Comparative evaluation of volumetric changes following rotary and hand files' canal preparation of primary maxillary canine: an in vitro nano-CT analysis.

PURPOSE: To evaluate the volumetric changes of two recently introduced paediatric rotary file systems in comparison with conventional hand file systems in primary maxillary canines using an ultra-high-resolution nano-computed tomography. METHODS: This in vitro study was performed in extracted primary maxillary canines based on certain inclusion and exclusion criteria. Samples were prepared, and working length was determined after the pre-operative scan using a high-resolution nano-CT device (SkyScan 2214, Bruker, Kontich, Belgium). A single well-experienced paediatric dentist prepared the canals using three file systems: Kedo-S plus, Kedo-SG blue and hand K-files. All samples were subjected to post-operative scans performed similar to pre-operative scans. Image reconstruction was performed with NRecon software for 3D volumetric visualisation and analysis of the root canals. RESULTS: Kedo-SG blue file systems had the highest mean difference in the canal volume (4.05%). Hand K-files had the least difference at (3.71%) of canal volume. Kedo-S plus file system had a moderate mean canal volume difference (3.82%) which is closer to hand K-files. Intergroup comparison between the three groups showed that the mean difference in canal volume was statistically significant between all three file systems (p = 0.000). CONCLUSION: Within the limitations of the current study, rotary file systems produced a significant enlargement of canals as compared to hand files. Kedo-SG blue created a uniform preparation of the canal cervico-apically. Kedo-S plus files were prepared more coronally with minimal preparation apically as close to the preparation of hand files. TRIAL REGISTRATION: Trial registration number: IHEC/SDC/PEDO-2103/22/651, Date of registration: 2022.

Recommendations for dental management of diastrophic dysplasia: a rare case report.

BACKGROUND: When treated in a dental chair, patients with deformities such as scoliosis often require special consideration. CASE REPORT: Here is a case of 9 years old Saudi child who was reported with dental problems. The objective of this study is to provide a guideline for dental management of diastrophic dysplasia. CONCLUSIONS: Diastrophic dysplasia is a rare and nonlethal skeletal dysplasia, autosomal inheritance recessive, recognized by the infant's dysmorphic changes at birth. Diastrophic dysplasia is not a common hereditary disorder, however, the characteristic of this condition and guidelines for dental treatment should be known to a pediatric dentist, particularly at a major medical center.