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Implant Dent. 2019 Apr 10. doi: 10.1097/ID.0000000000000887. [Epub ahead of print]

Frequency Values and Their Relationship With the Diameter of Dental Implants. Prospective Study of 559 Implants.

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Research Director, School of Dentistry, Federico Henríquez y Carvajal University, Santo Domingo, Dominican Republic.
Clinical Coordinator, Professor, Department of Clinical Dentistry, School of Biomedical Sciences, European University of Madrid, Madrid, Spain.
Titular Professor, Department of Paediatric Dentistry and Orthopedics, School of Dentistry, Autonomous University of Santo Domingo, Santo Domingo, Dominican Republic.
Head of Department of Dentistry, Professor, School of Biomedical Sciences, European University of Madrid, Madrid, Spain.



The purpose of this prospective study is to evaluate the relationship between implant diameter, and primary and secondary stability.


Five hundred fifty-nine implants with diameters of 3.7, 4.0, and 4.3 mm and lengths of 10 and 11.5 mm were placed in 195 patients. The resonance frequency was measured during surgery and at 3, 6, and 12 months.


Related average implant stability quotient (ISQ) values were 69.62 for 3.7-mm implants, 72.02 for 4.0-mm implants, and 69.67 for 4.3-mm implants. Values in men were greater than values in women. Values were greater for the mandible than for the maxilla. There are significant differences between 4.0-mm implants, and 3.7 anterior maxilla and 4.3 posterior maxilla.


There is no relationship between increased ISQ values and increased diameters. We observed a preference regarding sex, with men having significantly greater values for 3.7- and 4.3-mm diameters. The mandible obtained the greatest ISQ values, with significant differences for diameters 3.7 and 4.3 mm.

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