Influence of bone tissue deficiency on the outcome of endodontic microsurgery: a prospective study

¹Department of Conservative Dentistry, College of Dentistry, Gangnam Severance Dental Hospital, Seoul, ²Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Seoul & ³College of Dentistry, University College of Dentistry, Gangnam Severance Dental Hospital, Yonsei University, Seoul, Korea