“Parallelaizer”: Surgical Kit and method of set-up in osteointegrated implants, and the parallelism of bone master hole

Introduction. Biomechanics play an important role in dental implantology whereby set-up of the parallelism (arc stability) between two or more implants in relation to the occlusal plane is fundamental. Objective. Verification of parallelism of the bone master holes using a “Parallelizer”. Materials and Methods. In a preliminary clinical phase, 15 patients (first control group) qualified for prothesic implant with partial upper and lower maxilla edentulia were selected. They received complessively 38 implants using the “Parallelizer”. Preliminary laboratory phase. A manufactured resin plate was used as a surgical guide. It has holes at the center of the occlusal surfaces. A specific calliper was then used to determine the distance between the holes. This measurement was trasfered to the “Parallelizer”. Surgical phase. A surgical drilling machine was lodged in the “Parallelizer” and subsequently used to make master holes in the center of the occlusal surface of the resin plate. A pivot block was then introduced in the same master hole. This guaranteed precision in the drilling of subsequent holes. Results and Conclusions. A 97,37% parallelism among the implants was obtained. Chi-Square Test = 0,3089.