[Studies on the state of pneumatization of the sinus maxillaris]

A report on 2940 x-rayfilm observations to show the behaviour of the pneumatisation of the maxillar sinus is beeing given. The greatest extension is reached at the age of 19th to 30 and show deminishing tendenz at later ages. The maxillar sinus is significantly smaller in the nonfemale than in the female. The left maxillar sinus is significantly larger than the right, just like in the feminie, however without statistical significance. 301 cleft proband show a significance smaller maxillar sinus in comparisation to normal persons.