Search results for "Osteotomy"
showing 10 items of 81 documents
Need for lateral bone augmentation at two narrow-diameter implants: A prospective, controlled, clinical study.
2021
To detect the potential influence of implant diameter and anatomic factors on the need for bone augmentation procedures (BAPs) when replacing congenitally missing lateral incisors (MLIs).Patients with congenitally missing MLIs with a mesio-distal distance between the canine and the central incisor of 5.9-6.3 mm received a Ø2.9 mm implant while Ø3.3 mm implants were placed when the distance was 6.4-7.1 mm. The following linear measurements were recorded using a calliper: width of the alveolar process (WAP), width of the bony alveolar ridge (WAR) and thickness of the facial bone after implant osteotomy (TFB). Guided bone regeneration was performed in case of fenestration- or dehiscence-type d…
From medical data to simple virtual mock-up of scapulo-humeral joint
2008
The surgical operations of shoulder joint are guided by various principles: osteosynthesis in the case of fracture, osteotomy in order to correct a deformation or to modify the functioning of the joint, or implementation of articular prosthesis. At the end of the twentieth century, many innovations in the domains of biomechanics and orthopedic surgery have been performed. Nevertheless, theoretical and practical problems may appear during the operation (visual field of surgeon is very limited, quality and shape of the bone is variable depending on the patient). Biomechanical criteria of success are defined for each intervention. For example, the installation with success of prosthetic implan…
Two- and three-dimensional evaluation of the upper airway after bimaxillary correction of Class III malocclusion
2009
Objective The aim the study was to evaluate area and volumetric changes in the upper airway after bimaxillary correction of Class III malocclusion by the means of computer tomography (CT), and to compare these to the changes in linear measurements from lateral cephalograms. Study design This was a prospective clinical trial. Lateral cephalograms and CT scans of 10 Class III patients were evaluated 1 week before and 6 months after surgery. Wilcoxon matched pairs signed ranks test was used to determine the differences in measurements pre- and postoperatively. Spearman's rank correlation was used to test the association between the CT and cephalometric measurements. Results CT measurements: Th…
A novel trephine design for sinus lift lateral approach. Case report
2010
Various techniques are described in the literature, either by crestal or lateral approach. Sinus augmentation has a high percentage of success, but presents a number of intraoperative and postoperative complications. The most frequent complication is the Schneiderian membrane perforation with a percentage of perforations between 11% and 56% according to authors. The aim of this study is to describe another membrane approach technique for the sinus lateral wall osteotomy that minimizes the risk of Schneiderian membrane perforation. We present a case of a 50 year old patient attended the University Dental Clinic (UDC) of International University of Catalonia for implant and crown treatment du…
Microsurgical treatment of midfacial tumours involving the skull base
1998
Various approaches to the base of the skull for the treatment of cranial base tumours are described in detail. Advantages and disadvantages of the particular approaches are discussed. This clinical experience is based on 303 neoplasms involving the base of the skull, operated on by the authors. Retrospective survival studies are presented and a review of the literature on the subject is discussed. Utilizing microsurgical techniques the 2-, 3- and 5-year survival rates were significantly improved. The functional and aesthetic outcomes were also dramatically superior compared with standard ablative procedures. Reconstructive postoperative strategies are suggested.
Therapy and prognosis of extraoral malignant melanoma metastasizing to the jaw: case report and literature review.
2009
t a d With approximately 75% of all skin cancer-related deaths, malignant melanoma (MM) is the most lethal among common skin cancers, mostly because of its disposition to early lymphogenic and hematogenic metastasis. If a MM is diagnosed early, the overall prognosis is excellent, but once metastasized it becomes an incurable disease with high mortality. Prognosis is dependent on parameters such as gender, anatomic location, level of invasion, thickness, type of primary tumor, ulceration, and number and status of regional lymphatic nodes. For incidence and mortalty, a decrease in young but an increase in older roups—with geographic differences—has been reported. Because of the embryologic or…
Periodontal impact of surgically induced dental lesions in mandibular osteodistraction: An animal study.
2009
SUMMARY. Aim: The objective of the study was to evaluatethe impact of dental lesions on the periodontium, in a canine model of mandibular osteodistraction. Material and methods: In six adult male Beagle dogs, an osteotomy was made between the right second lateral incisor and canine, and a distraction device placed. The roots adjacent to the osteotomy were deliberately damaged by the reciprocating saw and chisel, with preservation of the attached gingiva. The osteodistraction protocol used was: latency of 7 days, rate of distraction 1 mm per day, and rhythm once a day for 5 days. Vital staining was carried out with tetracycline, Xylenol Orange and Calcein Green. The dogs were sacrificed afte…
Meta-analysis of the increase in height in maxillary sinus elevations with osteotome
2011
Objectives: To compare the different variations of sinus elevation techniques with osteotomes, to evaluate the increase in height achieved, and to quantify the osseointegration periods and the success rates for the implants placed. Study Design: A meta-analytic study with descriptive statistics was carried out on sinus elevations using osteotomes, analyzing a total of 11 articles published between the years 2003 and 2008. Results: Summers’ classic technique for performing sinus elevations with osteotomes differs from the current techniques being used with respect to the use of drills, the manner in which the sinus floor is fractured and how the sinus membrane is lifted, and especially on th…
Self-drilling and self-tapping miniscrews for osteosynthesis fixture after LeFort I osteotomy: An ex vivo trial for primary stability and a randomize…
2017
Abstract Background Self-drilling osteosynthesis screws (SDS) have a potential higher primary stability together with clinical advantages such as less time effort compared to self-tapping screws (STS). The aims of the study were to compare the primary stability of SDS and STS ex vivo and to analyze of the time-saving effect in vivo . Materials and methods Ex vivo , both screws were placed in porcine bone. Torque was measured for insertion and removal. Four specimens were kept in bone for histologic bone-to-implant-contact examination. In vivo , 49 patients who received orthognathic surgery in the maxilla were included in 2 centers. In a split-mouth design, the time for osteosynthesis fixati…
Endoscopic Intracranial Craniofacial and Monobloc Osteotomies with the Aid of a Malleable High-Speed Pneumatic Drill: A Cadaveric and Clinical Study
2000
Endoscopic techniques are now an accepted part of the surgical armamentarium and are used routinely in a number of aesthetic and reconstructive procedures. Endoscopic techniques are now being used commonly by plastic surgeons in forehead and face lifts. In both craniofacial surgery and in neurosurgery, the application of endoscopy potentially allows the surgical team to perform wide dissection of the dura mater in a minimally invasive fashion, thereby potentially reducing the risk of dural and brain injury. Also reduced by this surgical approach is potential injury to the major venous structures, such as the sagittal sinus, along with overall reduced bleeding. After an extensive laboratory …