Über den Autor

Dr. Mischa Krebs

Dres. Krebs Oralchirurgie/ Implantologie/ Paradontologie
Schillerplatz 3
55232 Alzey
+49 6731-2532


  • Fachzahnarzt für Oralchirurgie
  • Tätigkeitsschwerpunkt Implantologie (LZK / DGI)
  • Praxis Dres Krebs Alzey Oberarzt der Poliklinik für Zahnärztliche Chirurgie und Implantologie der Goethe Universität Frankfurt am Main
  • Dozent für den Master of Oral Implantology der Goethe Universität Frankfurt a. M.
  • Akademische Lehrpraxis der Goethe Universität F.a.M. für den Master of Oral Implantology
  • Dozent der Zahntechniker Meisterschule Frankfurt am Main


  • 2001 Staatsexamen in Mainz
  • 2002 Promotion in Mainz
  • 2001-2002 Ausbildungsassistent Praxis Dr. Krebs Alzey
  • 2002-2004 Weiterbildungsassistent Oralchirurgie Dr.Dr. Hessling, Dr. Dr. Gerhardt, Bocholt
  • seit 2004 Poliklinik für zahnärztliche Chirurgie & Implantologie, Frankfurt am Main
  • 2005 Fachzahnarzt für Oralchirurgie
  • 2006 TSP Implantologie
  • 2006 Oberarzt & stellvertretender Abteilungsleiter
  • seit 2006 Regelmäßige Referententätigkeit an der Uniklinik Frankfurt zu den Themen Oralchirurgie & Implantologie
  • seit 2006 Prüfer im Staatsexamen für die Fächer Oralchirurgie und ZMK
  • seit 2006 Referent des Curr. Implantologie der LZK Hessen
  • 2007 Niedergelassen in oralchirurgischer Gemeinschaftspraxis Dres Krebs Alzey
  • seit 2007 Mitglied im RAZ
  • seit 2007 Hospitations- & Supervisionspraxis des Curr. Implantologie der LZK Hessen
  • seit 2009 Dozent des Master of Oral Implantology (MOI) der Goethe Universität Frankfurt
  • seit 2010 Hospitations- & Supervisionspraxis des Curr. Implantologie der DGI
  • seit 2011 Dozent an der Zahntechniker-Meisterschule Frankfurt a. M.
  • 2012-2015 Präsident des RAZ (Rheinhessischer Arbeitskreis Zahnärzte)
  • 2014 Peers Förderpreis 2014 best publication
  • 2015 Communications Commitee oft he DDS (Digital Dentistry Society)


regelmäßige Referententätigkeit auf nationalen wie internationalen Kongressen
Autor und Mitautor zahlreicher wissenschaftlicher Publikationen


Implantologische Kernthemen

  • Computerassistierte Implantologie and CAD-CAM prothetische Rekonstruktionen
  • Sofortimplantation und -versorgung
  • Langzeiterfolg von dentalen Implantaten
  • Allogene Blockaugmentationen


Prof. Dr. Georg-Hubertus Nentwig

Immediate Implant placement in palatal roots of maxillary molars


Background and Aim

Immediate implant placement and immediate loading of single-tooth implants are reliable treatment options with high implant survival rates and good long-term results. Because of the anatomy of the roots immediate implant placement is usually performed in incisors, canines and premolars.

If performed in molars the authors usually suggest to place the implant in the septa between the roots.

In the majority of cases the vertical height in between the roots is insufficient for implant placement. In those cases a sinus-lift procedure after the healing of the socket is inevitable. The aim of the described workflow is to avoid a second invasive surgical intervention to place an implant together with sinus grafting procedures by immediate implant placement in the palatinal root.


Tooth 16 in a 45 year old female could not be preserved. The X-ray showed the sinus reaching in between the roots. The perio-status was without pathological findings.

Materials and Methods

After separating the roots to avoid fractures in the surrounding bonywalls the extraction could be performed without complications. The implant bed was prepared without any rotating instruments. Drills might probably destroy the thin bony walls supporting the palatinal root, which would avert the possibility of immediate implant installation. The conical reamer was gently pushed upwards using an instrument for vertical condensation (Ustomed Germany) and a hammer. The gap of the bukkal roots was filled with a slow resorbing bovine bone substitute material. An ANKYLOS - STANDARD B abutment was inserted and a simple provisional crown was produced chair side to support the soft-tissue architecture. Six weeks after implant insertion an impression with a reposition post was performed and an individual two-piece abutment on a titanium base was produced. The final zirconia crown was inserted 8 weeks after implant placement.


The final picture shows the excellent preservation of the soft-tissue architecture 2 years after implant installation. The panoramic x-rayshows the appositional bone reaction around the implant due to bone training and the natural reaction of the bone on raising loads (Wolff‘sches Law).


Through the placement of the implant in the palatinal root a secondsurgery could be avoided. Furthermore the patient did not have to undergo a sinus lifting procedure. This increased the patient comfort by reducing appointments, treatment time and morbidity.