Impact of implants number and attachment type on the peri-implant stresses and retention of palateless implant-retained overdenture
Impact of implants number and attachment type on the peri-implant stresses and retention of palateless implant-retained overdenture
Blog Article
Objectives: To evaluate the impact of implants number and attachments type on the peri-implant stresses and retention of maxillary palateless implant-supported overdenture.Materials and Methods: Four edentulous maxillary educational acrylic resin models were used.According to the implants number and type of attachment used, four groups were compared: Group I, 2-locator attachments in the canine area; Group II, 2- OT equator attachments in the canine area; Group III, 4-locator attachments in the canine, second premolar area and Group IV, 4-OT equator attachments in the canine, second premolar area.Implants retained palateless overdenture was constructed on each model.Four self-protected linear strain gauges were cemented on each implant.
A digital loading device 3HV was used to apply compressive loads to measure the resulting peri-implant stresses.Forcemeter and Universal testing machines Changing baskets were used to test the retention of palateless overdenture.Results: A significant difference between the same implant number and distribution with different attachments was found (P = 0.003, P = 0.020), respectively.
Least stresses amount was found around the 4-implant locator palateless overdenture, while the highest was found around the 2-implant OT equator palateless overdenture.Nevertheless; the result was that 2-implant locator palateless overdenture recorded insignificant higher retentive forces than the 4-implant OT equator one.Conclusions: It can be concluded that the implant-retained palateless overdenture with four locator attachments is considered a promising treatment option regarding stress distribution.Using locator attachments, for implant-retained palateless overdenture with either two or four implants considering their superior retentive properties, is advantageous when compared to OT equator attachments.