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The influence of overhanging restoration margins on interproximal alveolar bone levels in general dental practice.
British Dental Journal ( IF 2.0 ) Pub Date : 2019-08-01 , DOI: 10.1038/s41415-019-0530-1
Brian Millar 1 , Karen Blake 1
Affiliation  

Aim To determine the prevalence of restoration overhangs in a general dental practice and investigate if these are associated with an increase in the rate of alveolar bone loss locally.Methods Historical dental records were randomly and anonymously selected from the records of patients in a general dental practice. The most recent bitewing radiographs were examined and any overhangs were recorded along with location. Sequential bitewing radiographs were examined so that the restored tooth with an overhang could be compared over time with a similar but unrestored tooth which acted as a control.Results A total of 111 dental records were audited and an overhang was observed in 67 cases. The prevalence of overhangs was greatest on upper molar teeth. Bone loss was calculated from 35 historical sets of bitewing radiographs over a period of up to 25 years. The mean bone loss on the unrestored control teeth was 0.06 mm/year and on the teeth adjacent to the overhangs it was 0.16 mm/year. This difference of 0.1 mm/year was statistically significant (paired t-test, P = 0.01). There was no significant difference between males and females. The mean size of the overhang was 0.9 mm (range 0.4-2.0 mm) with the bigger overhangs being associated with greater bone loss; however, not all ledges were associated in bone loss.Conclusions Restoration overhangs can be associated with increased bone loss and larger overhangs may be most problematic, although other factors are involved as not all ledges caused bone loss.

中文翻译:

一般牙科实践中,悬垂的修复边缘对牙槽间牙槽骨水平的影响。

目的确定一般牙科实践中的修复悬垂患病率,并调查其是否与局部牙槽骨丢失率增加有关。方法从一般牙科实践中的患者记录中随机和匿名地选择历史牙科记录。检查了最新的咬合射线照相,并记录了所有悬垂以及位置。检查了连续咬合的X射线照片,以便可以将随时间变化的修复牙齿与作为对照的相似但未恢复的牙齿进行比较。结果共检查了111例牙齿记录,在67例患者中观察到了悬突。悬突的患病率在上磨牙上最大。骨丢失是根据长达35年的35个历史记录的X线片计算得出的。未修复的对照牙齿的平均骨质流失为0.06 mm /年,与突出端相邻的牙齿的平均骨质流失率为0.16 mm /年。0.1毫米/年的差异具有统计学意义(配对t检验,P = 0.01)。男性和女性之间没有显着差异。悬突的平均大小为0.9毫米(0.4-2.0毫米),悬突越大与骨丢失越大有关。结论并非所有壁架都与骨丢失有关。结论悬垂恢复可能与骨丢失增加有关,而较大的悬垂可能是最成问题的,尽管还涉及其他因素,因为并非所有壁架都会导致骨丢失。06毫米/年,在悬垂附近的牙齿上为0.16毫米/年。0.1毫米/年的差异具有统计学意义(配对t检验,P = 0.01)。男性和女性之间没有显着差异。悬突的平均大小为0.9毫米(0.4-2.0毫米),悬突越大与骨丢失越大有关。结论并非所有壁架都与骨丢失有关。结论悬垂恢复可能与骨丢失增加有关,而较大的悬垂可能是最成问题的,尽管还涉及其他因素,因为并非所有壁架都会导致骨丢失。06毫米/年,在悬垂附近的牙齿上为0.16毫米/年。0.1毫米/年的差异具有统计学意义(配对t检验,P = 0.01)。男性和女性之间没有显着差异。悬突的平均大小为0.9毫米(0.4-2.0毫米),悬突越大与骨丢失越大有关。结论并非所有壁架都与骨丢失有关。结论悬垂恢复可能与骨丢失增加有关,而较大的悬垂可能是最成问题的,尽管还涉及其他因素,因为并非所有壁架都会导致骨丢失。0毫米),较大的突出部分会导致更大的骨质流失;结论并非所有壁架都与骨丢失有关。结论悬垂恢复可能与骨丢失增加有关,而较大的悬垂可能是最成问题的,尽管还涉及其他因素,因为并非所有壁架都会导致骨丢失。0毫米),较大的突出部分会导致更大的骨质流失;结论并非所有壁架都与骨丢失有关。结论悬垂恢复可能与骨丢失增加有关,而较大的悬垂可能是最成问题的,尽管还涉及其他因素,因为并非所有壁架都会导致骨丢失。
更新日期:2019-08-09
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