Three Dimensional Evaluation of Spring Loaded Bite Block Appliance in the Early Management of Anterior Open Bite
Rania Mohamed Magdy Samir;
Abstract
The aim of this study was to evaluate the efficiency of the spring loaded bite block appliance for the early management of anterior open bite. Cone Beam Computed Tomography was used to study the effects of the appliance not only in the vertical and anteroposterior planes, but also in the transverse plane, without the errors of superimposition of right and left sides found in other 2D methods.
Twenty one skeletal open bite patients were collected from the outpatient clinic of the Orthodontic Department, Faculty of dentistry, Ain Shams University. Out of these twenty one cases, only fourteen cases complied to wearing the appliance and were included in the study. The patients were all growing, with an age range of 8-13 years, and fitting in the cervical vertebrae maturation stages 2 and 3 (CVMS II and III).
A comprehensive diagnosis was performed for each case. Lateral cephalograms and panoramic radiographs were derived from CBCT scans of the patients. Extra-oral and intra-oral photographs and study models were also taken for each patient. The patient’s records were analyzed comprehensively. After confirming the skeletal basis of the open bite malocclusion in the selected cases, impressions and wax bites were taken for appliance fabrication. When received from the laboratory, the appliance was fitted and adjusted in the patient’s mouth. Patients were motivated and instructed to wear the appliance for a minimum of sixteen hours per day. Treatment was concluded when a positive overbite was achieved, with a maximum of nine months experimental period, whichever came first.
Treatment effects were evaluated three-dimensionally by comparing the pre-treatment and the post-treatment CBCT scans.
There was a statistically significant increase in overbite by 2.3 mm, at a monthly rate of 0.34 mm. Also statistically significant upper and lower molar intrusion was achieved, and consequently significant mandibular autorotation was observed. This sequence of events led to an improvement in vertical facial proportions and a change in the growth pattern into a more horizontal direction. Moreover, there were favorable clockwise rotations of
Twenty one skeletal open bite patients were collected from the outpatient clinic of the Orthodontic Department, Faculty of dentistry, Ain Shams University. Out of these twenty one cases, only fourteen cases complied to wearing the appliance and were included in the study. The patients were all growing, with an age range of 8-13 years, and fitting in the cervical vertebrae maturation stages 2 and 3 (CVMS II and III).
A comprehensive diagnosis was performed for each case. Lateral cephalograms and panoramic radiographs were derived from CBCT scans of the patients. Extra-oral and intra-oral photographs and study models were also taken for each patient. The patient’s records were analyzed comprehensively. After confirming the skeletal basis of the open bite malocclusion in the selected cases, impressions and wax bites were taken for appliance fabrication. When received from the laboratory, the appliance was fitted and adjusted in the patient’s mouth. Patients were motivated and instructed to wear the appliance for a minimum of sixteen hours per day. Treatment was concluded when a positive overbite was achieved, with a maximum of nine months experimental period, whichever came first.
Treatment effects were evaluated three-dimensionally by comparing the pre-treatment and the post-treatment CBCT scans.
There was a statistically significant increase in overbite by 2.3 mm, at a monthly rate of 0.34 mm. Also statistically significant upper and lower molar intrusion was achieved, and consequently significant mandibular autorotation was observed. This sequence of events led to an improvement in vertical facial proportions and a change in the growth pattern into a more horizontal direction. Moreover, there were favorable clockwise rotations of
Other data
| Title | Three Dimensional Evaluation of Spring Loaded Bite Block Appliance in the Early Management of Anterior Open Bite | Other Titles | تقييم ثلاثى الأبعاد للجهاز الرافع للعضة المعتمد على الزنبرك في العلاج المبكر للعضة الأمامية المفتوحة | Authors | Rania Mohamed Magdy Samir | Issue Date | 2017 |
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