Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
Int J Environ Res Public Health. 2021 Feb 1;18(3):1283. doi: 10.3390/ijerph18031283.
The aim of this study was to investigate and compare the level of halitosis in patients with/without fixed crowns and in addition the influence of various crown parameters on halitosis was also explored.
In total, 96 subjects (fixed crowns = 52; no crowns = 44) participated in the study. The levels volatile sulphur compounds (VSCs) of hydrogen sulphide (H2S), methyl mercaptan (CH3SH), and dimethyl sulphide (CH3SCH3) were evaluated with breath samples using gas chromatography and used for classification as presence or absence of halitosis. The periodontal clinical parameters for all the participants as well as the crown parameters for participants with fixed crowns were also evaluated. Cross tabulation, Chi-square test, and one-way analysis of variance tests were used for the statistical analysis and comparisons.
Breath samples revealed, 50 (52.1%) participants were suffering from halitosis. Out of VSCs, the level of CH3SCH3 (62.5%) was found to be the most prevalent. Significant correlations were observed between the presence of fixed crowns and oral halitosis ( < 0.001). Statistically significant difference in the concentration of H2S and CH3SH ( < 0.001) and no significance for CH3SCH3 ( = 0.075) between patients with/without fixed crowns was found. The presence of halitosis was more prevalent in the subjects with crown parameters (subgingival margin, over-contoured margin, open-crown margin, over-contoured and under-contoured crowns) considered clinically defective/unacceptable ( < 0.05).
Presence of fixed dental crowns significantly contributes to the oral halitosis. Dental crowns with defects significantly impair the hygienic conditions and oral microflora resulting in high prevalence of halitosis.
本研究旨在调查和比较有/无固定冠患者口臭的水平，并探讨各种冠参数对口臭的影响。
共有 96 名受试者（固定冠 52 名；无冠 44 名）参与了这项研究。使用气相色谱法评估氢硫化物 (H2S)、甲硫醇 (CH3SH) 和二甲硫醚 (CH3SCH3) 的挥发性硫化合物 (VSCs) 水平，并将其用于分类存在或不存在口臭。还评估了所有参与者的牙周临床参数以及有固定冠的参与者的冠参数。使用交叉表、卡方检验和单向方差分析进行统计分析和比较。
呼气样本显示，50 名（52.1%）参与者患有口臭。在 VSCs 中，CH3SCH3 的水平（62.5%）被发现最为普遍。有固定冠和口腔口臭之间存在显著相关性（<0.001）。有/无固定冠患者之间 H2S 和 CH3SH 的浓度存在统计学显著差异（<0.001），而 CH3SCH3 无差异（=0.075）。在被认为临床有缺陷/不可接受的冠参数（龈下边缘、过度轮廓边缘、开冠边缘、过度和不足轮廓冠）存在的情况下，口臭的存在更为普遍（<0.05）。
固定牙冠的存在显著导致口腔口臭。有缺陷的牙冠会严重损害口腔卫生状况和口腔微生物群，导致口臭高发。
