表 1. Top 10 countries in terms of the number of published papers concerning preclinical dentistry education from 1991 to 2021.

1991–2021年口腔临床前教育相关研究论文主要发文国家（前10位）

Ranking	Country	Centrality	Total number of articles published	The year of the first published article
1	The United States	0.43	98	1992
2	Saudi Arabia	0.09	29	2005
3	Germany	0.07	26	2012
4	The United Kingdom	0.13	24	1998
5	China	0.01	22	2008
6	India	0.00	12	2013
7	Turkey	0.00	12	2008
8	Australia	0.01	11	2010
9	Japan	0.04	9	2008
10	Netherlands	0.00	8	2005