The discrepancy between ICP and MCP caused by orthodontic treatment and its quantitative assessment to the effect of later orthodontic treatment
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PURPOSE: To investigate the discrepancy between ICP and MCP caused by orthodontic treatment,to evaluate the treatment effect of the malocclusion with later orthodontic treatment. METHODS: Nineteen cases were selected and treated with preadjusted appliance and combination headgear appliance.Pre- and post- treatment celphalometric radiographs were analyzed. RESULTS: Discrepancy between ICP and MCP may be resulted from improper design and operation of orthodontists and poor cooperation of patients ;By preadjusted appliance and combination headgear appliance,upper dental arch was moved distally; Molar relationship was changed into Class I by bodily movement; A harmonization between ICP and MCP was rehabilitated. CONCLUSIONS: The discrepancy between ICP and MCP should be minded; Preadjusted appliance and combination headgear appliance were effective in the correction of the discrepancy between ICP and MCP.Keywords:
Dental arch
Cephalometry
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Objective:To evaluate the orthodontic treatment after the surgery of condylar hyperplasia(CH),and to explore the methods for orthodontic treatment.Methods:20 patients(9 males and 11 females),aged 15-36ys with an average age of 25.5ys with condylar hyperplasia after high condylectomy were selected.Straightwire appliance was used for the orthodontic treatment.Routine radiographs including panaramics and cephalometrics were taken before,during and after the treatment.Results:After orthodontic treatment,anterior and posterior open bite was corrected,and normal overjet and overbite were obtained.Satisfactory occlusion was achieved with classⅠor complete classⅡ molar relationships on both sides.Conclusion:Malocclusion after surgery of condylar hyperplasia could be effectively corrected by straight wire appliance,vertical elastics and reciprocal elastics.
Overjet
Open bite
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Skeletal classII div I malocclusion are common orthodontic problem due to mandibular deficiencies. This problem could be addressed by stimulating sagittal mandibular growth by using functional and fixed functional appliance which can be used during pre and post pubertal growth period. Herbst appliance being rigid fixed functional appliance is beneficial in treatment of post pubertal skeletal class II patients and does not depend on patients compliance. A female patient of age 12 years with post pubertal growth status by 6 months, reported to the department of orthodontics. On extraoral examination she had a convex profile with retrognathic mandible and everted lower lip. Intraoral examination revealed class II molar relationship and end on canine relationship on both side, over jet of 7 mm and overbite of 4 mm. Since patient was post pubertal by 6 months growth modulation procedure was carried out with Herbst appliance for a period of 8 months followed by fixed appliance therapy for one year 4 months to correct the dento alveolar problems. Post treatment results showed that combination of Herbst and fixed mechanotheraphy using 0.022 slot was effective in the treatment of skeletal and dental irregularities in a short period of time.
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Anterior teeth
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Objective To investigate the appliance appliance wrong occlusal malformations clinical results. Methods Wrong occlusal 60 patients under different treatment methods into treatment group and control group of 30 patients in the control group with conventional edgewise orthodontic treatment group using auxiliary appliance orthodontic treatment. Results The total effective rate was 93.3% in the control group, the total effective rate was 73.3%, compared to significant differences(P0.05). 3 months follow-up, the treatment group increased periapical bone density measurement was significantly higher(P0.05). Conclusion Appliance appliance wrong occlusal deformity is a good efficacy, adaptability treatment. Worthwhile to continue to promote the application.
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The aim of this study was to use densitometry of lateral skull teleradiographs to evaluate the changes that occurred in the lower lip and chin after orthodontic or orthodontic-surgical treatment of Class III malocclusion. Forty teleradiographs from 20 patients with mandibular prognathism were made at the beginning and end of treatment. In ten of these patients the treatment was exclusively orthodontic with an edgewise appliance, and in another ten the treatment was orthodontic with a straight wire appliance combined with orthognathic and mentoplastic surgery. In the patients who were only treated orthodontically, a significant increase in density of the lower lip and the chin was found after treatment. This seemed to be related to an increase of muscular tension in these areas. Patients treated with orthognathic surgery and the straight wire appliance showed a decrease in density of the chin after treatment, but not of the lip. This can be interpreted as a consequence of muscular normalization after this procedure was accomplished.
Mandibular prognathism
Prognathism
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Objective To study the clinical effect of orthopedic-orthodontic treatment in crossbite in deciduous dentition through cephalmetric analysis. Methods 12 children with crossbite in deciduous dentition were enrolled in treatment group. Control group included 8 patients with normal deciduous dentition. Modified reverse headgear was used in each patient in the treatment group. Orthodontic force was a-bout 2. 94-4. 90 N (300-500 g) , and the direction of force was under occlusion plane for 37 degree. Each patient wore reverse headgear for 10 hour per day. Orthodontic treatment lasted for 6 months, and then orthodontic treatment began at once. Orthodontic treatment was not over until crossbite was corrected. The cephalmetric change was compared between two groups before treatment (T1) , after orthopedic treatment (T2)and after orthodontic treatment (T3). The effect of orthopedic-orthodontic treatment was analyzed in two group. Results Crossbite was corrected successfully in all patients in the treatment group. After treatment, A point moved forward by 2. 8mm, Is-FHp increased 8. 38 mm, ＜SNA increased 2. 65, incisors in mandible moved backward a little bit. All these changes were statistical different as compared with those in the control group. Conclusion Skeletal and dental deformity are improved progressively after combined orthopedic-orthodontic treatment. It is recommended to perform orthopedic-orthodontic therapy in skeletal crossbite in deciduous dentition.
Key words:
Orthopedic treatment; Orthodontic treatment; Reverse headgear; Crossbite in deciduous dentition
Crossbite
Deciduous dentition
Mandible (arthropod mouthpart)
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To investigate the discrepancy between ICP and MCP caused by orthodontic treatment. to evaluate the treatment effect of the malocclusion with later orthodontic treatment.Nineteen cases were selected and treated with preadjusted appliance and combination headgear appliance.Pre- and post- treatment celphalometric radiographs were analyzed.Discrepancy between ICP and MCP may be resulted from improper design and operation of orthodontists and poor cooperation of patients; By preadjusted appliance and combination headgear appliance,upper dental arch was moved distally; Molar relationship was changed into Class I by bodily movement; A harmonization between ICP and MCP was rehabilitated.The discrepancy between ICP and MCP should be minded; Preadjusted appliance and combination headgear appliance were effective in the correction of the discrepancy between ICP and MCP.
Dental arch
Cephalometry
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A 12 year old boy presented with class II skeletal and dental relationship due to prognathic maxilla and retrognathic mandible with excessive overjet and 100% deepbite. He was treated with 2 phase treatment by phase 1 growth modification therapy using twinblock appliance with combination pull headgear to improve his profile followed by phase II fixed mechanotheraphy to settle his occlusion. Pretreatment, postfunctional and posttreatment records are shown and treatment stability after 2 years are also shown.
Overjet
Mandible (arthropod mouthpart)
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Objective: To evaluate the efficiency of the Frog appliance (FA) alone or in combination with headgear for distalizing the maxillary molars. Methods: Fifty patients (25 males and 25 females) aged 12.6 - 16.7 years who received treatment for Class II malocclusion at the Orthodontic Clinic of Al-Baath University were selected for this study and randomly divided into 2 equal groups. Maxillary molar distalization was achieved using the FA alone (group 1) or a combination of the FA with high-pull headgear worn at night (group 2). Lateral cephalograms were obtained before and after treatment. Results: The maxillary molars moved distally by 5.51 and 5.93 mm in groups 1 and 2, respectively. Distal movements were associated with axial tipping by 4.96˚ and 1.25˚, and with loss of anchorage by mesial movement of the second maxillary premolars by 2.70 and 0.90 mm in groups 1 and 2, respectively. The combined use of the FA and nighttime high-pull headgear decreased the distalization time and improved the ratio of maxillary molar distalization movement relative to the overall opening space between the first maxillary molars and second premolars. Conclusions: The FA can effectively distalize the maxillary molars, this distalization associates with some unfavorable changes. Nighttime use of highpull headgear combined with the FA can reduce these unfavorable changes and improve treatment outcomes.
Maxillary molar
Maxillary first molar
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