A) Perforation of the interim prosthesis using the Flexafit® drill. 

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Context 1

... prostheses in those cases where the implants are positioned at subcrestal level or in patients with excess soft tissue. It also should be mentioned that the different primary and secondary abutment widths make it possi- ble to correct disparallelisms for immediate loading of between 30-60 degrees. In all cases, the surgical part of the treatment was carried out by three dentists specialized in implantology, while the procedure of immediate loading and subsequent ma- nufacture of the definitive prosthesis was performed by two prosthodontists. The following steps were followed to implement the Flexafit® system protocol for immediate loading: 1. The primary abutment was connected to the implant with a torque of 30 Ncm (Fig. 2a). 2. A thin protective plastic film was positioned over the primary abutment in order to isolate the gums and abutment from the acrylic resin of the rebase of the pros- thesis (Fig. 2b). 3. The interim grade V titanium secondary abutment was fitted onto the primary abutment by means of the snap- on mechanism, without screw retention. The hole of the secondary abutment was filled with wax to prevent the penetration of rebase resin. 4. The interim prosthesis was rebased with acrylic resin (Sintodent®, Sintodent S.R.L.; Rome, Italy). 5. The holes for access of the prosthetic fixation screws were prepared through the secondary abutments (Fig. 3a). To this effect, the base of the secondary abutment was fitted onto a special accessory with the shape of the head of the primary abutment and mounted onto the Flexafit® precision drill, which is equipped with a 2 mm diameter tungsten carbide bur for perforating perpendi- cular to the base of the connection. 6. The prosthesis was drilled, polished and prepared to ensure correct anatomical characteristics for adequate patient-performed hygiene. 7. The interim prosthesis was fitted onto the primary abutment, and stability was ensured by tightening the fixation screws at a torque of 20 Ncm (Fig. ...

Context 2

... prostheses in those cases where the implants are positioned at subcrestal level or in patients with excess soft tissue. It also should be mentioned that the different primary and secondary abutment widths make it possi- ble to correct disparallelisms for immediate loading of between 30-60 degrees. In all cases, the surgical part of the treatment was carried out by three dentists specialized in implantology, while the procedure of immediate loading and subsequent ma- nufacture of the definitive prosthesis was performed by two prosthodontists. The following steps were followed to implement the Flexafit® system protocol for immediate loading: 1. The primary abutment was connected to the implant with a torque of 30 Ncm (Fig. 2a). 2. A thin protective plastic film was positioned over the primary abutment in order to isolate the gums and abutment from the acrylic resin of the rebase of the pros- thesis (Fig. 2b). 3. The interim grade V titanium secondary abutment was fitted onto the primary abutment by means of the snap- on mechanism, without screw retention. The hole of the secondary abutment was filled with wax to prevent the penetration of rebase resin. 4. The interim prosthesis was rebased with acrylic resin (Sintodent®, Sintodent S.R.L.; Rome, Italy). 5. The holes for access of the prosthetic fixation screws were prepared through the secondary abutments (Fig. 3a). To this effect, the base of the secondary abutment was fitted onto a special accessory with the shape of the head of the primary abutment and mounted onto the Flexafit® precision drill, which is equipped with a 2 mm diameter tungsten carbide bur for perforating perpendi- cular to the base of the connection. 6. The prosthesis was drilled, polished and prepared to ensure correct anatomical characteristics for adequate patient-performed hygiene. 7. The interim prosthesis was fitted onto the primary abutment, and stability was ensured by tightening the fixation screws at a torque of 20 Ncm (Fig. ...