Telescopic Crowns Attachments for Implant Supported Restorations
The use of dental implants to support mandibular or maxillary
overdentures is a widely used treatment modality. Advantages are an
increase in retention, an increase in chewing ability, and easy
access for oral hygiene procedures. While telescopic and conical
crowns have been used for decades to connect natural teeth to
overdentures, not many cases have been reported in the literature
of telescopic crowns placed on implants to support overdentures.
This article describes 7 patients with overdentures supported by
telescopic crowns who received 65 implants (ITI Straumann). The
cases presented in this report have been in function for up to 4.5
years. During that time no adverse events were reported. The use of
telescopic crowns as attachments for implant-supported overdentures
may be a viable treatment option.
The use of telescopic crowns on natural teeth (ie, a double crown
system in which an interior crown with a cylindrical shape is
placed on the tooth to support a removable crown), is a treatment
concept that has been widely and successfully used to support
dentures since telescopic crowns were introduced in the 1970s.1–18
They allow for easy access for oral hygiene around the abutment
teeth as well as easy handling of the overdenture.4 The
comparatively high retention obtained leads to good mastication and
phonetics. Therefore, they often offer more advantages than other
types of attachments.
Telescopic crowns also allow for an overdenture design that
includes teeth with questionable long-term prognosis, leaving room
for later tooth removal if necessary, while still guaranteeing
sufficient support of the denture.
The use of implant-supported overdentures is a treatment approach
with a very high long-term success rate.19–22 The use of implants
to support overdentures increases patient comfort by improving
retention and chewing ability.
Compared to the use of fixed-implant–supported dentures, this
treatment modality often leads to an esthetically more pleasant
result, the best access for oral hygiene, and allows for the use of
a lower number of implants. Furthermore, the use of overdentures,
tooth- or implant-supported, is often beneficial for phonetic
Bar, ball, and magnetic attachments have been suggested to connect
the overdenture to the implants.23–25 Contrary to their use on
natural teeth, there are not many reports in the literature on the
use of telescopic crowns for the connection between implants and