EFFECT OF POST DAM TECHNIQUES AND MATERIALS ON THE RETENTION OF COMPLETE DENTURE BASES
Heba Mohammad Ahmed;
Abstract
The present study was done to compare between the retention of upper complete heat cured acrylic resin denture bases and modified denture bases with self cured thermo elastic acrylic resin (Versacryl) post dam.
Ten completely edentulous patients were selected tor the study with ages ranging from forty to sixty years.
They were all having normal maxilla- mandibular ridge relation and shape, free of any pathological lesions in the oral cavity, U-shaped palatal vault, with no temporomandibular joint disorders or any facial muscular in coordination and free from systemic diseases.
The maxillary ridges of all the selected patients were devoid of undercuts to avoid the mechanical factor.
Ten complete upper and lower acrylic dentures were constructed for the ten patients. After
• processing, finishing and polishing of the upper permanent denture bases, metallic hook was fixed at the geometrical center of each one.
• The retention of each denture base was tested to determine the force required to dislodge it from basal seat in the patient's mouth using a force meter gauge.
The first measurement of retention was taken at insertion then after month and after two months. The upper acrylic dentures were taken from the patients tor a month to allow settling of tissues while developing modification of post dam using versacryl.
Measuring retention of modified versacryl post dam dentures was done with the same previous method as in acrylic ones and for the same follow up period.
It was found that at insertion the retention of conventional acrylic denture was higher than that of versacryl one.
At the end of the follow up period which was three months, the retention of conventional acrylic dentures decreased by time while versacryl retention increased by time.
The means of dislodging forces were calculated, tabulated and statistically analyzed.
Ten completely edentulous patients were selected tor the study with ages ranging from forty to sixty years.
They were all having normal maxilla- mandibular ridge relation and shape, free of any pathological lesions in the oral cavity, U-shaped palatal vault, with no temporomandibular joint disorders or any facial muscular in coordination and free from systemic diseases.
The maxillary ridges of all the selected patients were devoid of undercuts to avoid the mechanical factor.
Ten complete upper and lower acrylic dentures were constructed for the ten patients. After
• processing, finishing and polishing of the upper permanent denture bases, metallic hook was fixed at the geometrical center of each one.
• The retention of each denture base was tested to determine the force required to dislodge it from basal seat in the patient's mouth using a force meter gauge.
The first measurement of retention was taken at insertion then after month and after two months. The upper acrylic dentures were taken from the patients tor a month to allow settling of tissues while developing modification of post dam using versacryl.
Measuring retention of modified versacryl post dam dentures was done with the same previous method as in acrylic ones and for the same follow up period.
It was found that at insertion the retention of conventional acrylic denture was higher than that of versacryl one.
At the end of the follow up period which was three months, the retention of conventional acrylic dentures decreased by time while versacryl retention increased by time.
The means of dislodging forces were calculated, tabulated and statistically analyzed.
Other data
| Title | EFFECT OF POST DAM TECHNIQUES AND MATERIALS ON THE RETENTION OF COMPLETE DENTURE BASES | Other Titles | دراسة تأثير طرق مختلفة لعمل الحافظة الخلفية والمواد على ثبات الطقم الكامل | Authors | Heba Mohammad Ahmed | Issue Date | 2011 |
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