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Item does not contain fulltext The dentition of 116 patients with a non-syndromic form of oligodontia was characterized. For this purpose use was made of the so-called Tooth Agenesis Code (TAC), with which the various patterns of missing teeth can be indicated with a unique number. Oligodontia can present itself in very diverse ways. Only 3 patterns were seen (2 times) among these 116 patients. Considered per quadrant, in the upper jaw, on the one hand, agenesis of both premolars and the lateral incisor was most common and, on the other, the absence of all teeth except the central incisor and the first molar. In the lower jaw, agenesis of the second or of both premolars was most common. Evaluating treatments and formulating standards of restoration in the treatment of patients with severe oligodontia are methodological challenges. Homogeneous, comparable sub-groups of patients of any size are difficult to construct due to the low prevalence of severe oligodontia and the diversity of patterns of agenesis when the whole mouth is taken into consideration.

Item does not contain fulltext In clinical practice, the prognosis seems, with some reservations, to be comparable for tooth-implant and implant-implant supported bridges in the middle-long term.This conclusion seems particularly valid for tooth-implant bridges in free-end situations, where a single implant is connected with a tooth. Prerequisites are a healthy tooth abutment, a pontic length not exceeding the width of a bicuspid, a rigid connection between implant and tooth and the use of strong cement.

Item does not contain fulltext Reconstructing defects of the oral cavity or face often poses a significant challenge to the surgeon. Defects of the oral and maxillofacial region can be closed with surgical techniques, with prosthetic constructions, or a combination of these techniques. Both defects of bone, soft tissue and teeth can be reconstructed with these techniques. The aim of reconstructing an oral or facial defect is to obtain optimal function and aesthetics which closely approximate the original form and function. Endosseous implants appear to be useful for retaining prosthetic constructions.

Item does not contain fulltext Following the loss of several molars in the left maxilla, a 73-year-old man asked his general dentist practitioner to restore his chewing efficiency. Initially, reconstruction of the left maxilla with an implant supported fixed partial denture was considered. However, intraorally a soft-tissue swelling was observed extending from the midline of the palate to the left buccal sulcus. A panoramic radiograph showed absence of bone between the oral cavity and the maxillary sinus. At first, after an incision biopsy and histopathologic examination, the condition was diagnosed as nodular fasciitis. However, because of subsequent aggressive growth of the lesion malignancy was suspected. Histopathological examination confirmed the assumption. The lesion appeared to be a sarcoma. The general diagnostic rule is that the aggressive behaviour of a lesion and the absence of a bony delineation on radiographic examination between the oral cavity and the maxillary sinus are signs of malignancy, until evidence to the contrary has been provided.

Item does not contain fulltext A 43-year-old man, known to have hypodontia, was bothered by his over-erupted central incisors. After the placement of implants and the accompanying crown- and bridgework, the central incisors appear to be increasingly over-erupted. The history shows that this phenomenon has already been seen in the past. Three mechanisms can be responsible for the over-eruption, specifically: continuous facial growth, over-eruption of both central incisors in the maxilla as a consequence of agenesis of opposing dentition and relapse of the orthodontic treatment as a result of the fact that orthodontic retention is not readily possible. After the central incisors were first cut in such a way that an acceptable incisal line has again been formed, the single-unit fixed dental prostheses on the front elements were replaced with porcelain ones.

Item does not contain fulltext The importance of the introduction of dental implants can only be understood when the historical context is clarified. In the past, the main treatment carried out by dentists consisted of filling or, in unfortunate cases, removal of painful teeth. Only since the introduction of dental implants did it become feasible to restore dental arches in edentulous patients with complaints about their freestanding prostheses. Initially much scepticism prevailed about dental implants. When titanium with a roughened surface is used, implant success rises above 95%, provided that the implants are placed into sufficient bone volume.

Contains fulltext : 69859.pdf (Publisher’s version ) (Open Access) Cervical external root resorption can be present in natural teeth, involving one or more teeth in the same patient. The incidence of these lesions appears random and the etiology remains unclear. Cervical external root resorption has been considered a difficult clinical situation, and its diagnosis and treatment of the defect challenging. The present report describes a case of multiple external cervical resorption lesions involving four teeth, including the history, and the clinical and radiographic findings. The treatment included surgical intervention and restoration of the defect without sacrificing the pulp. A 3-year re-evaluation of the case confirmed a stable, uneventful clinical recovery. (J. Oral Sci. 50, 487-491, 2008).

Item does not contain fulltext PURPOSE: The purpose of this study was to characterize a population of oligodontia patients and identify patterns of tooth agenesis. MATERIALS AND METHODS: A total of 116 patients with nonsyndromic oligodontia were studied, and the Tooth Agenesis Code (TAC) per quadrant was calculated. Oligodontia was defined as the congenital absence of 6 or more permanent teeth, excluding the third molars. The TAC is a unique number, consistent with a specific pattern of tooth agenesis. The authors suggest the use of an overall TAC with which the dentition throughout the mouth can be presented by a single number. Frequency analysis was used to study the prevalence of various patterns. RESULTS: There was a great diversity of TACs. In the maxilla, agenesis of both premolars and the lateral incisor or the presence of only the central incisor and first molar were the most common patterns. In the mandible, agenesis of the second premolar or both premolars occurred most frequently. CONCLUSIONS: No single pattern of agenesis occurred more than twice when the full mouth was viewed. Hence, the presentation of the dentition in oligodontia is very heterogeneous. Evaluation of treatment strategies in oligodontia patients is a methodologic challenge because homogenous, comparable subgroups of patients are not available.

Item does not contain fulltext Ablative surgery for oral cancer results in loss or alterations of anatomical structures, which may impair oral functions, such as speech, mastication, and swallowing. Oral functions are impaired further by significant side-effects of additional postoperative radiation therapy. Improvement of oral functions may be achieved by implant-supported prosthetic rehabilitation. The recommended treatment is a 4-implants retained overdenture. A fixed 2 unit implant-supported partial denture seems a feasible alternative treatment.