Title {1}	The use of 3D-ceramic block graft compared with intra-oral autogenous bone block graft for rehabilitation of the atrophic maxilla: a randomized controlled split-mouth clinical trial.
Trial registration {2a and 2b}.	REBEC (Registro Brasileiro de Ensaios Clínico): RBR-76wmm3q.
Protocol version {3}	08/January/2022, version 02
Funding {4}	Primary Sponsor: M3 Health Indústria e Comércio de Produtos Médicos, Odontológicos e Correlatos Sociedade Anônima, Jundiaí, Brazil. Secondary Sponsor: School of Dentistry, São Paulo State University (Unesp), Araraquara, Brazil.
Author details {5a}	Carolina Mendonça de Almeida Malzoni Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University – UNESP. Araraquara, SP, Brazil. Victor Gonçalves Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University – UNESP. Araraquara, SP, Brazil. Juliana Posssari Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University – UNESP. Araraquara, SP, Brazil. Elcio Marcantonio Junior Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University – UNESP. Araraquara, SP, Brazil.
Name and contact information for the trial sponsor {5b}	Sybele Saska Specian, sybele.saska@plenum.bio Thaís Cabrera Galvão Rojas, thais.rojas@plenum.bio
Role of sponsor {5c}	Primary sponsors (M3 Health) contributed to the study design and protocol elaboration. M3 Health and the Principal investigator team have decided to submit the written report for publication. The principal investigator (Elcio Marcantonio Junior) and the coordinating researcher (Carolina Mendonça de Almeida Malzoni) elaborated the study design and will be responsible for performing the trial. This research team will run the interventions, analyze the data, and publish the results.