Effects of Crown Lengthening on Bi, PLI and PD Levels in Patients with Different Periodontal Biotypes

Objective:To investigate the effect of crown lengthening on patients with different periodontal biological types.Methods:60 patients with different periodontal biotypes treated in our hospital from May 2017 to February 2019 were retrospectively analyzed.According to the different periodontal biotypes,the above-mentioned patients were further divided into control group(thin fan type,30 cases)and observation group(thick flat type,30 cases).The periodontal probing depth(PD),plaque index(PLI),bleeding index(BI)and gingival margin position at 1 week,1 month,2 months and 3 months after operation were compared between the two groups.Results:The PD,Bi and PLI values of the two groups after treatment were lower than those before treatment(P<0.05);There was no significant difference in gingival margin position between the two groups after 1 week to 1 month and 1 month to 2 months(P>0.05);After 2 months to 3 months of treatment,the gingival margin distance of the observation group was larger than that of the control group,and the difference was statistically significant(P<0.05).Conclusion:Crown lengthening can effectively improve the periodontal indexes of different periodontal biotypes,and the gingival margin of thick and flat type patients moves more toward the crown.

Periodontally accelerated osteogenic orthodontics with platelet-rich fibrin in an adult patient with periodontal disease:A case report and review of literature

BACKGROUND In the clinical scenario,adult patients with periodontal diseases and dental malformation,characterized by dental crowding in lower anterior teeth with the thin biotype,often require orthodontic treatment.This case report aimed to evaluate the clinical and radiographic outcomes of periodontally accelerated osteogenic orthodontics(PAOO)combined with autologous platelet-rich fibrin(PRF)in an adult patient with class I malocclusion along with dental crowding,a thin periodontal biotype,and buccal plate deficiency.CASE SUMMARY A 32-year-old female complaining of dental crowding and gingival bleeding was referred to the orthodontic clinic.The patient underwent periodontal risk assessment prior to orthodontic treatment.She was diagnosed with a high risk of gingival recession due to dental crowding,root prominence,loss of buccal plates,and a thin gingival tissue biotype.The treatment regimen included PAOO combined with autologous PRF for alveolar augmentation and interproximal enamel reduction for moderate dental crowding.Clinically,PAOO-assisted orthodontic tooth movement in this case showed enhanced periodontium remodeling.Radiographic outcomes also showed statistically significant improvements(P<0.01)in the mandibular buccal alveolar bone.CONCLUSION This case report suggests the combination of autologous PRF with PAOO to enhance bone augmentation and long-term tissue support in adult orthodontic patients with periodontal disease.