title: Validity of ridge mapping and cone beam computed tomography in dental implant therapy.
abstract: OBJECTIVE
  The purpose of this study was to compare the validity of alveolar ridge measurements obtained with ridge mapping (RM) technique against cone beam computed tomography (CBCT) measurements.
  
  
  METHODS
  Twenty partially edentulous patients were recruited for implant placement in the Clinic of San Martin de Porres University. For all the measurements, a vacuum-formed stent was fabricated for each subject. A buccal and lingual point was made in the stent to provide a reference of measurement for each implant site. RM measurements with the stent were obtained before and after surgical flap reflection. Two calibrated observers made the CBCT images measurements. T-test was used for the statistical analysis. Values <0.05 were considered statistically significant. Also, specificity and sensibility of CBCT and RM were compared. Intra-class correlation coefficient (ICC)_ was measure between CBCT measurements.
  
  
  RESULTS
  A total of 62 implants sites were evaluated. No statistical significant differences were obtained with CBCT and RM measurements (P = 0,207). Detecting proper buccal-lingual ridge, the sensitivity and specificity were 59% and 91% for RM while CBCT obtained 92% of sensitivity and 94% of specificity. Concordance was found "good" (ICC 0.82).
  
  
  CONCLUSIONS
  Both methods provide valid measurements. Even though, we found diagnostic limitations in the RM, it demonstrated to be a useful method for its exactitude, low cost, the immediate result and no need of radiation. CBCT was recommended when the bone ridge width and height were in the less than ideal for conventional dental implant placement.
authors.affiliation: Specialty of Periodontics and Dental Implants, Cientifica del Sur University, Lima, Perú ; Specialty of Periodontics, San Martín de Porres University, Lima, Perú
authors.forename: Carmen Teresa
authors.initials: CT
authors.lastname: Castro-Ruiz
authors.affiliation: Specialty of Periodontics, San Martín de Porres University, Lima, Perú
authors.forename: Jorge
authors.initials: J
authors.lastname: Noriega
authors.affiliation: Specialty of Periodontics and Dental Implants, Cientifica del Sur University, Lima, Perú
authors.forename: Maria Eugenia
authors.initials: ME
authors.lastname: Guerrero
keywords: Cone beam; dental implants; ridge mapping