Change in abutment teeth mobility
after insertion of partial denture

---

Atsushi Ito, Shoji Kohno, Shingo Iwakata*
Department of Removable Prosthodontics, School of Dentistry,
Niigata University (Chief: Prof: Shoji Kohno)
*Polyclinic Intensive Oral Care Unit, School of Dentistry,
Niigata University (Director: Prof. Shoji Kohno)

---

Abstract: The purpose of this study was to clarify the effect caused by insertion of denture on the mobility of abutment teeth.
        Twenty-two patients in whom partial dentures were inserted at the Dental Clinic of Niigata University School of Dentistry, between August 1994 and March 1995 gave their informed consent for the experimental procedure.
        To evaluate changes in tooth mobility, the Periotest (PT) value of 59 abutment teeth within 18 months after initial insertion were measured and the following factors were analyzed.
        1) change in PT value of all abutment teeth
        2) comparison between changes in PT value upper and lower abutment teeth
        3) relationship between PT value of initial insertion of denture (baseline) and post-insertion increasing periods of time
        4) relationship between type of clasp and change in PT value
        The result were follows:
        1. The average PT value of all abutment teeth showed no significant changes as compared to the baseline.
        2. The PT value of upper abutment teeth was not significantly different to the baseline, but that of the lower abutment teeth was significantly lower.
        3. The effect of increasing periods of time on mobility was higher in the groups of teeth with medium mobility at initial insertion than in those with none.
        4. The type of clasp did not cause significant changes. 

---

back to contents