RESUMO
Introduction: Polyetheretherketone (PEEK) has a long history of usage in implant abutments, but it has not seen much applications in tooth-supported prosthetics. The purpose of this research was to examine the clinical performance of PEEK crowns as well as the level of patient satisfaction with them. The pilot study was designed as an in vivo longitudinal examination. Material and Methods: Twenty patients each received a PEEK crown during the procedure. In total, 22 implants were inserted, with 11 going into the maxilla and 9 into the mandible. One operator was responsible for carrying out each phase of the procedure. The resin cement was used to lute the crowns that were produced. Baseline, 3 months, 6 months, and 1 year after the crowns were placed, they were evaluated for various parameters using Modified Ryge's Criteria. These evaluations were performed at intervals of 3 months, 6 months, and 1 year. In addition, a questionnaire was used at the same time to assess the level of satisfaction felt by patients. Fisher's exact test was utilized in the process of analyzing the data that were gathered. Results: According to the findings, 92.5% of the crowns met the modified version of Ryge's criterion for a satisfactory rating. Three crowns had a fracture recorded. There was some chipping off observed in five of the crowns. There was not any significant difference in the other factors that were examined. The periodontal health of these three patients showed a slight degree of variance (P = 0.02). Conclusion: The capacity of PEEK crowns to create high-quality prostheses that were deemed satisfactory with a reasonably low rate of fracture during the relative mean duration of 1 year was established by the application of Modified Ryge's Criteria. The PEEK crowns demonstrated their ability to produce quality prostheses.
RESUMO
OBJECTIVES: The objectives of the study include the following: (i) to assess the presence of accessory canals and foramina in the body of the mandible using cone-beam computed tomography (CBCT), (ii) to evaluate the location, number, diameter, and length of accessory canals in the body of the mandible, and (iii) to propose a new classification for mandibular accessory canals based on the location. METHODS: A total of 50 (25 males and 25 females) CBCT scans were analyzed in three anatomical planes and three-dimensional (3D) reconstructions for the exact number, location, diameter, and accessory length canals and accessory foramina in the body of the mandible. The statistical analysis used was an independent t-test. RESULTS: Out of 50 CBCT scans, a total of 243 accessory canals and 245 accessory foramina were found. About 53% of accessory canals and foramina were found in males, while 47% were observed in females; 89% were evident in the anterior region, and only 11% were in the posterior region. The majority (64%) of the medial lingual canals had a diameter greater than or equal to 1 mm, while only 32% of accessory canals had a diameter of less than 1 mm (p < 0.05). The mean length of median lingual canals in females was 1.2910 ± 0.2582 mm and 2.6438 ± 0.5288 mm in male subjects. Mandibular accessory canals are classified broadly into anterior and posterior accessory canals, which have further subdivisions. CONCLUSION: CBCT plays a dynamic role in determining the mandible location of various neurovascular structures, including accessory canals and foramina. Female subjects were observed with more accessory canals and foramina and more common in the anterior region than in the posterior region.