Implant position for supporting maxillary over-denture: A clinical study

Using implant-supported overdentures can solve the main problems of a complete removable denture. This retrospective study aimed to identify the most predictable implant position for maxillary overdentures and encountered mechanical complications, as well as the marginal bone loss. A total of 26 subjects were treated with maxillary overdentures supported by two to three implants on each side, either in the molar (Group PS) or the premolar area (Group ANT). The implants were connected by a casted bar with a soldered Locator®. Mechanical complications and bone loss were recorded. The average bone loss was 2.02 mm, with no statistical differences between Group PS and Group ANT. Mechanical complications were observed in 75,0% of the cases in Group PS, whereas only 21,4% subjects from Group ANT needed maintenance. There is a statistically significant association between groups and the occurrence of mechanical complications (p=0,016). The maxillary overdenture supported by implants inserted in the premaxilla is more predictable and suffers fewer mechanical complications than the one retained by posterior implants.