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الرتبة : ادارة الموقع عدد المساهمات : 1203 Level : 2104 Like : 5 تاريخ الميلاد : 29/05/1988 تاريخ التسجيل : 20/12/2010 العمر : 36
المزاج : مزاج طبيب أسنان ممارس
![List of factors resulting in looseness of dentures Empty](https://2img.net/i/empty.gif) | موضوع: List of factors resulting in looseness of dentures 26/02/12, 11:04 pm | |
| List of factors resulting in looseness of dentures 1 Denture borders Over-extension in depth Slow rise of lower denture when mouth half open, line of inflammation at reflection of sulcal tissues; ulceration in sulcal region. Deep post dam on upper base may cause pain, ulceration
Cause: If buccal to tuberosities, denture displaces on mouth opening, or cheek soreness occurs. Thickened lingual flange enables tongue to lift denture; thick upper and lower labial flanges may produce displacement during muscle activity
Treatment: Slightly under-extend denture flange and accurately mould softened tracing compound. Check borders of record rims and trial dentures at the appropriate stages. Deep post dam to be cautiously reduced and denture worn sparingly until inflammation clears
2 Overextension in width Cheeks appear plumped out. In lower, the buccal flange may be palpated lateral to external oblique ridge
Cause: Design error
Treatment: Reduce over-extension. Use disclosing material to determine what is excessive
3 Poor fit to supporting tissue Recoil of displaced tissue lifts denture
Cause: Poor/inappropriate impression technique especially in posterior lingual pouch area
Treatment: Reline if all other design parameters satisfactory, otherwise remake. Ensure denture is removed from mouth 90 mins prior to impression
4 Denture not in optimal space
Cause: Molars on lower denture lingual to ridge, optimum triangular shape of dentures absent Posterior occlusal table too broad, causing tongue trapping Thick lingual flanges encroaching on tongue space, causing lifting. Excess lip pressure to lower anterior aspect - teeth anterior to ridge, thick periphery Excess pressure from upper lip to upper denture arising from teeth too labially sited to acute naso-labial angle; or failure to adequately seat denture during relining impression procedure
Treatment: Remove lingual cusps and lingual surface from relevant area, repolish. If triangular form not restored, reset teeth or remake dentures Narrow posterior teeth and/or remove most distal teeth from dentures. Reshape lingual polished surface Thin lower labial flange, ensure optimal extension to retromolar pads to resist displacement, reset anterior teeth if necessary Usually requires remaking denture
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