Temporomandibular disorder is a disease caused by various factors such as trauma, mental stress, occlusal factors, and parafunc-tional habits. Among them, many scholars have been interested in the relationship between occlusion and temporomandibular disorder for a long time and have conducted numerous studies, but controversy over this relationship continues to this day. Based on previous studies, this review clearly establishes the relationship on occlusion and temporomandibular disorders and presents the direction for follow-up research by summarizing the limitations of current studies.

Temporomandibular disorder is a disease caused by various factors such as trauma, mental stress, occlusal factors, and parafunc-tional habits. Among them, many scholars have been interested in the relationship between occlusion and temporomandibular disorder for a long time and have conducted numerous studies, but controversy over this relationship continues to this day. Based on previous studies, this review clearly establishes the relationship on occlusion and temporomandibular disorders and presents the direction for follow-up research by summarizing the limitations of current studies.

Temporomandibular disorder is a disease caused by various factors such as trauma, mental stress, occlusal factors, and parafunc-tional habits. Among them, many scholars have been interested in the relationship between occlusion and temporomandibular disorder for a long time and have conducted numerous studies, but controversy over this relationship continues to this day. Based on previous studies, this review clearly establishes the relationship on occlusion and temporomandibular disorders and presents the direction for follow-up research by summarizing the limitations of current studies.

Although pancreatic leiomyosarcoma (PLM) is a rare malignant pancreatic cancer, it usually shows aggressive biological features such as invasion to an adjacent organ or distant metastasis at the time of diagnosis. Radical resection is the best treatment modality but effective chemotherapies have not been identified. A 58-year-old female was referred to us complaining of intermittent left upper quadrant abdominal discomfort. Imaging studies revealed a 10-cm mass in the pancreatic tail. The patient underwent laparoscopic distal pancreatectomy with splenectomy, and the pathological findings were consistent with PLM. Imaging studies 14 months after surgery revealed multiple liver metastases. Because the patient was young with a sufficient remnant liver, we performed laparoscopic metastatectomy without any postoperative complications. Patients with PLM need frequent check-ups, even after curative resection. The role of laparoscopic resection should be confirmed in the future.
Diagnosis ; Drug Therapy ; Female ; Humans ; Laparoscopy ; Leiomyosarcoma* ; Liver* ; Middle Aged ; Neoplasm Metastasis* ; Pancreatectomy ; Pancreatic Neoplasms ; Postoperative Complications ; Splenectomy ; Tail

Increasing the vertical dimesion affects not only functional problems but also the facial appearance. In particular, when restoring the reduced vertical dimension, it is important to evaluate facial appearance because the change affects the patient’s aesthetics. Cephalometric radiographs can predict changes in the facial appearance through skeletal and vertical classifications using anatomical indicators, and the changes before and after treatment can be easily observed, which could serve as good data in evaluating treatment success. In this study, comparative evaluation was performed through cephalometric radiography, and the aesthetic and functional improvement was confirmed.

Successful cases of the implant-assisted removable partial denture and implant overdentures are reported in which a few implants are additionally placed to secure the maintenance, support, and stability of the denture when there are a few residual teeth. When the lateral force applied to the tooth abutment and implant surveyed crown is minimized, the horizontal and rotational movement of the denture is significantly reduced which is an effective method that can improve the address in patients who complain of reduced retention and stability of their dentures. In this case, a small number of implants were placed to fabricate an implant-assisted removable partial denture with implant surveyed crown in the maxilla and implant overdenture with Locator® attachment in the mandible to improve the retention, stability, and support of the dentures. The patient was satisfied with both functional and aesthetic aspects after the final dentures were delivered.

Esthetic restoration of maxillary anterior implant heavily depends on the direction of installation of implant fixture. In patients with malpositioned implant, it is crucial to communicate the limitations of prosthetic outcome with the patient before starting on a restoration. To facilitate the communication, three-dimensional virtual representation by superimposing facial and intraoral digital scans with Computed Tomography (CT, dicom file) was used for visualization of the limitations of prosthesis. Through digital diagnostic wax-up, the profile of right maxillary anterior incisor implant was expected to be protrusive, which the patient was not satisfied with. Since the patient already had done root canal treatment on left maxillary anterior incisor due to previous trauma, a new prosthetic design including both right and left maxillary anterior incisors was presented to the patient. The second design was chosen and his comments were delivered to dental lab. The patient was satisfied with the new prosthesis, aesthetically and functionally.

Purpose: This study aimed to evaluate the color stability and antibacterial properties of the surface of polyethyl methacrylate (PEMA) resin with zirconia nanoparticles added. Materials and Methods: The control group was pure PEMA resin, and the experiment group was PEMA resin 15 mm in diameter and 2.5 mm in thickness disk-shaped specimens with 2, 4 and 8 w/v% of zirconia nanoparticles added, which were respectively divided into Group Z2, Group Z4, and Group Z8. After analyzing the surface roughness and color stability of the specimens, their antibacterial properties were evaluated using Porphyromonas gingivalis (P. gingivalis). The Statistical analysis was performed using when normality was met in the Shapiro-Wilk test, one-way ANOVA was used to test parameters, and Tukey’s test was used as a post hoc test. When normality was not met, the Kruskal-Wallis test, a non-parametric test was used (P < 0.05). Results: The surface roughness measurement found that there was no significant difference between the experimental and control groups. The color stability evaluation showed that the Z2, Z4, and Z8 groups were within the color range of natural teeth.The adhesion of P. gingivalis was evaluated to be significantly reduced in Group Z2 compared to the control group (P < 0.05). In the Z2 group, Z4 group, and Z8 group, dead cells bacteria than the control group were observed. Conclusion In conclusion, PEMA resin with zirconia nanoparticles added was within the range of natural teeth in color and reduced the adhesion of P. gingivalis

Dental trauma is common in active children and adolescents. Among them, in the case of ankylosis due to avulsion, diagnosis through clinical examination is important, and the treatment is important for esthetic prosthetic restoration after adulthood. This case is a case of esthetic prosthetic restoration of maxillary anterior teeth through decoronation and implant. After that, space was maintained for prosthetic restoration using a decoronated crown. After becoming an adult, precise implant placement and esthetic prosthetic restoration were possible using guide surgery. For soft tissue support, the temporary crown were replaced by changing the contours of the temporary crown, and the final esthetic prosthesis was fabricated by digital wax-up.

In patients with myasthenia gravis, it is difficult to manufacture and maintain dentures because the muscles and nervous system in the oral cavity are not properly adjusted. In addition, excessively extended or thick dentures may cause muscle weakness by stimulating the muscles, so dentures should be manufactured in consideration of this. In this case, a denture was fabricated using the closed mouth technique in a patient with myasthenia gravis with mouth opening limitation. Using the closed mouth technique, the patient’s masticatory pressure and muscle movements were reproduced and denture with good retention were manufactured.