Denture-reversing technique for assessing the soft tissue dimensional changes according to artificial tooth position in completely edentulous patients.

A digital workflow to assess the soft tissue dimensional changes in completely edentulous patients is described. Diagnostic casts obtained at 2 time points and the complete denture were scanned by using a desktop scanner. The denture scan was inverted by using a metrology software program to obtain the soft tissue contour. Using this reversed file as a reference, the file and 2 scan files obtained at different time points were aligned individually with the best fit alignment function. The scanned denture file and the 2 realigned scan files were imported into the same software. A plane vertical to the occlusal plane was determined such that it moved anteroposteriorly. The distance between the contours of the 2 realigned files was measured by selecting a point and a vector based on the artificial tooth positions of the denture. This technique of using a reversed denture file may provide a quantitative evaluation of soft tissue changes and further aid in determining appropriate intervals for denture relining or rebasing.

[1]  D. Tarnow,et al.  The etiology of hard‐ and soft‐tissue deficiencies at dental implants: A narrative review , 2018, Journal of clinical periodontology.

[2]  J. Cawood,et al.  A classification of the edentulous jaws. , 1988, International journal of oral and maxillofacial surgery.

[3]  C. Tomasi,et al.  Ridge Dimensions of the Edentulous Mandible in Posterior Sextants: An Observational Study on Cone Beam Computed Tomography Radiographs , 2017, Implant dentistry.

[4]  C. F. Parkinson.  Similarities in resorption patterns of maxillary and mandibular ridges. , 1978, The Journal of prosthetic dentistry.

[5]  Douglas Allen Atwood,et al.  Postextraction changes in the adult mandible as illustrated by microradiographs of midsagittal sections and serial cephalometric roentgenograms , 1963 .

[6]  D A Atwood,et al.  Clinical, cephalometric, and densitometric study of reduction of residual ridges. , 1971, The Journal of prosthetic dentistry.

[7]  K. Wical,et al.  Studies of residual ridge resorption. I. Use of panoramic radiographs for evaluation and classification of mandibular resorption. , 1974, The Journal of prosthetic dentistry.

[8]  M. Kreisler,et al.  Residual ridge resorption in the edentulous maxilla in patients with implant-supported mandibular overdentures: an 8-year retrospective study. , 2003, The International journal of prosthodontics.

[9]  R. Starinsky,et al.  Morphologic characteristics of bony edentulous jaws. , 2007, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[10]  L. Trombelli,et al.  Alveolar ridge dimensions in maxillary posterior sextants: a retrospective comparative study of dentate and edentulous sites using computerized tomography data. , 2011, Clinical oral implants research.