Hard And Soft Tissue Changes Following Two Modes Of Retention Management After Twin Block Therapy: A Retrospective Cephalometric Study
| dc.contributor.author | Moustafa Said Moustafa Said Maurtgi | |
| dc.date.accessioned | 2021-03-22T07:05:48Z | |
| dc.date.available | 2021-03-22T07:05:48Z | |
| dc.date.issued | 2018-07 | |
| dc.description.abstract | A retrospective cephalometric study was conducted in the Advanced Medical & Dental Institute (AMDI), Universiti Sains Malaysia (USM), to assess the soft and hard tissues changes that occur in two sets of patients receiving two different relapse management after Twin block therapy. The radiographic records consisted of Malay ethnicity patients age ranged between 10 and 15 years. Patients were diagnosed as Class II Division 1 malocclusion with overjet of 5 mm or greater or Class II skeletal pattern of ANB angle of 5o or greater and were treated with the Twin block appliance. The records of 26 patients were found and were divided into two groups. Group (A) is those radiographs from subjects who received fixed orthodontic appliance immediately after the Twin block therapy and group (B) is those radiographs from subjects who received fixed orthodontic appliance after 3 months retention period after Twin block therapy. Lateral cephalometric radiographs from the database were grouped into, (T1): before Twin block therapy, (T2): after Twin block therapy completion, and (T3): after 6 months of fixed appliance placement. Several cephalometric analyses were used including Holdaway, Burstone, Pancherz, and Steiner to assess soft tissue changes and hard tissue changes weather that be skeletal, dental, or dento-alveolar. Mann-Whitney test to compare pre-treatment (T1) measurements of groups A and B patients. Wilcoxon signed-rank test was used to detect changes occurring through time within the groups. Changes between group A and B in (T2) and (T3) were compared using Mann-Whitney test. Wilcoxon signed-rank test showed significant differences were found in group (A) between T2 and T3 stages which included soft tissues, skeletal, dental, and dento-alveolar. In group (B) significance was found in the in the condyle position, soft tissue pogonion position, and the position of the upper first molar within the alveolar bone. When comparing, the differences using Mann-Whitney test it was found that there is no statistical difference between the groups indicating that linear or angular variables had not changed beyond 2.5 mm or 2.5o. The results suggest that the 3 months retention is not beneficial when compared to the changes observed in the immediate fixed appliance stage. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/12408 | |
| dc.language.iso | en | en_US |
| dc.publisher | Universiti Sains Malaysia | en_US |
| dc.subject | Cephalometric Study | en_US |
| dc.subject | Malocclusion | en_US |
| dc.title | Hard And Soft Tissue Changes Following Two Modes Of Retention Management After Twin Block Therapy: A Retrospective Cephalometric Study | en_US |
| dc.type | Thesis | en_US |
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