The effects of partial denture design on the mobility of abutment teeth. An investigation

The objects of this investigation were to discover the methods by which general dental practitioners communicated partial denture designs to dental laboratories and to ascertain the extent to which certain design criteria were being followed. The results of the survey showed that the responsibility for design appeared to be largely delegated to the technician. In most instances cobalt-chromium dentures were produced which would assist in maintaining oral health; however, this was not the case with acrylic dentures.

Section: Cobalt-chrominm Dentures (/) Numbers Of Denturesmentioning

confidence: 75%

A survey of partial denture design in general dental practice

Basker

Davenport

1978

“…According to the studies of Christidou, Osborne & Chamberlain (1973) and Igarashi (1982), the directions of the abutment movements of free-end RPD are related to the mesiodistal inclination contour of the edentulous residual ridge. On the flat form ridge the terminal abutment displaced distally, on the distal ascending inclined ridge the terminal abutment displaced mesially.…”

Section: Discussionmentioning

confidence: 99%

Stress distribution and abutment tooth mobility of distal‐extension removable partial dentures with different retainers: an in vivo study

Igarashi

Ogata

Kuroiwa

et al. 1999

Three types of retainers (wrought wire clasp, Aker's cast clasp, and conical crown telescopic retainer) designed for distal-extension removable partial dentures (RPDs) were assessed in two Kennedy class I patients' mouths. The assessment, included the ratio of denture base shearing load and mobility of the terminal abutments when loaded on a free-end RPD occlusal surface. The mean values of denture base shearing ratios of wrought wire clasp, Aker's clasp and conical crown telescope were 60, 42 and 20%, respectively. The abutment mobility of the three types of retainers were all within the 'mobile ability area' except the wrought wire clasp for patient A's right side. The greatest tooth mobility was observed with the wrought wire clasps, followed by Aker's clasp and the conical crown telescopic retainer. From the analysis the following was concluded: (i) different retainers do influence the occlusal load distribution; (ii) the occlusal load distributed to the free-end saddle is closely related to the connecting rigidity of the retainer; (iii) mucosal support has an indispensable role in sharing the occlusal load with various retainers, even the rigid telescopic retainer.

“…The effect of inclination of the residual ridge Hekneby (1967), Cecconi et al (1971Cecconi et al ( , 1972 and Christadou, Osborne & Chamberlain (1973) using both in vitro and in vivo experiments found that the slope of the edentulous ridge upwards towards the ramus affects the direction of abutment tooth movement. Christadou hypothesized that when a vertical force was apphed to a saddle, the area of the ridge under the saddle which sloped towards the ramus resisted this force.…”

Section: Analysis and Discussionmentioning

confidence: 99%

The effect of variation of residual ridge angle on partial denture abutment tooth movement

Feingold

Grant

Johnson

1988

Using a laboratory model simulating a free-end saddle partial denture situation, the effect of variation of the angulation of the crest of the residual alveolar ridge to the horizontal on movement of the abutment tooth and saddle was observed. It was found that the inclination of the residual ridge affected the direction and magnitude of abutment tooth movement. The direction of abutment tooth movement was not related to the position of the occlusal rest. However, the magnitude of saddle and abutment tooth movement is affected by the design of the clasp used.