CHAPTER 9 MISCELLANEOUS OPERATIVE DENTISTRY FACTS AND TRIVIA

Forces created by mastication

molars 125 lbs

bicuspids 50 lbs

incisors 25 lbs

Caridex

   NaOH, NaCl, Aminobutyric acid (NMAB N-monochloro DL-2 aminobutyrate); must have access to lesion

Pulpal effects of Operative Dentistry

Permeability characteristics of dentin

Exposure of 1mm² dentin exposes 30,000 dentinal tubules

Thick dentin is less permeable than thin dentin

Elevation of more than 10 degrees causes destructive changes in the pulp

Coronal dentin much more permeable than radicular dentin

In class 2 preps, axial wall dentin is 2x more permeable than is pulpal floor dentin

Two main theories of dental material toxicity

Material toxicity - Stanley

Bacterial inflammation - Brannstrom        

Most current literature supports Brannstrom.  For example,  Cox did a study on monkeys where different restorative materials were placed at the pulp dentin interface, and histology showed that dental materials do not inherently cause pulpal inflammation, but rather microleakage of bacterial infiltrates).

CEJ

60% cementum covers enamel

            30% butt joint

            10% do not meet

 

Bibliography

Baratz RS:  Journal of Biomaterials Applications 1(3):318-322, Jan 1987.

Baum, Phillips, Lund: Textbook of Operative Dentistry, 1995

Burke FJ, McCaughey AD: The Four Generations of Dentin Bonding.  Am J Dent 8:88-92, 1995.

Caughman WF, Rueggeberg FA, Curtis JW: Clinical Guidelines for Photocuring Restorative Resins.  JADA 126:1280-1286, Sept. 1995.Craig: Restorative Dental Materials, 1997.

CRA.  1997, 1998, 1999.

Internet

Kunzelmann KH*, A. Mehl, R. Hickel (Dept. of Operative Dentistry and Periodontology, University of Munich, GER)  Sliding-wear of an Experimental Ormocer and 15 Commercial Composites.

Leinfelder KF, Osborne JW: Clinical Behaviors of Composite Resins.  J of Biomat Appl 1:327-335, Jan 1987.

Leinfelder KF: Posterior Composite Resins: The Materials and Their Clinical Performance.  JADA 126:663-676, May 1995.

Reality.  Vol 12, 1998.

Schwartz, Summit, Robbins: Fundamentals of Operative Dentistry, 1996.

Sturdevant: Operative Dentistry, 1994.