| ORIGINAL ARTICLE |
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| Year : 2015 | Volume
: 3
| Issue : 3 | Page : 192-198 |
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Bimaxillary protrusion in a Sudanese sample: A cephalometric study of skeletal, dental and soft-tissue features and treatment considerations
Salma Babiker Idris Elhag, Shaza Kamal Abbas, Eman Salama Ibrahim, Hayder Abdallah Hashim, Abdallah Abdulhafiz Sharfy
Department of Orthodontics, University of Khartoum, Khartoum, Sudan
Correspondence Address:
Salma Babiker Idris Elhag
Department of Orthodontics, University of Khartoum, Khartoum
Sudan
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/2321-3825.158136
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Introduction: Bimaxillary protrusion (BP) is a condition that results in the convexity of the face and lip incompetence. There are two forms of BP, a dentoalveolar type and a skeletal type each requiring a different treatment plan. Aims: The aims of this study were to cephalometrically determine the skeletal, dental and soft-tissue features of a sample of Sudanese adults with BP to establish the origin, growth pattern, and presence of gender dimorphism. Design: Descriptive, retrospective study. Setting: Orthodontic Clinics in University of Khartoum, Khartoum Dental Teaching Hospital and University of Science and Technology. Materials and Methods: Pretreatment lateral cephalometric radiographs of 60 patients (30 males and 30 females) with BP (mean age 25.4 ± 6 years) were collected and manually traced. Twenty-two variables were assessed and compared to Sudanese norms (n = 73) which included (35 males and 38 females) of similar age (22.5 ± 3 years) using Student t-test and one sample t-test. Results: The sample revealed significantly smaller SNA, SNB angles and increased incisor protrusion and lip thickness than Sudanese norms (P < 0.05). However, the sample showed significantly higher SNMP, MMPA, upper facial height (UFH), lower facial height, FP% (P < 0.05). Only five gender differences were demonstrated; UFH, U1L1, LlNB mm, LlNB (°), and lower lip length. Conclusion: It can be concluded that facial convexity in Sudanese patients with class 1 molars is a result of bimaxillary dentoalveolar protrusion and increased lip thickness. The patients also revealed a vertical growth pattern with males and females demonstrating similar cephalometric profiles. Treatment of such patient entails extraction of all first premolars with maximum anchorage. |
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