Mesio – distal evaluation
Premature tooth loss leads to the migration of adjacent teeth to the edentulous areas. Consequently, two aspects are important in mesio-distal evaluation:
1- mesio-distal dimension at the cervical area;
2- the narrowest distance between adjacent teeth.
The suggested ideal space is of 7mm, but the varies according to the tooth to be replaced and the platform diameter of the proposed implant.
Also, 2 mm are recommended between implant threads and adjacent root surfaces, and 3 mm between adjacent implants to preserve a physiologic septum; besides, the implant must be parallel to the long axis of teeth.
the closer the implant platform diameter is to the mesio-distal dimension, the wider the prosthetic abutment necessary for restoration will be, further compromising the cervical morphology of prosthetic restorations.