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Wednesday, Rabii-Awal 22nd, 1446H, September 25th, 2024, the candidate researcher/

Farida BUKAREZA

obtained the Master degree in Orthodontics, Pedodontics and Prevention with an Excellent average, from the Department of Orthodontics, Pedodontics and Prevention, Faculty of Dentistry, Sanaa University, for her Master’s thesis entitled:

Phenotypic Characterization of Skeletal Class III Malocclusion via Three Dimensional Analysis in a Selected Group of Yemeni Population

The discussing committee consisted of:

♦ Professor Dr. Ghamdan Abdalla Ahmed AL-HARAZY, Principle Supervisor Committee Member,

♦ Professor Dr. Yasser Ali Ahmed THABET, External Examiner Head of Committee, and

♦ Associate Professor Fuad Lotf Ahmed AL-MOTARREB, Internal Examiner Committee Member

This Master’s thesis aims at characterizing class III malocclusion subgroups based on the phenotypic characteristics using the three dimensional radiograph in a selected group of the Yemeni population and detecting the difference between gender.

The study comes out with results and key findings: The Phenotypic Characterization Analysis reveals 8 axis models responsible for 78.9% of the variation of data produced from 74 variables. The first four components accounted for 56% of the total variations, explained mainly the sagittal, dental parameters, vertical linear and anterio-posterior relationships. The CA reveal four skeletal class III malocclusion phenotypes: Class 1, 32.8%, C2, 28.4%, C3, 28.4%%, and C4, 10.4%.

Conclusions: Based on the three-dimensional analysis, four phenotypes of skeletal class III malocclusion are identified amongst the Yemeni population. Sub-phenotypes of the Yemeni Skeletal Class III individuals are significantly varied between genders.

The researcher presents a number of recommendations at the end of this dissertation, of which: it is important to conducting future studies on a larger number of Class III malocclusion cases.

Attendees of the session were a number of academics, researchers, interested students of the major, as well as the researcher’s colleagues and some of family members.