Download Abstract - Journal of Dental School

J Dent Sch 2011;29(3)
6
Tissue reactions in the socket preservation using NanoBone T M
following orthodontic tooth movement
1
Seifi M. DDS.MS. 2Gholami GH. DDS.,MS. 3Tahmasbi S. DDS.,MS. 4Arayesh A. DDS.
1
Professor, Dept. of Orthodontics, Iran Center for Dental Research &Dental School, Shahid Beheshti University of
Medical Sciences, Tehran-Iran.
2
Associate Professor, Dept. of Periodontics, Iran Center for Dental Research &Dental School, Shahid Beheshti
University of Medical Sciences, Tehran-Iran.
3
Assistant Professor, Dept. of Orthodontics, Dentofacial Deformities Research Center &Dental School, Shahid
Beheshti University of Medical Sciences, Tehran-Iran.
4
Dentist
Abstract
Background and Aim: Bone substitute biomaterials can prevent severe root resorptions during orthodontic treatments
by induction of new bone formation leading in more healthy periodontal status after treatment. Furthermore,
NanoBoneTM graft offers several advantages to be applied in the surgery defects due to its nanocrystalline hydroxy
apatite components and nanosized biomaterial structures. The purpose of this study was to evaluate the tissue reactions
in the socket preservation using NanoBoneTM following orthodontic tooth movement.
Materials & Methods: In this experimental study, 4 dogs were selected of the mixed race following defects preparations in
the mesial aspect of the first premolar in each quadrant of the animals. NanoBoneTM was applied in one side as a case region
while the opposite side remained hollow as a control side. The first premolar was moved mesially using orthodontic forces
and the orthodontic tooth movement was calculated at different time intervals. When the teeth reached half the way, the
animals were sacrificed and the sections were subjected to histopathologic assessments. The orthodontic tooth movement
values were analyzed using three-way ANOVA test.
Results: The mean overall premolar movement towards canine in the socket filled with NanoBoneTM was 1.076mm
while it was 1.203mm in the control side. No significant differences were noted regarding the graft material, the time
and jaw position. Root resoprtion was evident in the pressure regions of both groups and new bone formation was
noted in the defects filled using NanoBoneTM.
Conclusion: It was concluded that NanoBoneTM has osteoconductive properties with the decreased root resoprtion due
to the limited tooth movements. Therefore, the tooth can be moved into the NanoBone TM graft material and the graft
can be used as a substitution for autogenous bone during orthodontic tooth movements.
Key Words: Orthodontic tooth movement, Bone formation, NanoBoneTM