title: Effect of implant macro-design on primary stability: A prospective clinical study.
abstract: BACKGROUND
  Implant restorations have become a high predictable treatment option. Several caracteristics such as surgical technique and implant design can influence the treatment outcomes. The aim of the present study was to evaluate the influence of implant macro-design on primary stability measured with resonance frequency analysis (RFA) and insertion torque (IT). Material and Mehods: A total of 47 implants divided in two groups: Test group (TI): 22 Tapered MIS® Seven implants; Control group (CI): 25 cylindrical Astra® Osseospeed implants. All implants were inserted following the manufacturers' standard protocols. Implant primary stability was measured at the moment of implant placement by registering insertion torque values (ITv) and ISQ values by means of Osstell™ Mentor (ISQv) (Integration Diagnostic Ltd., Goteborg, Sweden).
  
  
  RESULTS
  In the mandible, mean ISQv for tapered implants (TI) was 71.67±5.16 and for cylindrical implants (CI) 57.15±4.83 (p=0.01). Mean insertion torque was 46.67±6.85 Ncm for TI and 35.77±6.72 Ncm for CI (p=0.01). In the maxilla, mean ISQ was 67.2±4.42 for tapered implants and 49.17±15.30 for cylindrical implants (p=0.01). Mean insertion torque for TI was 41.5±6.26 Ncm and for CI 39.17±6.34 Ncm (p>0.05). For tapered implants, no correlation could be found between implant diameter and primary stability. But for cylindrical implants there was a statistically significant correlation between implant diameter and primary stability: ITv (p=0.03); ISQv (p=0.04).
  
  
  CONCLUSIONS
  Within the limits of the present study, tapered shaped implants achieve higher primary stability measured through ISQ and insertion torque values. Moreover, for cylindrical implants positive correlation has been established between implant diameter and primary stability.
authors.affiliation: Universitat Internacional de Catalunya, c/ Josep Trueta s/n, 08195 Sant Cugat del Vallès, Barcelona, Spain, jgargallo@uic.es.
authors.forename: Naroa
authors.initials: N
authors.lastname: Lozano-Carrascal
authors.forename: Oscar
authors.initials: O
authors.lastname: Salomó-Coll
authors.forename: Marta
authors.initials: M
authors.lastname: Gilabert-Cerdà
authors.forename: Nuria
authors.initials: N
authors.lastname: Farré-Pagés
authors.forename: Jordi
authors.initials: J
authors.lastname: Gargallo-Albiol
authors.forename: Federico
authors.initials: F
authors.lastname: Hernández-Alfaro
mesh_terms: D000328:Adult; D015921:Dental Implants; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D003781:Denture Retention; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies
chemical_list: D015921:Dental Implants
references.citation: Clin Implant Dent Relat Res. 2003;5(2):71-7
references.pmid: 14536040
references.citation: Int J Prosthodont. 2012 Sep-Oct;25(5):465-71
references.pmid: 22930768
references.citation: Int J Oral Maxillofac Implants. 2006 Jul-Aug;21(4):560-6
references.pmid: 16955606
references.citation: Clin Oral Implants Res. 2010 Jun;21(6):605-11
references.pmid: 20666787
references.citation: Clin Oral Implants Res. 2004 Aug;15(4):474-80
references.pmid: 15248883
references.citation: J Oral Rehabil. 2010 Feb;37(2):131-7
references.pmid: 20002529
references.citation: Int J Oral Maxillofac Implants. 2009 Nov-Dec;24(6):1015-32
references.pmid: 20162105
references.citation: Med Oral Patol Oral Cir Bucal. 2009 Sep;14(9):e455-60
references.pmid: 19718009
references.citation: Implant Dent. 2014 Dec;23(6):672-8
references.pmid: 25365649
references.citation: Clin Implant Dent Relat Res. 2014 Apr;16(2):166-71
references.pmid: 22726877
references.citation: Implant Dent. 2004 Dec;13(4):310-21
references.pmid: 15591992
references.citation: Clin Oral Investig. 2015 Jan;19(1):1-10
references.pmid: 25366871
references.citation: Clin Implant Dent Relat Res. 2011 Sep;13(3):215-23
references.pmid: 19744197
references.citation: Periodontol 2000. 2008;47:51-66
references.pmid: 18412573
references.citation: Clin Implant Dent Relat Res. 2010 Sep;12(3):194-201
references.pmid: 19438965
references.citation: Clin Implant Dent Relat Res. 2014 Feb;16(1):89-95
references.pmid: 22691157
references.citation: Int J Prosthodont. 1998 Sep-Oct;11(5):491-501
references.pmid: 9922740
references.citation: Dent Res J (Isfahan). 2014 Jan;11(1):87-91
references.pmid: 24688566
references.citation: J Dent (Tehran). 2011 Fall;8(4):186-200
references.pmid: 22509458
references.citation: Clin Implant Dent Relat Res. 2003;5(1):57-60
references.pmid: 12831730
references.citation: Clin Implant Dent Relat Res. 2000;2(2):85-92
references.pmid: 11359268
references.citation: Int J Oral Maxillofac Implants. 2006 Sep-Oct;21(5):726-32
references.pmid: 17066633
references.citation: Clin Implant Dent Relat Res. 2015 Oct;17(5):950-6
references.pmid: 24506148
references.citation: Clin Oral Implants Res. 1996 Sep;7(3):261-7
references.pmid: 9151590
references.citation: Clin Oral Implants Res. 2010 Feb;21(2):228-36
references.pmid: 20070756
references.citation: Clin Oral Implants Res. 2002 Apr;13(2):127-32
references.pmid: 11952732
references.citation: J Oral Rehabil. 2010 Dec;37(12):900-7
references.pmid: 20529176
references.citation: Interv Med Appl Sci. 2013 Dec;5(4):162-7
references.pmid: 24381734
references.citation: Implant Dent. 2006 Dec;15(4):324-33
references.pmid: 17172948
references.citation: Implant Dent. 2014 Feb;23(1):69-73
references.pmid: 24384740