A Study to Check Correlation between Panoramic Radiographic Image and Protrusive Inter-Occlusal Record in Male and Female Dentulous Patients for Depicting Condylar Guidance Angle: A Pilot Study

Abstract

Purpose: To study and compare the sagittal condylar angles set on a Hanau articulator using intra-oral protrusive records to angles found using a panoramic radiographic image in male and female dentulous patients. Materials and Methods: A total of 20 subjects (10 male and 10 female) Aged between 21 to 30 years, free of signs and symptoms of temporomandibular joint disorders and with intact dentition were selected. Impressions were made using irreversible hydrocolloid and all dental stone casts (type-III), were mounted on a Hanau articulator using a spring bow type of face bow. For all patients, the protrusive records were made with polyether bite registration paste when the mandible was moved forward by approximately 4-6 mm, using compound jig. All procedures for Original Research Article

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

“…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.…”

“…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]11,13,14,19,20,[22][23][24]26,28,29,31,33,35,36,41,43 The ethical approval was obtained in 25 studies 1,9,11,13,14,[19][20][21][22][23][24][25][26][30]…”

“…[7][8][9]11,13,14,19,20,[22][23][24]26,28,29,31,33,35,36,41,43 The ethical approval was obtained in 25 studies 1,9,11,13,14,[19][20][21][22][23][24][25][26][30][31][32][33][34][35][36]38,[40][41][42][43] while informed consent was obtained in only 20 studies. 8,9,11,[20][21][22][23][...…”

“…The brands and the models of the articulator, OPG, CBCT, CT scan, LC and TMJ tomogram varied according to the studies. Radiographically the HCG angle was measured using OPG 1,7-9,14, [19][20][21][22][23][26][27][28][30][31][32][34][35][36][37][38][39][40]42 in 24 studies, seven studies recorded HCG angle with CBCT, 8,11,25,31,33,35,43 five studies used LC 1,23,24,29,41 and one study each recorded HCG angle with CT scan 13 and TMJ tomogram. 44 For all of the included studies, the orientation jaw relation was registered utilising face-bow and was transferred on to the semi-adjustable articulator employing mounting jig or extra oral gothic arch tracers, and the protrusive interocclusal record was obtained by instructing the subject to protrude the mandible forward by 6mm.…”

“…The condylar guidance angle was measured between the Frankfort's horizontal plane and the line formed along the posterior slope of articular eminence (AE), connecting the most concave (highest) point on the glenoid fossa and the most convex (lowest) point on the apical portion of AE in all the included studies. The right and left HCG angle was calculated separately for both the dentate and edentulous patients in all the included studies except for studies Amin et al, 20 Jerath S et al, 25 Katiyar et al 26 and Paul et al 1 cumulative value of right and left angle is mentioned.…”