Reproducibility of the Obtained Centric Relation Records in Patients with Disc Displacement with Reduction

Abstract

ObjectiveThe aim of this study was to investigate reproducibility of the position of centric relation in patients with disc displacement with reduction.Materials and methodsThe test group included 30 subjects, diagnosed with disc displacement with reduction in right, left or both joints. The control group included 12 individuals with no signs and symptoms of temporomandibular disorders. Using chin point guidance with a jig, centric relation record was made three times by every participant, in a single session. Left and right condylar position for each centric relation record was determined and recorded using the electronic ultrasonic measuring device. The data were transferred to the computer, processed and analyzed. Condylar distances between centric relation records were measured (anteroposterior, vertical, transversal and linear values), and the data were statistically analyzed using the t and the F tests.ResultsNo statically significant difference was found between the test and the control groups. Two thirds of study participants demonstrated condylar position of the repeated centric relation recording within the area of 0.3 mm in diameter. For more than 90% of participants that area was within 0.4 mm.ConclusionsThere is no difference in reproducibility of the centric relation between patients with disc displacement with reduction and healthy temporomandibular joint individuals (p>0.05). When doing centric relation record on a patient with disc displacement with reduction there is no need for previous splint therapy and standard precautions are acceptable. The obtained results must be interpreted within the experimental group, and not projected on the other groups of temporomandibular disorders.

A clinical comparative study to assess the efficacy of a new centric registration technique with a conventional technique

“…Lin and Wagner[ 31 ] described an efficient and a feasible technique to construct an intraoral central bearing tracing device which can be used to make CR records, to determine vertical dimension of occlusion, and to detect occlusal interferences. Čimić et al [ 32 ] compared the reproducibility of CR records fabricated with chin point guidance with jig in patients with disc displacement with reduction and healthy individuals and found that there was no difference in the reproducibility of CR records. With the fact that fabricating a conventional complete denture requires several clinical appointments and laboratory procedures, Infante et al [ 33 ] presented a case of complete denture fabrication using computer-aided design/computer-aided manufacturing technology eliminating the use of casts, flasking, and processing techniques.…”

Evaluation of Sella Turcica Variations in Lateral Cephalometric Radiographs and its Association with Malocclusion

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