Premaxilla: up to which age it remains separated from the maxilla by a suture, how often it occurs in children and adults, and possible clinical and therapeutic implications: Study of 1,138 human skulls

Admin Dental Press

Edition V23N06 | Year 2018 | Editorial Orthodontic Insight | Pages 16 to 29

Mariana Trevizan , Paulo Nelson Filho , Solange De Oliveira Braga Franzolin , Alberto Consolaro

Objective: To evaluate topographic and temporal aspects of premaxillary bone and premaxillary-maxillary suture, since they are fundamental anatomical elements little explored clinically. Methods: 1,138 human dry skulls were evaluated, of which 116 (10.19%) of the specimens were children, and 1,022 (89.81%) were adults. The skulls were photographed and the percentage of premaxillary-maxillary suture opening was determined. Subsequently the data were tabulated and submitted to statistical analysis, adopting a level of significance of 5%. Results: The progression of premaxillary suture closure from birth to 12 years of age was 3.72% per year. In 100% of the skulls up to 12 years, the premaxillary-maxillary suture open in the palatal region was observed, while 6.16% of adults presented different degrees of opening. Conclusions: The premaxilla exists in an independent way within the maxillary complex and the presence of the premaxilla- maxillary suture justifies the success of anteroposterior expansions to stimulate the growth of the middle third of the face, solving anatomical and functional problems.

Premaxilla, Maxillofacial development, Maxilla, Sutures,

Trevizan M, Nelson Filho P, Franzolin SOB, Consolaro A. Premaxilla: up to which age it remains separated from the maxilla by a suture, how often it occurs in children and adults, and possible clinical and therapeutic implications: Study of 1,138 human skulls. Dental Press J Orthod. 2018 Nov-Dec;23(6):16-29. DOI: https://doi.org/10.1590/2177-6709.23.6.016-029.oin

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