Objective: This study aimed to develop and clinically apply a remote dental mentoring system using a dental microscope, enabling both real-time and asynchronous guidance across multiple clinical fields.

Materials and Methods: A tele-mentoring system was constructed by integrating a 3D digital dental microscope (Kestrel View II, Mitaka Co., Tokyo, Japan) with a tele-mentoring system (TELEPRO, Tenmashimon Co., Ltd, Tokyo, Japan). This system allows remote specialists to observe high-resolution microscope images in real time or on-demand and provide diagnostic input or procedural guidance.

Results: he tele-mentoring system was applied to four clinical cases involving various dental specialties, including endodontics, periodontics, sleep dentistry, and oral pathology. In each case, remote mentoring enabled accurate diagnosis and treatment. The platform also proved effective for educational purposes, offering a novel approach to training in microdentistry.

Conclusion: The tele-mentoring system demonstrates significant potential in improving accessibility to specialist expertise, reducing regional disparities in care, and enhancing clinical education. It offers a practical and scalable model for remote diagnosis and mentoring using a dental microscope.

In cases of Oehlers class III-b dens invaginatus, the pulp may sometimes show a vital reaction even though there is a periapical lesion derived from the pseudo-root canal. This means that the pulp may often be preserved through root canal therapy of the pseudo-root canal. A case of Oehlers class III-b dens invaginatus of a maxillary left lateral incisor that was treated using a surgical microscope and bioceramic-based sealer is reported. The #12 tooth was diagnosed with class III-b dens invaginatus on the basis of the pre-procedural X-ray, and, since a vital reaction was noted despite the presence of an apical lesion, it was decided to treat the pseudo-root canal. The pseudo-root canal was enlarged and washed under a microscope and then filled by the single cone method,with a bioceramic-based sealer. At one-year follow-up, the symptoms and the lesion had disappeared. In this case, the use of a surgical microscope and a bioceramic-based sealer in the treatment of a pseudo-root canal allowed accurate, minimally invasive treatment.

A patient was referred for management of endodontic failure left mandibular first molar. Laser-assisted apicoectomy and photobiomodulation was done.

Instead of six monthly follow ups, patient was reviewed on three months for assessment of bone healing. Bone healing and radiographic changes indeed was observed in three months rather than six months.

Although microscopes have been applied clinically to implant treatment, they have also been reported to be useful for sinus approaches. However, the distance from the alveolar bone of the maxillary sinus on which the selection of the two sinus approach techniques (crestal and lateral approaches) was selected has varied. A decision tree for the approach to the maxillary molar lesion was developed by dividing the two types of implants into two groups: screw-type implants with a minimum longitudinal length of 7 mm, and screwless implants with a minimum longitudinal length of 5 mm.