RESUMO
We evaluated the feasibility of performing preoperative spiral CT of the maxilla and mandible with a radiation dose similar to that used for conventional panoramic radiography. The skin entrance doses of radiation used for spiral CT (collimation, 1 mm; pitch, 2; tube voltage, 80 kV; tube current, 40 mA) and for panoramic radiography (75 kV, 8 mA, 15 seconds) were measured in one patient by using thermoluminescent dosimeter chips. Results were 0.56 +/- 0.06 mGy for CT and 0.59 +/- 0.04 mGy for radiography. Image quality was adequate for preoperative implant planning. Spiral CT of the mandible and maxilla may therefore be feasible with a radiation dose of similar magnitude as that used for conventional panoramic radiography.
Assuntos
Mandíbula/diagnóstico por imagem , Maxila/diagnóstico por imagem , Radiografia Panorâmica , Dosimetria Termoluminescente , Tomografia Computadorizada por Raios X , Implantes Dentários , Estudos de Viabilidade , Humanos , Masculino , Pessoa de Meia-Idade , Boca Edêntula/diagnóstico por imagem , Doses de RadiaçãoRESUMO
This report describes a surgical technique for reconstruction of the buccolingually reduced alveolar process. The technique involves the preparation of an artificial socket with immediate implant placement, which reduces total treatment time compared with two-stage procedures. Alveolar preparation comprises lamellar cortical splitting of the alveolus, interlamellar implant placement, and primary stabilization based on a microfixation technique. It was used for a wide range of indications involving single and multiple alveoli related to the partially dentate and the edentulous alveolar process. The results of 24 Branemark standard implants and 97 ITI implants with 44 consecutively treated patients have been reviewed with a mean observation time of 34.3 months (range 6 to 68 months). The main indicator for alveolar reconstruction was the narrow anterior maxillary arch. The 5-year cumulated success rate was 86.2%. Twelve implants failed during the observation period. The mean marginal bone loss was 1.7 mm (range 0 to 7.5 mm). There was a low infection rate compared with membrane-based GTR techniques. Treatment costs were low as a result of shorter treatment time.
Assuntos
Aumento do Rebordo Alveolar/métodos , Alveoloplastia/métodos , Parafusos Ósseos , Implantes Dentários , Osteotomia/métodos , Adolescente , Adulto , Idoso , Perda do Osso Alveolar/etiologia , Aumento do Rebordo Alveolar/efeitos adversos , Aumento do Rebordo Alveolar/economia , Alveoloplastia/efeitos adversos , Alveoloplastia/economia , Parafusos Ósseos/efeitos adversos , Parafusos Ósseos/economia , Arco Dental/cirurgia , Implantes Dentários/efeitos adversos , Implantes Dentários/economia , Planejamento de Prótese Dentária , Falha de Restauração Dentária , Feminino , Seguimentos , Regeneração Tecidual Guiada Periodontal/efeitos adversos , Custos de Cuidados de Saúde , Humanos , Arcada Edêntula/cirurgia , Arcada Parcialmente Edêntula/cirurgia , Masculino , Maxila/cirurgia , Pessoa de Meia-Idade , Osteotomia/efeitos adversos , Osteotomia/economia , Infecção da Ferida Cirúrgica/etiologia , Resultado do TratamentoRESUMO
The transverse inclination, height and width of 20 lingually placed hydroxylapatite (HA) implants, to augment the atrophic mandibular ridge, were examined using computed tomography of cross sections through the first molar region. Favourable prosthetic conditions are achieved if the HA-implants are placed in a lingual position. This is the case when the transverse inclination varies from 65 to 85 degrees.
Assuntos
Aumento do Rebordo Alveolar/métodos , Hidroxiapatitas , Mandíbula/cirurgia , Próteses e Implantes , Alveoloplastia , Atrofia , Durapatita , Feminino , Humanos , Hidroxiapatitas/química , Masculino , Mandíbula/diagnóstico por imagem , Mandíbula/patologia , Contenções , Tomografia Computadorizada por Raios X , VestibuloplastiaRESUMO
The use of high resolution spiral computed tomography with additional 2-D reconstruction is demonstrated for a patient with a deeply impacted first mandibular molar. The precise anatomical localization enabled us to remove the tooth without damaging the inferior alveolar nerve.