Integrating modern approaches like same-day dentistry can help improve treatment of elderly patients. (Image: hedgehog94/Shutterstock; clinical images: Mauro Fazioni)
Modern restorative and prosthetic dentistry have undergone significant advances over the last five years. Innovations in dental materials have truly transformed clinical applications by improving the performance of restorations in the oral cavity. Clinicians can now achieve ultrathin restorations using the current generation of hybrid composites, highly aesthetic zirconia and reinforced glass-ceramics, to name a few, and restorations from these materials are achievable through simpler procedures in the dental laboratory.
Fig. 1: Initial facial photograph.
This achievement is possible thanks to digitalisation procedures that guarantee greatly improved design techniques and the fabrication of medical devices in the laboratory utilising modern milling technologies. When applied in the laboratory, these tools provide manufacturing options that substantially expand the range of potential treatments. In-house methods can employ almost any manufacturing procedure, working with dry to wet ceramic composite materials, hybrids, metals, etc., in contrast to external milling centres, which frequently standardise production protocols, limiting applications.
The dentistry department of the IRCCS Ospedale Sacro Cuore Don Calabria, a hospital in Negrar in Italy, has been investigating clinical care models for dental pathologies that clinicians will face in the coming years. Understanding and comprehending these emerging diseases means developing tools that are capable of addressing the needs of future patients, and the treating team needs to be able to handle these new methods of addressing patient needs and diseases. The following are some important emerging fields of interest:
applying artificial intelligence for diagnosis, previewing, 3D modelling and treatment simulation;
restorative approach to same-day dentistry in terms of materials and methods;
treatment of severe oral pathology in pre-geriatric patients involving same-day dentistry;
dental malocclusions and orthodontic treatment with aligners;
treatment of severely worn dentition with in-house procedures; and
risks of and clinical strategies for clear aligner therapy.
Description
Adult patients with severe or extremely severe oral disease compromising the functions of the stomatognathic system are becoming increasingly prevalent. Unlike in the past, these patients are fully integrated into society. The lifestyle and dietary habits of these patients, even when they are older than 75 or 80, are comparable to those of younger adults, particularly in terms of their expectations. Clinically, these patients present with severe signs and symptoms that are frequently seen in other systemic diseases, including:
compromised masticatory ability;
spontaneous oral pain;
recurrent infections of the mouth and oral tissue;
Changes in physical appearance are an important component of modern ageing, especially for people over 65. Age-related changes in the anatomical and functional integrity of the oral cavity have an effect on more than just dental health; they also affect the pathogenesis of systemic disease and nutrition. A deficiency in dental occlusion has the same impact as inflammation from periodontal disease in changing the alveolar bone structure.
One of the greatest challenges to overcome is the need to minimise the number of appointments while continuing to provide effective treatment. Recently, materials with high aesthetic and functional predictability have been introduced to the market, enabling rehabilitation of the completely edentulous arch in a very short amount of time. The intra-oral impression can be instantly accessed in the patient’s habitual intercuspation. Condylar determinants can be evaluated realistically with a digital facebow, combined with CBCT, and masticatory movements can be reproduced. Full-arch reconstruction with complete dentures is possible using 3D modelling software in just a few minutes, providing an accurate assessment of recovery of the vertical dimension of occlusion. It has become possible to reconstruct the integrated functional and aesthetic profile initially shared with the patient using simulations.
Fig. 2: Intra-oral photograph of the initial situation.
Fig. 3: Areas of chronic inflammation of transmucosal tissue evident after removal of the maxillary prosthesis.
Fig. 4: Intra-oral scans of the maxillary and mandibular arches.
Fig. 5: Virtual removal of the maxillary prosthesis in exocad software.
Materials and methods
For teeth and prosthetic bases, cross-linked PMMA from the Ivotion denture system (Ivoclar) is recommended. Thanks to its unique Shell Geometry, it allows for excellent outcomes with a single milling, thus optimising time significantly. Optimisation of time and results are made possible by the use of the latest-generation, innovative milling machines that are extremely accurate and compatible with all commonly used milling techniques. A modern system that provides the technician and clinician with incredibly precise milling details, compatible with a same-day dentistry regimen, is the R5 five-axis milling machine (vhf camfacture).
Clinical case
A 75-year-old female patient in good mental and physical health presented with an implant-supported denture in the maxillary arch with widespread peri-implantitis and burning mouth syndrome (Figs. 1–3). In the lower jaw, she presented with a removable complete denture, abraded teeth and incongruence between the base and alveolar process. The patient reported pain and bleeding in the maxillary arch with compromised stability of the mandibular denture.
The 3D files of the prostheses were exported to the Ivotion denture system’s specific CAM module (Ivoclar; Figs. 4–6). The prostheses were milled using the Ivoclar-exclusive Shell Geometry processing capability of the R5 (Figs. 7–9). In 4 hours, the complete maxillary and mandibular prostheses had been fabricated (Fig. 10). For the maxillary prosthesis, we immediately relined it after removing the framework that had been screwed to the prosthesis and then screwed it in (Fig. 11). Re-evaluation with a digital facebow and data comparison were made possible by remote control (Figs. 12 & 13).
Fig. 6: Maxillary and mandibular prostheses designed with Ivotion libraries.
Fig. 7: The R5 is compatible with the unique Shell Geometry of the Ivotion disc.
Fig. 8: Denture in the vhf CAM software module for the R5.
Fig. 9: Adapter plate with the Ivotion disc inserted.
Fig. 10: Extremely high level of morphological and surface detail produced with the simultaneous monolithic milling of the pink aesthetics and the teeth.
Conclusion
Full-mouth restoration in a single session was made possible by the method of intra-oral scanning of the arches, immediate prosthetic design and milling of the Ivotion discs using the R5. Based on our clinical findings, this technique optimises time as well as expenses for the complete rehabilitation procedure in the same-day dentistry protocol. Production of complete prostheses with this digital workflow is 100% accurate and predictive regarding timing. The latest technology allows for highly precise evaluations of the accuracy of occlusal determinants, release planes and simulation of masticatory movement. The patient receives rehabilitation of both arches and accurate reconstruction in a single day.
Fig. 11: Denture in situ.
Fig. 12: Extra-oral situation at the four-week check-up.
Fig. 13: Detail of the morphology and texture of the anterior teeth at four weeks.
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