TY - JOUR
T1 - Bone metabolism of residual ridge beneath the denture base of an RPD observed using NaF-PET/CT
AU - Suenaga, Hanako
AU - Yokoyama, Masayoshi
AU - Yamaguchi, Keiichiro
AU - Sasaki, Keiichi
N1 - Funding Information:
This work was supported in part by Grants-in-Aid for Young Scientists (Start-up) (20890021) (2008–2009) and Young Scientists (B) (22791865) (2010–2011) from the Ministry of Education, Culture, Sports, Science and Technology of Japan .
PY - 2012/1
Y1 - 2012/1
N2 - Patient: A 66-year-old woman, who had a bilateral free-end edentulous mandible and no experience with dentures, was examined for the chief complaint of masticatory dysfunction on left side of dental arch. A unilateral distal extension removable partial denture (RPD) replacing lower-left molars was selected. Tomographic images were obtained using Fluorine-18 NaF positron emission computerized tomography (NaF-PET)/ computed tomography (CT) before the RPD use and at 1, 6, and 13 weeks after the RPD use to observe the metabolic changes in residual bone caused by the RPD use. PET standardized uptake values (SUVs) and CT values were calculated for lower-left edentulous site (test side) and lowerright edentulous site (control side). As a result, SUVs on the control side remained static after the RPD use, whereas those on the test side increased at 1 and 6 weeks after the RPD use and then decreased. However, CT images showed no obvious changes in the bone shape and structure beneath RPD, and CT values both on the control and test sides did not change either. Discussion: This report shows that NaF-PET could detect bone metabolic changes soon after the RPD use, which cannot be detected by clinical Xrays. The SUV changes may be a mechanobiological reaction to the pressure due to the RPD use, and wearing of the RPD may increase the bone turnover beneath denture. Conclusion: This report demonstrates that wearing of an RPD increases bone turnover beneath denture immediately after the RPD use without clinically detectable changes in bone structure or volume.
AB - Patient: A 66-year-old woman, who had a bilateral free-end edentulous mandible and no experience with dentures, was examined for the chief complaint of masticatory dysfunction on left side of dental arch. A unilateral distal extension removable partial denture (RPD) replacing lower-left molars was selected. Tomographic images were obtained using Fluorine-18 NaF positron emission computerized tomography (NaF-PET)/ computed tomography (CT) before the RPD use and at 1, 6, and 13 weeks after the RPD use to observe the metabolic changes in residual bone caused by the RPD use. PET standardized uptake values (SUVs) and CT values were calculated for lower-left edentulous site (test side) and lowerright edentulous site (control side). As a result, SUVs on the control side remained static after the RPD use, whereas those on the test side increased at 1 and 6 weeks after the RPD use and then decreased. However, CT images showed no obvious changes in the bone shape and structure beneath RPD, and CT values both on the control and test sides did not change either. Discussion: This report shows that NaF-PET could detect bone metabolic changes soon after the RPD use, which cannot be detected by clinical Xrays. The SUV changes may be a mechanobiological reaction to the pressure due to the RPD use, and wearing of the RPD may increase the bone turnover beneath denture. Conclusion: This report demonstrates that wearing of an RPD increases bone turnover beneath denture immediately after the RPD use without clinically detectable changes in bone structure or volume.
KW - Bone metabolism
KW - NaF-PET
KW - RPD
KW - Residual ridge
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U2 - 10.1016/j.jpor.2011.04.002
DO - 10.1016/j.jpor.2011.04.002
M3 - Article
C2 - 21659012
AN - SCOPUS:84856722317
VL - 56
SP - 42
EP - 46
JO - Nippon Hotetsu Shika Gakkai zasshi
JF - Nippon Hotetsu Shika Gakkai zasshi
SN - 1883-1958
IS - 1
ER -