Relevance. Long-term clinical experience with implant-supported prosthetic treatment has confirmed its effectiveness in the rehabilitation of patients with partial or complete tooth loss. One of the key factors contributing to late implant complications and reduced implant service life is microleakage at the implant–abutment interface. Sealing of the implant connection has therefore been proposed as a preventive measure aimed at eliminating the technical microgap at the interface.

Materials and methods. The sealing performance of two implant sealants was evaluated after cyclic compressive fatigue loading. The study compared a sealant commonly used in Russia, Sildent (sample 1), with its foreign analogue, Gapseal (sample 2). The mechanical stability of the implant–abutment assemblies under cyclic loading was tested using a servohydraulic testing machine. Each assembly was loaded once at a frequency of 25 Hz with forces ranging from 130 to 380 N for 240,000 cycles, simulating approximately one year of mastication. Sealing ability was assessed using a fluorescent dye penetration assay with a 10% sodium fluorescein (Uranin A) solution. Fluorescein concentration was measured spectrophotometrically.

Results. Marked differences in fluorescein release kinetics were observed between the tested samples. In sample 1, dye concentration was 6.5-fold higher after 1 h of exposure, 3.4-fold higher after 12 h, 6-fold higher after 24 h, 4-fold higher after 48 h, and approximately fivefold higher after 312 h compared with sample 2.

Conclusion. The results suggest different mechanisms controlling dye release in the evaluated sealants and support the need for further studies with an increased number of repetitions to confirm the findings statistically.

Relevance. Oral rehabilitation of edentulous patients with dental implants is a well-established treatment modality. However, in the absence of adequate bone volume and favorable anatomical conditions, implant placement is not feasible, necessitating reconstructive bone augmentation procedures. Such procedures, although effective, are associated with a risk of iatrogenic complications. Therefore, the use of patient-specific reconstructive techniques based on fundamental anatomical principles and supported by advances in three-dimensional (3D) virtual planning technologies in dental surgery is of particular clinical relevance.

Clinical case description. This report illustrates the use of preoperative virtual planning and the technical aspects of three-dimensional reconstruction of the mandibular alveolar ridge using a patient-specific, anatomically contoured titanium mesh. The patient presented with partial edentulism in the region of teeth 35, 36, and 37 due to trauma, extraction, or localized periodontitis. Treatment comprised three stages: preoperative virtual planning with fabrication of a custom-made titanium mesh, the reconstructive surgical procedure, and removal of the mesh eight months postoperatively. Both the early and late postoperative periods were uneventful, with no signs of inflammation or exposure of the titanium mesh. Follow-up cone-beam computed tomography (CBCT), together with clinical examination and probing, confirmed the formation of a stable, homogeneous augmented bone volume that improved the conditions for subsequent dental implant placement.

Conclusion. Patient-specific titanium meshes for mandibular oral reconstructive surgery should be designed with careful consideration of mandibular anatomy to minimize the risk of iatrogenic injury to neurovascular structures. The technique described in this case is characterized by technical simplicity, high clinical efficacy, anatomical precision, and applicability across a wide range of clinical situations.