Abstract
Extra coronal cast direct retainers are an essential component of cast removable partial denture prosthesis. The conventional cast circumferential clasp or the bar clasp appear unaesthetic due to visible metal display when used in the smile zone. This article describes two hidden clasp designs as an alternative to the conventional extra coronal cast direct retainer assembly for the distal extension partially edentulous situation. The same is highlighted via two case reports.
Highlights
Evidence based dentistry suggests that the need for restoration of partially edentulous condition is on the rise.[1]
Not every patient presenting with a distal extension partially edentulous situation is a candidate for the ideal treatment modality of implant prosthesis either due to medical or financial limitations.[2]
The need for restoring such cases with cast removable partial denture (RPD) will remain to continue until the stem cell research reaches a stage wherein the entire missing human tooth can be bioengineered in vivo
Summary
Evidence based dentistry suggests that the need for restoration of partially edentulous condition is on the rise.[1]. Case 1 This case incorporates the Mesial Groove Reciprocation (MGR) clasp[4] which is an esthetic extracoronal retainer for the maxillary canine in a distal extension RPD when the canines are used as abutments. Precision attachments or resilient retainer systems may be used, the conventional extra-coronal clasp assembly still remains the most commonly used direct retainer This is because it is less technique sensitive and more versatile to use. 4. Maxillary cast RPD replacing the missing teeth incorporating the MGR clasp on tooth No 23 as shown in Figures 2 (A, b & c). A 35 year old lady with good socio-economic status reported with the chief complaints of compromised esthetics, pain in some of her caries involved upper and lower teeth and difficulty in chewing food.
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