Effect of different denture base materials and changed mouth temperature on dimensional stability of complete dentures

• Register: ISRCTN
• Last refreshed on: 17 October 2016
• Main ID: ISRCTN94238244
• Date of registration: 10/12/2015
• Prospective Registration: No
• Primary sponsor: Albaha University (Saudi Arabia)
• Public title: Effect of different denture base materials and changed mouth temperature on dimensional stability of complete dentures
• Scientific title: Effect of different denture base materials and changed mouth temperature on dimensional stability of complete dentures: a quasi-experimental parallel-design study
• Date of first enrolment: 01/12/2014
• Target sample size: 90
• Recruitment status: Completed
• URL: http://isrctn.com/ISRCTN94238244
• Study type: Interventional
• Study design: Quasi-experimental parallel-design study (Treatment)

Countries of recruitment

Egypt

Contacts

• Name: Khalid Arafa

Key inclusion & exclusion criteria

Inclusion criteria: 1. Males aged 60 or above
2. Completely edentulous
3. Wearing upper and lower dentures
Exclusion criteria: 1. Female patients
2. Under age 60
3. Partially edentulous
4. Patients with systemic disease
5. Well developed ridge

Age minimum:
Age maximum:
Gender: Male

Health Condition(s) or Problem(s) studied

Dentures
Not Applicable

Intervention(s)

The three groups received complete dentures fabricated by one of the following base materials (heat cure acrylic resin, soft cure acrylic resin, cobalt chrome metallic).

The first group received complete denture fabricated by heat cure acrylic resin (Meliodent-Bayer dental, Germany batch no 54105L-2) curing cycles in acrylic furnace, at 165°F for 9 (acrylic furnace Bego sommer, Germany batch 226-433). The second group received complete denture fabricated by soft cure acrylic resin (vertex thermo sense rigid batch noxu373802 USA). The third group received complete denture fabricated by cobalt chrome metallic denture base (Bego metal denture base Germany batch 233-42), using the burnout furnace controlled electronically at (950-1200)c fasting furnace (bego Germany batch 239270).

For all the patients, the primary impression was taken by alginate then taking the second impression by rubber base (coltene swiss quality for dentistry batch 4160). In the third visit the jaw relationship was taken, in the fourth visit a try in the waxed denture (Cavex, Holland batch Z.A 990.01) was done, followed by fabrication of the denture in the dental lab. During the denture fabrication two different points were prepared in the fitting surface of the waxed denture (first point in the incisive papilla, second point in mid line of the post dam). After the procedures were finished the point shack in the fitting surface measurement by dial caliper step measurement.

Primary Outcome(s)

Demographic data and denture dimensions. All groups with complete dentures were evaluated after 4 months, 8 months and lastly after 12 months, and evaluated at normal patient mouth temperature, after drinking hot tea at 45c, and after drinking a cold drink at 5c.

Secondary Outcome(s)

The accuracy of denture dimensions measurement. All groups with complete dentures were evaluated after 4 months, 8 months and lastly after 12 months, and evaluated at normal patient mouth temperature, after drinking hot tea at 45c, and after drinking a cold drink at 5c.

Secondary ID(s)

N/A

Source(s) of Monetary Support

Albaha University (Saudi Arabia)