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At least 883 records · Page 49Linked to original sources
PubMed1988

Autogenic tooth transplantation: a report of ten cases.

Modifications in the surgical procedure for transplantation of the unerupted mandibular third molar to the first molar socket are presented, and the clinical and radiographic data on ten cases with a 3-year follow-up are described. The proposed method of treatment makes it possible to stabilize the transplant without a splint by using a suture crossed over the occlusal surface of the tooth.

Adolescent↗
PubMed1993

The reinnervation of healing extraction sockets in the ferret.

The objective of this study was to describe the pattern of healing of pulpal and periodontal nerve fibers following tooth extraction. The mandibular canine teeth were, under general anesthesia, removed from one side of nine young ferrets. One week (two animals), one month (four animals), and three months (three animals) later, again under general anesthesia, the animals were perfused with fixative. The mandibles were decalcified, paraffin-embedded, and serially sectioned. Sample sections were stained with hematoxylin and eosin, the remainder with a silver stain for nerves. Serial reconstructions were made of the innervation in control teeth and in the extraction sockets. A grid sampling technique was used for the estimation of the innervation density in different regions at various levels in the healing socket. One week after extraction, although osteoid material was beginning to fill the socket, the pattern of innervation remained similar to that of controls in being restricted to the former location of the periodontal ligament and being densest in the apical third of the socket. One month after extraction, the innervation consisted of many fine axons or small bundles distributed throughout the healing osteoid tissue though still most dense in the periphery of the socket. The overall innervation density increased between one week and one month post-extraction. At three months, as the margins of the socket were becoming obscured, the innervation consisted largely of one or two organized nerve trunks running from the apical to the coronal aspect in either the central or lateral aspects of the socket. At no time was there evidence of neuroma formation.

Alveolar Process↗
PubMed1997

Custom-made root analogue titanium implants placed into extraction sockets. An experimental study in monkeys.

The aim of this investigation was to evaluate clinically and histologically a new custom-made, root analogue titanium implant placed into extraction sockets in monkeys (Macaca fascicularis). Three adult monkeys were used in this investigation. After raising full thickness flaps on the buccal and lingual side, the upper central and lateral incisors were extracted. Each tooth root was machine copied to 1 titanium analogue using a new CAD/CAM-system. The implants were installed in the respective extraction sockets and the flaps sutured back. After 6 months of healing biopsies were taken and processed according to the cutting-grinding technique. The percentage of mineralized bone-to-implant contact was measured as a fraction of the rough implant surface using computer-assisted analysis. The main clinical problem that occurred during implant placement was the fracture of the buccal alveolar wall. The histometric evaluation showed a mean mineralized bone-to-implant contact of 41.2 +/- 20.6%. In this investigation it could be shown that implants fabricated by laser copying will osseointegrate. The presented data encourage the performance of clinical and experimental trials evaluating the new system utilizing improved second generation CAD/CAM equipment. Such studies are currently underway.

Animals↗
PubMed2006

Patients presenting to the general practitioner with pain of dental origin.

Dentofacial pain is a common presentation in general practice, and more than 50% of cases arise from dentally related pathology. In a carious tooth, pain that is site-specific, severe and spontaneous usually denotes extension of caries into the tooth pulp. Caries does not always appear as a cavity in the tooth, but may lie beneath intact enamel or on surfaces between teeth. Examination of tooth pain should include firm percussion (eg, with a tongue depressor). Tenderness on percussion denotes progression of infection into the subdental tissue. Pain occurring 24-48 hours after a tooth extraction is commonly caused by superficial osteitis in the exposed alveolar bone. Examination will reveal the absence of a blood clot in the extraction socket and severe tenderness on local palpation. Severe pain related to impacted wisdom teeth is frequently caused by pericoronitis, an infection in the gingival tissues surrounding the tooth. The surrounding gingiva is erythematous and tender to palpation. Localised facial swellings of dental origin require immediate referral to a dentist. Progressive facial swelling requires aggressive antibiotic therapy and referral to hospital for definitive management.

Adult↗
PubMed1992

The periodontal differentiation in the phylogeny of teeth--an overview.

During the evolution of teeth, different types of periodontal attachment have been developed. On the basis of the comparative histology of periodontal tissues, protoacrodontal, acrodontal, acro-protothecodontal, pleurodontal and thecodontal structures can be distinguished that depend upon the area of attachment (crestal, marginal or socketed type) and the mode of attachment (ankylosis, fibrous or combined type). Due to "phylogenetic memory", changes of the periodontium in health and disease could be interpreted as copies of phylogenetically older patterns. The greatest variations in tooth attachment have originated in acrodont bony fishes and in pleurodont reptiles, whereas the selection for a single thecodont or socketed type was an important event in the evolution of mammals. The detailed structures of cementum, of the fiber apparatus and of the junctional epithelium vary from type to type and within one type. These principal structures are decisive for reaction patterns of degeneration and regeneration. Therefore, comparative periodontology could be an important adjunct to help interpret the natural history of periodontal diseases, to help in the selection of experimental animals and to help provide treatment strategies in both human and veterinary situations.

Animals↗
PubMed1996

Bilateral block: is it safe and more efficient during removal of third molars?

OBJECTIVE- to assess the safety, acceptability, and efficacy of removing bilaterally impacted wisdom teeth as a one-stage rather than a two-stage procedure. DESIGN- randomised controlled trial. Setting - district hospital. SUBJECTS- 100 consecutive patients who required removal of bilaterally impacted third molars. INTERVENTIONS- 50 patients were randomised to have the teeth removed in two stages, 3-4 weeks apart, the other 50 to have the teeth removed at one visit. All operations were done under local anaesthetic (2% lignocaine and 1/80 000 adrenaline) and intravenous midazolam 0.07-0.13 mg/kg titrated against sedative effect individually. Main outcome measures - morbidity, time off work, anxiety scores (assessed by visual analogue scale), and patient opinions. RESULTS- 5 patients were withdrawn because they were not given the randomised treatment, and 10 were lost to follow-up, leaving 40 in the two-stage group and 45 in the one-stage group for analysis. Two patients in the one stage group developed SaO2 of less than 90% which was corrected by deep breathing, and another had a temporary parasthesia of the inferior alveolar nerve that resolved within a week. One patient in the two stage group had a haemorrhage after the first stage that required packing of the socket in the emergency department, and this patient refused to have the second tooth removed. The mean number of days taken off work was significantly less in the one stage group (mean 3 days compared with 5 days (P < 0.005), and the anxiety scores did not differ significantly between the two groups. A quarter of the patients in the two-stage group would have preferred a one-stage procedure, but none in the one-stage group would have preferred a two-stage operation. CONCLUSIONS- removal of bilaterally impacted wisdom teeth under local anaesthesia and sedation in one session is safe, cost effective and acceptable to patients.

Absenteeism↗
PubMed1977

Biocompatibility of polysulfone composite materials for dental implant.

As a part of the work designed to find a material suitable for a dental implant, tissue reaction of various kinds of polysulfone composite materials has first been studied by implantation in the femur of rats and in the mandible of rabbits. Histological examination showed that the porous polysulfone composite containing 20 wt.% of tricalcium phosphate exhibited a favorable osteogenesis. The tooth replica implants made of this composite material were inserted into the extraction sockets of dogs. During 5.5 months of observation, horizontal or diagonal orientation of periodontal fibers, no epithelization, and no alveolar bone resorption were noted. This study suggests a promising feasibility of the polysulfone-calcium phosphate composite material as a dental implant material.

Animals↗
PubMed1994

Spontaneous in situ gingival augmentation.

A technique to increase the quantity of gingival tissue around a tooth scheduled for extraction is described. When the tooth is reduced subgingivally, the body will spontaneously produce sufficient amounts of tissue to completely cover the condemned root, thereby simplifying the implant-or socket-retention procedure.

Dental Implantation, Endosseous↗