2005; 41(5), 392-400
Clark W.J “The Twin block technique . A functional orthopedic appliance system” Am J Orthod Dentofac Orthop. 93 (1988)1.
Sittipornchai A, Charoemratrote C, Mandibular growth stimulation produced by modified Twin blocks in skeletal class II retrognathic mandibular patients. Rajamangala University of Technology Isan. 23-24 December 2011, The 23rd National Graduate Research Conference , 276-281.
K O’Brien, J Wright, F Conboy, S Chadwick, I Connolly, P Cook, et al, “Effectiveness of early orthodontic treatment with the Twin block appliance : a multicentre, randomized, controlled trial. Part 2: Psychosocial effects” Am J Orthod Dentofacial Orhop 124 (2003) 488
Toth LR, McNamara JA, “Treatment effects produced by the twin block appliance and the FR2 appliance of Frankel compared with an untreated Class II sample” Am J Orthod Dentofac Orthop.116 (1999) 597
Lund DI, Sandler PJ, “The effects of Twin Blocks : a prospective controlled study”, Am J Orthod Dentofac Orthop. 113 (1998) 104
O’Brien K, Wright J, Conboy F, Sanjie Y, Mandall N, Chadwick S et al., “Effectiveness of treatment for Class II malocclusion with the Herbst or Twin block appliances: a randomized, controlled trial”, Am J Orthod Dentofac Orthop. 124 (2003)128O’Brien K, Wright J, Conboy F, Sanjie Y, Mandall N, Chadwick S et al., “Effectiveness of early orthodontic treatment with the Twin block appliance: a multicentre, randomized, controlled trial. Part 1: Dental and skeletal effects”, Am J Orthod Dentofac Orthop, 124 (2003) 234
Tulloch JFC, Philips C, Proffit WR, Benefit of early Class II treatment: Progress report of a two-phased randomized clinical trial. Am J Orthod Dentofacial Orthop. 1998; 113: 62-72
Keeling SD, et al., Anteroposterior skeletal and detal changes after early Class II treatment with bionators and headgear. Am J Orthod Dentofac Orthop. 1998; 113: 40-50
Trenouth MJ, Cephalometric evaluation of the Twin Block appliance in the treatment of Class II division 1 malocclusion with matched normative growth data. Am J Ortod Dentofac Orthop. 2000; 117: 54-59
Illing H, Morris DO, Lee RT, A prospective evaluation of bass , bionator and twin block appliances . Part 1: hard tissues, European Journal of Orthod, 1998; 20: 501-516
*Correspondence: