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手术牙冠延长术后生物学宽度的临床评估：一项前瞻性研究。

Clinical evaluation of the biological width following surgical crown-lengthening procedure: A prospective study.

作者信息

Shobha K S, Seshan Hema, Mani R, Kranti K

机构信息

Sri Siddhartha Dental College and Hospital, Tumkur, India.

出版信息

J Indian Soc Periodontol. 2010 Jul;14(3):160-7. doi: 10.4103/0972-124X.75910.

DOI:10.4103/0972-124X.75910
PMID:21760669
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3100858/
Abstract

BACKGROUND AND OBJECTIVES

The purpose of this study was to evaluate the positional changes of the periodontal tissues, particularly the biological width, following surgical crown-lengthening in human subjects.

MATERIALS AND METHODS

A clinical trial study involving 15 patients was carried out for a period of 6 months. Sites were divided into 3 groups: treated (TT) sites, adjacent (AD) sites and nonadjacent (NAD) sites. Free gingival margin [FGM], attachment level, pocket depth, bone level, biological width [BW] were recorded at baseline, 1, 3 and 6 months. Direct bone level after flap reflection was recorded before and after osseous resection at baseline only. Level of osseous crest was lowered based on BW, and supracrestal tooth structure needed using a combination of rotary and hand instruments.

STATISTICAL ANALYSIS

Student t test and ANOVA were used.

RESULTS

Overall, apical displacement of FGM at TT, AD and NAD sites was statistically significant compared to baseline. The apical displacement of FGM at TT site was more when compared to that at AD and NAD sites at 3 and 6 months. The BW at the TT site was smaller at 1, 3 and 6 months compared to that at baseline. However, at all sites, BW was reestablished to the baseline value at the end of 6 months.

INTERPRETATION AND CONCLUSION

The BW at TT sites was reestablished to its original vertical dimension by 6 months. In addition, a consistent 2-mm gain of coronal tooth structure was observed at the 1, 3 and 6-month examinations.

摘要

背景与目的

本研究旨在评估人体进行外科牙冠延长术后牙周组织的位置变化，尤其是生物学宽度的变化。

材料与方法

对15例患者进行了为期6个月的临床试验研究。将部位分为3组：治疗部位（TT）、相邻部位（AD）和非相邻部位（NAD）。在基线、1个月、3个月和6个月时记录游离龈缘[FGM]、附着水平、牙周袋深度、骨水平、生物学宽度[BW]。仅在基线时记录翻瓣后骨切除前后的直接骨水平。根据生物学宽度降低骨嵴水平，使用旋转器械和手动器械相结合的方式去除龈上牙体结构。

统计分析

采用学生t检验和方差分析。

结果

总体而言，与基线相比，TT、AD和NAD部位的游离龈缘根尖向移位具有统计学意义。在3个月和6个月时，TT部位的游离龈缘根尖向移位比AD和NAD部位更明显。与基线相比，TT部位在1个月、3个月和6个月时的生物学宽度更小。然而，在所有部位，生物学宽度在6个月末均恢复至基线值。

解读与结论

TT部位的生物学宽度在6个月时恢复至其原始垂直尺寸。此外，在1个月、3个月和6个月的检查中均观察到牙冠结构一致地增加了2毫米。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da46/3100858/87a43c109fbc/JISP-14-160-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da46/3100858/0a94bed116b9/JISP-14-160-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/da46/3100858/6f3ed0a3c406/JISP-14-160-g018.jpg

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