Master’s Degree Awarded to Ms. Samia Abdulmajid Dawood in Orthodontics

Ms. Samia Abdulmajid Ali Dawood was awarded a Master’s degree in the major of Orthodontics for her thesis titled, “Evaluation of Intrusion Effects of Mini-screws for Treatment of Gummy Smile Using Cone-Beam Computed Tomography,” which was submitted to the Department of Orthodontics, Paediatric, and Preventive Dentistry, Faculty of Dentistry- Sana’a University. The defense was held on Thursday, October 23, 2025.

The MA Viva-voce Committee, which was formed based on a resolution issued by the Post-Graduate Studies and Scientific Research Council, consisted of the following:

#	Committee Members	Designation	University	Position
1	Assoc. Prof. Khaled Ahmed Al-Dharai	External examiner	Thamar University	Member
2	Assoc. Prof. Fouad Lotf Al-Mutarreb	Internal Examiner	Sana’a University	Chair
3	Prof. Ghamdan Abdullah Al-Harazi	Main supervisor	Sana’a University	Member

The study aimed to:

Evaluate the effect of Mini-screws for the treatment of a gummy smile.
Analyze skeletal and dental changes, deep bite correction, gingival smile reduction, intrusion rate, and external apical root resorption.

The main findings of the study included:

The use of mini-screws allows for the successful correction of both the gummy smile and deep bite.
Significant retraction of the maxillary incisors was observed by 1.32 ± 0.34 mm relative to the Vertical Alar Plane (p<0.05).
Root resorption was noted to be higher in the quadrants (lateral segments).

The study concluded with several key recommendations:

This method provides favorable results when patients require avoidance of posterior anchorage for the treatment of deep bite and gummy smile cases.
Use Cone-Beam Computed Tomography (CBCT) for accurate treatment planning in complex gummy smile cases.
Closely monitor the occurrence of external apical root resorption.

The study was examined and recommended by the MA Viva-Voce Committee for acceptance and approval. The defense was attended by a number of academics, researchers, students, and interested individuals, in addition to the candidate’s colleagues and family members.