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Clinical experience with direct-bonded orthodontic retainers.

The experience obtained in clinical evaluation of forty-three direct-bonded mandibular canine-to-canine retainers after a minimum observation period of 1 year (range, 1 to 2.5 years) is summarized. Results indicate that the bonded retainer has all the advantages of a fixed soldered retainer, in addition to being invisible. Patient acceptance was excellent, and the failure rate in terms of loose retainers was low. Also, for a number of other retention problems, direct bonding with different types of lingual wire seems to open up a range of promising new possibilities.

Adolescent↗

The immediate palatal plate.

The immediate palatal plate is therapeutically beneficial for relief of temporomandibular joint pain, for reduction of occlusal trauma with and without selective grinding, for orthodontic tooth movement as a disarticulating device, and for relief of pericementitis subsequent to periodontal surgery. The immediate palatal plate is durable and well tolerated by patients and has established itself to be more than just an interim appliance.

Acrylic Resins↗

Instrumentation for placement of vitreous carbon endosseous implants.

The instruments required for placement, stabilization, and restoration of vitreous carbon endosseous implants are conventional in character and readily available. With the exception of extra-long burs for socket preparation, all instruments are normally available in dental offices. The surgery instruments should be rigorously sterilized prior to use, including the dental handpiece, burs, suction tip, etc. Gas sterilization techniques provide an effective means of sterilizing the surgical instruments without causing corrosion of burs and the handpiece.

Alveolar Process↗

Prosthetic contingencies for future tooth loss.

Possible contingencies for future natural tooth loss that can and should be built into prostheses have been reviewed. These contingencies provide a measure of security to the patient and the dentist when attempting to maintain teeth that appear to have a guarded prognosis. Without a contingency these questionable teeth would be extracted early in therapy from fear that a completely new prosthesis would have to be made if they were lost at a later time. In maintaining more natural teeth, the patient has better function, more occlusal and vertical support, longer maintenance of the alveolar ridge, more support for the prosthesis, and more remaining teeth to share all the forces. This approach of building in contingencies for future tooth loss allows the patient and the dentist the freedom to attempt therapy on abutments with a guarded prognosis with little financial risk.

Crowns↗

Stabilization technique for mobile teeth.

A new technique for immobilization of teeth uses inexpensive, readily available, medically acceptable, and biocompatible nylon thread. Three monofilament nylon threads of sizes between Nos. 25 and 40 are interwoven to a braid to form, along with the threaded pins, the stabilization media. A channel along the stabilized teeth is prepared; the braid is placed in it and fastened onto the teeth with the help of pins, which are threaded on them through the braid. The advantages of this method are also presented and discussed.

Acid Etching, Dental↗

Maxillofacial fracture repairs.

Oral trauma remains a common presentation in a small animal practice. Most fractures are the result of vehicular accidents. Among other causes are falls, kicks, gunshots wounds, and encounters with various hard objects ranging from baseball bats and golf clubs to horse hooves and car doors. Next in popularity are dog fights, especially when a large dog and a small dog are involved, and fights with other animals. With cats, falls from various heights are responsible for a large percentage of presentations.

Animals↗

Autotransplantation of immature third molars into edentulous and atrophied jaw sections.

The aim of the present study was to assess the results after transplantation of 85 immature third molars. Recipient site conditions varied and different surgical techniques were used. The long-term results after preparation of a new alveolus, splitting osteotomy of the alveolar process or use of free bone autografts were compared with the results after transplantation into a fresh extraction site (control group). Transplantations into prepared sockets showed equal results to the control group (94% respectively). Transplantations in connection with free bone autografts (84%) or after splitting osteotomy of the alveolar process (63%) showed poorer success rates, the differences between the latter and the control group being statistically significant. A possible correlation to revascularization disturbances of the pulp due to an insufficiency of the recipient site or to postoperative infection is suspected. The results show that transplantation of immature third molars is a safe, useful procedure when appropriate conditions of the recipient site are present. Where the alveolus is atrophic, a splitting osteotomy should be performed only in exceptional cases and preference should be given to alternative methods such as primary bone augmentation or bone-regenerative procedures.

Adolescent↗

The prosthodontic concept of crown-to-root ratio: a review of the literature.

Crown-to-root ratio is intended to serve as an aid in predicting the prognosis of teeth. However, controversy persists as to its impact on diagnosis and treatment planning. This article critically reviews the available literature on the crown-to-root ratio assessment and criteria for evaluation of abutment use of periodontally compromised teeth. A Medline search was completed for the time period from 1966 to 2003, along with a manual search, to locate relevant peer-reviewed articles and textbooks published in English. Key words used were "crown-to-root ratio," "periodontal compromised dentition," "mobility," and "biomechanics." There was a dearth of evidence-based research on the topic. Although the use of the crown-to-root ratio in addition to other clinical indices may offer the best clinical predictors, no definitive recommendations could be ascertained.

Alveolar Bone Loss↗

Using composite bonding in oral and maxillofacial surgical office practice.

OBJECTIVE: Composite bonding plays a significant role in all phases of dental practice from orthodontics to restorative dentistry and even endodontics, yet, at the present time has had limited use by the oral and maxillofacial surgeon. The purpose of this article is 3-fold: to recommend a material for bonding and the method of application for composites; to describe the requirements of the orthodontist when referring a patient for the uncovering of teeth because this is usually the surgeon's primary, if not only, experience with bonding; and to describe situations that may present in the office that will benefit with the use of composite bonding. PATIENTS AND METHODS: Patients with various problems requiring the stabilization of teeth are presented and in a number of cases the effectiveness of the wired bar and the bonded bar is compared. These cases include the management of dentoalveolar fractures, avulsed or displaced teeth, its application to porcelain restorations without ill effects, and other situations that may arise in the office where fixation and stabilization of teeth is mandatory for success. RESULTS: Composite bonding provides the most effective method of stabilizing and immobilizing teeth with successful results in almost all cases. On the other hand, the wired arch bar and other wire combinations, which at the present time is the primary, if not the only treatment for these cases, are second to it from all aspects. CONCLUSION: The successful results with composite bonding along with its case of placement without pain or bleeding or psychological stress on the patient or operator warrants consideration by the oral and maxillofacial surgeon for greater utilization of this material in his office.

Composite Resins↗

Endodontic stabilizers.

With the recent influx of osseointegrated endosseous implants in dentistry, attention has been drawn away from using endodontic stabilizers as a means of stabilizing and retaining teeth. It is our opinion that endodontic stabilizers should be considered in the treatment planning of seemingly nonretainable teeth. They are biocompatible and have the additional advantage of maintaining the periodontal membrane attachment of the remaining tooth. Extraction and subsequent replacement with osseointegrated implants should only be considered after all other means of retaining the natural tooth have been fully explored. Selective case studies from various areas of the dentition demonstrate the broad applicability of stabilizers. A technique is presented for the use of endodontic stabilizers.

Dental Abutments↗

Spontaneous apical closure of an avulsed immature incisor.

Apical closure of nonvital teeth can be achieved by appropriate endodontic intervention. A case is reported in which apical maturation appears to have occurred without treatment and in the presence of sporadic drainage from a sinus tract stoma.

Child↗