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WEDNESDAY 2 JULY 2025
12:30pm
Innovation & Technology
Hall A
Beginner
We care for more than 200 thousand exhibits spanning billions of years and welcome more than five million way
visitors annually.
09:15
Intake
10:00
Karin Becktor
The relationship between Transient Apical Breakdown and orthodontics
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Dr Karin BecktorPrivate practise limited to orthodontics and oral surgery, Copenhagen, Denmark
The aim of the presentation is to clarify if there is relationship between Transient Apical Breakdown (TAB) and orthodontic treatment.
Force application to a tooth during orthodontic treatment evokes a biological response to the periodontal ligament (PDL) and the dental pulp. Numerous studies have described the reaction of the PDL, fewer have dealt with pulpal changes.
The pulpal response to orthodontic forces involves cell damage, inflammation and wound healing which are process that could adversely affect the dental pulp. A consequence of the injury to the pulp tissue could be: Transient Apical Breakdown (TAB). The breakdown process is related to the type of injury and the stage of root development. It is usually caused by moderate injuries to the pulp such as subluxation, extrusions and lateral luxations or as a result of orthodontic treatment and occlusal trauma. The crown may display some discoloration and radiographical a periapical radiolucency associated with the affected tooth. The discoloration and apical lesion frequently later resolve itself without complications. Therefore, no endodontic treatment is needed.
The exact mechanism of TAB is not fully understood. Clinically however misdiagnosis may result in unnecessary endodontic treatment.
Cases with TAB in relation to orthodontic treatment will be presented and methods for diagnosis and treatment will be discussed.
10:30
Stella Chaushu
Impacted teeth: factors affecting prognosis, duration and outcome
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Prof Stella Chaushu, DMD PhDOrthodontist, Jerusalem, Israel
Treating impacted teeth presents a significant clinical challenge, often with less predictable outcomes compared to routine orthodontic cases. While the literature includes numerous studies and case reports on mild to moderate canine impactions, there is a relative scarcity of evidence addressing severe canine impactions and other types of impacted teeth. Severe impactions often disrupt the eruption and alignment of neighboring teeth, contributing to broader malocclusions. In addition, they may affect skeletal development due to restricted alveolar bone growth around the unerupted tooth. Root development of the impacted tooth can also be compromised due to its prolonged presence in a non-eruptive environment. Early diagnosis and appropriate timing of intervention are crucial for minimizing complications and optimizing treatment outcomes. A well-timed, individualized approach can reduce risks to the impacted tooth, adjacent dentition, and facial growth.
Participants will learn to:
- Recognize the consequences of delayed diagnosis on the impacted tooth, neighboring teeth, and overall dento-skeletal development
- Determine the optimal timing for initiating orthodontic eruption of various impacted teeth
- Design and implement effective mechanotherapy strategies for successful management of complex impactions
11:00
Coffee break
11:30
Marjolijn Gilijamse
The dogtooth astray, the unfavorable impacted lower canine
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Marjolijn GilijamseOral and Maxillofacial Surgeon, Amsterdam, The Netherlands
- impaction or transmigration of the mandibular canine is rare
- autotransplantation of transmigrated mandibular canines is a reliable treatment option
- it all starts with case selection
- if you can remove it, you can use it
- collaboration is the key to success
12:00
Simon Littlewood
Does remote artificial intelligence have a place in the orthognathic patient journey
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Simon LittlewoodOrthodontist, Bradford, UK
• manage expectations
• identify aetiology
• choose appropriate treatment
• choose retainers carefully
12:30
Lunch break
13:30
Aranzazou Senosiain
Bone-anchored orthopedics for class 3 patients
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Prof.dr. Aranzazu SenosiainOrthodontist, Madrid, Spain
Class III malocclusions pose significant challenges in orthodontic treatment, particularly when managing borderline cases that lie at the threshold between orthodontic and orthodontic-surgical intervention.
Skeletal anchorage has revolutionized the management of Class III malocclusions, offering a more stable and effective solution compared to traditional methods. This presentation will explore the use of skeletal anchorage, specifically focusing on mandibular plates systems and MARPE (Maxillary Anterior Rapid Palatal Expansion), in the treatment of Class III patients. These techniques allow for controlled and predictable skeletal movement, and avoids dentoalveolar compensations. Through clinical case examples, the advantages, limitations, and potential complications of skeletal anchorage with plates and MARPE will be discussed, providing insight into the future of Class III treatment protocols.
14:00
Yijin Ren
Bimaxillary Modification with Bone Anchored Protraction in Patients with Cleft Lip and Palate
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Prof. dr. Yijin RenOrthodontist, Groningen, The Netherlands
Bone Anchored Maxillary Protraction (BAMP) has proven to be an effective alternative for treating mild to moderate Class III malocclusion in growing individuals. This lecture aims to provide a comprehensive understanding of the indications and contraindications for BAMP treatment in patients with cleft lip and palate. To this end, clinical and research outcomes will be presented from a fifteen-year experience at a single center regarding the use of BAMP in patients with cleft lip and palate, with a follow-up period of up to five years.
14:30
Lydia Lim
Distraction Osteogenesis of the Cleft Maxilla with simultaneous mandibular osteotomy
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Dr Lydia LimOral and Maxillofacial Surgeon, Sydney, Australia
• Orthognathic surgery for the severe cleft deformity can be very challenging and conventional orthognathic procedures are often not possible due soft tissue scarring and high degree of relapse
• Distraction Osteogenesis is a valuable tool, however, Intra-oral distraction appliances has the problem of vector control and sometimes, a 2nd stage osteotomy is required to achieve satisfactory results.
• This presentation will discuss a strategy for a single stage Bimaxillary orthognathic surgery using distraction osteogenesis with internal maxillary distractors. The rationale for simultaneous mandibular osteotomy to achieve improved facial aesthetic outcomes will also be discussed. The results of 10 consecutive patients will be reviewed.
15:00
Lorenzo Trevisiol
Condylar bi-vectoral seating in orthognathic surgery: Assessment of accuracy and long-term stability with aid of A.I.
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Prof. Lorenzo Trevisiol, MD, Maxillo-Facial SurgeonOral and Maxillofacial Surgeon, Trento, Italy
- A proper stable condilar position is a pillar for long-term stability in orthognathic surgery
- The role of intraop condilar positioning is still underestimated and a wide consensus does not exist in the scientific literature regarding the protocols to be used in order to achieve it
- Modern technologies allow surgeons to study in details changes in condilar position and morphology after
- This lecture will analyse the results achieved with a strict surgical protocol of condilar repositioning in orthognathic surgery. Factors involved in relapse will be analyzed, trying to provide to the audience suggestions useful for a succesful surgery. surgery
15:30
Tea break
16:00
Benedict Wilmes
Open bite treatment: surgery versus molar intrusion.
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Benedict WilmesOrthodontist, Dusseldorf, Germany
Recently, skeletal anchorage devices have been used as anchorage units for upper molar intrusion as a way of correcting an anterior open bite malocclusion. To avoid the surgical procedures associated with the placement of miniplates in the zygomatic area, mini-implants may be inserted palatally or buccally in the alveolar process. However, consideration must be given to the potential risks of root damage and a higher failure rate associated with the placement of temporary anchorage devices (TADs) in the interradicular area. The anterior hard palate provides a safer and more stable alternative for TAD placement. This lecture describes the biomechanical principles and the clinical procedures of ‘Mousetrap’ mechanics using mini-implants in the anterior palate for upper molar intrusion. The stomatognathic response of maxillary molar intrusion is an autorotation of the mandible and so the sagittal implications for each patient must be considered.
16:30
Adaia Valls
Surgically assisted MARPE (SAMARPE), when and how?
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Adaia Valls Ontañón MD, DDS, PhD, MSc, FEBOMSOral and Maxillofacial Surgeon, Barcelona, Spain
- There is still no consensus on the age limit for non-surgical maxillary expansion: individual assessment is required.
- Minimally invasive surgically assisted maxillary expansion is a low morbidity and safe procedure.
- Bone anchored and custom-designed devices are preferable to expand the midpalatal suture.
17:00
Gabrielle Millesi
The designed preoperative digital occlusion defines the protocol and timing of OGS Surgery.
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Gabrielle MillesiOral and Maxillofacial Surgeon, Vienna, Austria
3D virtual planning and digital workflow have become standard in orthognathic surgery. These new technologies have a major impact on timing of the surgical procedure by designing the desired digital occlusion in advance as well. In combination with robotically bent archwire techniques, the digital definition of the desired occlusion and the alignment of the dental arches, together with the orthodontist, allow a timewise prediction of the overall treatment plan. According to the parallel created virtual check of the existing or achieved occlusion on the way, by colour-mapping, the perfect timing for surgery can be defined, whether Surgery First, Surgery Early or Orthodontics First is feasable. The final decision whether maxillary segmentations are needed, also depends on this simulation. This virtual planning gives precise information on the length of the overall treatment also for the patient. All these arguments will be underlined and explained by showing clinical cases.
17:30
Rafaele Spena
Orthodontic and surgical management of complex ectopic teeth
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Rafaele SpenaOrthodontist, Ferrara, Italy
1. Complex ectopic teeth are too often treated with compromised solutions or even extracted today
2. Esthetics and patient’s comfort during treatment too often prevails on final periodontal and dental result
3. Proper surgical management during exposure depending on the position is mandatory
4. Proper biomechanical decisions are essential to increase success and reduce risks of damaging roots or creating periodontal problems
5. Some clinical examples will be part of the presentation
18:00
Drinks
THURSDAY 3 JULY 2025
08:30
Intake
09:00
Ravindra Nanda
Shape memory aligners and applications with Surgery First
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Ravindra NandaOrthodontist, Farmington, CT, USA
Shape memory 3D printed aligners have numerous advantages such as shape driven force system, light sustainable force, and ability to make them in- house. This presentation will show this technology can be adapted to Print aligners in- house immediately before or after the surgery.
09:30
Stella Chaushu
Surgical exposure of impacted teeth - small nuances make a big difference
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Stella ChaushuOrthodontist, Jerusalem, Israel
The surgical approaches for exposing impacted teeth vary widely, each tailored to the individual clinical situation. The choice of technique influences both the esthetic and functional outcomes, as well as the long-term prognosis. Successful treatment requires close collaboration between the orthodontist and the maxillofacial surgeon to ensure the impacted tooth is brought into optimal alignment—indistinguishable from its normally-erupted neighbors. This presentation will highlight the critical role of interdisciplinary planning and explore common clinical dilemmas, including: when is a surgery-first approach preferable? how is the ideal surgical modality selected—and by whom? what adjustments are needed in cases with severely resorbed adjacent teeth? how can surgical pitfalls be anticipated and avoided?
Participants will learn to:
- Identify and avoid surgical pitfalls through coordinated planning with the surgeon
- Tailor the surgical approach to the specific clinical needs of each case
- Recognize situations where a surgery-first sequence improves outcomes
10:00
Flavia Artese
Surgery first: Friend or Foe?
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Flavia ArteseOrthodontist, Rio de Janeiro, Brazil
Orthodontic preparation for orthognathic surgery has evolved significantly throughout the history of our specialties. Until the 1970s, no orthodontic preparations were utilized. Later, all cases required decompensation for surgery. Recently, the concept of "surgery first" has brought notable changes to the surgical patient's experience, particularly regarding quality of life. The idea behind the surgery-first approach is to correct the skeletal discrepancy before addressing the malocclusion. This approach became feasible with the advent of skeletal anchorage and it necessitates a different reasoning in treatment planning, which will be discussed in this presentation. The most favorable indications for the surgery-first approach will also be presented, along with a comparison between the facial results of conventionally treated cases and those treated using the surgery-first method. The advantages and disadvantages of the surgery first approach will be discussed, since the decision to perform surgery first in surgical treatments is a topic of considerable debate. It involves weighing the risks and benefits, understanding the patient's specific needs, and considering the potential outcomes.
After this lecture you will be able to:
a) Acknowledge the guidelines for planning surgery-first
b) Evaluate the facial outcomes of surgery-first and conventional surgical treatment methods.
c) Understand the best indications for a surgery-first approach in surgical treatments.
10:30
Coffee break
11:00
Federico Hernandez Alfaro
Bram Tuinzing Memorial Lecture: Low impact orthofacial surgery: the patient first
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Federico Hernandez AlfaroOral and Maxillofacial Surgeon, Barcelona, Spain
We have coined the concept of “Low Impact Orthofacial Surgery” (LIOS) as an Holistic approach to jaw surgery aimed at minimizing the physical, emotional, and social impact on the patient.
This approach involves several strategies and techniques designed to reduce pain, swelling, and recovery time while enhancing the overall patient experience.
In this lecture I will discuss our strategies intended to make the surgical process safer, more efficient, and less burdensome, ultimately leading to better patient satisfaction and outcomes.
12:00
Mike Leung
Back to the basics: Le Fort 1 made easy!
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Mike LeungOral and Maxillofacial Surgeon, Hong Kong, China
Le Fort 1 osteotomy is the most versatile maxillary orthognathic procedure
The technique will be described in a step-by-step guide for young surgeons
Some tips and tricks in performing a safe and predictable Le Fort 1 Osteotomy will be shared
Special technique to perform maxillary setback will be described in a stepwise manner
12:30
Lunchbreak
13:30
Jean-Pierre Ho, Petra Zuurbier, Ruud Schreurs
Interdisciplinary skeletal-OSA treatment: Integrating Orthodontics, 3D planning, and Maxillofacial Surgery
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Jean-Pierre HoOral and Maxillofacial Surgeon, Amsterdam, The Netherlands -
Petra ZuurbierOrthodontist, Heemstede, The Netherlands -
Ruud SchreursHead 3D Lab, Amsterdam, The Netherlands
- Importance of interdisciplinary collaboration
- Integrating a computer-assisted workflow for customizing treatment planning
- The role of virtual surgical planning (VSP) in simulating treatment outcomes.
- Pre-surgical orthodontic preparation to optimize maxillofacial outcomes.
14:30
Raquel Guijarro Martinez
The challenge of facial asymmetry. Tips to opt for success.
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Raquel Guijarro MartinezOral and Maxillofacial Surgeon, Valencia, Spain
- Enhanced Recovery After Surgery (ERAS) protocols represent a global package of perioperative multidisciplinary care pathways that encompass pre, intra, and postoperative techniques aimed at reducing postoperative morbidity, improving patient perception, and reducing hospital stay.
- While these programs are already a standard practice in many surgical fields, they are still incipient in orthognathic surgery.
- This lecture will cover the specific perioperative care strategies with sufficient and updated evidence to be incorporated in our everyday workflow.
15:00
Tea break
15:30
Aranzazu Senosiain
Compromising situations in orthognathic surgery, how to manage them
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Aranzazu SenosiainOrthodontist, Madrid, Spain
Orthognathic surgery is a complex procedure often performed to correct jaw deformities and improve functional and aesthetic outcomes. Despite its effectiveness, it can present several complications, which may include infection, nerve injury, relapse, and malocclusion. This lecture explores the common complications associated with orthognathic surgery and offers insights from the orthodontist's perspective for resolving these issues like the use of skeletal anchorage systems, and precise coordination with the surgical team.
16:00
Gabrielle Millesi
The tongue, friend or enemy in OGS?
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Gabrielle MillesiOral and Maxillofacial Surgeon, Vienna, Austria
Overview of the physiological functions of the tongue, highlighting:
- Articulation:
Importance of position, angulation and length of upper incisors in regards of short face syndrome, protrusive incisors, open bite deformities. - Swallowing, tongue thrust:
Compromised transverse width, high vault , maxillary retroposition, proclined and flaring of the lower incisors, lateral and frontal open bites. - Airway
Role of the tongue in OSA patients.
Consequences of all these observations on the surgical treatment protocol (segmentation of the maxilla, SARPE, which jaw to operate, reduction of the tongue) and adjunctive procedures like speech therapy, frenectomy. The importance of the findings for the orthodontic treatment and stability of the final outcome? Some thoughts to lingualis injuries during OGS.
All these considerations will be discussed based on case presentations.
16:30
Raquel Guijarro Martinez
A holistic approach to the correction of gummy smile
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Raquel Guijarro MartinezOral and Maxillofacial Surgeon, Valencia, Spain
- Excessive gingival display is a common finding in patients who exhibit dentoskeletal disharmony.
- However, it is a mistake to manage all gummy smile cases with a similar hard tissue approach. In fact, the tendency to overlook soft tissue-related causes and to overcorrect skeletally has the risk to produce a prematurely-aged face.
- This lecture will cover the fundamental diagnostic points to identify the different types of gummy smile, interdisciplinary variables to establish accurate treatment objectives, and key surgical tips to achieve optimal results.
17:00
Drinks
17:30
Depart to Zandvoort - BBQ at The Beach – Beach house Kayuca Zandvoort
18:00
Depart to Zandvoort
BBQ at The Beach – Beach house Kayuca Zandvoort
FRIDAY 4 JULY 2025
08:30
Intake
09:00
Johan Reyneke
The Art and Science of the Sliding Genioplasty
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Johan ReynekeThe Art and Science of the Sliding Genioplasty
- Genioplasty is not a substitute to mandibular surgery .
- The shape of the chin is more important than the position of Pogonion.
- The angle of the osteotomy will influence the postoperative height of the chin.
- The height of the osteotomy will influence the depth and shape of the labiomental fold.
- Facial proportions are more important than cephalometric values use as guides to aesthetic planning of genioplasty.
- Special care should be given to muscle preservation and re-approximation during genioplasty procedures.
09:30
Flavia Artese
Facial Asymmetry: What are the Limits?
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Flavia ArteseOrthodontist, Rio de Janeiro, Brazil
Facial asymmetry can be caused by various factors, and according to its etiology, severity may vary, and therefore treatment can be orthodontic only, or evolve to a surgical treatment. Investigators have tried to classify, characterize and measure asymmetry, but subjective aspects of its perception render the assessment more difficult. The relationship between facial attractiveness and slight facial asymmetries seems relevant for clinicians dealing with dental-facial problems. Nonetheless, the point where facial asymmetry becomes more clearly noticeable is not well defined, proving to be difficult to tell when an asymmetry really starts to become socially apparent. The purpose of this presentation is to describe how facial asymmetry can be currently treated, and to discuss the current knowledge on perception of facial asymmetry and how this should be approached in daily practice.
After this lecture you will be able to:
a) understand the psychological importance of facial symmetry
b) recognize different modalities of treatments for facial asymmetries according to its etiology
c) discuss patient’s perception of minor facial asymmetry and its impact on daily practice
10:00
Mike Leung
Challenges and controversies in managing facial asymmetries
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Mike LeungOral and Maxillofacial Surgeon, Hong Kong, China
Facial asymmetries are common facial deformities and are often a main drive for patients to receive orthognathic surgery.
Apart from the facial deformation and consequential effect including functional, esthetic and psychological setbacks, facial asymmetries are found to cause temporomandibular disorder.
With advances like virtual surgical planning and patient-specific implants, the execution of orthognathic planning has improved significantly.
However, achieving asymmetry can be difficult, and at times impossible
This lecture aims to enhance the understanding of the challenges of managing facial asymmetries, and to suggest realistic approaches in managing the severe cases.
10:30
Coffee break
11:00
Judith Zecha
The Eminent BSSO lecture 2025: Orthognathic surgery in gender affirming facial surgery
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Judith ZechaOral and Maxillofacial Surgeon, Amsterdam, The Netherlands
- Gender affirming facial surgery is embedded in the transgender care
- Transgender patients seeking gender affirming facial surgery, have different needs and it’s essential to explore those needs before surgery
- A variety of surgical approaches exist to establish feminization or masculinization of the face
- Orthognathic surgery can be a part of gender affirming facial surgery
11:30
Ravindra Nanda
Biomechanics Based Total Maxillary and Mandibular Arch Distalization with Extra Alveolar TADs in Borderline Patients
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Ravindra NandaBiomechanics Based Total Maxillary and Mandibular Arch Distalization with Extra Alveolar TADs in Borderline Patients
* Under what diagnostic conditions total maxillary arch retraction is advisable
* Relationship of line of force and approximate center of rotation of upper and lower arches
* Pros and cons of total arch distalization
* case histories
12:00
Adaia Valls
Management of the occlusal plane
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Adaia VallsOral and Maxillofacial Surgeon, Barcelona, Spain
- Changes in the occlusal plane impact the aesthetics and airway volume.
- The inclination of the incisors must guarantee good labial support,
regardless of the position of the jaws. - Changes in the occlusal plane involve cranio-cervical angulation changes, and consequently the Natural Head Position shifts.
12:30
Lunchbreak
13:30
Johan Reyneke
Minimally invasive surgery, a revisit
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Professor Johan ReynekeOral and Maxillofacial Surgeon, Laren, The Netherlands
• The concept of minimally invasive orthognathic surgery does not only involve small soft tissue incisions as a surgical approach.
• The application of a routine “step by step” operating technique as well as being aware of “tips and traps” for each step, increases confidence, efficiency, and quality of the surgical result while it decreases operating time and post operative morbidity.
• The surgeon should have: a clear understanding of the sequence of the surgical steps be aware of complications that may occur with each step the same routine for each procedure a clear vision of the treatment objectives
• The surgical team should: know the surgical routine anticipate each surgical step
14:00
Simon Graf
Looking back on 10 years of 3D metal printed appliances
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Dr.med.dent Simon GrafOrthodontist in practice Smile AG Belp, Switzerland
The first 3d metal printed orthodontic appliance was printed and used in a patient’s mouth in April 2014 in the clinic Smile Inc. of Simon Graf.
In his lecture he will look back on the failures, pitfalls and final success of the approach to virtually plan and direct print orthodontic appliances.
Simon Graf will specific point out the clinical side of bonding and debonding of 3d metal printed appliances, as many clinicians struggle in this point.
He will outline the mandatory steps for a successful combination with skeletal anchorage device like TADs and share his experience during the last 10 years with the audience.
14:30
Benedict Wilmes
TADs in young patients, do´s and don´ts
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Benedict WilmesOrthodontist, Dusseldorf, Germany
TADs may be useful in many situations in the orthodontic treatment. Currently, the alveolar process is still the most preferred insertion site. However, especially in children, the failure rate of buccally inserted TADs seems too high. Other regions, such as the anterior palate and the mental region provide much better conditions for a TAD insertion, since the amount and quality of the available bone is far superior even in children.
15:00
Tea break
15:30
Simon Littlewood
Reducing relapse after treatment of anterior open bite – how to approach this challenge
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Simon LittlewoodOrthodontist, Bradford, UK
• Experience of UK’s first NHS hospital using this technology for orthognathic patients
• The contemporary high quality evidence of the effectiveness of this technology
• What they found useful
• What they found challenging
• The future - has it got a role, and what further developments are required to make it work?
16:00
Lydia Lim
Orthognathic Surgery and the TMJ – when is combined TMJ replacement surgery required?
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Dr Lydia LimOral and Maxillofacial Surgeon, Sydney, Australia
• TMJ pathology can complicate orthognathic surgery outcomes. The diagnosis, treatment planning and surgical management of these conditions can be challenging and controversial.
• This presentation will discuss some of the implications of TMJ pathology in the orthognathic patient and outline when and when not to do TMJ replacement surgery.
• An approach to planning combined TMJ replacement and orthognathic surgery will be presented.
16:30
Lorenzo Trevisiol
Are large mandibular advancements predictable, long-term stability and relaps
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Prof. Lorenzo Trevisiol, MD, Maxillo-Facial SurgeonOral and Maxillofacial Surgeon, Trento, Italy
- Large mandibular advancement and counterclockwise rotation of the occlusal plane are movements still debated for potential relapse after surgery
- Mandibolar advancement and counterclockwise rotation of the occlusal plane are often required in modern orthognathic surgery to achieve a successful reharmonization of facial profile
- A proper planning and a proper surgical technique allows surgeons to obtain adequate stable results
- The ortho-surgical protocol has been validated through retrospective evaluation of 60 cases of large mandibular advancement with counterclockwise rotation of the occlusal plane
- The study allowed to identify sources of relapse and favoring factors, giving to the surgeon more tools to prevent relapse
17:00
Drinks
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