Presentation on theme: "Dr. Abdulaziz Nasser Maher Isolation Instrument. Environment of the Dental Operatory Microbial exposures in the dental operatory involve : 1. Airborne."— Presentation transcript:
Dr. Abdulaziz Nasser Maher Isolation Instrument
Environment of the Dental Operatory Microbial exposures in the dental operatory involve : 1. Airborne contamination. 2. Digital contamination of surfaces. (i.e., hands soiled with saliva that repeatedly contact operatory equipment and surfaces and return to the patient's mouth during treatments).
Environment of the Dental Operatory Airborne Contamination High-speed handpiece : Create airborne contaminants from : Bacterial residents in the dental unit water spray system. Microbial contaminants from saliva, tissues, blood, plaque, and fine debris cut from carious teeth. Airborne contaminants exist in the form of spatter, mists, and aerosols. Aerosols Invisible particles ranging from um that can remain suspended in the air and breathed for hours.
Environment of the Dental Operatory Mists Become visible in a beam of light, Consist of droplets estimated to approach or exceed 50 um. Heavy mists tend to gradually settle from the air after minutes. Both aerosols and mists produced by the cough of patient with unrecognized active pulmonary or pharyngeal tuberculosis ( TB ) are very likely to transmit the infection.
Environment of the Dental Operatory Spatter Consists of particles generally larger than 50 um and are even visible splashes. Spatter has a distinct trajectory, usually falling within 3 feet of the patient's mouth. Spatter or splashing of mucosa is considered a potential route of infection for dental personnel by blood borne pathogens.
Isolation Instrument complete and partial isolation 1.Rubber Dam equipment (punch, forceps, holder & clamps ). 2.Saliva ejector. 3.Cotton roll holder.
Rubber Dam Advantages Dry clean operating field Better access and visibility Protection of Patient and Operator Increased operating efficiency Improves the properties of dental materials indirectly. Disadvantages Time consumption Objectionable to some patients
Rubber dam punch Functions Used to make holes of different sizes in the RD sheet. Punch stylus pierces a hole in the rubber dam sheet. Anisworth Design (Hygenic) Ivory Design
Rubber Dam sheet MATERIAL Sizes : 5 X 5 inch and 6 X 6 inch sheets. Available in 5 different thickness : Thin 0.15 mm (0.006 inch) Medium 0.20 mm (0.008 inch) Heavy 0.25 mm ( inch) Extra Heavy 0.30 mm (0.012 inch) Special Heavy 0.35 mm (0.014 inch) The rubber dam has shiny and dull side.
Rubber Dam frame and clamp Rubber dam holder ( frame) is used to secure the borders of RD in stretched condition. Young´s rubber dam holder is U shaped metal frame with small projections to hold the dam. Rubber dam retainer or clamp Used to anchor the rubber dam to the most posterior tooth to be isolated. It consists of 4 prongs and 2 jaws connected by a bow. Prongs make four point contact with the tooth.
Rubber dam retainer or clamp RetainerAppropriate TeethRetainerAppropriate Teeth W56 most molars W4 most premolars W7 mandibular molars W2 small premolars W8 maxillary molars W- wingless W8A maxillary molars - A active W27 distal extension-mandibular molars - D distal extension Hyg B-6 anterior teeth
Rubber dam retainer or clamp
Rubber dam clamp forceps Functions and features 1.Used to place and remove rubber dam clamps on and from a tooth Work with a spring action when handles are squeezed together 2. Beaks fit into the holes of the rubber dam clamp for secure placement 3. Sliding ring allows forceps to lock when placing the clamp and to be released when removing the clamp 4. Handle shaped to allow a firm palm-grasp by the operator Ivory Design Stoke type
Rubber Dam Unfavorable Conditions for Dam Placement Insufficiently erupted teeth Some third molars Extremely malpositioned teeth Asthmatic patients Latex allergy
partial isolation Cotton roll holder
Saliva ejector used for both complete and partial isolation