Research

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EDITORIAL
Issue: 01/2015
Dear readers and DGI members,

Dear readers and
DGI members,

Firstly, the entire editorial team of the ZZI would like to wish you every success and happiness for 2015.

This year again, the editorial team is committed to bringing you interesting articles that will provide you with scientific information and practical tips for rehabilitation of your patients’ masticatory function with an implant-borne prosthesis.

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Issue: 02/2015
Working for the future

Working for the future

Have you found time yet to leaf through the preliminary program of the seventh joint conference of the DGI (German Implantology Association), ÖGI (Austrian Implantology Association) and SGI (Swiss Implantology Association), the three German-language specialist implantology societies, which you received recently? If you have not yet managed to do so, maybe our brief report in this ZZI will rouse your curiosity. The conference takes place in Vienna in the pre-Christmas period. Together with my colleagues on the board, I am very happy that the three societies have succeeded in putting together an excellent and exciting program. The conference in the Austrian capital will therefore be the high point and conclusion of the implantology training year.

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Issue: 03/2015
Implant medicine: Science, craft and the art of healing – Is this like comparing apples and oranges?

Implant medicine: Science, craft and the art of healing – Is this like comparing apples and oranges?

The time has rolled around again – The annual DGI conference is approaching at the end of November. It takes place every three years as a joint session with the Austrian and Swiss associations.

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Issue: 04/2015
A win-win situation in Vienna

A win-win situation
in Vienna

Vienna, Austria is a city with an excellent reputation for congresses, and not without reason: As early as 200 years ago this city on the Danube demonstrated that it is a good location for negotiations. The Congress of Vienna was not only a venue for negotiations, but also for dancing: The Prince of Ligne is said to have remarked, “The congress dances, yet gets nowhere”. Whereas the negotiations were actually dogged and arduous, the intervals were taken up with magnificent festivities viewed in amazement from way beyond Austria’s borders.

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FROM PRACTITIONER TO PRACTITIONER
Issue: 02/2015
Clinical experience with various prosthetic materials for circular fixed bridges on tilted implants

Introduction: The treatment of edentulous jaws with circular bridges and a reduced number of implants has become an established treatment option. For the prosthetic restoration various treatment concepts are available that have been investigated in this retrospective study of possible risk factors.

Material and method: In a period from May 2008 to September 2013 a total number of 54patients received 62fixed bridges in the mandible or maxilla. 26fixed bridges were delivered in group A with a metal or zirconium oxide framework and ceramic veneering. In group B, after the temporary restoration a metal framework with the veneering by prefabricated composite veneers was used in 29jaws. In group C, the superstructures were made by high performance poly-mer framework and the fixation of prefabricated composite veneers in 7jaws.

Results: In group A, 3bridges showed a smaller chipping with the loss of one or more superficial layers of the ceramic veneering. For one bridge a deep fracture of the veneering occured. Two patients did not accept the superstructure, since at maximum intercuspidation a very rigid bit down was felt without damping behavior. Two patients were disappointed because the temporary restoration with the composite veneers was classified as aesthetically pleasing to the ceramic supply. In group B, there was a flaking of the composite veneer, after a previously well-controlled oromandibular dysfunction due to current stress load started again. In 2patients with a renewed high nicotine consumption of 30 and 40cigarettes per day after 29 and 42months, an extra-oral polishing and revision of the bridges was necessary. In group C no complications were evident in the short follow-up period.

Conclusion: The use of composite veneers for a circular fixed bridge shows a high aesthetic acceptance at a low rate of complications requiring treatment. Subjects with impaired compliance or a history of functional disorders are particularly suitable for a composite veneered superstructure, as these can be easily, quickly and inexpensively repaired. The application of ceramic-filled PEEK resin enables a cost-effective framework fabrication and shows after the first application phase no noticeable complication.

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Issue: 02/2015
SonicWeld: A case report on bone grafting of severe lateral and vertical atrophy

Introduction: The present case report describes the successful alveolar ridge reconstruction in a patient with severe lateral and vertical bone atrophy.

Material and Method: After the traumatic loss of tooth 21 17years ago, an implant was inserted and restored prosthetically to replace the lost tooth 21. The implant was positioned far to the cranial due to the lack of bone.

Results: 17years after successful restoration, the implant broke in the apical third. Even before the remaining implant fragment was removed, it was obvious that the cranial implant position had caused severe lateral and vertical bone loss. Two months after explantation, the alveolar ridge defect was augmented with SonicWeld Rx, bone substitute material and autogenous bone. Four months later an implant could be inserted after the complete reconstruction of the alveolar ridge. Six months after the successful osseointegration of the implant a prosthetic restoration was placed.

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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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