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Abstract：
Background: The aim of this study was to retrospectively evaluate the 3-year radiographic outcomes of periodontal intrabony defects treated with non-surgical subgingival therapy (NST), assessing radiographic bone gain (RBG) through experimental digital software, named \"Bone Defect Analysis (BDA)\". Methods: The study included 17 intrabony defects in 14 patients. BDA software (version 1) was used on radiographs to calculate RBG (in %) and variations in defect angle (in °) between baseline (T0) and 3-year follow-up (T1). Soft tissue conditions were registered, reporting bleeding on probing (BOP), probing pocket depth (PPD), and clinical attachment level (CAL). Defects were analyzed according to angles less (group A) or greater (group B) than 30°. Results: Nine and eight defects were, respectively, analyzed in groups A and B. Three years after treatment, an average RBG of 12.28% was found overall, with 13.25% and 10.11% for groups A and B, respectively (p = 0.28). Clinically, a mean CAL of 6.05 mm at T1 (from 10.94 mm at T0) was found, with 6.88 mm and 5.12 mm in groups A and B, respectively (p = 0.07). Conclusions: BDA software demonstrated predictability in the evaluation of bone variations after NST, revealing better clinical findings for intrabony defects with an initial smaller angle.
摘要：
背景：本研究的目的是回顾性评估非手术龈下治疗（NST）治疗的牙周骨内缺损的3年影像学结果，通过实验数字软件评估放射学骨增益（RBG），命名为“骨缺损分析(BDA)”。方法：该研究包括14例患者的17例骨内缺损。在射线照片上使用BDA软件（版本1）来计算基线（T0）和3年随访（T1）之间的RBG（以％为单位）和缺陷角（以°为单位）的变化。登记软组织状况，探查时报告出血（BOP），探测袋深度（PPD），和临床依恋水平（CAL）。根据小于(A组)或大于(B组)30°的角度分析缺陷。结果：有9个和8个缺陷，分别,分析A组和B组治疗后三年，总体上发现平均RBG为12.28%，A组和B组分别为13.25%和10.11%，分别(p=0.28)。临床上,发现T1时的平均CAL为6.05mm（从T0时的10.94mm），A组和B组分别为6.88毫米和5.12毫米，分别(p=0.07)。结论：BDA软件在NST后评估骨变异方面具有可预测性，在最初的较小角度下，可以更好地发现骨内缺损的临床发现。
