Tooth transposition is a rare dental anomaly in which two adjacent teeth develop and erupt in altered positions. It is often associated with other dental abnormalities, such as congenitally missing or peg-shaped lateral incisors. This case report presents 3 pediatric patients diagnosed with complete unilateral transposition of the maxillary canines and peg-shaped lateral incisors. In all cases, the transposed teeth were aligned in altered positions to minimize potential complications, such as root resorption. Orthodontic traction and alignment were performed, resulting in satisfactory tooth alignment without significant complications.

The aim of this study was to quantitatively evaluate the amount of tooth reduction required for prefabricated zirconia crowns (PZCs) of maxillary and mandibular primary first molars by evaluating different areas of the tooth. A total of 271 intact primary first molars were scanned using a 3D scanner, and PZCs were virtually superimposed to analyze the amount of tooth reduction. The results indicated that in the maxillary primary first molars, more reduction was required on the buccal occlusal surface compared to the lingual occlusal surface, whereas in the mandibular primary first molars, a similar amount of reduction was required on both buccal and lingual occlusal surfaces. For the axial surfaces, the maxillary primary first molars required the most reduction on the lingual surface than buccal and proximal surfaces, whereas the mandibular primary molars required significantly less reduction on the lingual surface. Additionally, a trend was observed where larger crowns required less reduction on the buccal and lingual surfaces. This study provides detailed guidelines on the required amount of reduction for PZC restorations, contributing to more efficient preparation in clinical practice.

This retrospective study evaluated the 24-month survival rates of second primary molars after treatment of ectopic eruption of the maxillary permanent first molar with the Halterman appliance. Patients diagnosed with ectopic eruption at the Department of Pediatric Dentistry at Chosun University Dental Hospital and three private pediatric dental clinics between January 2017 and December 2021 were included. This study involved 113 children (66 boys and 47 girls) aged 5 to 9 years, utilizing electronic medical records and panoramic radiographs for evaluation. Survival analysis of second primary molars was conducted using the Kaplan-Meier method and Cox proportional hazards regression models. The findings indicated that the degree of root resorption significantly influenced survival rates, with 24-month cumulative survival rates of 90.9% for grade 1, 88.6% for grade 2, 68.9% for grade 3, and 33.3% for grade 4. The risk of premature loss was approximately 8.7 times higher in grade 4 compared to grade 1. No significant correlation was found between the survival rates and factors such as patient age, mesial angulation of the permanent first molar, or gingival emergence status of the permanent first molar. This study emphasizes the critical need to evaluate root resorption in second primary molars and to carefully consider anchorage design in the treatment of ectopically erupted permanent first molars, highlighting directions for further research.

This retrospective study aims to analyze the incidence and characteristics of sportsrelated dental injuries in pediatric patients, providing foundational data for the prevention and management of such injuries. Medical records of 2,382 patients aged 3 – 18 who visited Chosun University Dental Hospital between January 2018 and January 2024 were reviewed. Of these, 308 patients who experienced sportsrelated dental trauma were analyzed. Data collected included patient demographics, type of sport, cause of injury, time and location of the trauma, and type of injury. Sports-related dental injuries accounted for 12.9% of all trauma cases in the study population. Males (74.4%) were more commonly affected than females. The most common cause of injury was cycling (21.0%), followed by contact group sports (16.2%) and kickboard (15.5%). Tooth injuries, particularly affecting the maxillary anterior teeth, were the most prevalent type of trauma (63.6%). The presence of a supervisor significantly reduced the time to initial management, indicating the importance of prompt response to dental injuries. Sports-related dental trauma represents a significant public health concern among pediatric and adolescent populations. Increased supervision during sports activities and preventive measures, including the use of protective gear like mouthguards, are essential to reducing the incidence and severity of injuries.

Tooth transposition is a rare dental anomaly in which two adjacent teeth develop and erupt in altered positions. It is often associated with other dental abnormalities, such as congenitally missing or peg-shaped lateral incisors. This case report presents 3 pediatric patients diagnosed with complete unilateral transposition of the maxillary canines and peg-shaped lateral incisors. In all cases, the transposed teeth were aligned in altered positions to minimize potential complications, such as root resorption. Orthodontic traction and alignment were performed, resulting in satisfactory tooth alignment without significant complications.

The aim of this study was to quantitatively evaluate the amount of tooth reduction required for prefabricated zirconia crowns (PZCs) of maxillary and mandibular primary first molars by evaluating different areas of the tooth. A total of 271 intact primary first molars were scanned using a 3D scanner, and PZCs were virtually superimposed to analyze the amount of tooth reduction. The results indicated that in the maxillary primary first molars, more reduction was required on the buccal occlusal surface compared to the lingual occlusal surface, whereas in the mandibular primary first molars, a similar amount of reduction was required on both buccal and lingual occlusal surfaces. For the axial surfaces, the maxillary primary first molars required the most reduction on the lingual surface than buccal and proximal surfaces, whereas the mandibular primary molars required significantly less reduction on the lingual surface. Additionally, a trend was observed where larger crowns required less reduction on the buccal and lingual surfaces. This study provides detailed guidelines on the required amount of reduction for PZC restorations, contributing to more efficient preparation in clinical practice.

This retrospective study evaluated the 24-month survival rates of second primary molars after treatment of ectopic eruption of the maxillary permanent first molar with the Halterman appliance. Patients diagnosed with ectopic eruption at the Department of Pediatric Dentistry at Chosun University Dental Hospital and three private pediatric dental clinics between January 2017 and December 2021 were included. This study involved 113 children (66 boys and 47 girls) aged 5 to 9 years, utilizing electronic medical records and panoramic radiographs for evaluation. Survival analysis of second primary molars was conducted using the Kaplan-Meier method and Cox proportional hazards regression models. The findings indicated that the degree of root resorption significantly influenced survival rates, with 24-month cumulative survival rates of 90.9% for grade 1, 88.6% for grade 2, 68.9% for grade 3, and 33.3% for grade 4. The risk of premature loss was approximately 8.7 times higher in grade 4 compared to grade 1. No significant correlation was found between the survival rates and factors such as patient age, mesial angulation of the permanent first molar, or gingival emergence status of the permanent first molar. This study emphasizes the critical need to evaluate root resorption in second primary molars and to carefully consider anchorage design in the treatment of ectopically erupted permanent first molars, highlighting directions for further research.

This retrospective study aims to analyze the incidence and characteristics of sportsrelated dental injuries in pediatric patients, providing foundational data for the prevention and management of such injuries. Medical records of 2,382 patients aged 3 – 18 who visited Chosun University Dental Hospital between January 2018 and January 2024 were reviewed. Of these, 308 patients who experienced sportsrelated dental trauma were analyzed. Data collected included patient demographics, type of sport, cause of injury, time and location of the trauma, and type of injury. Sports-related dental injuries accounted for 12.9% of all trauma cases in the study population. Males (74.4%) were more commonly affected than females. The most common cause of injury was cycling (21.0%), followed by contact group sports (16.2%) and kickboard (15.5%). Tooth injuries, particularly affecting the maxillary anterior teeth, were the most prevalent type of trauma (63.6%). The presence of a supervisor significantly reduced the time to initial management, indicating the importance of prompt response to dental injuries. Sports-related dental trauma represents a significant public health concern among pediatric and adolescent populations. Increased supervision during sports activities and preventive measures, including the use of protective gear like mouthguards, are essential to reducing the incidence and severity of injuries.

Tooth transposition is a rare dental anomaly in which two adjacent teeth develop and erupt in altered positions. It is often associated with other dental abnormalities, such as congenitally missing or peg-shaped lateral incisors. This case report presents 3 pediatric patients diagnosed with complete unilateral transposition of the maxillary canines and peg-shaped lateral incisors. In all cases, the transposed teeth were aligned in altered positions to minimize potential complications, such as root resorption. Orthodontic traction and alignment were performed, resulting in satisfactory tooth alignment without significant complications.

The aim of this study was to quantitatively evaluate the amount of tooth reduction required for prefabricated zirconia crowns (PZCs) of maxillary and mandibular primary first molars by evaluating different areas of the tooth. A total of 271 intact primary first molars were scanned using a 3D scanner, and PZCs were virtually superimposed to analyze the amount of tooth reduction. The results indicated that in the maxillary primary first molars, more reduction was required on the buccal occlusal surface compared to the lingual occlusal surface, whereas in the mandibular primary first molars, a similar amount of reduction was required on both buccal and lingual occlusal surfaces. For the axial surfaces, the maxillary primary first molars required the most reduction on the lingual surface than buccal and proximal surfaces, whereas the mandibular primary molars required significantly less reduction on the lingual surface. Additionally, a trend was observed where larger crowns required less reduction on the buccal and lingual surfaces. This study provides detailed guidelines on the required amount of reduction for PZC restorations, contributing to more efficient preparation in clinical practice.