Anas El-Wegoud M, Fayyad A, Kaddah A, Nabhan.
 Bar versus ball attachments for implant-supported overdentures in complete edentulism: A systematic review. Clin Implant Dent Relat Res. 2018 Apr;20(2):243-250.

Varghese KG, Gandhi N, Kurian N, Daniel AY, Dhawan K, Joseph M, Varghese MG.
 Rehabilitation of the severely resorbed maxilla by using quad zygomatic implant-supported prostheses: a systematic review and meta-analysis. J Prosthet Dent. 2021 Dec 14:S0022-3913(21)00628-4. [Epub ahead of print]

Sáez-Alcaide LM, Cortés-Bretón-Brinkmann J, Sánchez-Labrador L, Pérez-González F, Forteza-López A, Molinero-Mourelle P, López-Quiles J. Patient-reported outcomes in patients with severe maxillary bone atrophy restored with zygomatic implant-supported complete dental prostheses: a systematic review. Acta Odontol Scand. 2022 Jul;80(5):363-373

Vi S, Pham D, Du YYM, Arora H, Tadakamadla SK. Mini-Implant-Retained Overdentures for the Rehabilitation of Completely Edentulous Maxillae: A Systematic Review and Meta-Analysis. Int J Environ Res Public Health. 2021 Apr 20;18(8):4377

OhWS,OhJ,JinQ. Bone loss in the anterior edentulous maxilla opposing two-implant-supported overdentures vs complete dentures: a systematic review and meta-analysis. Quintessence Int. 2020;51(9): 722-731.

Messias A, Nicolau P, Guerra F. Different Interventions for Rehabilitation of the Edentulous Maxilla with Implant-Supported Prostheses: An Overview of Systematic Reviews. Int J Prosthodont. 2021 Suppl;34:s63-s84

Mehta SP, Sutariya PV, Pathan MR, Upadhyay HH, Patel SR, Kantharia NDG.
 Clinical success between tilted and axial implants in edentulous maxilla: A systematic review and meta-analysis. J Indian Prosthodont Soc. 2021 JulSep;21(3):217-228.

Lozano-Carrascal N, Anglada-Bosqued A, Salomó-Coll O, HernándezAlfaro F, Wang HL, Gargallo-Albiol J. Short implants (

Lan K, Wang F, Huang W, Davó R, WuY.
 Quad Zygomatic Implants: A Systematic Review and Meta-analysis on Survival and Complications.
 Int J Oral Maxillofac Implants. 2021 Jan-Feb;36(1):21-29.

Jiang X, Zhou W, Wu Y, Wang F. Clinical Outcomes of Immediate Implant Loading with Fixed Prostheses in Edentulous Maxillae: A Systematic Review. Int J Oral Maxillofac Implants. 2021 May-Jun;36(3):503-519.