Screw-retained restoration

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Fig. 1: Initial situation. (All images: Dr Anthony Bendkowski)

Mon. 28 August 2023


Dental implants are widely accepted as a successful method for replacing missing teeth. The success of dental implant treatment depends on many factors, such as implant design, surgical technique, bone quality and patient factors. The aim of this case report is to present a step-by-step description of the implant treatment and restoration of a patient who had undergone extraction of a maxillary right first molar and second premolar, from the initial osteotomy preparation to the final restoration.

Fig. 2: Pre-op radiographic assessment.

Fig. 2: Pre-op radiographic assessment.

Case presentation

A 64-year-old female patient presented to our practice with a heavily restored dentition. Her failing maxillary right first molar and second premolar had been extracted by her general dental practitioner (Fig. 1), leaving an unbounded edentulous area. Radiographic assessment indicated that there was ample bone depth in the posterior maxilla to allow for satisfactory implant placement (Fig. 2). An implant solution was provided using two individual screw-retained crowns supported by two OmniTaper EV implants (Dentsply Sirona) and using a digital workflow with Primescan and Atlantis (Dentsply Sirona).

A full-thickness envelope flap was raised with relieving incisions, and the initial small round guide drill was used to mark the implant position. The site was enlarged with OmniTaper drills of different diameters, following the recommended drilling protocol. The initial osteotomy preparation was performed with a 2mm diameter OmniTaper drill at no more than 1,500 rpm and with copious external irrigation with saline according to the surgical protocol (Fig. 3). An OmniTaper EV 3.8 × 11.0 mm implant was placed in position #15 using the TempBase driver (Fig. 4). Both OmniTaper EV implants placed with the help of the preassembled TempBase abutments nicely aligned in positions #15 and 16 (Fig. 5).

Next, the large quantity of autogenous bone collected with the disposable BoneTrap (Dentsply Sirona) during surgery was used to augment the small bone fenestration (Figs. 6 & 7), and Symbios Xenograft Granules were layered over the autogenous bone (Fig. 8). Finally, Symbios Collagen Membrane SR (15 × 20 mm) was trimmed to shape to complete the guided bone regeneration procedure (Fig. 9). The wound was closed with PGA sutures (Fig. 10), and radiographic evaluation was performed to verify the implants postoperatively (Fig. 11). Three months later, medium Healing Abutments EV were placed (Fig. 12).

A digital impression using an intra-oral scanner (Primescan) was then captured using the Atlantis IO FLO for a digital restorative workflow (Fig. 13). An Atlantis CustomBase solution, consisting of an Atlantis crown, an Atlantis abutment and an Atlantis abutment screw, was fabricated for each implant and tried in, and no adjustments were needed (Figs. 14 & 15). After seating, a radiographic evaluation was performed to verify the final restorations (Fig. 16). The final restorations showed excellent soft-tissue adaptation and an aesthetic outcome (Figs. 17 & 18). The patient was extremely satisfied with the outcome of the treatment and the fixed restorations.


This case report highlights the successful placement of OmniTaper EV implants in a patient with a heavily restored dentition. The use of an intra-oral scanner and impression components for the prosthodontic and technical digital workflow allowed for precise planning and execution of the treatment plan. The use of the OmniTaper drill system allowed for efficient and predictable placement of the implant.

Editorial note:

This article was published in digital—international magazine of digital dentistry vol. 4, issue 2/2023.

Dental implantology Digital dentistry Digital workflows in dentistry Intra-oral scanners Restorative dentistry Screw retained prosthesis

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