Dentinal surface roughness: A comparison of tooth preparation techniques

AIM: This study aims to evaluate the effect of sterilization and disinfection of rotary diamond burs on their cutting efciency and their relation to their surface roughness. A total of 12 (n=12) burs and acrylic typodont teeth of (n=36) were taken MATERIALS AND METHODS: which consists of Diamond TF-13 (MANI) (n=6) and Tungsten carbide bur 169L bur (Prima Dental, Prima Classic) (n=6). These burs were divided into 6 groups. Each group consists of Sub Groups A & B. Sub Group A in each Group Contains Diamond TF-13 (n=1) and Sub Group B in each group contains Tungsten carbide bur 169L bur (n=1). Each single Group is subjected to different methods of sterilization and disinfection with Autoclave, Hot air oven, Ultrasonic, Glass bead, Chemical Disinfection (KORSOLEX) after the tooth preparation. Samples of crown preparation were prepared by placing the mounted tooth on a Modied Milling Machine. After each use, these diamonds and burs were sterilized for 3 cycles of tooth preparation simultaneously and the tooth were evaluated for the surface roughness with a surface prolometer and the resultant values were noted and statistically analyzed. The burs were evaluated for the surface quality under Stereomicroscope and scores were given from 0 to 5 according to the grits and wear present on the surface of the burs. Diamond rotary burs CLINICAL SIGNIFICANCE: should be sterilized and disinfected as it has become a mandatory protocol for the dental professionals to prevent cross-contamination and cross infection between the dentist and dental personnel. However, different sterilization and disinfection methods can have undesirable effects on the ability of the burs to effectively reduce the tooth structure. Irrespective of the type of bur and sterilization process used, the cutting efciency decreases after multiple usage of the burs.

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Survival of Hybrid Laminate Veneers using two different tooth preparation techniques: Randomized Clinical Trial

Brazilian Dental Journal ◽

10.1590/0103-6440202103907 ◽

2021 ◽

Vol 32 (6) ◽

pp. 36-53

Author(s):

Yara Sayed Attia ◽

Rana Mahmoud Sherif ◽

Hanaa Hassan Zaghloul

Keyword(s):

Clinical Performance ◽

United States Public Health ◽

Study Groups ◽

Resin Cement ◽

Color Match ◽

Traditional Technique ◽

Cad Cam ◽

Tooth Preparation ◽

Laminate Veneers ◽

Preparation Techniques

Abstract The aim of this study was to evaluate the survival of laminate veneers constructed using a recent polymer-infiltrated ceramic network material following the aesthetic pre-evaluative temporary (APT) technique of tooth preparation in comparison to traditional technique. Six patients received 54 laminate veneers. They were divided into two equal groups (n=27) according to the technique of tooth preparation: group T: traditional technique and group A: aesthetic pre-evaluative temporary technique. VITA ENAMIC material was used for CAD/CAM construction of laminate veneers. Cementation was performed using a light cured resin cement. The laminate veneers were evaluated at baseline, after 3, 6 and 12 months according to the modified United States Public Health Service (USPHS) criteriea. The data was collected, tabulated and statistically analyzed. Secondary caries, endodontic complications, cracks and loss of retention were not noted in any laminate veneer. Extensive fractures were not detected in both study groups through the study period. There was a statistically significant decrease of color match criteria between the two groups at the 6 and 12 months recalls. Based on this study, both preparation techniques resulted in successful clinical performance. After 12 months, all the veneers in both groups showed no post-operative sensitivity and all patients were highly satisfied regarding their veneers. However, there was a deterioration in color match criteria through the study period in both study groups.

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Dental amalgam: a practical guide

Dental Update ◽

10.12968/denu.2021.48.8.607 ◽

2021 ◽

Vol 48 (8) ◽

pp. 607-618

Author(s):

Louis Mackenzie

Keyword(s):

Dental Amalgam ◽

Mercury Content ◽

Undergraduate Teaching ◽

Environmental Concerns ◽

Restorative Material ◽

Advantages And Disadvantages ◽

Safety Regulations ◽

The Status ◽

Tooth Preparation ◽

Preparation Techniques

Historically, dental amalgam is the world's most commonly used restorative material. Its use is declining due to patient and professional demand for tooth-coloured restorations that are adhesive and promote minimally invasive tooth preparation techniques. Significant reduction has also resulted from environmental concerns relating to dental amalgam's ~50% mercury content. This paper provides a comprehensive review of the status of dental amalgam including its advantages and disadvantages, amalgam safety, regulations and legislation and a comparison with alternative restorative materials. As the undergraduate teaching of amalgam procedures has progressively declined, this paper also provides an illustrated step-by-step revision guide to the materials, equipment and clinical techniques that will optimize the restoration of challenging, complex cavities, where amalgam is still considered by many to be the material of choice. CPD/Clinical Relevance: Amalgam remains an excellent restorative material for long-lasting restorations in large/complex cavities and where moisture control presents challenges.

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