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At least 1,009 records · Page 56Linked to original sources
PubMed2003

The application of Bio-Oss and Bio-Gide as implant materials in the complex treatment of aggressive periodontitis.

In the presented study the results of the complex conservative and surgical periodontological treatment using Bio-Oss implant material and the regenerative Bio-Gide collagen membrane by Geistlich company were subjected to clinical and radiological evaluation. The measure depth of the periodontal pockets PPD was subjected to evaluation, the level of the epithelial attachment CAL and the defect of bone of the alveolar process were observed on radiograms. In all patients the state of oral cavity hygiene was examined using the index of API bacterial plaque and the percent of SBI index of bleeding gingiva. The analysis of the examined parameters concerned the period before surgeries and 8 to 12 months after the surgeries of the guided tissue regeneration. On the basis of the conducted research and the statistic analysis, the reduction of the periodontal pockets depth and the reconstruction of the attachment.

Adult↗
PubMed2004

Complex odontoma of unusual size involving the maxillary sinus: report of a case and review of CT and histopathologic features.

An unusually large complex odontoma of the maxilla, occupying the entire maxillary sinus with expansion into the floor of the orbit and left nasal fossa, is reported. Although occurrences of complex odontomas are not considered rare, odontomas attaining extremely large sizes, especially involving the entire maxillary sinus with extension to the orbital floor and nasal fossae, are indeed, rare. In this article, the literature is reviewed to identify the common clinical, radiographic, and histologic characteristics of such lesions, and the outcome of treatment is discussed. Complex odontomas occasionally have significant growth potential, especially in the first two decades of life. Early recognition and consideration for surgical excision are key to successful management of this common odontogenic lesion. When odontomas extend beyond the alveolar process into the fascial planes, nasal fossae, paranasal sinuses, and orbits, computed tomography can readily demonstrate the extent and boundaries of the lesion.

Adolescent↗
PubMed2004

[Repair of maxillary defects by free forearm flap and titanium mesh].

OBJECTIVE: To investigate the clinical effect of free forearm flap and titanium mesh in repairing maxillary defects. METHODS: From January 2002 to November 2002, partial maxillectomy or maxillectomy were performed in 3 patients with maxillary gingival carcinoma, in 1 patient with palatine mucoepicermoid carcinoma and in 1 patient with maxillary sinus carcinoma. Maxillary defects were reconstructed with free forearm flaps ranging from 4 cm x 5 cm to 6 cm x 7 cm and titanium mesh. The effect was estimated by clinical examination, CT and nasopharyngoscope. RESULTS: Five cases were followed up 5-15 months. All the flaps were alive. Facial, alveolar process and palatal contours were restored well. Epithelium was found on the nostril surface of the titanium mesh. The functions of speech and chew were restored well. CONCLUSION: A combination of the free forearm flap and titanium mesh is an ideal method in reconstruction of maxillary defects.

Adult↗
PubMed2004

[Rare case of the large-sized, unilateral incisive canal cyst].

A rare case of an extremely large, unilateral incisive canal cyst (nasopalatine duct cyst), located between the teeth #11 and #25 is presented. The upper border of the cyst extended to the nasal cavity, the posterior border was the maxillary sinus while the lower border was 5 mm above the maxillary alveolar process. The apices of the vital teeth 21, 22, 23 were in the cyst. Cystectomy was combined with the implantation of an osteoconductive bone substitute material (beta-tricalcium-phosphate). The origin of the cyst was verified by histological examination. The authors also review the origin and pathology as well as the clinical and radiological symptoms and therapy of the non-odontogenic cysts.

Humans↗
PubMed2005

Maxillary alveolar ridge augmentation using distraction osteogenesis: a literature review and case report.

The restoration of the edentulous atrophic anterior maxillary ridge has proved difficult. The absence of both gingival and bony alveolar tissue contributes to these problems. Numerous techniques to address these issues have been described. We report a case of a patient who sustained multiple facial injuries as a consequence of an accident, including the loss of the maxillary incisor teeth and associated alveolus. This patient underwent fixed implant supported prosthetic rehabilitation, following the use of distraction osteogenesis in the reconstruction of the edentulous atrophic anterior maxillary ridge.

Adult↗
PubMed2005

[Anatomy of the sphenoidal sinus in transsphenoidal approach through a single nostril].

OBJECTIVE: To study the anatomy of the sphenoid sinus for safe pituitary adenoma resection via transsphenoidal approach through a single nostril. METHODS: Eight fresh adult cadavers and the magnetic resonance images (MRI) of the sphenoidal sinus of 5 adults were observed. In anteroposterior axes, the root of the nasal columella was defined as the point O, the inferior border of the sphenoidal sinus anterior wall as point B, the superior border of the spheniodal sinus anterior wall as point C, and the midpoint of the sellar floor as point D. Line OA ran through the point O in parallel with the maxillary alveolar process. Angle AOB', angle AOC' and angle AOD' were the supplementary angles of angle AOB, angle AOC and angle AOD respectively, and angle AOB', angle AOC', angle AOD', OB, and BC were measured. RESULTS: In the 8 fresh adult cadavers, angle AOB', angle AOC', angle AOD', OB, and BC were (43.2+/-4.3) degrees, (22.9+/-3.0) degrees, (35.4+/-4.1) degrees, 66.3+/-3.6 mm, and 20.9+/-1.5 mm, respectively, with 2 cases having ethmoid cell superior to the sphenoid bone; in the MRI of 50 adults, the measurements were (44.1+/-5.5) degrees, (25.7+/-6.4) degrees, (34.2+/-5.9) degrees, 68.7+/-4.9 mm, and 23.3+/-3.1 mm, respectively, with 15 cases having ethmoid cell superior to the sphenoid bone. Two independent-sample t test and Chi-square test revealed no significant differences in the measurements between the two groups (P>0.05). CONCLUSION: Preoperative MRI facilitates safe opening of the anterior wall of the spheniodal sinus and the sellar floor, and the best angle between the axis of the speculum and line OA was 39 degree.

Adenoma↗
PubMed2005

Nonsurgical and nonextraction treatment of a skeletal class III adult patient with severe prognathic mandible.

AIM: A patient with a skeletal Class III malocclusion, prognathic mandible, anterior open bite, large tongue, and temporomandibular disorders is presented. Treatment objectives included establishing a stable occlusion with normal respiration, eliminating temporomandibular disorder symptoms, and improving facial esthetics through nonextraction and nonsurgical treatment by creating a favorable perioral environment, restoring the harmony to the tongue and perioral environment, improving masticatory muscle function, and creating adequate tongue space for establishment of normal respiration. SUBJECT AND METHODS: The patient was a Japanese adult male, who had previously been advised to have orthognathic surgery, with tongue-size reduction. An expansion plate was used to expand the maxillary dentoalveolar arch. Distalization of the mandibular arch was achieved by reduced excessive posterior vertical dimension, through uprighting and intruding the mandibular posterior teeth and rotating the mandible slightly counter-clockwise. The height of the maxillary alveolar process and the vertical height of symphysis were increased slightly. The functional occlusal plane was reconstructed by uprighting and intruding the posterior teeth with a full-bracket appliance, combined with a maxillary expansion plate, with short Class III and vertical elastics in the anterior area. Myofunctional therapy involved sugarless chewing gum exercises. RESULTS: The excessive posterior vertical occlusal dimension was reduced slightly, creating a small clearance between the posterior maxilla and mandible. At the same time, the interferences in the posterior area were eliminated by the expansion of the maxillary dentoalveolar arch. As a result, the laterally displaced mandible moved to a more favorable jaw relationship, with distalization of the mandibular arch. The functional occlusal plane was reconstructed and an almost-normal overjet and overbite were created. Adequate tongue space for normal respiration was established during the early stage of treatment, by 7 months. A stable occlusion, with adequate posterior support and anterior guidance, was established and maintained at more than 4 years posttreatment.

Adolescent↗
PubMed2006

[Histologic findings in subantral augmentation (sinus lift)].

Subantral augmentation (sinus lift) is used to increase alveolar bone mass of lateral maxilla in order to insert dental implants. In addition to the autogenous bone several foreign materials can be used for augmentation and they can replace the autogenous bone to some extent. Histological findings in specimens taken nine months after augmentation with the autogenous bone, deproteinised bovine bone (Bio-Oss) and beta-tricalcium phosphate (Cerasorb) are presented. In all cases a new bone formation around the augmentation material was seen. The new bone was deposited predominantly on its surface. In cases with Cerasorb the new bone formation was observed within the porous granules, too. From the obtained results it can be concluded, that the main osteogenetic mechanism in the examined augmentation materials was osteoconduction. The biocompatibility of the used augmentation materials was evidenced by an absence of giant cell granulomatous reaction and of marked inflammatory infiltrate.

Adult↗
PubMed2006

Maxillary sinus augmentation using granular calcium sulfate (surgiplaster sinus): radiographic and histologic study at 2 years.

The main goal of sinus augmentation is the formation of vital bone to allow tissue integration of endosseous implants to support prosthetic rehabilitation. The aim of the present investigation was to evaluate the radiographic and histologic results when granular medical-grade calcium sulfate hemihydrate was used as a grafting material in sinuses. Forty implants plus grafting material were placed in 10 patients, representing 15 sinuses, using a one-stage technique. Radiographs were taken prior to sinus augmentation, monthly until 6 months postoperatively, 9 and 12 months after implant placement, and annually thereafter. Bone biopsies were harvested from all patients for histologic and histomorphometric evaluation.

Alveolar Process↗
PubMedDate not supplied

Short implants--an analysis of longitudinal studies.

PURPOSE: The purpose of this study was to consider the therapeutic decision whether to use advanced surgery or short implants based on data concerning the use of these implants found in follow-up studies. MATERIALS AND METHODS: The MEDLINE database was consulted for follow-up studies published between the years 1980 and 2004. For those studies that met the inclusion and exclusion criteria, data concerning the number of implants 7, 8.5, or 10 mm long placed and lost, the time at which the failure occurred, and related risk factors were gathered for 33 studies arranged in tables and subjected to analysis. The studies included 16,344 implant placements with 786 failures (4.8%). Implants were analyzed according to the time of failure (i.e., before or after prosthesis seating) and risk factors implicated in the failures. RESULTS: The total rate of failures was 4.8%. Implants 3.75 mm wide and 7 mm long failed at a rate of 9.7%, compared to 6.3% for 3.75 x 10-mm implants. It was found that 54.9% of failures occurred before the prosthesis connection. Finally, 66.7% of all failures were attributed to poor bone quality, 45.4% to the location (maxilla or mandible), 27.2% to occlusal overload, 24.2% to location within the jaw, and 15.1% to infections (an implant could be associated with multiple risk factors). DISCUSSION: The analysis revealed that among the risk factors, poor bone quality in association with short implants seemed to be relevant to failure. The use of implants 4 mm in diameter appeared to minimize failure in these situations. The 3.75 x 7-mm implant presented the highest failure rate (9.7%) of 1894 implants analyzed (excluding implant designs with higher failure rates but few total implants). CONCLUSION: Short implants should be considered as an alternative to advanced bone augmentation surgeries, since surgeries can involve higher morbidity, require extended clinical periods, and involve higher costs to the patient.

Alveolar Process↗
PubMed2006

Cockayne's syndrome: a case report. Literature review.

Cockayne s syndrome is a genetic disorder with a recessive autosomal inheritance, described first by Cockayne in 1936. Patients with this syndrome present failure to thrive, short stature, premature aging, neurological alterations, photosensitivity, delayed eruption of the primary teeth, congenitally absent of some permanent teeth, partial macrodontia, atrophy of the alveolar process and caries. It could be caused by two gene mutations, CNK1 (ERCC8) and ERCC6, located on the 5 and 10 chromosomes respectively, causing two variations of Cockayne s syndrome, CS-A, secondary to a ERCC8 mutation and CS-B with ERCC6 mutation, the last one causes hypersensitivity to the ultraviolet light secondary to a DNA repair defect. The syndrome is also associated with mutations of the XPB, XPD and XPG genes. In this report we present a 9 year and 4 month old patient. He had a height of 94 cm, weight of 8.6 Kg, head circumference of 42 cm. and blood pressure of 120/80. Cachectic habitus, kyphosis, microcephaly, oval face, sunken eyes, a thin and beaklike nose, lack of subcutaneous facial fat (especially in the middle of the face), and large ears give the patient a birdlike appearance. It is notorious the photosensitivity in all the sun-exposed skin. The patient also displays delayed psychomotor skills and mental retardation. In the oral cavity we found deficient hygiene, gingivitis, cervical caries, enamel hipoplasia, abnormal position of the upper and inferior lateral incisors, macrodontia of the upper central teeth, the left one presented a caries. In the x-ray we observed congenital absence of 14, 23 and 24 teeth and mandibular hipoplasia. The aim of this review is to show the dentistry community the characteristics of the Cockayne s syndrome by means of a clinical case.

Child↗
PubMed2006

Analysis of facial skeleton shape in patients with complete unilateral cleft lip and palate: geometric morphometry.

The study is based on a longitudinal cephalometric follow-up of X-ray films of patients with a complete unilateral cleft lip and palate during puberty. Carthesian x, y coordinates of the total of 22 landmarks on the lateral films of 25 patients with the same diagnosis and therapy were established, which served as outcome data for shape analysis. The changes in facial shape experienced by patients between their 10th and 15th year were evaluated by the thin-plate splines (TPS) method. We used the TPS method to find a function which transforms the shape of the face at the age of 10 as well as the square TPS grid into the facial shape at the age of 15 years with the deformed TPS grid. With the help of Geometric PCA for Bookstein's coordinates we found individuals with different shapes who develop abnormally during puberty and whose development is not well predictable. During puberty the face becomes relatively elongated. The most pronounced deformation is caused by the shift of the first permanent molar anteriorly, or a relative shortening of the frontal part of the dental arch. In the anterior direction the position of landmarks changed only in the area of nose; the alveolar process shows retrusion. The position of the mandible in relation to the maxilla change mainly in the inferior direction; the mandibular angle shifts posteriorly. The shape of skeletal profile was compared with a group of patients with the same diagnosis who underwent different therapy.

Adolescent↗
PubMed2006

[The mechanical force analysis of cleft maxillary three dimensional finite element models after alveolar bone graft].

To investigate the biomechanical influences on two different cleft maxillary 3D finite element models pre- and post-alveolar bone graft, we developed a cleft palate bony model from a 17 year cleft palate male CT scan data and built an alveolar bone-grafted cleft maxillary 3D finite element model through gluing the graft model. Apply vector lip force on the anterior face of the models. Study the press (including S3 principal, S1 principal, von Mises and shear) distribution properties and localized area. The results suggested that the press principal spreads along the alveolar ridge and formed several focused areas. After bone grafted, the shear stress tends to be evenly. The grafted alveolar could resist the medially deformation of alveolar crest and the shear stress to the nasal base bony structure. The conclusions from results demonstrated that the deformation of alveolar ridge is possibly due to the lip pressure after the lip repair. The shear stress along the alveolar ridge could cause the severity of the dentition. The grafted bony structure could even the shear stress distribution evenly other than the distribution properties.

Adolescent↗
PubMed1991

Craniofacial morphology in unilateral cleft lip and palate in adults.

X-ray measurements were used for studies of craniofacial morphology in unilateral (right-sided) cleft lip and palate in 58 adult males operated upon with the same technique. The results obtained showed a slightly smaller neurocranium without marked changes of the cranial base. Basic facial skeletal deviations included a shortening of maxillary depth, reduction of the upper face height, widening of some maxillary dimensions (interorbital and of nasal cavity), retroinclination of upper incisors and alveolar process and mandibular changes resulting from growth deficiency (they consisted of shortening of the body and ramus, elongation of anterior mandibular height, obtuse gonial angle, acute chin angle, steeper slope of the body, retroinclination of incisors and retrognathia). Described changes caused an impairment of sagittal and vertical jaw relations, anterior crossbite, flattening of the face and a limitation of its anterior growth rotation. There was also a displacement of the whole maxilla backwards and a reduction of the height and of the thickness of the upper lip (increasing retrocheilia). The elongation of the lower face and thus of the whole face was produced by the increase of the anterior height of the mandible, impaired overjet and by maxillary dentoalveolar retroinclination. A slight transversal flattening of the face (greater retrusion in the centre than in the zygomatic regions) was present as well.

Adult↗
PubMed1976

[Extension implantations as an aid in defect-restoring prosthodontics].

Because of a lack of denture retention, great difficulties are often encountered in edentulous patients who require prosthetic treatment of defects in the maxillo-facial region. The use of enossal implants may enable temporary rehabilitation with regard to mastication and speech. The possible range of indication is considerably limited in cases of extensive defects of the alveolar process, advanced atrophy and by radiological therapy of malignant tumors. The duration of therapeutic success is contingent upon most accurate implantation techniques and prosthetic treatment as well as the patient's oral hygiene.

Aged↗
PubMed1990

[Congenital granular-cell tumor].

Tumour consisting of nodes (15 x 10 x 8 mm, 2 cm and 0.3 cm in size) on the alveolar processes of the maxilla and mandibula is found in a newborn. Histological diagnosis is granular-cell myoblastoma.

Humans↗