The effect of removable partial dentures on alveolar bone resorption: a retrospective study with cone-beam computed tomography.
OBJECTIVE
The aim of this study was to compare vertical and horizontal mandibular alveolar bone resorption by measuring bone morphological variation in Kennedy Class II removable partial denture (RPD) wearers and non-wearers using cone-beam computed tomography (CBCT).


METHODS
In total, 124 sites in the CBCT scans of 62 (29 RPD non-wearers, 33 RPD wearers) Kennedy Class II patients were analyzed retrospectively. Three-dimensional representations of the mandible with superimposed cross-sectional slices were developed with the CBCT scans to evaluate the mandibular alveolar height and width by measuring distances between the mandibular canal, mylohyoid ridge, alveolar crest, and lower border of the mandible in four regions (eight sites) of Kennedy Class II non-wearers and wearers of RPDs.


RESULTS
Mandibular alveolar bone height and width were significantly lower in edentulous sites when compared with dentate sites in both Kennedy Class II non-wearers and wearers of RPDs (p < 0.05). Additionally, mean vertical and horizontal mandibular bone resorption was significantly higher in RPD wearers than in non-wearers (p < 0.05).


CONCLUSIONS
Vertical and horizontal alveolar bone resorption was found to be higher in the RPD wearing patients when comparing the dentate and edentulous sites.
Department of Prosthodontics, Near East University, Faculty of Dentistry, Mersin 10, Turkey. oguzozan@gmail.com
Oguz
O
Ozan
Kaan
K
Orhan
Secil
S
Aksoy
Murat
M
Icen
Burak
B
Bilecenoglu
Bayram Ufuk
BU
Sakul
D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging* / Q000209:etiology*; D016022:Case-Control Studies; D054893:Cone-Beam Computed Tomography; D003832:Denture, Partial, Removable / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology*; D008875:Middle Aged; D012189:Retrospective Studies; D018709:Statistics, Nonparametric