Department of Periodontics, Kathmandu University School of Medical Sciences, Dhulikhel, Kavrepalanchowk, Nepal.
Chandragiri Dental Home and Implant Centre Pvt. Ltd., Kausaltar, Bhaktapur, Nepal.
JNMA J Nepal Med Assoc. 2024 May 1;62(273). doi: 10.31729/jnma.8400.
The eruption of teeth is considered to be a continuous phenomenon. Two types of eruption are possible namely, active and passive eruption. Failure in passive eruption (by the apical movement of gingiva from the enamel surface) generally results in a clinical condition known as altered passive eruption. It can result in the shortened crown height of a tooth and an esthetically unpleasant situation i.e., excessive gingival display or gummy smile. The main motto of this study was to find out the prevalence of altered passive eruption and associated gingival biotypes in adult patients visiting for dental treatment in tertiary centers along with strategically placed outreach centers.
A descriptive cross-sectional study was done in the Department of Dentistry, Dhulikhel Hospital, and four outreach centers of the same hospital. The study was conducted from October 2022 to April 2023 after obtaining the ethical approval. Convenience sampling was done. Point estimate and 95% Confidence Interval were calculated.
Among 165 patients, the prevalence of altered passive eruption was 21 (12.72%) (7.62-17.78 at 95% Confidence Interval). Furthermore, among 21 patients, the altered passive eruption was seen in the thick biotype patients in 16 (76.19%) and thin biotype patients in 5 (23.81%).
The prevalence of altered passive eruption appeared to be equivalent when compared with the previous studies.
牙齿萌出被认为是一个连续的现象。可能有两种萌出类型，即主动萌出和被动萌出。如果被动萌出失败（由于牙龈从牙釉质表面向根尖方向移动），通常会导致一种称为改变性被动萌出的临床情况。这可能导致牙齿冠高缩短，以及美观上不愉快的情况，即牙龈过度显露或“露龈笑”。本研究的主要目的是在 tertiary centers 及周边地区的牙科就诊的成年患者中，发现改变性被动萌出的流行率以及相关的牙龈生物型。
这是一项在 Dhulikhel 医院的牙科部门和同一医院的四个外展中心进行的描述性横断面研究。该研究在获得伦理批准后，于 2022 年 10 月至 2023 年 4 月进行。采用方便抽样。计算了点估计值和 95%置信区间。
在 165 名患者中，改变性被动萌出的患病率为 21 例（12.72%）（95%置信区间为 7.62-17.78）。此外，在 21 名患者中，改变性被动萌出见于厚生物型患者 16 例（76.19%）和薄生物型患者 5 例（23.81%）。
与之前的研究相比，改变性被动萌出的患病率似乎相当。
