RESUMEN
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.
Asunto(s)
Diente Molar/diagnóstico por imagen , Intensificación de Imagen Radiográfica/métodos , Tomografía Computarizada por Rayos X/métodos , Diente Impactado/diagnóstico por imagen , Adolescente , Humanos , Procesamiento de Imagen Asistido por Computador , Complicaciones Intraoperatorias/prevención & control , Masculino , Mandíbula/diagnóstico por imagen , Mandíbula/cirugía , Nervio Mandibular/diagnóstico por imagen , Diente Molar/cirugía , Osteotomía/métodos , Cuidados Preoperatorios , Radiografía Panorámica , Ápice del Diente/diagnóstico por imagen , Diente Impactado/cirugíaRESUMEN
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.
Asunto(s)
Aumento de la Cresta Alveolar/métodos , Alveoloplastia/métodos , Tornillos Óseos , Implantes Dentales , Osteotomía/métodos , Adolescente , Adulto , Anciano , Pérdida de Hueso Alveolar/etiología , Aumento de la Cresta Alveolar/efectos adversos , Aumento de la Cresta Alveolar/economía , Alveoloplastia/efectos adversos , Alveoloplastia/economía , Tornillos Óseos/efectos adversos , Tornillos Óseos/economía , Arco Dental/cirugía , Implantes Dentales/efectos adversos , Implantes Dentales/economía , Diseño de Prótesis Dental , Fracaso de la Restauración Dental , Femenino , Estudios de Seguimiento , Regeneración Tisular Guiada Periodontal/efectos adversos , Costos de la Atención en Salud , Humanos , Arcada Edéntula/cirugía , Arcada Parcialmente Edéntula/cirugía , Masculino , Maxilar/cirugía , Persona de Mediana Edad , Osteotomía/efectos adversos , Osteotomía/economía , Infección de la Herida Quirúrgica/etiología , Resultado del TratamientoRESUMEN
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.
Asunto(s)
Mandíbula/diagnóstico por imagen , Maxilar/diagnóstico por imagen , Radiografía Panorámica , Dosimetría Termoluminiscente , Tomografía Computarizada por Rayos X , Implantes Dentales , Estudios de Factibilidad , Humanos , Masculino , Persona de Mediana Edad , Boca Edéntula/diagnóstico por imagen , Dosis de RadiaciónRESUMEN
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.