OBJECTIVE: To test the hypothesis that long-term use of an oral appliance (OA) does not cause changes in the occlusal contact area (OCA). MATERIALS AND METHODS: Baseline and follow-up treatment study models were obtained for 45 patients with obstructive sleep apnea who had been using an OA for 4 or more days/week for more than 5 years. Study models in centric occlusion, with an inserted pressure-sensitive sheet, were loaded in compression. An image scanner was used to evaluate OCA. RESULTS: A significant change in total OCA was identified in 39 patients (86.7%): a decrease in 26 (66.7%) and an increase in 13 (33.3%) patients. Regional changes >5% were observed in >90% of patients in each of the three regions. In the molar and premolar regions, 24 (53.3%) and 27 (60.0%) of the patients showed an OCA decrease, while only 16 (35.6%) and 15 (33.3%) showed an increase. Conversely, for the anterior region, more increases (24 patients-53.3%) than decreases were identified. CONCLUSION: The hypothesis is rejected. Long-term OA therapy resulted in dramatic changes of occlusion, suggesting that monitoring of occlusal changes is required.
OBJECTIVE: To test the hypothesis that long-term use of an oral appliance (OA) does not cause changes in the occlusal contact area (OCA). MATERIALS AND METHODS: Baseline and follow-up treatment study models were obtained for 45 patients with obstructive sleep apnea who had been using an OA for 4 or more days/week for more than 5 years. Study models in centric occlusion, with an inserted pressure-sensitive sheet, were loaded in compression. An image scanner was used to evaluate OCA. RESULTS: A significant change in total OCA was identified in 39 patients (86.7%): a decrease in 26 (66.7%) and an increase in 13 (33.3%) patients. Regional changes >5% were observed in >90% of patients in each of the three regions. In the molar and premolar regions, 24 (53.3%) and 27 (60.0%) of the patients showed an OCA decrease, while only 16 (35.6%) and 15 (33.3%) showed an increase. Conversely, for the anterior region, more increases (24 patients-53.3%) than decreases were identified. CONCLUSION: The hypothesis is rejected. Long-term OA therapy resulted in dramatic changes of occlusion, suggesting that monitoring of occlusal changes is required.
Authors: Cristina V Perez; Reny de Leeuw; Jeffrey P Okeson; Charles R Carlson; Hsin-Fang Li; Heather M Bush; Donald A Falace Journal: Sleep Breath Date: 2012-04-04 Impact factor: 2.816
Authors: Surendra K Sharma; Vishwa Mohan Katoch; Alladi Mohan; T Kadhiravan; A Elavarasi; R Ragesh; Neeraj Nischal; Prayas Sethi; D Behera; Manvir Bhatia; A G Ghoshal; Dipti Gothi; Jyotsna Joshi; M S Kanwar; O P Kharbanda; Suresh Kumar; P R Mohapatra; B N Mallick; Ravindra Mehta; Rajendra Prasad; S C Sharma; Kapil Sikka; Sandeep Aggarwal; Garima Shukla; J C Suri; B Vengamma; Ashoo Grover; V K Vijayan; N Ramakrishnan; Rasik Gupta Journal: Lung India Date: 2015 Jul-Aug
Authors: Surendra K Sharma; Vishwa Mohan Katoch; Alladi Mohan; T Kadhiravan; A Elavarasi; R Ragesh; Neeraj Nischal; Prayas Sethi; D Behera; Manvir Bhatia; A G Ghoshal; Dipti Gothi; Jyotsna Joshi; M S Kanwar; O P Kharbanda; Suresh Kumar; P R Mohapatra; B N Mallick; Ravindra Mehta; Rajendra Prasad; S C Sharma; Kapil Sikka; Sandeep Aggarwal; Garima Shukla; J C Suri; B Vengamma; Ashoo Grover; V K Vijayan; N Ramakrishnan; Rasik Gupta Journal: Indian J Med Res Date: 2014-09 Impact factor: 2.375