P-PB-048 Periimplant bone stability of small diameter implants Neugebauer, J.1,2,Henn, P.1, Kistler, F.2, Kistler, S.2 IMPLANT THERAPY OUTCOMES, PERI-IMPLANT 1. Interdisciplinary dep. of Oral Surgery and Implantology, University Cologne BIOLOGY ASPECTS 2. Dr. Bayer and Colleagues, Dental clinic, Landsberg am Lech, Germany

Abstract Methods and Materials Results

Implant design must fulfil the mechanical stability Between March 2013 and March 2019 a total number The number of screw loosening showed no signifi- requirements for prosthetic loading and should also of 420 diameter reduced implants in 182 patients cant difference for diameter reduced and control provide an easy handling. Long-term stability for were placed. 89 patients received additional standard implants. No abutment or implant fracture for the implants is determined by a reliable implant abut- or wide body implants. The median of observation diameter reduced implants occurred. Four diameter ment connection without screw loosening and period was 958 with a maximum of 2.227 days, as reduced implants showed no osseointegration at stable peri-implant bone level. An implant system intra-patient control 89 implants were randomly the time of second stage surgery or after 3 months with various diameters has been designed with a chosen. The implants were used for delayed loading of immediate loading. The change of peri-implant mono platform of 4 mm for easy prosthetic hand- in combination with grafting procedures or for bone level for diameter reduced and control ling. Due to the demand to use also a diameter- immediate loading. For the evaluation of the implants showed no significant difference. In the reduced implant, a narrower implant was introduced development of the peri-implant bone level the detailed analysis also, no significant difference was in 2013 with a body and platform of 3.5 mm. routinely taken radiographs were analyzed. found for delayed or immediate loading or for placement in the anterior or posterior arch.

Insertion of diameter reduced implant (narrowSky, Bredent Medical, Senden) with lateral augmentation with xenogenic grafting material

Scatterplot of vertical bone level change acc. diameter Box-Plot of overall recall values acc. grafting Recall one and four years with stable soft and hard with regression loess line (Epanechnikov 95% procedures, with a significant increase of bone level tissue after initial xenogenic grafting, radiographs below confidence) change for xenogenic material (p=0,018)

Evaluation of marginal bone level with calibration tool Scatterplot of vertical bone level change acc. area of utilizing implant length (red line) in radiological placement (low area: lateral maxilla and all mandibular Distribution of implant position acc. tooth position software (Sidexis 4.3, DentsplySirona, Bensheim) incisors, high area: all others)

Background and Aim Conclusion References

The diameter-reduced implant with body and plat- The aim of this retrospective analysis was to Klein MO, Schiegnitz E, Al-Nawas B. Systematic review on form of 3.5 mm shows reliable prosthetic restora- success of narrow-diameter dental implants. Int J Oral determine the number of screw loosening and to tion and stable peri-implant bone level. Indepen- Maxillofac Implants 2014;29 Suppl:43-54. analyze the changes in peri-implant bone level for Ortega-Oller I, Suarez F, Galindo-Moreno P, Torrecillas- dent if they have been used for delayed or imme- the standard and wide body implants in Martinez L, Monje A, Catena A, et al. The influence of diate loading and the use in the anterior or post- implant diameter on its survival: a meta-analysis based on comparison to the diameter-reduced implants. erior region. There is no significant difference prospective clinical trials. J Periodontol 2014;85:569-580. Possible parameter, which may influence the Neugebauer J, Vizethum F, Berger C, Bolz W, Bowen A, between standard and diameter-reduced implants. development of the peri-implant bone level Deporter D, et al. Update: Kurze, angulierte und Main risk factor for peri-implant bone level change durchmesserreduzierte Implantate - Praxisleitfaden : 11. change should be detected. might be the use of grafting materials and grafting Europäische Konsensuskonferenz (EuCC). BDIZ/EDI Konkret 2016;20:88-90. technique.

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