prosthetic | TECHNIQUES

Pretreatment

After anatomic impressions of the upper and lower jaw, models were fabricated on which individual trays were created for the mucodynamic impression.

Master models were manufactered to be able to produce fitting bite registration plates with a wax rim to record the position of the mandible in relation to the maxilla and to transfer the midline, the canine position, the incisal length and expansion of the buccal corridor. According to the clinical bite registration, the two master models were articulated and the model analysis was performed.

Set up

VITA MFT Anterior was used for the set up in the anterior area. For a budget denture tooth, the anterior sets are very aesthetic. They are designed naturally in morphology and texture. The anatomical structure is simulated with neck, dentine and enamel layers, which leads to a three-dimensional play of light and colour. Tooth axis and coordinated angle characteristics, according to the aesthetic rules, make a quick match of the front teeth possible. Due to the position of the remaning canine and incisor, all lower teeth were used in addition to the natural incisor 32 to provide stability while eating with the new denture. So altogether, there were five lower central incisors established. The set up was performed edge-to-edge to the remaining natural teeth to improve the aesthetics of the upper smile line.

In the molar region, the lingualized VITA MFT Posterior easily enabled finding the centric position and establishing buccal contacts, due to the multifunctional occlusal surface design. The lingualisation of the teeth offered more space for the tongue and a more stable function on the atrophied jaw ridges. Extra care was also taken during the contouring of the lower lingual aspect to implement space and free movement of the tongue. During the try in, a final bite registration was taken with the set ups in order to recheck static and dynamic occlusion in the articulator.

Polymer transfer and outcome

After a successful clinical try in and final anatomical contouring, the prosthetics were transferred into polymer. First, the set ups were duplicated with hydrocolloid. Then the teeth were cleaned, conditioned and repositioned in the hydrocolloid index. Before the flasking of the denture base with the autopolymerizsing and pourable Castdon Resin (Dreve Dentamid, Germany), internal colours of the DentureArt System (Dreve Dentamid, Germany) were applied into the flask to simulate the appearance of the gingival anatomy. After the polymerisation, finishing and polishing was performed. The new rehabilitations were inserted intraorally and checked by the practitioner and the patient. Both were very satisfied with the lifelike appearance and functional integration. The patient’s requirements of an economical, aesthetic and functional rehabilitation were all met.

Daniel qualified as a Dental Technician in Paris and then achieved qualifications in denturism with the Ontario College Advanced Diploma for the Denturist. He was awarded his UK Diploma qualification in Clinical Dental Technology via the Royal College of Surgeons of England.