Vivek Kumar Thakur1, S M Londhe2, Prasanna Kumar3, Mohit Sharma4, Amit Jain4, Ishan Pradhan1. 1. Resident, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India. 2. Director General Dental Services & Colonel Commandant, O/o DGDS, 'L' Block, IHQ of MOD (Army), New Delhi 110010, India. 3. Professor, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India. 4. Associate Professor, Department of Dental Surgery & Oral Health Sciences, Armed Forces Medical College, Pune 411040, India.
Abstract
BACKGROUND: The purpose of the present study was to determine the airway changes in skeletal class II division 1 malocclusion patients with mandibular retrognathism, treated with Twin-Block (TB) appliance. METHODS: Airway assessment was carried for twelve patients (mean age 11.7 ± 1.1 years) who underwent myofunctional therapy using TB appliance for correction of skeletal class II division 1 malocclusion with mandibular retrognathism. Acoustic pharyngometry (AP) was used to assess and quantify the comparative changes in the upper airway, pretreatment and posttreatment. RESULTS: Data acquired was subjected to appropriate statistical analysis. The paired 't' test was used to compare pre-treatment (T0) and after the positive pterygoid response (T1). TB appliance increased mean minimum airway area by 0.28 ± 0.25 cm2 and mean airway by 0.47 ± 0.44 cm2 with 95% CI. Posttreatment minimum airway and mean area changes were found to be statistically significant (P-value<0.01). CONCLUSION: TB appliance therapy has a positive effect on upper airway and is beneficial for the treatment of sleep-related disorders associated with Class II division 1 malocclusion for achieving positive functional changes, esthetics, and healthier quality of life.
BACKGROUND: The purpose of the present study was to determine the airway changes in skeletal class II division 1 malocclusion patients with mandibular retrognathism, treated with Twin-Block (TB) appliance. METHODS: Airway assessment was carried for twelve patients (mean age 11.7 ± 1.1 years) who underwent myofunctional therapy using TB appliance for correction of skeletal class II division 1 malocclusion with mandibular retrognathism. Acoustic pharyngometry (AP) was used to assess and quantify the comparative changes in the upper airway, pretreatment and posttreatment. RESULTS: Data acquired was subjected to appropriate statistical analysis. The paired 't' test was used to compare pre-treatment (T0) and after the positive pterygoid response (T1). TB appliance increased mean minimum airway area by 0.28 ± 0.25 cm2 and mean airway by 0.47 ± 0.44 cm2 with 95% CI. Posttreatment minimum airway and mean area changes were found to be statistically significant (P-value<0.01). CONCLUSION: TB appliance therapy has a positive effect on upper airway and is beneficial for the treatment of sleep-related disorders associated with Class II division 1 malocclusion for achieving positive functional changes, esthetics, and healthier quality of life.
Authors: Ioannis A Tsolakis; Divya Venkat; Mark G Hans; Aurelio Alonso; J Martin Palomo Journal: Am J Orthod Dentofacial Orthop Date: 2016-10 Impact factor: 2.650
Authors: I Marshall; N J Maran; S Martin; M A Jan; J E Rimmington; J J Best; G B Drummond; N J Douglas Journal: Physiol Meas Date: 1993-05 Impact factor: 2.833