Research

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ORIGINAL STUDY
Issue: 01/2015 - B. Giesenhagen
Clinical results of one-stage augmentation with autologous bone rings and Ankylos implants after 5 years of loading in an atrophied mandible

Objective of the study: The study was carried out to measure the success rate of bone ring augmentation, simultaneous placement of Ankylos implants (DENTSPLY Implants Manufacturing GmbH, Mannheim, Germany) and prosthetic restoration with fixed bridges and crowns after 5 years of loading.

Material and methods: 14 patients were treated with 25 bone rings, mainly harvested from the chin. Six were placed in the anterior region, 7 in the premolar area and 12 in the molar region. X-rays were taken pre- and postoperatively to document the bone level in relation to the implant shoulder. Bone ring and implant healing was closed. Reentry took place 6 months later and the implants were restored with fixed crowns and bridges. Five years after loading further X-rays were taken to measure the crestal bone in relation to the implant shoulder. Parameters for failure were postoperative complications, failed implants and bone resorption in the region of the implant shoulder.

Results: All patients participated in the follow-up. No implant was lost (100% survival rate). 3 implants (2patients) had postoperative complications but these had no influence on the crestal bone level after 5 years of loading. 4 implants (2patients) showed a little resorption in the crestal bone area. The donor region and implant position had no significant influence on periimplant bone loss.

Conclusion: Despite the limitations of the study, the bone ring technique has advantages compared with other augmentation techniques with autologous bone. Due to the standardized Instruments for ring harvesting and ring bed preparation the bone ring fits perfectly into the ring bed. The implant fixes the ring on top and achieves very good primary stability in the bone.

Cite as: Giesenhagen B: Klinische Fünfjahresergebnisse nach einzeitiger Augmentation mit autologen Knochenringen und Ankylos-Implantaten im atrophierten Unterkiefer. Z Zahnärztl Implantol 2015;31:52–63

DOI 10.3238/ZZI.2015.0052-0063

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Issue: 02/2015 - R. Schindjalova
Immediate implantation in retrospect – a study regarding success and failure of implantations

Introduction: The success of a dental implantation can be ranked by the criteria of the consensus conference of the International Congress of Oral Implantologists, agreed in 2007. The four-point scale rates an implantation using seve-ral criteria such as pain and mobility.

Material and Methods: The criteria were also used to determine the success rate of the following retrospective study, in which 30patients were treated with an fast fixed restoration. Lower and upper jaws were treated, and the implants (SKY fast fixed, bredent medical, Senden, Germany) were inserted axially and angulated.

Results: 98% of the implantations were successful with regard to the criteria of the consensus conference 2007. Problems occurred only in 3cases (4 implants in total), which were eliminated by reimplantation. Success rate after reimplantation is 100%.

Conclusion: fast fixed restorations proved an effective method of implantation. Especially the combination of angulated and axial implants provides the opportunity of a safe and probably successful implantation.

Cite as: Schindjalova R: Sofortimplantation in der Retrospektive – Eine Studie zu Erfolg und Misserfolg von Implantationen. Z Zahnärztl Implantol 2015;31:132–139

DOI 10.3238/ZZI.2015.0132–0139

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Issue: 04/2015
Retrospective analysis of cases treated with iSy implants in three dental practices: one-year follow-up

Introduction: For patients with limited financial resources, the price-performance ratio of dental implant treatment plays an important role. The iSy implant system offers effective time and cost management for the treatment of standard indications. The system comprises a reduced number of components in favor of higher standardization. The aim of this retrospective analysis is to document the use and success of the implant system using transgingival healing 2years after introducing the system in dental practices.

Material and Methods: All patients treated with iSy implants and prosthetic restorations in 3private practices between January 2013 and September 2014 were included in the analysis. A total of 87 patients with 166 implants were descriptively evaluated with regard to bone quality (Lekholm and Zarb), number, dimension, position of the implants, augmentation procedures, point in time of implantation and loading, type of restoration, implant survival rate, and complications.

Results: The implants were inserted in type 1 and 2 (72%) or type 3 (28%) bone. Simultaneous augmentation was necessary for 6 % of the implants. Immediate implantation was performed for 5.4 % of the implants. Implant diameters of 3.8mm (68.1%) and 4.4mm (25.9%) were the most commonly selected. Immediate loading was carried out in 22.9% of the implants. In case of delayed loading the healing time was 10.1±8.0 weeks. Final restorations were placed in 84 patients (160 implants) and divided into the 4standard indications single crown (63.1%), bridge (9.5%), partial denture (2.4%), and full denture (25.0%). Single crown restorations were mainly used in the posterior region and in patients under 60 years of age (71.7%); full dentures were placed essentially in patients over 60 years of age (85.7%). Most of the full dentures (57.1%) were retained by 4 implants. The most frequently used abutments were the CAD/CAM titanium bases for single crown and bridge restorations and the universal and Locator abutments for full and partial dentures. The mean follow-up time post loading was 9.2±4.8 months (0.1–20.3 months). Three quarters of all implants were loaded for at least 6 months. The cumulative survival rate over 23 months was 97.5%. Reported complications included 6 prosthetic complications as well as 2 patients with pain and one with bone loss.

Conclusion: In accordance with the implant system concept standard indications were treated with one-stage transgingival healing. The results of this analysis indicate that the system is a reliable as well as time and cost-effective implant solution for selected cases.

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Issue: 04/2015 - Stefan Ulrici - Thomas Barth - Jan Klenke - Manfred Wolf
Retrospektive Analyse von Patientenfällen mit iSy Implantaten in drei Zahnarztpraxen: Ein-Jahres Daten

Stefan Ulrici1, Thomas Barth1, Jan Klenke2, Manfred Wolf3

Retrospektive Analyse von Patientenfällen mit iSy Implantaten in drei Zahnarztpraxen: Ein-Jahres Daten

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