IPS Implants® Preprosthetic

IPS Implants®

IPS Implants® Preprosthetic

The IPS® family now includes IPS Implants® Preprosthetic. The Department of Oral and Maxillofacial Surgery at the Hannover Medical School (MHH) has developed a functionally stable framework implant. It is manufactured using a 3D laser melting process. Since 2015, more than 52 patients have already opted for IPS Implants® Preprosthetic and can benefit from the advantages of the new immediate dental rehabilitation. We are the clinic's cooperation partner.

Conventional, dental implantology is an established option for dental rehabilitation, as long as the individual bone and soft tissue are sufficient. In the case of major tissue loss or replacement, however, conventional methods are limited. This is precisely where the new possibilities with IPS Implants® Preprosthetic offer an excellent extension to achieve functionally stable immediate dental rehabilitation independent of the jaw region.

The implant offers high stability with comparatively moderate treatment costs and significantly shorter treatment duration.
IPS Implants® Preprosthetic can be individually adapted to the patient situation by means of shape-free fabrication in combination with conventional fabrication procedures. The framework structure and the post length can be individually adapted to the defect situation. The useful supra structure can be fixed to the posts using a rotation-stable cone with or without screws.


  • Extreme atrophy or loss of jawbone
  • Individual limiting factors
  • Trauma patients
  • Reconstructions necessitated by tumors, ulcers or cysts

Surgical technique | 8 steps to functionally stable immediate dental rehabilitation

1. Virtual planning

To create the case, the patient data and case-related information are uploaded to the web-based platform IPS Gate®. The data is prepared by the IPS® developer for case planning on the basis of the user's requirements and information. An integrated chat function and web meetings are available for direct communication between the IPS® developer and user. With the clinical specifications and requirements the number and position of the posts are defi ned. If necessary, the anatomical region is mirrored. Subsequently, a patient specifi c optimized implant is generated. In the end, the user approves the design for production.

2. Pre-surgical presentation

Initial situation after resection of a benign tumor and soft tissue reconstruction by a "M. latissimus dorsi" transplant.

3. Implantation preparation

The surgery situs in the right midface is opened intraorally. A remote fi xation is even more important because of the missing right maxilla. The soft tissue is dissected from the previously defi ned bony structures.

4. Implant fixation

The implant is inserted into the surgery situs and fi ts exactly and precisely due to the patient specifi c construction. The IPS® scaff olding base is fi xed functionally stable and multi-vectorial with standard (Ø 1.5 mm or Ø 2.0 mm) and/or locking screws (Ø 2.0 mm) depending on the planning. Upon request and depending on the intraoperative conditions not every fi xation possibility in the implant has to be used with a screw.

5. Post passage creation

Creation of the post passages through the soft tissue. At the same time, the precise position can be relevant not to impair the anatomical entities.

6. Soft tissue situation

The rotation-stable telescopes of the posts may not be covered by soft tissue after wound closure.

7. Temporary denture fixation

Last, the temporary denture is fixed per post intraoperatively on IPS Implants® Preprosthetic with the supplied IPS® screw denture fixation. Please pay attention of enough space between the soft tissue and the denture because pressure on the soft tissue can be created by postoperative tissue swelling. Upon request the temporary denture can be created with or without occlusion contact.

8. Postoperative production and fixation of the final denture

After reduction of swelling the intraoral situation is taken by impression compound or an intraoral scanner and the screw-on bar and removable final denture is produced afterwards. Through the digital planning and manufacturing workfl ow of IPS Implants® Preprosthetic, a bar with the die can be produced beforehand, simplifying the manufacturing of the final denture.

Case studies | Treatment in one quadrant

Treatment of the right maxilla after hemimaxillectomy with one IPS Implants® Preprosthetic without a bone transplant.

Treatment of the left mandible with one IPS Implants® Preprosthetic. By preceding reconstruction a fibula transplant and an IPS Implants® Mandible Reconstruction are in situ.

Treatment of the mandible with one IPS Implants® Preprosthetic after preceding mandible reconstruction left with a double barrel fibula transplant for bony restoration.

Case studies | Treatment in two quadrants

Treatment of an atrophic maxilla

Treatment of an atrophic maxilla with two IPS Implants® Preprosthetic without transplantation. Alternatively, a construction with a connection bridge and consequently a one-piece implant is possible.

Treatment of the mandible with one IPS Implants® Preprosthetic

Treatment of the mandible with one IPS Implants® Preprosthetic. By preceding reconstruction a fibula transplant and an IPS Implants® Mandible Reconstruction are in situ.


Rahlf, B., P. Korn, AN. Zeller, S. Spalthoff, P. Jehn, F. Lentge, and NC. Gellrich. 2022. Novel approach for treating challenging implant-borne maxillary dental rehabilitation cases of cleft lip and palate: a retrospective study. International Journal of Implant Dentistry 8 (6).

Spalthoff, S., M. Borrmann, P. Jehn, B. Rahlf, NC. Gellrich, and P. Korn. 2022. Comparison of conventional and digital workflow for dental rehabilitation with a novel patient-specific framework implant system: an experimental dataset evaluation. International Journal of Implant Dentistry 8 (4).

Korn, P., NC. Gellrich, P. Jehn, S. Spalthoff, and b. Rahlf. 2021. A New Strategy for Patient-Specific Implant-Borne Dental Rehabilitation in Patients With Extended Maxillary Defects. Frontiers in Oncology.

Korn, P., NC. Gellrich, S. Spalthoff, P. Jehn, F. Eckstein, F. Lentge, A. N. Zeller, and B. Rahlf. 2021. Managing the severely atrophic maxilla: Farewell to zygomatic implants and extensive augmentations? Journal of Stomatology, Oral and Maxillofacial Surgery.

Gellrich, NC., P. Korn, P. Jehn, F. Lentge, M. Schiller, and B. Rahlf. 2020. Versorgung extrem atrophierter Oberkiefer durch ein neues alternatives Verfahren. Quintessence Publishing Deutschland. Implantologie 2020 (4): 345-359.

Jehn, P., S. Spalthoff, P. Korn, M. Stoetzer, M. Gercken, NC. Gellrich, and B. Rahlf. 2020. Oral health-related quality of life in tumour patients treated with patient-specific dental implants. International Journal of Oral & Maxillofacial Surgery 49 (8): 1067-1072.

Gellrich, NC., B. Rahlf, R. Zimmerer, PC. Pott, and M. Rana. 2017. A new concept for implant-borne dental rehabilitation; how to overcome the biological weak-spot of conventional dental implants? Head Face Med 13 (17).

Gellrich, NC., R. Zimmerer, S. Spalthoff, P. Jehn, PC. Pott, M. Rana, and B. Rahlf. 2017. A customised digitally engineered solution for fixed dental rehabilitation in severe bone deficiency: A new innovative line extension in implant dentistry. Journal of Cranio-Maxillofacial Surgery 45 (10).

More news on IPS Implants® Preprosthetic

April 27, 2020 | Dental Tribune

Interview: IPS Implants® Preprosthetic is "a useful addition for a specific patient group"

Univ.-Prof. Dr. Dr. Nils-Claudius Gellrich (on the right) and Dr. Björn Rahlf (on the left) have already treated 47 patients with our IPS Implants® Preprosthetic enabling functionally stable immediate dental rehabilitation even in case of massive bone loss and independent of the jaw region. In an interview with the dental tribune, they report on the product development, application and their experiences with our patient-specific implants for preprosthetic treatment.

Picture credits: MHH, CMF Surgery, V. Pawlaczyk


What do I need to take into account when planning IPS Implants® Preprosthetic? 

The Implant design has to be based necessarily on the following criteria: 


Functionally conditions 

  • Bite situation 
  • Mouth opening 
  • Opposite jaw situation 
  • Separation of anatomical units 


Anatomical conditions 

  • Soft tissue coverage and coating 
  • Bone supply and anchoring possibilities 
  • Distance to existing metal structures like dental implants, osteosynthesis plates, mesh, etc. 


Therefore, only 3D data based planning is - just like for every complex surgical prosthodontic treatment for dental rehabilitation - not sufficient alone and only one element. Furthermore the strategy for the dental rehabilitation should be rather defensive. E.g. the dentition should be planned just up to the 2nd premolar or to the 1st molar depending on the mouth opening and the soft tissue situation. For example the anatomical units in the lower oral cavity area between the cheek, vestibulum, oral cavity and tounge are not separated through an immobile and thick enough soft tissue coating so that the mobile inner cheek is confluencing with the tounge underside. In this case there has to be a soft tissue separation through tissue transplantation. But this would be also necessary for the conventional dental implant born prosthodontic treatment. 

It is recommended to leave at least 6 months between the radiotherapy and the implant insertion. 

In general, there should be no cemented denture manufactured onto IPS Implants® Preprosthetic. Instead, the conditional removable prosthodontic solution (e.g. bar or cone anchored) should be preferred. 

If the patient has to receive radiotherapy after surgery will the presence of IPS Implants® Preprosthetic lead to any issues? 

The same risks apply to IPS Implants® Preprosthetic as for plate osteosynthesis. However, special care must be taken to ensure that the posts passing through the soft tissue are adequately covered with soft tissue. The same principles apply for anchoring as for plate osteosynthesis, since the screw connections are located far from the post passage. The influence of irradiation or interaction with the bone can be seen in the article by Stoll/Wächter, which was published very early.

Compared to conventional dental implants, IPS Implants® Preprosthetic still offers the advantage that the soft-tissue emergence point is not directly located at the bone-borne anchorage during radiation therapy. This advantage leads to better shielding. 

Required osteosynthesis accessories

For surgical treatment with IPS Implants® Preprosthetic the following osteosynthesis accessories are required:

  • Sufficient number of KLS Martin Osteosynthesis screws in the planned diameters and lengths
  • A screwdriver suitable for the planned osteosynthesis screws
  • A predrill suitable for the planned osteosynthesis screws

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Legal basis for IPS Implants®

According to the regulations of the MPG (Medical Device Act) §3 Sentence 8, a custom-made product is a medical device manufactured on prescription according to specific design specifications and which is intended for the exclusive use for a named patient. For this reason a separate inquiry is necessary in every case.

The written prescription is a release for the technical offer (design of the products). This is to be submitted in writing by the user at the same time as the required order for the economic offer if he/she agrees with the desired case planning.

Shipment is not permissible as a matter of principle without this mandatory regulatory document.

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