title: What do sales data tell us about implant survival?
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of implant diameter, length and shape on a surrogate parameter of implant survival; i.e. the implant return rate in a big data analysis.
  
  
  METHODS
  A retrospective study was conducted and the factors influencing the success rates of 69,377 sold implants over a seven-year period were evaluated. The osseointegration program of a reseller provides reliable data of a single country. Implant loss rates were investigated using logistic regression models and regressed by implant type, diameter, and length.
  
  
  RESULTS
  The return rate of 69,377 sold implants was 2.78% and comparable to implant loss rates in previous published prospective studies as its surrogate parameter. A total of 80% of implant returns had occurred within 157 days, and an additional 15% within 750.25 days. Diameters of 3.8 to 5.0mm showed the lowest return rates with its bottom in the 4.3mm implant whilst 6.0mm implants had significantly higher return rates. In comparison to the most sold implant length (13mm) shorter implants showed significantly higher early return rates.
  
  
  CONCLUSIONS
  The study provides evidence that in cases of standard indications and sufficient bone, the use of screw typed dental implants with 3.8 or 4.3 diameter and 11 or 13 mm length shows the lowest implant return rates. Other implants may be selected only in specific indications.
authors.affiliation: University Clinic of Cranio-, Maxillofacial and Oral Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Rudolf
authors.initials: R
authors.lastname: Seemann
authors.affiliation: Alexas AG, Mauren, Liechtenstein.
authors.forename: Alexander
authors.initials: A
authors.lastname: Jirku
authors.affiliation: University Clinic of Cranio-, Maxillofacial and Oral Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Florian
authors.initials: F
authors.lastname: Wagner
authors.affiliation: University Clinic of Cranio-, Maxillofacial and Oral Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Arno
authors.initials: A
authors.lastname: Wutzl
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001317:Austria; D003132:Commerce / Q000706:statistics & numerical data*; D015921:Dental Implants / Q000191:economics / Q000706:statistics & numerical data*; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure / Q000191:economics / Q000706:statistics & numerical data*; D003920:Diabetes Mellitus / Q000453:epidemiology; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012907:Smoking / Q000453:epidemiology; D013997:Time Factors
chemical_list: D015921:Dental Implants