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At least 559 records · Page 31Linked to original sources
PubMed1996

Wound healing after mucoperiosteal surgery in the cat.

The purpose of this study was to examine possible tissue-dependent differences in rate of healing after mucogingival flap surgery. After intrasulcular incision and a vertical-releasing incision distal to the maxillary and mandibular cuspids, buccal, full-thickness mucogingival flaps were raised in four quadrants of 10 adult cats. The triangular flaps were left open for 30 min and then repositioned and sutured. Tissue reactions were studied histologically after 1, 3, 7, 14, and 28 days of healing. Although new collagen occasionally was observed in the wound space in the free gingiva at 3 days, collagenous union between the cut dentogingival fibers and the flap seemed well established at 7 days. Flap reattachment to the denuded cortical bone was seen at 14 days in the region of the attached gingiva. In the region of the alveolar mucosa, however, residual coagulum and inflammatory reaction was present as late as at 28 days in several specimens. These observations indicate a marked difference in rate of healing among the different interfaces involved. These variations seem to be related to variations in size of the resulting wound space when a full-thickness mucoperiosteal flap is readapted over cervical root surfaces, alveolar bone crest, and denuded cortical bone, respectively.

Animals↗
PubMed1998

Effects of resorbable membrane placement and human osteogenic protein-1 on hard tissue healing after periradicular surgery in cats.

Periradicular surgeries were performed on the maxillary cuspid teeth of twelve cats. Before reapproximation of the surgical flaps, eight of the osteotomies were covered with a resorbable membrane and eight were filled with human osteogenic protein-1 (hOP-1) on a collagen carrier. The remaining eight sites received no further treatment and served as controls. The animals were euthanized after 12 wk, and the specimens were examined histomorphometrically for the presence or absence of osseous regeneration, inflammation, and cementum formation on the root ends. The results showed that the sites treated with the membrane exhibited significantly more inflammation adjacent to the resected root ends (p < 0.05), and that the use of the membrane had no statistically significant effect on osseous healing or new cementum formation. The use of hOP-1 was associated with a significant decrease in the thickness of new cementum formed on the resected root ends (p < 0.05), but had no statistically significant effect on osseous healing or degree of inflammation. Based on these results, it seems that neither the use of hOP-1 nor resorbable membranes have a positive effect on periradicular tissue healing in endodontic surgery.

Absorbable Implants↗
PubMed1999

A lesion of endodontic origin misdiagnosed as a globulomaxillary cyst.

This report presents a case of a lesion originating from a pulpless central incisor misdiagnosed as a globulomaxillary cyst. The initial diagnosis of globulomaxillary cyst was made solely from radiographs by observing an almond-shaped radiolucency between the lateral incisor and cuspid. No pulp testing was performed before surgical removal of the lesion. The final diagnosis of an endodontic lesion caused solely by a pulpless central incisor was complicated by the initial lack of a pulpal response from the lateral incisor next to the surgical site. By delaying the start of endodontic treatment, pulp sensibility returned to the lateral incisor and the diagnosis of an endodontic lesion caused only by a pulpless central incisor was confirmed.

Adolescent↗
PubMed1985

The frequency and distribution of skeletal and dental components in Class II orthognathic surgery patients.

In an effort to identify the skeletal and dental relationships of Class II malocclusion, lateral cephalograms of 253 adult orthognathic surgery patients (76 male, 177 female) who had a Class II molar and cuspid relationship were traced. One hundred and four of the subjects had had presurgical orthodontic treatment and 148 had not. The most common combination of variables found in this study population was a retrusive maxilla, protrusive maxillary incisors, protrusive mandibular incisors, a retrusive mandible, and a long lower facial height.

Adolescent↗
PubMed1981

Surgical treatment of juxtaradicular periodontitis.

A retrospective study was performed on surgically treated localized juxtaradicular periodontitis. 23 teeth were operated on during the years 1971-1976. The majority of these (79%) were incisors or cuspids. The most common etiological factor was iatrogenic root perforation. The postoperative healing process was completely successful in 57% of the cases.

Adult↗
PubMed1981

Adenomatoid odontogenic tumor: light and electron microscopic study.

A case of adenomatoid odontogenic tumor involving the right upper cuspid region of a 17-year-old girl is described. In light microscopy, liminal structures and rosette-like structures were found in the parenchyma of the tumor. Electron microscopic observations revealed that the rosette-like structures were less organized than the luminal structures; the luminal structures are supposed to be associated with secretory activities including the formation of calcified material which show the apatite pattern by electron diffraction. The origin and differentiation of cells constituting the tumor are discussed.

Adolescent↗
PubMed1988

The peripheral odontogenic keratocyst.

A case with a firm asymptomatic nodule of 1 cm diameter on the gingiva between the left upper cuspid and first bicuspid is presented. Radiographic examination did not reveal any pathology of the bone in that region. Histologic examination revealed a cyst wall lined by squamous stratified epithelium, characteristic to the lining of an odontogenic keratocyst. It is suggested that the term peripheral odontogenic keratocyst be used for the diagnosis of this lesion.

Adult↗
PubMed1990

Autogenous rib graft for reconstruction of alveolar bone defects in cleft patients. Long-term follow-up results.

In a retrospective study (mean follow-up 76 months), the use of a free autogenous rib graft for reconstruction of anterior residual bone defects in seventeen cleft patients is evaluated on a long term basis. The results show recurrence of a palatal oronasal fistula in 2 out of 17 patients. 6 patients had acceptable results, while 9 had good to excellent scores at all sites. The costal graft material does not prevent permanent upper cuspids from erupting into this bone, after its incorporation. It is concluded that autogenous rib bone is a good material for secondary bone grafting of the residual alveolar and palatal defect in cleft patients.

Alveolar Process↗
PubMed1996

Bone grafting for the alveolar cleft defect.

Seventy-five percent of all cleft lip and palate patients have osseous defects of the alveolus. Bone grafting of this defect normalizes facial and dental function. Failure to reconstruct the osseous deformity may result in oronasal fistula, fluid reflux, speech pathology, anteroposterior deficiency of the maxilla, transverse deficiency of the maxilla, lack of bone support for the incisors and cuspids, dental crowding, and facial asymmetry. Bone grafting unifies the maxilla and is best done after the majority of facial growth is complete and the secondary dentition is erupting. This is known as secondary bone grafting and yields the best results. The dentofacial deformity of cleft lip and palate is best managed by coordination of dental development, surgery and orthodontics.

Adolescent↗
PubMed2002

Exostosis following a free gingival graft.

BACKGROUND: There have been few cases reported of exostoses following a free gingival graft. In 1980, a free gingival graft was placed on the facial level of 33-34, developing over the years a significant enlargement. In 1999, since the patient felt progressively uncomfortable with the enlarged area, its surgical reduction was proposed. METHOD: Under local anesthesia, the hard tissue developed under the previously-grafted area, was significantly reduced. The specimen, together with a fragment of the covering soft tissue, was sent for histological analysis. RESULTS: The surgical wound healed uneventfully, and the patient was satisfied with the results. The histology showed the presence of mature bone surrounded by a dense connective tissue, whereas the gingival tissue showed acanthosis and fibrosis. CONCLUSION: The development of exostoses following a free gingival graft can be considered an unpredictable, albeit infrequent side-effect of this procedure. The fact that most of these exostoses appear in the cuspid-premolar area, deserves further consideration.

Adult↗
PubMed1976

Premolar enucleation.

A study was made on 27 cases where enucleation of four first premolars was performed simultaneously without introduction of mechanical devices to influence space closure. The results suggested that: 1. Enucleation of premolars can be used to minimize the severity of crowding in arch-length deficiency cases. 2. There is no damage to the remaining teeth and alveolar process when enucleation is accomplished with good surgical technique. 3. The average amount of lingual tipping of the mandibular incisors in approximately four years subsequent to the enucleation procedure was 4.1 degrees. 4. This amount of lingual tipping compares quite favorably with the amount of lower incisor uprighting experienced during growth and could not be considered excessive. 5. The mandible does tend to rotate in a counterclockwise manner following enucleation of four first premolars without appliance therapy. This rotation was considered significant in comparison with the amount of rotation that could be expected from an untreated sample. 6. If orthodontic treatment is planned, the enucleation of the manddibular second premolars in borderline extraction cases to avoid excessive lingual tipping of the mandibular incisors would seem to be questionable. 7. Various combinations of enucleation and tooth extraction may be helpful in treatment planning. 8. With judicious timing the enucleation of four first premolars can minimize the severity of the malocclusion simplifying appliance therapy if proper diagnosis and good surgical technique are employed. 9. Although conventional serial extraction may accomplish similar ends, it would appear that enucleation would offer some advantages in terms of autonomous adjustment of the mandibular incisors and root positioning of mandibular cuspids. 10. Enucleation cases usually require fewer traumatic surgical procedures and less supervision by the orthodontist. 11. The parents should be informed that serial extraction procedures including enucleation may simplify but will not eliminate the need for appliance therapy.

Bicuspid↗
PubMed1984

The passive lingual arch in first bicuspid extraction.

The effects of a passive lingual arch on lower incisor and molar positions after extraction of first bicuspids are analyzed. Results indicate that a lingual arch can be effective in maintaining arch length, while still allowing normal changes in incisor, cuspid and second bicuspid positions.

Bicuspid↗
PubMed1985

Stability of dental arch expansion in the deciduous dentition.

Thirteen patients with deciduous dentition and more than 3mm intercuspid arch length deficiency are expanded and followed, with controls, for 6 years. Arch perimeter and width at permanent cuspids and bicuspids appear to be slightly greater, and lower incisors are positioned somewhat more forward on the mandible.

Age Factors↗
PubMed2000

Segmental odontomaxillary dysplasia: a case report and review of the literature.

Segmental odontomaxillary dysplasia (SOD) is a rare, unilateral developmental disorder of the maxilla involving abnormal growth and maturation of the bone, lack of one or both premolars, altered primary molar structure, delayed tooth eruption, and fibrous hyperplasia of the gingiva. In this, the twenty-third reported case of SOD, the literature is reviewed, and the clinical, radiographic, and histopathologic data are described. Computed tomographic scans of this case showed that the involved segment of the maxilla extends mesiodistally from the permanent cuspid to the mesial portion of the first permanent molar, largely limited to the area of the missing premolars. However, the affected bone extends superiorly in the lateral wall of the maxilla to the zygoma and base of the orbit. This article is intended to serve as baseline data for a future article, describing the natural history and possible treatment of SOD, which remain undocumented.

Child↗
PubMed2002

Anterior lingual mandibular salivary gland defect (Stafne defect) presenting as a residual cyst.

Lingual mandibular salivary gland inclusion (Stafne defect) is a developmental anomaly represented by a bone concavity usually containing submandibular gland tissue. The posterior mandible region, particularly at the angle and below the mandibular canal, is the common location, and the anterior mandibular variants occur rather seldom. The latter is usually observed in the premolar and cuspid region, or more rarely in the symphysis, as a round or ovoid radiolucency sometimes appearing superimposed over the teeth's apices, resembling a true cystic lesion or an odontogenic tumor. We report an additional case of anterior lingual mandibular salivary gland defect occurring in a 42-year-old white man. It presented as an asymptomatic radiolucency located on the left side of the mandible, in the region of an absent second premolar and first molar, above the alveolar canal, mimicking a residual cyst. Histopathologic examination of the "cyst" content revealed the absence of a cyst lining and the presence of normal sublingual gland tissue.

Adult↗
PubMed1976

A relation between automorphic forms on GL(2) and GL(3).

Let rho(n) denote the standard n-dimensional representation of GL(n,C) and rho(n) (2) its symmetric square. For each automorphic cuspidal representation pi of GL(2,A) we introduce an Euler product L(s,pi,rho(2) (2)) of degree 3 which we prove is entire. We also prove that there exists an automorphic representation II of GL(3)-"the lift of pi"-with the property that L(s,II,rho(3)) = L(s,pi,rho(2) (2)). Our results confirm conjectures described in a more general context by R. P. Langlands [(1970) Lecture Notes in Mathematics, no. 170 (Springer-Verlag, Berlin-Heidelberg-New York)].

Journal Article↗
PubMed1984

L and epsilon functions for GSp(4) x GL(2).

The construction of L functions for automorphic cuspidal representations of GSp(4, A) x GL(2, A) with a Whittaker model has been given by Novodvorsky [Novodvorsky, M. (1979) Proc. Symp. Pure Math. 33 (2), 87-95]. In this paper, we prove that this L function has nontrivial poles if and only if the representation of GSp(4, A) is a lifting from split O(4). We also introduce a different construction of L functions for GSp(4) x GL(2) that is applicable to representations that do not have a Whittaker model-for instance, those that correspond to holomorphic modular forms. This construction is based on the lifting of these automorphic forms to Sp(4). Lifted forms will have a Whittaker model. This allows us to write integral expressions yielding these L functions.

Journal Article↗
PubMed2001

Early dental caries risk assessment and prevention in pre-school children: evaluation of a new strategy for dental care in a field study.

The aim of the present field study was to evaluate a new strategy for the dental care of pre-school children which includes an early caries risk assessment and early preventive care. One hundred and sixty-seven children were studied from 1 to 6 years of age (intervention group). A group of 125 children from the same clinic (historical control) was used as a comparison group. On the basis of the clinical examinations of the children and the interviews with the parents when the children were 3 years of age, the children in the intervention group were divided into four different risk groups: no (n = 95), low (n = 33), moderate (n = 30), and high caries risk (n = 9). Only 8 of the 95 children who had been placed in the no caries risk group at 3 years of age developed manifest carious lesions in their primary cuspids and molars by 6 years of age. At 6 years of age 81% in the intervention group were free of manifest carious lesions, compared with 55% in the comparison group (P < 0.001). Furthermore, the mean numbers of defs were 0.6 for children in the intervention group and 2.7 in the comparison group. Thus, this field study indicates that early primary prevention (before the onset of caries attack) and a structured and systematic approach to dental care for pre-school children result in good oral health for the children and may be economically profitable for a society with organized public dental service for pre-school children.

Chi-Square Distribution↗