Abstract
Objectives: The aim of this overview is to discuss about ?The various factors and variables involved in complete denture processing that can contribute to tooth displacement in complete dentures. ?The precautions to be taken to minimize it. Materials and methods: A PubMed search was conducted ending in June 2015 using search terms; artificial tooth movement, tooth displacement, complete dentures, processing. Literature search was completed by hand search accessing the references cited in all the selected publications. Results: The literature search yielded 114 papers in PubMed. Twenty five articles were selected and cross references of these articles were checked. All the English language publications which met the defined objectives were included for the overview. Conclusion: From the present overview, we can conclude that the defined processing procedures must be carefully followed by dental clinicians, technicians and students to avoid occlusal errors in complete dentures due to linear and vertical tooth movement. Each step in the processing procedure must be meticulously carried out and the suggested preventive measures can be followed to ensure predictable treatment outcome.
Highlights
Predictable treatment outcomes with complete dentures in edentulous patients involves a complex array of different factors
From the present overview, we can conclude that the defined processing procedures must be carefully followed by dental clinicians, technicians and students to avoid occlusal errors in complete dentures due to linear and vertical tooth movement
Occlusal discrepancies are produced in complete dentures as a result of processing procedures, and these must be corrected before the denture insertion appointment
Summary
Predictable treatment outcomes with complete dentures in edentulous patients involves a complex array of different factors. There are two main factors responsible for occlusal discrepancies in the processed dentures: A) change in the relationship of a tooth / teeth to the master cast during processing as a result of investing procedure, careless packing of acrylic resins in the mold cavity, or improper flask. The combination of polymerization shrinkage, thermal contraction during flask cooling and strain accompanying stress release during deflasking can result in denture base distortion and displacement of artificial teeth [3,4] leading to alterations in occlusal contacts, vertical dimension of occlusion and decrease in stability and retention of dentures [5,6,7]. It can occur due to several other factors such as base thickness [8,9], palatal form [1,10], flask closure [5,11], investing media and procedure [12,13,14,15,16,17,18,19], polymerization techniques [15], flask cooling method [11,20], post-pressing time [5,21], water storage [20,22], monomer-polymer ratio [23] and wax instability [24]
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