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Natural 4-year periodontal progression of mandibular first molars in Chinese villagers based on radiographic records

Journal of Periodontology Aug 16, 2019

Pei X, et al. - In 15 to 44-year-old Chinese villagers, researchers reported 4-year natural periodontal progression of mandibular first molars based on radiographic records. They recorded panoramic radiographs in 1992 (n = 486) and 1996 (n = 413). Relative bone height (RBH), intrabony defect (IBD) depth, and furcation involvement (FI) were measured in 1992 and 1996 on 918 and 755 mandibular first molars, respectively. They analyzed the progression of the three parameters and their association with widened periodontal ligament space (WPDL). Of the 31 first mandibular molars lost in 1992, 29 belonged to the group of 35- to 44-year-olds. Five of eight lost teeth belonged to the 35- to 44-year age group at 4-year follow-up. Overall, the authors concluded that tooth loss occurred mainly in the age group of 35- to 44 years. In the 25- to 44-year age group, RBH development was quicker. WPDL was linked to RBH, IBDs, and FI progression.
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