D E P A R T M E N T S:

LETTER TO THE EDITOR:

TO THE EDITOR: • THE AUTHORS REPLY

Colin Dawes, Stella Chaushu, Eitan Yefe-Nof, Adrian Becker, Joseph Shapira, and Gabi Chaushu
J Dent Res 2002 81: 588-589. [Full Text] [PDF]  

DISCOVERY!:

Two Decades of Computerized Information Technologies in Dental Radiography

Ann Wenzel
The author describes her experiences in developing a radiology department utilizing digital radiography in dentistry.

J Dent Res 2002 81: 590-593. [Full Text] [PDF]  

R E S E A R C H  R E P O R T S:

Biological:

Characteristics of Mastication in the Anodontic Mouse

M. Kobayashi, Y. Masuda, M. Kishino, T. Ishida, N. Maeda, and T. Morimoto
Conversion from sucking to mastication occurs in the anodontic mouse, and the central pattern generator producing the masticatory rhythm develops almost normally without tooth eruption.

J Dent Res 2002 81: 594-597. [Abstract] [Full Text] [Figures Only] [PDF]  

Effect of Serotonin (5-HT) on Trigeminal Rhythmic Activities Generated in in vitro Brainstem Block Preparations

A. Mori, M. Kogo, K. Ishihama, S. Tanaka, A. Enomoto, H. Koizumi, and T. Matsuya
Serotonin has both facilitation and inhibition effects on the generation of trigeminal rhythmic activities in an isolated brainstem block preparation in vitro.

J Dent Res 2002 81: 598-602. [Abstract] [Full Text] [Figures Only] [PDF]  

The Localization of Matrix Metalloproteinase-20 (MMP-20, Enamelysin) in Mature Human Teeth

M. Sulkala, M. Larmas, T. Sorsa, T. Salo, and L. Tjäderhane
MMP-20 produced during primary dentinogenesis is incorporated into dentin and may be released during caries progression.

J Dent Res 2002 81: 603-607. [Abstract] [Full Text] [Figures Only] [PDF]  

Biomaterials & Bioengineering:

Bone Strain Patterns of the Zygomatic Complex in Response to Simulated Orthopedic Forces

M.C. Oberheim and J.J. Mao
Headgear-generated orthopedic forces evoke bending of the zygomatic arch and stresses of the temporal articular eminence in vitro, suggesting the need for verification of whether bone strain induces in vivo bone modeling and remodeling.

J Dent Res 2002 81: 608-612. [Abstract] [Full Text] [Figures Only] [PDF]  

Edentulation Alters Material Properties of Cortical Bone in the Human Mandible

C.L. Schwartz-Dabney and P.C. Dechow
Cortical microstructural changes accompany ridge resorption following edentulation.

J Dent Res 2002 81: 613-617. [Abstract] [Full Text] [Figures Only] [PDF] [Data Supplement]  

Dynamic Properties of Bovine Temporomandibular Joint Disks Change with Age

E. Tanaka, J. Aoyama, M. Tanaka, H. Murata, T. Hamada, and K. Tanne
Both the elasticity and viscosity of the TMJ disk increase with age, and this may reflect age-related changes in biochemical composition.

J Dent Res 2002 81: 618-622. [Abstract] [Full Text] [Figures Only] [PDF]  

Influence of Connector Design on Fracture Probability of Ceramic Fixed-partial Dentures

W. Oh, N. Götzen, and K.J. Anusavice
The radius of curvature at the gingival embrasure strongly affects the fracture resistance of all-ceramic fixed-partial dentures, fracture mechanics principles can provide critically important information for the identification of sensitive design factors and probably fracture sites in clinical prostheses, and NASA CARES software used as an adjunct to FEA is useful for the optimization of prosthesis designs.

J Dent Res 2002 81: 623-627. [Abstract] [Full Text] [Figures Only] [PDF]  

A Nanoleakage Perspective on Bonding to Oxidized Dentin

C.K.Y. Yiu, F. García-Godoy, F.R. Tay, D.H. Pashley, S. Imazato, N.M. King, and S.C.N. Lai
Residual sodium hypochlorite within the porosities of mineralized dentin may result in incomplete resin polymerization, and hence compromised bond strength.

J Dent Res 2002 81: 628-632. [Abstract] [Full Text] [Figures Only] [PDF] [Data Supplement]  

HEMA Bound to Self-protein Promotes Auto-antibody Production in Mice

E. Sandberg, G. Bergenholtz, C. Eklund, and U.I. Dahlgren
Modification of an endogenous protein like serum albumin with HEMA may defeat the control of immune responses to the self-protein.

J Dent Res 2002 81: 633-636. [Abstract] [Full Text] [Figures Only] [PDF]  

Clinical:

An Abbreviated Caries Clinical Trial Design Validated over 24 Months

R.K. Chesters, N.B. Pitts, G. Matuliene, A. Kvedariene, E. Huntington, R. Bendinskaite, I. Balciuniene, J.R. Matheson, J.A. Nicholson, A. Gendvilyte, R. Sabalaite, J. Ramanauskiene, D. Savage, and J. Mileriene
This study confirms the validity of an abbreviated trial protocol.

J Dent Res 2002 81: 637-640. [Abstract] [Full Text] [Figures Only] [PDF] [Data Supplement]  

Comparing the Costs of Three Sealant Delivery Strategies

S.O. Griffin, P.M. Griffin, B.F. Gooch, and L.K. Barker
The authors suggest that, over a nine-year horizon, individualized caries risk assessment of children enrolled in most school-based programs may be unnecessary.

J Dent Res 2002 81: 641-645. [Abstract] [Full Text] [Figures Only] [PDF] [Data Supplement]  

Effect of Sustained Contraction on Motor Unit Action Potentials and EMG Power Spectrum of Human Masticatory Muscles

J.W. Chung, C. Kim, and W.D. McCall, Jr.
The authors' results are consistent with a decrease in the conduction velocity of the muscle action potential as an explanation of the spectral shift.

J Dent Res 2002 81: 646-649. [Abstract] [Full Text] [Figures Only] [PDF]  

Capsaicin-induced Muscle Pain Alters the Excitability of the Human Jaw-stretch Reflex

K. Wang, L. Arendt-Nielsen, and P. Svensson
Acute muscle pain is associated with a velocity-dependent, but not length-dependent, increase in the amplitude of the jaw-stretch reflex.

J Dent Res 2002 81: 650-654. [Abstract] [Full Text] [Figures Only] [PDF]  

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