 Procedures methods: Patients will be randomly allocated to receive horizontal bone augmentation with synthetic GUIDOR membrane freeze dried bone augmentation FDBA, synthetic GUIDOR membrane alone, or xenograft BioGide membrane FDBA. CBCT imaging will be obtained at baseline and 6 months post-operatively to assess dimensional alveolar ridge changes. Additionally, post-operative appointments at 1, 2, and 4 weeks post-grafting will be completed to assess the presence of inflammation, infection, wound dehiscence, or membrane exposure. 