The 2023 Donald B. Osbon Memorial Lecture will be held on Saturday, April 22, 2023, in the Galagan Auditorium on the 1st floor of the University of Iowa College of Dentistry. This event qualifies for 6 hours of CE re-licensure credit and is free to participants who pre-register. If you would like to attend the dinner following the lecture, pre-payment and pre-registration is required. Registration closes on April 10, 2023.

The keynote speaker will be Dr. Daniel A. Buser.  Dr. Buser is one of the most experienced international implant surgeons with 35 years of surgical experience. He widely lectures at national and international conferences. He has been Professor of Oral Surgery at the University of Bern, Switzerland (2000-19). He served as President of the EAO (1996/97) and the ITI (2009-13). He has received the Andre Schroeder Research Prize by the ITI (1995), the Daniel M. Laskin Award (1996), the Honorary Membership Award by the AAP (1997), the Branemark Osseointegration Award by the AO (2013) and the ITI Honorary Fellowship (2017). With his team, he has authored and co-authored more than 400 publications and book chapters on translational research in the field of implant dentistry. He is also Editor and the main author of the famous GBR Book by Quintessence which was published in its 3rd edition in November 2021.

Lecture Abstracts

Lecture I: Surgical principles and how to use GBR for successful outcomes with long-term stability

This lecture will present the development of GBR procedures in implant patients since the late 1980’s. During the development phase, different biomaterials including barrier membranes, bone grafts and bone substitutes were tested, and surgical techniques constantly improved to optimize treatment outcomes and reduce post-surgical complications with GBR procedures. Since the millennium change, a phase of fine-tuning efforts started. Significant progress was based on a much better understanding of the related tissue biology including the post-extraction ridge alterations and the principle of bone conditioned medium. Today, implant placement with simultaneous GBR procedures is done with Contour Augmentation using a 2-layer composite graft with locally harvested bone chips and a low-substitution bone filler, such as DBBM (deproteinized bovine bone mineral). The autograft bone chips stimulate bone formation during initial healing, whereas DBBM particles (Bio-Oss) offer excellent volume stability over time. The two synergistic bone fillers are covered by a resorbable collagen membrane. The membrane provides a temporary barrier function and stabilizes the applied bone fillers. The surgery is completed with a tension-free, primary wound closure. The surgical procedure will be presented with different case reports. A special emphasis is given to esthetic sites in the anterior maxilla and to implant sites in the posterior mandible. The GBR technique will also be documented by clinical and radiographic long-term cases and studies using CBCT up to 10-years of follow-up.

Lecture II: Implant placement post extraction: When immediate, when early and when late?

The timing of implant placement post extraction in the esthetic zone is a critical decision, since it influences the predictability of esthetic outcomes. The treatment options have been defined by the ITI in 2004 with immediate, early and late implant placement. These options are presented in light of the post extraction ridge and soft tissue alterations, which are much better understood today. Immediate Implant Placement is only used in ideal anatomic sites with a thick facial bone wall (> 1mm) and a thick gingival biotype. Then, flapless implant placement is preferred with an internal grafting of the gap between the implant surface and facial bone wall. The correct implant positioning is facilitated with Computer Assisted Implant Surgery (CAIS) using the latest developments of digital technology. Thus, this approach is surgically demanding and rarely feasible due to anatomic limitations (5-10%). Early Implant Placement is most often used (>80%), when the facial bone wall is thin or deficient. Then, a healing period post extraction of 4 to 8 weeks is used allowing for a spontaneous soft tissue thickening. Implant placement is done with an open flap procedure. It’s combined with a simultaneous Contour Augmentation using a 2-layer Composite Graft with locally harvested autograft chips and DBBM, combined with a collagen membrane. This technique is well documented with excellent clinical results up to 10 years. Late Implant Placement is rarely necessary in the esthetic zone (<10%), for patient or site specific reasons. If indicated, extraction is combined with socket grafting using a low-substitution filler such as DBBM to limit the extent of local atrophy. After at least 6 months of healing, implant placement most often requires a simultaneous bone augmentation procedure, if the patients has high esthetic expectations. Late implant placement is often used in posterior sites following socket grafting.

Lecture III: GBR procedures in complex cases

This lecture will address complex cases for GBR procedures, in particular implant therapy in sites with multiple missing teeth in the esthetic zone. Aspects of pre-operative examination and various treatment options will be discussed in sites with two, three or four missing adjacent teeth.

Lecture IV: How to fix Esthetic Implant Failures

The utilization of dental implants in the esthetic zone is a challenge for involved clinicians. With the increasing application of dental implants by general practitioners, the occurrence of esthetic failures with implant supported restorations is raising. This lecture will address the causes for such esthetic failures and the surgical approach for therapy. The most relevant cause for esthetic failures is the facial malposition of the implant in the crestal area of the alveolar process. In most cases, implant removal is necessary, which must be done with a low-trauma technique to avoid additional bone loss. Today, this is done with special implant removal instruments using the Reverse Torque Technique. In addition, these failures are often characterized by a lack of keratinized mucosa. The current strategies for the reestablishment of keratinized mucosa and for the augmentation of missing bone, mainly on the facial aspect are presented and documented with case reports. This includes aspects of timing, sugical techniques, and the selection of appropriate biomaterials. In addition, the utilization of pink ceramics is often considered in sites with multiple missing teeth.

2023 Donald B. Osbon Lecture is Sponsored By:

ADA CERP is a service of the American Dental Association to assist dental professionals in identifying quality providers of continuing dental education. ADA CERP does not approve or endorse individual courses or instructors, nor does it imply acceptance of credit hours by boards of dentistry.