Orthodontics and Orthodontology Commons^™

Fracture Properties Of Different Orthodontic Bonding Materials, Daryl Lynden Proctor

Loma Linda University Electronic Theses, Dissertations & Projects

Spontaneous debonding has proven a constant problem since the introduction of bonded orthodontic brackets in the early 1960's by Newman¹.

Components in classic bond strength testing are the bracket, the adhesive, the adhesive curing method, the type of teeth used, and the test method. These tests lead to extensive and compounding variables that make it difficult to evaluate the performance of any of the components individually.

The purpose of this study was to compare several contemporary orthodontic bonding adhesives by testing the physical and mechanical characteristics of the adhesives alone. Material properties compared were sonic and tensile measurements …

Optimum Bonding Time Of Four Different Curing Lights, Nathan Don Cotten

Loma Linda University Electronic Theses, Dissertations & Projects

With the development of new high-intensity curing lights, the time required to bond orthodontic brackets is steadily decreasing. The objective of this study was to determine the optimum curing time for bonding orthodontic brackets using four different visible curing lights (Standard Optilux 501, High Intensity Optilux 501 with Turbo Tip, Virtuoso Plasma Arc, and ESPE LED light). This study also tested the new generation of light emitting diode (LED) lights to determine if they can be used for bonding orthodontic brackets. Three hundred freshly extracted bovine teeth were mounted in acrylic resin and divided into 20 groups of 15 teeth …

A Continued Investigation Of Craniofacial Growth In Infant Heart Transplant Recipients Receiving Cyclosporine, John Michael Cornali

Loma Linda University Electronic Theses, Dissertations & Projects

Cyclosporine is an effective immunosuppressive drug that has found widespread application in organ transplantation. A couple of studies, however, have implicated cyclosporine as adversely affecting craniofacial growth in the pediatric population. The purpose of this follow-up study was to continue to evaluate the possible untoward effects of long-term use of cyclosporine on craniofacial growth in a group of infant heart transplantation recipients by re-evaluating as many subjects as possible from the original study and evaluating new subjects. A prospective group (N=29) of eighteen Caucasian subjects (7 female and 11 male, ages 6-15 years) and eleven Hispanic subjects (3 female and …

Evaluation Of Alveolar And Soft Tissue Changes After Muscular Release Surgery In Patients Undergoing Fixed Orthodontic Therapy, Virginia Bernal

Loma Linda University Electronic Theses, Dissertations & Projects

This study compared pre-treatment to post-treatment changes in patients undergoing fixed orthodontic therapy who have had muscular release surgery. The alveolar and soft tissue changes in the mandible of 128 subjects from a private practice in Northern Italy (74 females and 54 males) were analyzed. In addition, comparisons were made of changes related to age, gender, facial type, and movement of the lower incisor. Lateral cephalograms were analyzed before and after treatment for skeletal, esthetic, and dentoalveolar changes. Photographs were used to assess changes in the soft tissue of the lower anterior region at pretreatment (Tl) versus post-treatment (T2). The …