ABSTRACT
Forty-five cobalt-chromium alloy porous rooted dental implants were placed in dogs. They were evaluated periodically over two years. The implants were successful one-third of the time. Failures occurred early (two months) or late (after six). Attempts to explain the failures, early and late, are made.
Subject(s)
Chromium Alloys , Dental Implantation, Endosseous/instrumentation , Alveolar Process/anatomy & histology , Animals , Bone Resorption/pathology , Dogs , Evaluation Studies as Topic , Gingiva/anatomy & histology , Mandible/diagnostic imaging , Particle Size , Periodontium/anatomy & histology , Radiography , Surface Properties , Time FactorsABSTRACT
Forty-three porous rooted polymethylmethacrylate (PMMA) dental implants were inserted into twenty-four dogs. Successful implants were maintained for up to three years. Histological sections with the implants in situ of implants revealed a soft tissue-implant interface similar to natural teeth. Bone and fibrous tissue ingrowth into the pores attached the implant to the bone. Failures were attributed to mechanical weakness of the implant, thin buccal cortical bone, and excessive implant-gingiva interface.
Subject(s)
Dental Implantation, Endosseous , Methylmethacrylates , Alveolar Process/anatomy & histology , Alveolar Process/diagnostic imaging , Alveolar Process/physiology , Animals , Biocompatible Materials , Dogs , Gingiva/anatomy & histology , Osteogenesis , Periodontal Diseases/etiology , Periodontal Ligament/anatomy & histology , Periodontitis/etiology , Polymers , Radiography , Surface Properties , Wound HealingABSTRACT
Standardized photography was used to determine the presence of "creeping attachment" after free autogenous graft procedures on localized areas of root recessions. "Creeping attachment" occurred in all seven experimental teeth with an average of 0.89 +/- 0.46 mm and a range of 0.38--0.61 mm during a period of 1 year. The results encourage the use of grafts over exposed root surface in an attempt for gingival coverage.
Subject(s)
Gingiva/anatomy & histology , Gingivoplasty , Adolescent , Adult , Child , Epithelium/anatomy & histology , Female , Gingiva/transplantation , Gingival Diseases/surgery , Humans , Male , Middle Aged , Transplantation, AutologousSubject(s)
Periodontitis/etiology , Aging , Alveolar Process , Chronic Disease , Crowns/adverse effects , Dental Enamel/anatomy & histology , Dental Materials/adverse effects , Denture, Partial/adverse effects , Diabetes Complications , Female , Food/adverse effects , Genetic Diseases, Inborn/complications , Gingival Diseases/complications , Hematologic Diseases/complications , Humans , Incisor/anatomy & histology , Jaw Diseases/complications , Labial Frenum/anatomy & histology , Malocclusion/complications , Maxilla , Mouth Breathing/complications , Mouth Mucosa/anatomy & histology , Nutritional Physiological Phenomena , Pregnancy , Pregnancy Complications , Puberty , Stress, Physiological/complications , Surface PropertiesABSTRACT
The fabrication, characterization, and clinical results of porous rooted alumina dental implants in animals are presented. Failures of all implants occurred in less than six months and were attributed to the presence of microporosity on the crown and cervical portion of the implant which prevented the establishment of an effective biological seal between the oral cavity and the alveolus.
