Rehabilitation With 4 Zygomatic Implants With a New Surgical Protocol Using Ultrasonic Technique
Marco Mozzati, MD, DDS, Carmen Mortellaro, MD, DDS,y Valentina Arata, DDS,z,Giorgia Gallesio, DDS, and Valter Previgliano, DDS
When the residual bone crest cannot allow the placement of standard implants, the treatment for complete arch rehabilitation
of severely atrophic maxillae can be performed with 4 zygomatic implants (ZIs) and immediate function with predictable results in terms of aesthetics, function, and comfort for the patient. However, even if ZIs’ rehabilitations showed a good success rate, this surgery is difficult and need a skillful operator. Complications in this kind of rehabilitation are not uncommon; the main difficulties can be related to the reduced surgical visibility and instrument control in a critical anatomic area. All the surgical protocols described in the literature used drilling techniques. Furthermore, the use of ultrasonic instruments in implant surgery compared with drilling instruments have shown advantages in many aspects of surgical procedures, tissues management, enhancement of control, surgical visualization, and healing. The aim of this study was to report on the preliminary experience using ultrasound technique for ZIs surgery in terms of safety and technical improvement. Ten consecutive patients with severely atrophic maxilla have been treated with 4 ZIs and immediate complete arch acrylic resin
provisional prostheses. The patients were followed up from 30 to 32 months evaluating implant success, prosthetic success, and patient satisfaction with a questionnaire.
No implants were lost during the study period, with a 100% implant and prosthetic success rate. Within the limitations of this preliminary study, these data indicate that ultrasonic implant site preparation for ZIs can be a good alternative to the drilling technique and an improvement for the surgeon.
Key Words: Zygomatic implants, zygomatic fixture, edentulous atrophied maxillae, ultrasonic surgery, immediate function, atrophic.
(J Craniofac Surg 2015;26: 722–728)
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