Radiographic marginal bone level evaluation around two different tissue-level implant systems: a one-year prospective study.

BACKGROUND: Marginal bone loss, is a frequently reported variable in the evaluation of dental implants. The primary objective of this study was to evaluate radiographic marginal bone level changes around the two different tissue-level implant systems placed adjacently in the posterior maxilla or mandible. The influence of implant macro-geometry and vertical soft tissue thickness on marginal bone loss were also evaluated. METHODS: Seven patients were included in the study and a total of 18 implants were analyzed. Each patient received two different implants placed adjacently in the maxilla or the mandible. The implants used in our study were either Straumann® SP cylindrical implants or JD Octa® tapered implants. During the surgery, vertical soft-tissue thickness was measured with a periodontal probe placed on the top of the bony crest and in the center of the future implant site. Healing abutments were then seated. Three months following implant placement, impressions were taken, and screw-retained metal ceramic prostheses were delivered. Standardized intraoral radiographs were taken immediately after implant placement and one year following implant loading in order to assess marginal bone level changes. RESULTS: Results showed a mean marginal bone loss of 0.55±0.5 mm for Straumann® SP implants and 0.39±0.49 mm for JD Octa® implants after one year of loading and the difference was not statistically significant between the two systems. A statistically significant correlation was found between soft tissue thickness and marginal bone loss; in sites with thin mucosal tissues (≤2 mm), there was significantly greater bone loss compared to sites with thick, soft tissues (> 2 mm) in both implants. CONCLUSIONS: Radiographic marginal bone loss was not statistically different between the two implant systems at the one-year examination period. Moreover, vertical soft tissue thickness influenced marginal bone loss regardless of the implant system used.

Peripheral ameloblastoma: case report and our experience 20 years.

BACKGROUND AND AIM: The purpose of this study was to determine the clinical and histological features and treatment of peripheral ameloblastoma. Peripheral Ameloblastoma is a rare benign odontogenic tumor that concerns soft tissue and have a typical extraosseous localization. METHODS: Aim of this work is to show its clinical and histological characters, in order to define some useful information for differential diagnosis with other oral neoformations, comparing literature with our data, collected in ten years of clinical activity of Oral and Maxillofacial Surgery Unit of Policlinico Tor Vergata in Rome. RESULTS: Prognosis of PA is certainly favourable, with a restitutio ad integrum close to 100%. In the period between October 2011 and November 2021, we reported 8 diagnoses of P.A. Medium age of the group with diagnosis of PA was 71,4 y with a SD: 3,65. P.A.'s incidence in our sample of patients was 0,26%. CONCLUSIONS: PA is a benign odontogenic tumor that requires a careful diagnosis, a complete surgical eradication and adequate follow up, because malignant evolution is rare but possible.

Combined surgical approach retromandibular and intraoral to subcondylar mandibular fractures.

BACKGROUND: Condylar and subcondylar fractures are very common and account for at least one third of all mandibular fractures. In literature, little agreement exists about the management of extracapsular condylar and subcondylar fractures in adults. Some studies provide better results of occlusion, masticatory function, mouth opening, and bone morphology with surgical treatment. Conversely, other studies report excellent results with conservative treatment avoiding complications such as facial nerve injury and unsightly scar. METHODS: In this study, we report our experience of 25 condylar/subcondylar fractures. We report the case of a man with bilateral subcondylar fractures treated by a double surgical approach, intraoral and retromamdibular. Intraoral approach lets us dissect the masseter and disconnect the temporal muscle tendon, thus favoring further reduction of fracture stumps, whereas retromandibular approach favors a good operative field and the positioning of titanium microplate. RESULTS: Postoperative monitoring reported good results of occlusion. Postoperative computed tomographic scans show the good reduction and positioning of titanium miniplate.

Treatment of N in the upper maxillary tumors.

From 2002 to 2008, 86 patients have undergone surgical treatment of malignant upper maxillary tumors at the Maxillo-Facial Surgery Department, Tor Vergata University, Rome. All the N-positive patients at the time of the T therapy have undergone lymph node surgical emptying. In 6 patients, a laterocervical emptying was performed when laterocervical metastases were found. In the remaining 68 patients, with no evidence of N, we did not perform laterocervical emptying. We found in our patients a high percentage of cervical metastasis in T2 squamous cell carcinoma of the maxilla (32.1%). In this article, the authors present the results of their experience in treating N in upper maxillary tumors. This research study highlights some important aspects that have to be considered. Squamous cell carcinoma of the maxilla extending to the oral cavity (T1-T2) shows a higher laterocervical lymphophily than the superoposterior ones (T3-T4). Presence or appearance of lymph node metastases is a high-malignancy index, with a subsequently very negative prognosis. Considering the large percentage of cervical recurrences in T1-T2 squamous cell carcinoma of the maxilla that spread up in the hard palate mucosa and upper gum and the consequently high morbidity, performing a prophylactic laterocervical emptying in these patients could be advisable. Even in the recent literature, we found opinion in favor of this behavior.

Central giant cell granuloma of the jaws.

Central giant cell granuloma was classified by the World Health Organization in 2005 as a rarely aggressive idiopathic benign intraosseous lesion that occurs almost exclusively in the jaws. It occurs most frequently in young women (aged <30 y). This osteolytic lesion histologically consists of proliferation of fibrous tissue, hemorrhagic focuses, hemosiderin deposits, osteoclast-like giant cells, and reactive bone formation. Differential diagnosis has to be made with other osteolytic neoformations of the jaws, both unicystic and multicystic (odontogenic tumors, fibrous dysplasia, cysts, etc). From 2002 to 2008, we surgically treated 8 cases of giant cell granuloma. Our article focuses on a 59-year-old woman who came to our department with a swelling on the right side of the face. Computed tomography examination showed an osteolytic and expansive neoformation spreading up from the lateral wall of the nose to the anterior wall of maxillary sinus and above up to the inferior margin of the eye socket. Besides, it was contiguous to the canine root apex, the first and second bicuspids. Intraoral incisional biopsy confirmed the histologic picture of central giant cell granuloma. After a few days, she underwent surgical excision of the neoformation, preserving the lateral wall of the nose, the anterior wall of maxillary sinus, the eye socket, and the dental elements, respectively. Results of the histopathologic examination confirmed the previous biopsy. A follow-up at 30 months excluded any relapse.

Aortic arch stabilization in redo operations for aortic type A dissection.

BACKGROUND: In patients undergoing a new surgical procedure after correction of type A dissection, care must be taken to correct as much as possible the residual lesions and to obliterate, if possible, any residual false lumen. METHODS: From November 2003 to May 2004, four patients who previously underwent ascending aortic replacement for acute type A aortic dissection underwent a second procedure because of severe aortic root dilatation. The residual false lumen was limited to the arch in two cases, but extended to the whole thoracic aorta in the other two, going down to the abdominal aorta in one of them. A composite valve conduit was inserted, and then a stent was placed in the dissected aortic arch. RESULTS: All patients had a regular postoperative outcome and were discharged 9-11 days after surgery. The computed tomography angiography scan, performed early and after 6 months, showed no evidence of false lumen in the aortic arch. CONCLUSIONS: The placement of a stent in the aortic arch in redo cases can be performed with satisfying results because it causes the disappearance of the false lumen. Long-term follow-up is required for the confirmation of these initial positive results.