Clinical application research of cobalt-chromium-molybdenum alloy
Publish Time:
2020-09-26
Cobalt-chromium-molybdenum alloy increases the content of chromium and molybdenum, and has higher Vickers hardness and ductility coefficient. Clasps designed with cobalt-chromium-molybdenum alloy can be made smaller than traditional cobalt-chromium alloy while ensuring sufficient strength and greater elasticity, thus meeting aesthetic requirements, and the design of the denture base is also more flexible. The elastic modulus of cobalt-chromium-molybdenum framework alloy
Both modulus and tensile strength are superior, which is conducive to stress conduction, dispersing occlusal force, and effectively reducing the pressure and torque on abutment teeth and supporting tissues. It not only protects the abutment teeth but also avoids abnormal absorption of the alveolar ridge in the edentulous area caused by uneven force. BPD Perfect Framework is a new high cobalt-chromium-molybdenum alloy framework system used for casting removable frameworks. The Wironit alloy used does not contain beryllium or nickel, has no potential allergic reactions, and has excellent corrosion resistance. Due to the addition of molybdenum (about 5%), the alloy material has relatively good elasticity and toughness, thus possessing good fatigue resistance. This makes Wironit alloy particularly suitable for split-base denture designs. Professor Knapp once proposed the "split" design concept (i.e., fissure) at the base when designing partial dentures, which means adopting a split framework
design to change the stress distribution of traditional dentures. When using Wironit alloy for stress-interrupted framework design, the abutment teeth only bear the vertical force transmitted by the mesial rest, without other torque, thus protecting the abutment teeth; at the same time, due to the presence of the fracture fissure, the occlusal force borne by the artificial teeth is basically vertically downward and not directly transmitted to the abutment teeth; the selected material also has a certain hardness, is not easily deformed or fractured, and has a certain resilience, so the force received by the alveolar ridge in the edentulous area is also basically uniform and vertical, thus effectively protecting the abutment teeth and their supporting tissues. In addition, the excellent properties of this material can significantly improve the aesthetics and comfort of clasps and denture bases, and changes in the framework's shape and performance make the denture have less impact on functions such as speech. In summary, the restorative effect is satisfactory, and patient satisfaction is very high
During the observation period of this study, patients wearing cobalt-chromium-molybdenum alloy stress-interrupted framework dentures showed significantly better aesthetics, comfort, and linguistic function compared to cobalt-chromium alloy framework dentures; their chewing function, retention function, and impact on terminal abutment teeth had a slight advantage over cobalt-chromium alloy framework dentures, but due to the limited observation time of this study and the fact that the control group's framework design also adopted the traditional RPA stress-interrupted clasp design, there was no significant statistical difference. In summary, its clinical restorative effect is significantly superior to traditional cobalt-chromium alloy frameworks, and the long-term effects and impact on abutment teeth and supporting tissues require further research and observation. The difficulty of this study lies in the need to adjust denture design in a timely manner according to the specific oral conditions, such as: the condition of the abutment teeth, alveolar ridge, and mucosa, etc. Proper selection of indications and reasonable design can also improve the denture restoration effect. In conclusion, cobalt-chromium-molybdenum alloy has incomparable advantages over other metals, but its high cost makes it difficult for patients to accept, and currently, it is only accepted by a portion of patients as a high-end denture
With the development of socio-economic conditions, the improvement of people's living standards, and the increasing awareness of cobalt-chromium-molybdenum alloy, it is believed that more and more people will accept and choose cobalt-chromium-molybdenum alloy stress-interrupted framework dentures
keyword： Cobalt-chromium-molybdenum alloy,Kito
Related News
English ASTM Standard Catalog: 1. ASTM B348-06a Titanium and titanium alloy bars and billets; 2. ASTM B381-06a Titanium and titanium alloy forgings; 3. ASTM B861-06a Titanium and titanium alloy seamless tubes
Grade, composition, properties and applications of titanium and titanium alloys
This standard is issued under the fixed designation B 348; the number immediately following the designation indicates
Seamless and welded titanium and titanium alloy tubes for condensers and heat exchangers¹
GBT 13810-2007 Titanium and titanium alloys for surgical implants
Titanium and titanium alloy processed materials for surgical implants
Contact Us
No. South Section, Taicheng Road, Weibing District, Baoji City, Shaanxi Province
Social Media Sharing
Online Message
Copyright ©Shaanxi China Titanium New Materials Co.,Ltd. All rights reserved.