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T a p e r e d i m p l a n t s f o r b u n d l e b o n e p r e s e r v a t i o n How can the tapered implant design influence bundle bone preservation: An experi- mental study in American Foxhound dogs José Luis Calvo Guirado,a José Eduardo Maté Sánchez de Val,a María Piedad Ramírez Fernández,a Carlos Pérez Albacete Martínez,a Rafael Arcesio Delgado Ruíz,b Sérgio Alexandre Gehrke,a, c José Antonio Benítez Garcíaa & Manuel Fernández Domínguezd a International Dentistry Research Cathedra, Faculty of Health Sciences, Universidad Católica San Antonio de Murcia, Murcia, Spain b Department of Prosthodontics and Digital Technology, School of Dental Medicine. Stony Brook University, Stony Brook, N.Y., U.S. c Catholic University of Uruguay, Montevideo, Uruguay d School of Medicine,Department of Dentistry. CEU San Pablo University, Madrid, Spain C o r r e s p o n d i n g a u t h o r : Prof. José Luis Calvo Guirado Faculty of Health Sciences Universidad Católica San Antonio de Murcia Campus de los Jerónimos Nº 135 Guadalupe 30107 Murcia Spain jlcalvo@ucam.edu H o w t o c i t e t h i s a r t i c l e : Calvo Guirado JL, Maté Sánchez de Val JE, Ramírez Fernández MP, Pérez Albacete Martínez C, Delgado Ruíz RA, Gehrke SA, Benítez García JA. Fernández Domínguez M, How can the tapered implant design influence bundle bone preservation: An experimental study in American Foxhound dogs. J Oral Science Rehabilitation. 2017 Sep;3(3):28–36. Abstract O b j e c t i v e The objective of the present study was to evaluate bone–implant contact (BIC) in a new implant design after immediate and delayed placement at di(cid:2)erent levels in relation to crestal bone in American Foxhound dogs. M a t e r i a l s a n d m e t h o d s The second, third and fourth mandibular premolars and first molars of 6 American Foxhound dogs were extracted bilaterally. At random, 4 immediate implants were placed in the hemimandibles of each dog in the crestal (control group) and subcrestal position (test group). Three dogs were allowed a healing period of 8 weeks; the other 3 had a healing period of 12 weeks. After the healing periods, histomorphometric analysis of the specimens was performed to measure BIC values and bone remod- eling in crestal and subcrestal implants. R e s u l t s All of the implants healed without incident and were available for histo- logical analysis. Lower bone resorption was observed in the group of implants placed subcrestally in healed bone and immediately post- extraction. C o n c l u s i o n Our findings suggest that less resorption can be expected when implants are inserted 2 mm subcrestally overall for both immediate and deferred implants compared with placement at the crestal level. In addition, higher BIC values were found at 12 weeks of follow-up in the group of implants placed subcrestally in healed bone compared with those placed subcre- stally immediately. K e y w o r d s Top DM, tapered implants, healed bone. 28 Volume 3 | Issue 3/2017 Journal of Oral Science & Rehabilitation