Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Dental Materials
Resorbable Barrier Effect In Sinus Graft Using Anorganic Bone, Kyung-Soo Choi
Resorbable Barrier Effect In Sinus Graft Using Anorganic Bone, Kyung-Soo Choi
Loma Linda University Electronic Theses, Dissertations & Projects
The effect of a resorbable membrane on new bone formation in human maxillary sinus augmentation using anorganic bovine material is unclear at the present time. As a pilot study, six patients who required bilateral maxillary sinus augmentations for endoessous dental implant treatment were grafted with anorganic bovine bone material. All six patients had a resorbable collagen membrane placed over the graft material on only one side for the sinus augmentation. At the time of implant placement, a minimum of 8 months following sinus graft healing, a biopsy was made of each side to permit histomorphometric analysis.
Similar amounts of new …
Stability Of The Miniscrew-Bone Interface: Reverse Torque Values In Rabbits, Daniel John Drye
Stability Of The Miniscrew-Bone Interface: Reverse Torque Values In Rabbits, Daniel John Drye
Loma Linda University Electronic Theses, Dissertations & Projects
Introduction: Miniscrews are used in orthodontics as practical temporary anchorage devices (TAD's). The purpose of this animal study was to measure reverse torque values for Absoanchor 1.2 mm and Micerium 1.5mm miniscrews at 0, 2, and 12 weeks under loaded and unloaded conditions.
Methods: Ninety-six miniscrews were placed in the femora of twelve rabbits and allowed to heal for either two or twelve weeks. Half of the fixtures were loaded immediately with NiTi open coil springs producing a force of 150-200g and the other half served as unloaded controls. For each of the healing times, two and twelve weeks, …
Bone Formation Using Platelet-Rich Plasma + Allograft: An Experimental Study In Sheep, Edgar Grageda
Bone Formation Using Platelet-Rich Plasma + Allograft: An Experimental Study In Sheep, Edgar Grageda
Loma Linda University Electronic Theses, Dissertations & Projects
Recently Platelet-Rich Plasma has been proven to be an effective regeneration adjunct when combined with autogenous bone in the reconstruction of mandibular defects. However, little is known about the effect of PRP when combined with a bone allograft in the maxillary sinus.
The purpose of this study was to quantitatively evaluate the ability of PRP to enhance bone regeneration in the maxillary sinus of sheep when combined with DFDBA + CCFDBA. Ten sheep were selected for bilateral sinus augmentation DFDBA + CCFDBA + PRP (test) and DFDBA + CCFDBA (control). Five were sacrificed at 3 months and the other five …
Microleakage Of Various Restorative Materials Used For Preventive Resin Restorations, Jenny Chung Lee
Microleakage Of Various Restorative Materials Used For Preventive Resin Restorations, Jenny Chung Lee
Loma Linda University Electronic Theses, Dissertations & Projects
Introduction: This research was designed to compare the microleakage of various restorative materials used for preventive resin restorations and two methods of cavity preparation. The purpose of this study was: (1) to compare microleakage of four different restorative materials using two different type of preparation methods (bur and air particle abrasion) and (2) whether the use of a pit and fissure sealant over the restoration decreases microleakage.
Methods: One hundred and twenty eight, permanent human molars were randomly divided into four groups and restored with four restorative materials. Each group had been randomly divided into two subgroups. The teeth in …
An In Vitro Study Of Plaque Deposition And Its Comparative Effect On Bond Strength, Debra L. Finch Cook
An In Vitro Study Of Plaque Deposition And Its Comparative Effect On Bond Strength, Debra L. Finch Cook
Loma Linda University Electronic Theses, Dissertations & Projects
Treatment with fixed orthodontic appliances can change the environment in the oral cavity by creating stagnant areas that facilitate bacterial colonization and substance retention. The purpose of this study was to examine in vitro plaque formation associated with bonded orthodontic appliances and how this could affect bonding strengths.
Ortho Concise and Transbond XT were the composite resin materials used in this study. Mandibular incisor metal brackets were bonded to bovine mandibular anterior teeth. Each composite resin was studied in two groups: plaque growth and without plaque growth, and their bond strengths were compared at time intervals of 3,45, and 180 …