Stability, Mobility and Pull out Forces of Immediate Loaded Endosteal Screw Type Dental Implants of 4 and 4.5mm in Diameter (Comparative Experimental Study)

Aims: To compare the immediate loaded implants with the non–loaded type by pull–out force test measured with aids of semiautomatic strength tester machine and mobility test using orthodontic gauge and digital vernier. Materials and Methods: Twenty implants (Denti Dental implant system Ltd. Hungary) of screw type 10mm length with 4, and 4.5mm diameter were inserted in the mandible of 5 local breed dogs. Four implants for each animal, 2 of them were immediately loaded two days after surgery with Nickel Chrome crowns. Primary implant stability measured at the base line time, pull–out force test and mobility test done after three months of healing process. One–way analysis of variance with Duncan multiple range test were used for statistical analysis. Results: Revealed that there was no significant difference between the immediate loading and control group for the 4.5mm implant diameter, with significant difference for the 4mm diameter implant. No effect of time on the mobility of implant between the initial stability and final mobility of implants. The success rate of immediate loaded implants was 75% when compared to 100% success rate of non–loaded type. Conclusion: the immediate loading of screw type single–tooth implant of 4.5 mm diameter, 10mm length do not jeopardize tissue integration and osseointegration occurred properly as it is in the non–loaded delayed loaded type implants.