Rehabilitating total anodontia: the challenge of ectodermal dysplasia

Ectodermal dysplasia (ED) presents the implantology specialist with extreme clinical situations, particularly when it manifests as congenital total anodontia of both primary and permanent dentitions. In this 27-year-old patient, this pathology resulted in severe underdevelopment of the alveolar ridges, making conventional rehabilitation impossible. The clinical picture was further complicated here by a particularly fragile zygomatic bone, significantly increasing the risk of orbital complications during zygomatic implant placement using a classic manual technique.

The precise objective of this case report is to detail the management of this major atrophy via a 100% digital workflow, encompassing diagnosis, surgical planning, and prosthetic fabrication. The study specifically documents the use of dynamic navigation for the positioning of four zygomatic implants, followed by immediate loading with a fixed provisional prosthesis delivered within 48 hours.

L'approche repose sur l'hypothèse qu'un protocole numérique intégré permet de sécuriser l'insertion implantaire dans des volumes osseux critiques, offrant une solution prévisible et pérenne. Les auteurs évaluent l'efficacité de cette stratégie sur un suivi de cinq ans, en se concentrant sur la stabilité osseuse, l'absence de complications sinusiennes et l'impact psychosocial de la restauration finale sur la patiente.

Clinical approach and digital protocol

This case report documents the rehabilitation of a 27-year-old female patient with ectodermal dysplasia and complete anodontia. The major challenge lay in the severe atrophy of the alveolar ridges and the fragility of the zygomatic bone. To secure the procedure, the authors opted for a 100% digital workflow.

• Surgical procedure: Placement of four zygomatic implants in the maxilla using dynamic navigation. This technology was specifically chosen to prevent orbital complications associated with freehand placement.
• Loading protocol: A temporary fixed prosthesis was delivered in immediate loading, only 48 hours after oral surgery.
• Final restoration: After a six-month healing phase, the definitive prosthesis was designed with a biocompatible high-performance polymer (BioHPP) framework and a zirconia-ceramic finish.

The post-operative follow-up extended over a five-year period. The analysis of therapeutic success focused on implant stability, the absence of sinusitis, the absence of bone loss, and the monitoring of local inflammation. This clinical follow-up allows for the evaluation of the prosthetic solution's durability and the biological integration of the materials used.

5-year clinical results and follow-up

The management of this 27-year-old female patient, suffering from complete anodontia related to ectodermal dysplasia, demonstrated the viability of a 100% digital workflow for cases of severe atrophy. The use of dynamic navigation ensured the secure placement of the four zygomatic implants despite an initial bone structure considered fragile and a high risk of orbital complications.

In terms of implant stability and peri-implant health, the qualitative and radiographic observations at 5 years confirm the following points:

• Implant success: A 100% survival rate was observed for all zygomatic and standard implants used.
• Absence of complications: No signs of soft tissue inflammation, sinusitis, or peri-implant bone loss were detected during follow-up examinations.
• Structural integrity: The high-performance polymer infrastructure (BioHPP) maintained its mechanical stability without fracture or prosthetic failure.

Control imaging validates the precision of the positioning guided by dynamic navigation, avoiding any orbital intrusion. Beyond clinical parameters, the rehabilitation allowed for a significant improvement in oral functions and facial aesthetics, facilitating the patient's social integration and communication.

Clinical analysis and 5-year follow-up

The success of this rehabilitation in a 27-year-old patient with total anodontia demonstrates the viability of the 100% digital workflow for cases of extreme maxillary atrophy. The use of dynamic navigation ensured the safe placement of the four zygomatic implants, bypassing the orbital risks associated with fragile zygomatic bone inherent to ectodermal dysplasia. The stability of the peri-implant tissues and the absence of sinus complications after 60 months validate the precision of the implant positioning and the biocompatibility of the final restoration in BioHPP and zirconia.

Limits and perspective

The study is limited by its single case report format (n=1), which precludes any statistical generalization. Although the results are conclusive, the specific bone fragility of ED patients requires a rigorous learning curve for dynamic navigation. Compared to traditional freehand techniques, this approach reduces surgical empiricism, but its cost and the required equipment remain potential barriers for systematic application in private practice.

Implications for practice

These results show that immediate loading (48 h post-surgery) is feasible and sustainable even in complex systemic contexts. The choice of BioHPP for the framework offers a high-performance alternative to traditional metals, combining lightness and strength. For the implantologist, the integration of digital technology, from diagnosis to the final prosthesis, transforms a high-risk intervention into a predictable procedure drastically improving the patient's quality of life.

Study summary

This case report demonstrates the 5-year success of a 100% digital protocol for treating total anodontia in a 27-year-old female patient with ectodermal dysplasia. The use of dynamic navigation allowed for the secure placement of four zygomatic implants despite fragile bone, with immediate loading within 48 hours and a final BioHPP/Zirconia restoration ensuring perfect bone and sinus stability.

In concrete terms, for the practitioner:

• Secure complex anatomies: Dynamic navigation is a predictive solution for zygomatic implant placement when bone volume is critical or close to the orbits.
• Opt for the global digital workflow: From planning to the final BioHPP prosthesis, the digital approach reduces the risk of manual errors and optimizes prosthetic fit on extensive infrastructures.
• Rehabilitate quickly: Immediate loading (D+2) is clinically viable even in cases of severe atrophy, instantly improving social integration and function for young patients.

Information intended for healthcare professionals. This content may contain errors or truncated summaries. We recommend always verifying with the original source article. Delynov disclaims all responsibility for the use of this information. This document is not intended for patients or the general public.