ABSTRACT
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.
Subject(s)
Molar/diagnostic imaging , Radiographic Image Enhancement/methods , Tomography, X-Ray Computed/methods , Tooth, Impacted/diagnostic imaging , Adolescent , Humans , Image Processing, Computer-Assisted , Intraoperative Complications/prevention & control , Male , Mandible/diagnostic imaging , Mandible/surgery , Mandibular Nerve/diagnostic imaging , Molar/surgery , Osteotomy/methods , Preoperative Care , Radiography, Panoramic , Tooth Apex/diagnostic imaging , Tooth, Impacted/surgeryABSTRACT
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.
Subject(s)
Alveolar Ridge Augmentation/methods , Alveoloplasty/methods , Bone Screws , Dental Implants , Osteotomy/methods , Adolescent , Adult , Aged , Alveolar Bone Loss/etiology , Alveolar Ridge Augmentation/adverse effects , Alveolar Ridge Augmentation/economics , Alveoloplasty/adverse effects , Alveoloplasty/economics , Bone Screws/adverse effects , Bone Screws/economics , Dental Arch/surgery , Dental Implants/adverse effects , Dental Implants/economics , Dental Prosthesis Design , Dental Restoration Failure , Female , Follow-Up Studies , Guided Tissue Regeneration, Periodontal/adverse effects , Health Care Costs , Humans , Jaw, Edentulous/surgery , Jaw, Edentulous, Partially/surgery , Male , Maxilla/surgery , Middle Aged , Osteotomy/adverse effects , Osteotomy/economics , Surgical Wound Infection/etiology , Treatment OutcomeABSTRACT
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.
Subject(s)
Mandible/diagnostic imaging , Maxilla/diagnostic imaging , Radiography, Panoramic , Thermoluminescent Dosimetry , Tomography, X-Ray Computed , Dental Implants , Feasibility Studies , Humans , Male , Middle Aged , Mouth, Edentulous/diagnostic imaging , Radiation DosageABSTRACT
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.
