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Dental Handpieces and Polishing: A Historical Overview and Functional Analysis, Exams of Dentistry

University of Massachusetts - BostonDentistry

An in-depth exploration of the history and functionality of dental handpieces and their role in various dental procedures. From the myans' use of a form of a dental drill over a thousand years ago to the introduction of electrically powered drills in the late 1800s, this document covers the evolution of dental handpieces and their importance in restorative dentistry. It also discusses the different types of handpieces, their attachments, and their uses in various dental procedures. Additionally, it touches upon the importance of handpiece maintenance and the role of the fda in regulating dental handpieces.

Typology: Exams

2023/2024

Available from 02/15/2024

DrShirleyAurora
DrShirleyAurora 🇺🇸

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Dental Handpieces and Polishing amalgams
Who used a form of a dental drill over a 1,000 years ago? -
The Myans
Mid ___ doctors began to fill holes in teeth with various substances after using a chisel to chip away
damaged enamel? -
1600's
Who is the "father of modern dentistry"? -
Pierre Fauchard--used a dril described in a book in 1746. It had a long meta rod with a bow that
was used to power it.
1778 Mechanical drill powered by a ____? -
Hand crank
1870 electrically ______ were created? -
powered drill ; Time to prepare a cavity went from hours to less than 10 min.
Dental handpieces are the most ____ used devices in restorative dentistry? -
frequently
The most common types are: -
1)low-speed
2) high speed
Dental ___ provide the power to the handpiece, rotating the bur, which completes the actual cutting or
polishing ot tooth structure and castings. -
units
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Dental Handpieces and Polishing amalgams

Who used a form of a dental drill over a 1,000 years ago? - The Myans Mid ___ doctors began to fill holes in teeth with various substances after using a chisel to chip away damaged enamel? - 1600's Who is the "father of modern dentistry"? - Pierre Fauchard--used a dril described in a book in 1746. It had a long meta rod with a bow that was used to power it. 1778 Mechanical drill powered by a ____? - Hand crank 1870 electrically ______ were created? - powered drill ; Time to prepare a cavity went from hours to less than 10 min. Dental handpieces are the most ____ used devices in restorative dentistry? - frequently The most common types are: - 1)low-speed

  1. high speed Dental ___ provide the power to the handpiece, rotating the bur, which completes the actual cutting or polishing ot tooth structure and castings. - units

The - handpiece is often referred to as the straight hand-piece? - Low-speed; 10,000-30,000 rotations per min. (rpm) The bur can be poistioned to operate with a forward or back ward movement. a variety of attatchments (sleeves) are used that fit into the handpiece. The ___attachement is commonly used for lab procedures for trimming removable prostheses outside the mouth? - Straight: slides onto the motor and locks into place. The ___ attachement is designed to allow the operator intraoral access w/easier adaption to the tooth surfaces? - Contra: Slides onto motor and locks into place. Holds latch type rotary inst., endo files, prophy cups, and mandrels. The ___angle is udes during polishing procedures? - Prophy: Most common is the plastic disposable/ single use angle. Screw type angle holds the prophy cup and brush in place by a threaded shaft. A Low-speed is used for removal of __decay and ___finishing of cavity prep. Finishing and polishing restorations. Coronal polish and stain removal? - soft; fine Also: procelain adjustments. Lab: trim and contour temp crowns. Trim and reline removale partials and dentures Trimming and contour of ortho appliances. High-speed drills were developed in __? And introduced in ___? - 1911

  1. reduction in the crown portion of the tooth in crn-bridge preps. 3.prep of outline and retention grooves for new restoration.
  2. sectioning a tooth during surgery. Problems w/handpieces often come form improper __ and ___? - cleaning and lubrication can collect on the internal parts of the handpiece and make it in operable? - Debris lubrication is not good for handpiece? - extreme Some andpieces are avalilable w/ bearings that require no lubrication? - ceramic It is imperiative to follow ___ directions for handpiece maintenance? - manufacturers Some handpieces require before sterilization and some require __ after? - lubrication, lubrication (others require it before and after) what a PIA A dental handpiece is considered a class __ ___ ___ and fall under the review of the FDA? - I medical device. The FDA requiers that each manufacturer intending to sell a class 1 medical devices has to submit a _(): a premarket submission? -

510 (k) (demonstrates the safety and effectiveness of the device in comparison to equivalent devices already approved by the FDA) The FDA requires that each device must be designed to allow complete ____ by an accepted method, and demonstrate continued performance after repeated sterilization? - sterilization. Sterilization requieres the use of ___ monitoring to document external and internal sterility. - biological The center of diseae control use the _____ classification wheich has three catagories: ,,___? - Spaulding, critical, semi critical and non-critical Instruments that penetrate soft tissure, cntact bone, enter or make contact w/ the blood stream are considered ____? - critical (have the greatest risk of transmitting infection) Items that have a lower risk of transmitting disease are considered ___? - semi-critical (dental handpieces are in this catagory) Handpieces were not made to withstand heat of sterilization until the mid ___? - 1990's (Kimberly Bergalis lobbied for for all health care workers to be tested for HIV until she died) Air water syringes and handpieces should be ___ for 20-230 secon after each patient? - flushed Three basic parts of a rotary cutting instrument are the ___, ___, and ___? - Shank: (straight, latch and friction grip)

  1. Finishing: round, tapered and flame shaped.
  2. increased (allows for better polishing) Abrasive discs and wheels require a ___ to attatch the abrasives to the handpiece? - Mandrel (metal shaft) The prupose of amalgam finishing and polishing burs is to contribute to the ___ of the restoration andthe helath of the surrounding periodontium? - longevity: removes marginal irregularities, imporve anatomical contours, remove corrosion and prevent deteriation, smooth rough surface, prevent recurrent decay. How long must you wait until you polish an amalgam? - minimum of 24 hours until the final crystallization has taken place. Corrosion = destructive attachment on the surface and subsurface of the resotration. Smoothing and ___ makes it less likely to accumulate acids, plaque and debris? - polishing (amalgams) (also tarnish) Over contoured surfaces are more likey to ___ and harbor plaque, irritating surrounding tissues? - collect ___contourning makes self cleansing less effective? - Bulky Polishing is a chance to (1) ___ the contour, assist in reducing areas of (2) ___ occlusion? - alter, premature (which can cause sensitivity or eventually fx in opposing tooth. What must we evaluate prior to polishing a restoration? -
  • no visible fx
  • if class II is proximal contact present
  • anatomy can be maintained or improved *margins can be contoured to be flush w/ cavosurface margin. *occlusion can be maintined or improved Do not posihs restorations w/ gross- (1)___, teeth that need extractions or crowns, or if (2) ___ caries are present? -
  1. overhangs
  2. recurrent While polishing do not use too much ___ or speed? - pressure: It can cause friction/ heat and damage pulp. Heat can also bring mercury to the surface- more susceptible to corrosion. Start all rotary inst. prior to (1)___ the surface? Keep inst. (2) ___ over the surface? Use short (3) ____ strokes? -
  3. touching
  4. moving
  5. overlapping (always use secure fulcrum) Steps in polishing: use a white (1)__ or round bur to smooth surface of restoration? A brownie than a (2)___ cup of point ot poish restorations inot a satiny surface. -
  6. stone ( use water with sotnes)
  7. greenie Discs are used for __ or ___ surfaces and interproximal? - buccal, lingual Strips are used ___ to polish the gingival floor and embrasure areas? -