Effect of Alveolar Ridge Preservation with PDFDBA on Orthodontic Tooth Movement Rate, Formation of Gingival Invagination and Root Resorption: A Randomized, Controlled Pilot Study
Ali Sharif Moqadam1, Valiollah Arash1, Maysam Mirzaie1, Majid Fereydooni2, Hamid Haghani3 and Aghil Rahmani1

1Department of Orthodontics, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.

2Department of Periodontology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.

3Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.

Corresponding Author E-mail: vali_arash1344@yahoo.com

Abstract: Tooth extraction results in resorptive remodeling of the alveolar bone,but alveolar ridge preservationprocedure maintains the original shape of the extraction socket. This may be beneficial for space closure by orthodontic tooth movement (OTM). In the current pilot study forrandomized controlled clinical trial the effect of alveolar ridge preservationwith partial demineralized freeze-dried bone allograft (PDFDBA) on OTM rate, formation of gingival invagination and root resorptionwas evaluated. Both mandibular first premolars of6 patients were extracted due to orthodontic treatment. In a split-mouth study design,alveolar ridge preservation was performed on one side, while the other side served as a control and the extraction socket healed naturally. After 6 weeks of healing period, the canines were moved to the extraction siteto close the extraction space. Eight weeks later, the amount of OTM was measured. After space closure, the extraction sites were examined for the presence of gingival invagination. Root resorption was evaluated on digital panoramic radiographs. Photographs were taken for documentation. There was no significant difference in OTM rate betweenthe ridge preserved areas and naturally healed sockets. Gingival invagination formed in 5 of 6 naturally healed sockets; none of the ridge preserved areas showed formation of gingival invagination. No root resorption was observed in any of the teeth adjacent to the extraction sites. Alveolar ridge preservation with PDFDBA has no effect on the rate of OTM and root resorptionbut preventsformation of gingival invagination during orthodontic space closure.

Keywords: socket graft; allograft; tooth movement; root resorption

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