ABSTRACT
The aim of this pilot study was to investigate the bone responses of novel magnesium (Mg)–incorporated sand-blasted and acid-etched (SLA) titanium (Ti) implant in an experimental animal model. Novel Mg-incorporated SLA Ti implant was obtained via vacuum arc source ion implantation method and Mg-ions were implanted into the SLA implant surface. Control group consisted of two commercial implants; resorbable blasting media (RBM) and SLA. Twelve implants from each group were placed into the mandibles of 6 mongrel dogs. Experimental animals were divided into 2 groups of 3 animals, with 4 weeks and 8 weeks healing time points. Resonance frequency analysis was performed at the time of fixture installation, 1, 2, 4, and 8 weeks after installation. Bone to implant contact (BIC) measurements were assessed at the 4 and 8 weeks healing time points. The overall implant survival rate was 97.2%. The Mg-incorporated SLA Ti implants showed more rapid osseointegration than control group implants at follow-up periods of 4 weeks. Histomorphometric analysis showed a tendency for BIC% values of Mg-incorporated SLA Ti implant to be higher than that of other the implant groups. The results of this study suggest that Mg-incorporated SLA Ti implant may be effective in enhancing the bone responses by rapid osseointegration in early healing periods.
Subject(s)
Animals , Dogs , Dental Implants , Follow-Up Studies , Magnesium , Mandible , Methods , Models, Animal , Osseointegration , Pilot Projects , Survival Rate , Titanium , VacuumABSTRACT
Hemifacial microsomia (HFM) is the most common craniofacial anomaly after cleft lip and cleft palate; this deformity primarily involves the facial skeleton and ear, with either underdevelopment or absence of both components. In patients with HFM, the management of the asymmetries requires a series of treatment phases that focus on their interception and correction, such as distraction osteogenesis or functional appliance treatment during growth and presurgical orthodontic treatment followed by mandibular and maxillary surgery. Satisfactory results were obtained in a 9-year-old girl with HFM who was treated with distraction osteogenesis. At the age of 19, genioplasty and mandible body augmentation with a porous polyethylene implant (PPE, Medpor(R), Porex) was sequentially performed for the functional and esthetic reconstruction of the face. We report a case of HFM with a review of the literature.
Subject(s)
Child , Female , Humans , Cleft Lip , Cleft Palate , Congenital Abnormalities , Ear , Follow-Up Studies , Genioplasty , Goldenhar Syndrome , Mandible , Osteogenesis, Distraction , Polyethylene , SkeletonABSTRACT
"Acknowledgements" section should be inserted in this article.
ABSTRACT
Subject(s)
Humans , Carcinoma, Squamous Cell , Diagnosis , Follow-Up Studies , Leukoplakia , Mouth , Neoplasm Recurrence, Local , Neoplasms, Second Primary , Prognosis , Recurrence , Tongue Neoplasms , TongueABSTRACT
INTRODUCTION: Fibrous-osseous lesions of the jaws are difficult to diagnose precisely until excised biopsy results are found, so they might be confused with malignant lesions. This clinical study focused on the diagnostic aids of lesions that demonstrate different clinical, radiologic, and histological findings. MATERIALS AND METHODS: A total of 16 patients with benign fibrous-osseous lesions on the jaws (6 fibrous dysplasias, 6 ossifying fibromas, 3 cemental dysplasias, and one osteoblastoma) were reviewed. Nine patients with malignant fibrous-osseous lesions (8 osteosarcomas and one Ewing's sarcoma) were also retrospectively reviewed. RESULTS: Osteosarcoma patients complained of facial swelling and tooth mobility. The radiographic findings showed the irregular resorption of cortical bone and periosteal reactions. Histological features included cellular pleomorphism and atypical mitosis. An Ewing's sarcoma patient complained of tooth mobility and facial swelling. Onion-skin appearance and irregular expansile marginal bony radiolucency were seen in the radiography. Fibrous dysplasia patients complained of facial swelling and asymmetry. The radiographic features were mostly ground-glass radiopacity. Histological findings showed a bony trabeculae pattern surrounded by fibrous ground substances. Ossifying fibroma patients complained of buccal swelling and jaw pains, showing expanded cortical radiolucent lesions with a radiopaque margin. Histological findings were revealed as cellular fibrous stroma with immature woven bones. In cemental dysplasia, most of their lesions were found in a routine dental exam. Well-circumscribed radiopaque lesions were observed in the radiography, and cementum-like ossicles with fibrous stroma were seen in the microscopy. An osteoblastoma patient complained of jaw pain and facial swelling. Radiographic findings were mottled, dense radiopacity with osteolytic margin. Trabeculae of the osteoid with a vascular network and numerous osteoblasts with woven bone were predominantly found in the microscopy. CONCLUSION: Our study showed similar results as other studies. We suggest the clinical parameters of diagnosis and treatment for malignant and benign fibrous-osseous lesions of the jaws.
Subject(s)
Humans , Biopsy , Fibroma, Ossifying , Jaw , Microscopy , Mitosis , Osteoblastoma , Osteoblasts , Osteosarcoma , Retrospective Studies , Sarcoma, Ewing , Tooth MobilityABSTRACT
Subject(s)
Humans , Adenoma, Pleomorphic , Congenital Abnormalities , Cosmetics , Depression , Facial Nerve Injuries , Incidence , Sweating, GustatoryABSTRACT
Subject(s)
Humans , Arteries , Cicatrix , Esthetics , Forearm , Free Tissue Flaps , Hand , Hand Strength , Head , Jugular Veins , Maxilla , Mouth , Mouth Floor , Mouth Mucosa , Neck , Palate , Parenteral Nutrition , Retrospective Studies , Sensation , Skin , Surgery, Oral , Survival Rate , Thigh , Thyroid Gland , Tissue Donors , Tongue , Transplants , WristABSTRACT