参考文献

[1]Chen ST,Buser D.Esthetic outcomes following immediate and early implant placement in the anterior maxilla—a systematic review[J].Int J Oral Maxillofac Implants,2014,29(Suppl):186-215.

[2]宿玉成.口腔种植学[M].2版.北京.人民卫生出版社.2014.

[3]宿玉成.国际口腔种植学会（ITI）口腔种植临床指南：牙种植学的负荷方案——牙列缺失的负荷方案[M].北京：人民军医出版社，2011.(https://www.daowen.com)

[4]宿玉成.国际口腔种植学会（ITI）口腔种植临床指南：美学区连续多颗牙缺失间隙的种植修复[M].北京：人民军医出版社，2013.

[5]Maló P,de Araújo Nobre M,Lopes A,et al.The All-on-4 concept for full-arch rehabilitation of the edentulous maxillae:A longitudinal study with 5-13 years of follow-up[J].Clin Implant Dent Relat Res,2019:28.