Exhibit 99.1

   National Dentex Corporation Announces Delay in Filing Form 10-K

    WAYLAND, Mass.--(BUSINESS WIRE)--April 8, 2005--National Dentex
Corporation (NASDAQ: NADXE), one of the largest owner/operators of
dental laboratories in the United States, today announced that on
April 5, 2005 it had received by fax a Nasdaq Staff Determination,
dated April 5, 2005 (the "Letter"), indicating that Nasdaq had not
received National Dentex's Form 10-K for the period ended December 31,
2004 as required by Nasdaq Marketplace Rule 4310(c)(14) and informing
National Dentex that its securities accordingly would be delisted from
Nasdaq at the opening of business on April 14, 2005, unless National
Dentex requested a hearing in accordance with the Marketplace Rule
4800 Series, as described in the Letter.
    The Letter further informed National Dentex that as a result of
its filing delinquency the fifth character "E" would be appended to
its trading symbol and that its trading symbol would thus be changed
from "NADX" to "NADXE" at the opening of business on April 7, 2005.
The Letter also informed National Dentex that Marketplace Rule 4815(b)
requires National Dentex, as promptly as possible but no later than
seven (7) calendar days from the receipt of the Letter, to make a
public announcement through the news media to disclose its receipt of
the Letter and the Nasdaq rules upon which it is based, having first,
however, provided a copy of the public announcement to Nasdaq's
StockWatch Department and Listing Qualifications Hearings Department
at least ten (10) minutes prior to its public dissemination.
    The Letter also informed National Dentex that it could appeal
Nasdaq's delisting determination by requesting a hearing with a Nasdaq
Listing Qualifications Panel (a "Panel"). The Letter indicated that
such a request, received by Nasdaq's Hearings Department no later than
4:00 p.m. Eastern Time on April 12, 2005, would stay the delisting of
National Dentex's securities pending a Panel decision.
    National Dentex announced that on April 8, 2005 it had requested
an oral hearing before a Panel and tendered the requisite hearing fee
to appeal and stay the delisting determination set forth in the
Letter. There can be no assurance the Panel will grant National
Dentex's request for continued listing. However, National Dentex is
continuing to work diligently to complete its Annual Report on Form
10-K and currently believes that it will be able to satisfy the
Nasdaq's continued listing requirements.

    About National Dentex

    National Dentex Corporation serves an active customer base of over
20,000 dentists through 45 dental laboratories located in 30 states.
National Dentex's dental laboratories provide a full range of
custom-made dental prosthetic appliances, including dentures, crowns
and fixed bridges, and other dental specialties.

    Safe Harbor Statement

    This press release contains forward-looking statements within the
meaning of the federal securities laws, including statements regarding
our future performance, opportunities, and expected courses of action,
that are based on our current expectations, beliefs, assumptions,
estimates, forecasts and projections about the industry and markets in
which National Dentex operates. The statements contained in this
release are not guarantees of future performance and involve certain
risks, uncertainties and assumptions that are difficult to predict.
Therefore, actual outcomes and results may differ materially from what
is expressed in such forward-looking statements. Important factors
that may affect future operating and financial results include the
timing, duration and effects of adverse changes in overall economic
conditions; National Dentex's ability to acquire and successfully
operate additional laboratories; governmental regulation of health
care; trends in the dental industry towards managed care; increases in
labor, benefits and material costs; product development risks;
technological innovations; compliance with evolving federal
securities, accounting, and marketplace rules and regulations
applicable to publicly-traded companies on the Nasdaq National Market;
and other risks indicated from time to time in National Dentex's
filings with the Securities and Exchange Commission.

    CONTACT: National Dentex Corporation
             Richard F. Becker, 508-358-4422
             Vice President, Treasurer & CFO