| Part 1:Exploring the genetic correlation of palatal folds based on three-dimensional digital modelsResearch background and purpose:In recent years,due to the frequent occurrence of major accidents,there is an urgent need for a quick and simple method to identify the human body,and the palatal fold,which is surrounded by muscle tissue,teeth and bones,has become the same identification mark with more development potential.However,there are still disputes about the stability of the palatal fold.Therefore,the purpose of this study is to explore the heredity of the shape,length and uniform category of the palatal fold between parents and children based on three-dimensional scanning technology,in order to provide a new idea and method for dental forensic identification.Materials and methods:40 children and their parents were selected from the Department of Children’s Stomatology of the Affiliated Hospital of Hangzhou Normal University from October 2021 to February 2022.A total of 120 subjects were selected.The children’s ages were 8 to 16 years old(11.53±2.06),and the parents’ ages were 30 to 45 years old(37.48±4.13).The three-dimensional digital model of the upper jaw was collected using an oral scanner.Each model required the complete palatal fold.Parents and children were grouped according to sex and then assessed the palatal fold pattern using 3 Shape 3D Viewer software and Thomas and Kotze(1983)classification.Results:The shape of the palatal fold of 120 subjects was different,and the father and son group had statistical significance in the right main palatal fold,the right wavy fold,the left circular fold,and the left converging fold(p<0.05);There was significant difference in the left main palatal fold in the mother and daughter group(p<0.05);There were statistically significant differences in the left main palatal fold,the right main palatal fold,the left wavy fold,the right wavy fold,the left circular fold,the left converging fold and the right converging fold in the parent and daughter group(p<0.05).Conclusion:The palatal fold has personality characteristics,and there are certain similar components between parents and children.The shape of palatal fold is affected by genetic inheritance.Part 2:Revascularization therapy based on young permanent teethBackground and purpose:Apical periodontal disease of young permanent teeth is more common in pediatric stomatology,and how to control inflammation,close the apex and promote root growth has always been a difficult point in clinical treatment.This article aims to study the effects of revascularization treatment in children with endodontic disease and apical periodontal disease,and analyze their effects on root development,in order to provide more evaluation basis for clinical efficacy.Methods:During October 2020～October 2022,children with acute and chronic apical periodontitis caused by tooth trauma,tooth fracture,deformed central apical fracture or caries were selected for case collection,follow-up observation,and finally clinical treatment results of the affected teeth were analyzed.Results:A total of 5 children with 6 teeth were included in this study.The follow-up and regular analysis of their initial and return visits showed that all six teeth were alive at present.According to the measurement and analysis of the X-ray films of the teeth after surgery,the increase rate of RL was(8.40 ± 5.94)%,the decrease rate of AFW was(62.23 ± 3.11)%,the increase rate of RDT was(14.80 ± 15.32)%,the increase rate of RRA area was(23.20 ±15.69)%,and the decrease rate of RCA area was(13.42±7.91)%,All 6 teeth have achieved clinical healing,with a clinical success rate of 100%.Conclusion:The application of pulp revascularization technology in the treatment of young permanent teeth with periapical diseases has achieved good clinical results,which worth vigorously promoting in the future. |
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