Comparative Evaluation of Masticatory Efficiency of Implant Supported Overdenture
Condition: Mastication Disorder; Mandibular Dysfunction
MeSH terms: Temporomandibular Joint Disorders; Temporomandibular Joint Dysfunction Syndrome
Study type: Interventional

Summary: 
      the goal of this clinical trial To evaluate the effects of different base materials of
      mandibular implant supported overdenture with bar/clip attachment on masticatory efficacy.

      Twenty-four edentulous patients were selected to place two inter-foraminal mandibular
      implants with custom-made cast bar to retain overdentures made from two different base
      material and divided into two groups.

      The masticatory efficiency were tested using three different food categories (carrots,
      bananas, and apples) and measured by four parameters.
    

Detailed description: 
      Based on inclusion and exclusion standards for implant selection, a twenty-four completely
      edentulous medically fit male patient aged 50-70 years were selected from the removable
      prosthodontics clinical, Faculty of Dental Medicine. The patient selection was determined
      through oral and dental examination, which revealed class I arch relationship with adequate
      20-25MM inter-arch space and free from any oral hard or soft tissue abnormality that can
      interfere with the treatment. The selection was excluded all patients who do not satisfy
      these normal criteria. Written consent was obtained from each patients, detailing all
      surgical and prosthetic steps as well as the treatment's advantages and disadvantages.

      To obtain precise measurements of bone height and width at the implant site and accurately
      determine the size and type of the required implants, Cone Beam Computerized Tomography
      (CBCT) was performed, guided with a radiographic stent for each selected patient.

      According to the type of complete denture base material's construction, the twenty-four
      selected patients whose selected to participate in this trial, were grouped into two groups.
      Group I (n =12) patients with a heat polymerized acrylic resin complete mandibular
      overdenture HCG and In Group II (n =12) patients with a thermoplastic (polyamide) complete
      mandibular overdenture TPG, both groups were retained by a bar/clip attachment system.

      The masticatory efficiencies were examined using three different food categories in terms of
      the level of hardness, such as (apples, bananas, and carrots). Patients installed their
      mandibular overdentures while sitting upright. Each participant was then given assurances to
      help them rest and not be disturbed before eating the test food, which was cut into equal
      parts (1cm × 1cm). The following measures were recorded using a stopwatch:

      The Number of chewing cycle strokes up to the first sallow. The Number of chewing cycle
      strokes until the mouth is free of food. The number of swallows until the mouth is free of
      food. Time (in seconds) until the mouth is free of food. The data collected from the test
      groups, and a statistical evaluation conducted using the SPSS software program (IBM Company).
      The average, standard deviation, and lowest and highest values were also calculated for each
      group under consideration. A one-way ANOVA was also used to ascertain whether there were any
      significant differences in the averages of the different groups analyzed. Additionally, the
      Tukey test was used to evaluate whether averages differed significantly from each other at
      the specific probability level (P < 0.05).
    

Intervention name(s): implants with overdentures
Intervention type(s): Device
Intervention description(s): two implants with bar attachment placed in interforaminal of the mandible mandible of the participants, the patients were delivered conventional upper complete denture constructed from heat cured acrylic rein, but in implanted mandibular arch they were received complete overdenture constructed from heat cured acrylic resin for Group I, and complete thermoplastic denture was constructed for Group II.
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Single (Participant)
Primary purpose: Treatment
Keywords: Masticatory efficiency; thermoplastic base material; Bar attachment system