Nguyen-Hieu Tung, Ha Thi Bao Dan, Do Thu Hang, Tran Giao Hoa
Department of Periodontology, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam.
Oral Health Dent Manag. 2012 Sep;11(3):134-44.
Several studies have shown a large diversity in the prevalence, extent and severity of gingival recession as well as controversial conclusions of its associated factors. Therefore, the aim of this pilot study was to evaluate gingival recession with predisposing factors in young Vietnamese.
A cross-sectional study using clinical examination was performed in 120 dental students. Oral hygiene status, tooth malposition and fraenal attachment were recorded. The width of keratinised gingiva was measured after mucosa staining with Lugol's iodine solution. Measurements of gingival recession were performed on labial tooth surfaces. Chisquare test, t-test and Pearsonâs correlation were used for data analysis.
The prevalence of gingival recession was 72.5% of the studied population. The extent of affected teeth was 11.1% of the examined teeth. The proportion of root-surface exposure was statistically higher (P<0.05) in the maxilla (12.5%) than in the mandible (9.6%). Premolars and right canines were the teeth most frequently and most seriously associated with gingival recession, respectively. There was a strong negative correlation between narrow width of keratinised gingiva and gingival recession (P<0.001). The recession was statistically associated with tooth malposition (P<0.001) but it was not related to high fraenal attachment and gender.
A high prevalence of gingival recession was found in Vietnamese dental students. Gingival recession was associated with narrow width of keratinised gingiva, tooth malposition and maxillary teeth. Further studies performed in larger populations with more extended age groups are needed to confirm these findings.
多项研究表明，牙龈退缩的患病率、范围和严重程度存在很大差异，其相关因素的结论也存在争议。因此，本初步研究的目的是评估越南年轻人牙龈退缩及其诱发因素。
对120名牙科学生进行了一项采用临床检查的横断面研究。记录口腔卫生状况、牙齿错位和系带附着情况。用卢戈氏碘溶液对黏膜染色后测量角化龈宽度。在牙齿唇面测量牙龈退缩情况。采用卡方检验、t检验和皮尔逊相关性分析进行数据分析。
研究人群中牙龈退缩的患病率为72.5%。受影响牙齿的范围占检查牙齿的11.1%。上颌骨（12.5%）牙根面暴露的比例在统计学上高于下颌骨（9.6%）（P<0.05）。前磨牙和右上尖牙分别是与牙龈退缩最常和最严重相关的牙齿。角化龈宽度窄与牙龈退缩之间存在很强的负相关性（P<0.001）。牙龈退缩在统计学上与牙齿错位相关（P<0.001），但与高系带附着和性别无关。
在越南牙科学生中发现牙龈退缩的患病率很高。牙龈退缩与角化龈宽度窄、牙齿错位和上颌牙齿有关。需要在更大人群和更广泛年龄组中进行进一步研究以证实这些发现。
