Aim: The aim of the study was to assess the total occlusal convergence guessing by sight and ruler methods and compare with the snapshots for accuracy.
Materials and methods: The methods used for total occlusal convergence (TOC) preparation were assessed among students, interns, and dental specialists after die preparation and compared with the snapshots for accuracy.
Results: In all, 47% of the specialist’s observation achieved the recommended TOC angle, while 29.25% was obtained by undergraduates.
Conclusion: In conclusion, specialist’s observation was better in both ruler and sight guessing methods compared to dental students and interns.
Clinical significance: The abutment for dental prosthesis should have a minimal TOC, also called a taper, for adequate retention of the abutment.
Shillingburg HT, Hobo S, Whitsett LD, et al. Fundamentals of fixed prosthodontics. 3rd ed., Chi-cago: Quintessence; 1997.
Al-Moaleem M, Almakhloti E, Porwal A, et al. Evaluation of the degree of taper and convergence angle of full ceramo-metal crown preparations by different specialists centers at Assir region, Saudi Arabia. Saudi J Med Med Sci 2015;3(3):198–203. DOI: 10.4103/1658-631X.161996.
Ghafoor R, Rahman M, Siddiqui A. Assessment of convergence angle of full-coverage porcelain fused to metal crowns in clinical practice. Indian J Dent Res 2012;23(2):241–246. DOI: 10.4103/0970-9290.100434.
Sato T, AlMutawaa N, Okada D, et al. A clinical study on abutment taper and height of full cast crown preparations. J Med Dent Sci 1998;45(3):205–210.
Aleisa K, AlDwairi Z, AlWazzan K, et al. Convergence angles of clinical tooth preparations achieved by dental students at King Saud University, Saudi Arabia. J Dent Educ 2012;77(9):1154–1158.
Ayad MF, Maghrabi AA, Rosenstiel SF. Assessment of convergence angles of tooth preparations for complete crowns among dental students. J Dent 2005;33(8):633–638. DOI: 10.1016/j.jdent.2004.12.008.
Dorriz H, Nokar S, Baghai Naini R, et al. The convergence angle of full-coverage crown preparations made by dental students. J Dent Tehran Uni Med Sci 2007;5(1):37–41.
Patel BP, Wildgoose GD, Winstanley BR. Comparison of convergence angles achieved in posterior teeth prepared for full veneer crowns. Eur J Prosthod Rest Dent 2005;13(2):100–104.
Goodacre CJ, Campagni WV, Aquilino SA. Tooth preparations for complete crowns: an art form based on scientific principles. J Prosthet Dent 2001;85(4):363–376. DOI: 10.1067/mpr.2001.114685.
Marghalani TY. Convergence angles of metal ceramic crowns prepared by dental students. J Prosthet Dent 2014;112(5):1250–1256. DOI: 10.1016/j.prosdent.2014.03.024.
AlAli K, AlWazzan K, AlAmri M, et al. Assessment of convergence angle of full veneer preparations carried out by practitioners with different levels of experience. Saudi Dent J 2009;21(1):37–44.
Kirov D, Kazakova S, Krastev D. Convergence angle of prepared Typodont teeth for full veneer crowns achieved by dental students. Int J Sci Res 2014;3:401–403.
Ghasemi S, Mireskandari P, Ghanizdah M, et al. Comparison of the convergence angle in full-crown abutment teeth prepared by the preclinical and senior students in Faculty of Dentistry Tabriz University. World J Dent 2017;8(2):77–80. DOI: 10.5005/jp-journals-10015-1416.
Makker R, Choukse V, Upadhyay M, et al. Assesment and comparison of convergence angle of tooth preparations for full-veneer crowns among practitioners with different levels of experience. Int J Prevent Clin Dent Res 2014;1(1):7–10.
Narula S, Punia V, Khandelwal M, et al. Retention in conventional fixed partial dentures: a review. J Clin Diagnos Res 2011;5(5):1128–1133.
Jayna M, Jayna A, Yadav B, et al. Clinical insight into tooth preparation: an update. Saint Int Dent J 2015;1(1):2–7. DOI: 10.4103/2454-3160.161793.
Sharma A, Rahul GR, Poduval ST, et al. Short clinical crowns (SCC) – treatment considerations and techniques. J Clin Exp Dent 2012;4(4):e230–e236. DOI: 10.4317/jced.50556.
Rafeek RN, Smith WAJ, Seymour KG, et al. Samarawickrama, taper of full-veneer crown preparations by dental students at the University of the West Indies. Int J Prosthodont 2010;19(7):580–585. DOI: 10.1111/j.1532-849X.2010.00625.x.
El-Mubarak N, Abu-Bakr N, Omer O, et al. Assessment of undergraduate students’ tooth preparation for full veneer cast restorations. Open Journal of Stomatology 2014;4(02):43–48. DOI: 10.4236/ojst.2014.42008.