Download Complete Dental Prosthetics by Raymond Nagle and Victor Sears PDF
By Raymond Nagle and Victor Sears
Dental, Dentures, clinical
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Extra resources for Complete Dental Prosthetics
This can simplified to: p = 2T/h Where p = the reduction in pressure, T = the surface tension of saliva, and h = the distance between the denture and its supporting tissues. Although of interest, the effect of surface tension is of less certain significance. Except when speaking the mouth does not contain enough air for a continuous meniscus to form around the denture and at essential times, such as when drinking and eating, it will tend to be disrupted The effect of retention is to maintain a denture in position under the influence of forces tending to displace it at right angles to the denture-bearing area.
For example, to achieve the appearance that a patient desires might involve positioning the teeth outside the neutral zone, so compromising security. Alternatively, the base extension which provides optimum security may involve interference with muscle function and cause pain. We can only try to recognise any likely incompatibility between our ability and the patient’s expectations before we start treatment and take steps to inform the patient of the necessary compromises before completion. Again communication skills are at a premium in explaining this dilemma.
Patients who complain of a lack of saliva (hyposalivation) also complain of poor retention of their complete dentures – although this may be of less consequence to them that the discomfort which results from the lack of lubrication.