A study on the accuracy of horizontal condylar guidance values in edentulous patients using preprosthetic diagnostic radiographs

Abstract

HCG can be successfully determined in edentulous participants by using three aforementioned methods. HCG values from cephalometric tracing of diagnostic radiographs can be used as an adjunct to the clinical method but cannot be used independently for programming a semi-adjustable articulator.

Accuracy of radiographic and protrusive occlusal record methods in determining condylar guidance angles: a systematic review and meta-analysis

“…The general characteristics of 33 studies 1,[7][8][9]11,13,14, are summarized in Table 2. All included studies were unicentric trials published between 2011 and 2020.…”

“…Typically, 26 studies were conducted in India, 1,7,11,13,14,19,20,[23][24][25][26][27]29,30,32,[34][35][36][37][38][39][40][41][42][43][44] two each in Iran 8,28 and Saudi Arabia 22,33 and one each in Nepal, 21 Korea 31 and Poland. 9 In total, 20 studies included were conducted among dentate patients having a total sample size of 595 and age ranged from 18-43 years 1,19,20,21,25,27,30,32,34,[37][38][39][40]42,44 while 15 studies included were conducted among edentulous patients having a total sample size of 277 and age ranged from 35-75 years. [7][8][9]11,…”

“…7 Even semi-adjustable articulator setup with interocclusal records has a limited degree of repeatability and is susceptible to instrument, operator, and interocclusal record material factors. 1 Radiographs can indeed show the shape of the articular eminence and the glenoid fossa of the temporal bone. 8 Magnetic resonance imaging (MRI), cone-beam computed tomography (CBCT), computed tomography (CT), panoramic radiograph (OPG), and lateral cephalogram (LC) are currently accessible to visualise temporomandibular joint components.…”

“…The inclination of the condylar trail, which is one of the five aspects of balanced occlusion, is therefore a crucial factor in prosthetic treatment success. 1,2 This is the only aspect that is not under the control of a prosthodontist and should be reproduced precisely. Condylar guidance (CG) is described by the Glossary of Prosthodontic Terms 9 as mandibular guidance created by the condyle and articular disc crossing the shape of the articular eminence (AE).…”

“…5,6 Numerous strategies, such as interocclusal records, pantographic tracings, electronic jaw tracking devices, radiographic methods, and so on, can be used to determine horizontal condylar inclination, but programming a semi-adjustable articulator with a protrusive interocclusal record after training the patient to trace a gothic arch is still the most commonly used method in clinical practice. 1 The accuracy of Gothic arch recording is influenced by factors such as the patient's neuromuscular control, the stability of the record base, and the recording media. Additionally, when the patient moves the jaw laterally during protrusion, the registration of the condylar route alters.…”