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At least 325 records · Page 18Linked to original sources
PubMed1994

[Film-less digital x-ray image processing--new prospects with the RadioVisioGraphy equipment].

Due to a new removable and compatible mass storage media, the ultimate model of the RadioVisioGraphy (RVG) system for X-ray recording without films offers an adequate possibility to store images as well as an easy way to transfer these data to other personal computers for digital image processing. By experiment we demonstrated a digital image subtraction procedure with public domain software, simulating a situation before and after apicoectomy. The result shows a good quality with a favourable relation between signal and noise.

Apicoectomy↗
PubMed1995

[Root canal overfilling. Periapical immune reactions].

The authors studied the immunological answer of periapex to look for causes of osteolysis. They did six apicoectomies in teeth with periapical lesions containing extruded material, and found an inflammatory infiltrate of T lymphocytes and macrophages with birifrangent bodies. They suppose that this immunitary answer to extruded material, prevents the periapex cure.

Apicoectomy↗
PubMed1997

[Veterinary dentistry (15). Apex resection in the horse].

Periapical disorders in horses can be treated by resection of the apex. The indications, contraindications, diagnosis, treatment and complications of the intervention are discussed. Four case reports of horses in which apicoectomy with retrograde endodontic treatment was performed are reviewed.

Animals↗
PubMed1994

Anterior apicos in general practice: step-by-step guidelines.

Apicoectomy and retroseal procedures should continue to be a mainstay of dental treatment because not all root canal therapy is successful, even when it is amenable to retreatment. Currently accepted methods for performing this operation have been reviewed. With appropriate case selection and the careful implementation of these techniques, the general dentist can confidently provide this service to patients.

Apicoectomy↗
PubMed1994

Development of a teaching model for surgical endodontic access sites in the dog.

A dolicocephalic canine skull was used to develop a teaching and study model for surgical endodontic access sites of the maxillary and mandibular canine teeth, the maxillary fourth premolar and the mandibular first molar teeth. Coronal endodontic access sites were created, and endodontic files were inserted through the access preparation into the root canal system. The teeth were radiographed to determine the ideal surgical access points. Barium markers were placed over these points and each tooth was radiographed again to confirm the appropriate location of the marker. Surgical accesses to the apices were created by drilling through the barium markers and underlying bone. Following localization of the apices, apicoectomies were performed, exposing the apical portion of the pulp canal. The maxillary and mandibular canine teeth, the maxillary fourth premolar tooth, and the mandibular first molar tooth and surrounding bone were harvested from a similar dolicocephalic dog following euthanasia. The specimens were embedded in methylmethacrylate, sectioned, and mounted on slides to reveal the structures located around the surgical access sites.

Animals↗
PubMed1998

Clinical study of refractory apical periodontitis treated by apicectomy. Part 1. Root canal morphology of resected apex.

The morphology of the root apex was analysed by observation of the anatomy of specimens obtained by apicoectomy in cases of refractory apical periodontitis that did not respond to nonsurgical root canal treatment. Apical ramifications were present in 19 (70%) of the roots, while one were found in the remaining eight (3%) roots. This frequency is far higher than that reported by other investigators, suggesting that there is a close relationship between the anatomical complexity of the root canal and the occurrence of refractory apical periodontitis.

Apicoectomy↗
PubMed2007

Hybrid layer seals the cementum/4-META/MMA-TBB resin interface.

Although 4-META/MMA-TBB resin has adhesive properties to dentin, and has been clinically used for the bonding treatment of vertically fractured roots and apicoectomy, there has not been any investigation on the adhesion of 4-META/MMA-TBB resin to cementum. The purpose of this in vitro study was to evaluate the bonding and the sealing ability of 4-META/MMA-TBB resin to cementum. Bovine root cementum and dentin surfaces were treated with a citric acid and ferric chloride solution, and the 4-META/MMA-TBB resin was applied on the treated surfaces before testing. The microtensile bond strength and the leakage levels obtained for the cementum were almost equal to those for the dentin. In SEM and TEM observations, a hybrid layer approximately 2-3 microm in thickness was observed at the interface between the resin and the cementum. It is concluded that 4-META/MMA-TBB resin adhered to cementum via a hybrid layer on cementum, as previously reported for dentin.

Acid Etching, Dental↗
PubMed1990

[Trauma in the anterior tooth area of the youthful dentition from the surgical viewpoint].

A choice of treatments is available for traumatised anterior teeth. Apicoectomy combined with pin insertion is recommended for fractures of the middle or apical part of the tooth, or in cases of loss of the whole tooth single implants. In many cases which previously did not appear to be amenable to treatment it is today possible to preserve the damaged teeth at least over a longish period.

Child↗
PubMed2005

[Dental injuries due to miniplate osteosynthesis. Classification, treatment management, complications, and prognosis].

BACKGROUND: In spite of a monocortical design, miniplate osteosynthesis can injure dental roots directly as well as damage dental substance indirectly by interrupting the apical blood stream. PURPOSE: The present retrospective study classifies different types of dental root trauma caused by monocortical screws, suggests therapeutic options based on diagnosis, and documents survival probability and prognosis after tooth trauma. PATIENTS AND METHODS: During a period of 11 years, 380 patients with permanent dentition underwent miniplate osteosynthesis for the treatment of mandibular fractures, 29 of whom sustained dental root trauma caused by drilling failure. These patients were clinically and radiographically examined for a follow-up time of not less than 38 months. RESULTS: The 29 patients could be classified into four different types of dental root trauma: 13 pulp injuries above the apical third of the root (type Ia), 6 pulp injuries in the apical third of the root or extradental lesions interrupting the apical blood stream (type Ib), 4 lesions to the central radicular dentin without pulp injury (type II), and 6 lesions to the peripheral radicular dentin and root cementum (type III). Of 13 type Ia injuries, 5 developed apical periodontitis and dilatation of the periodontal space. Therefore one root canal treatment and three apicoectomies were performed. One tooth had to be extracted. Three further type Ia injuries and two type Ib injuries showed root resorptions inducing two root canal treatments. One of six type Ib injuries required root canal treatment because of apical periodontitis. One of four type II injuries caused root resorption not requiring therapy. No relevant, pathological finding could be identified after type III injury. CONCLUSIONS: The type of dental root trauma caused by miniplate osteosynthesis determines therapy, complication rate, and survival of the injured tooth.

Adolescent↗
PubMed1977

Dens in dente: an unusual sequela. Abbreviated case report.

Dens in dente is the result of an invagination of the enamel organ into the developing dental papilla. The full pathologic potential of this lesion is often not fully appreciated. A case is reported in which a cyst resulting from a dens in dente obliterated the maxillary sinus and necessitated root canal therapy and apicoectomies in four adjacent teeth.

Adult↗
PubMed1978

Periodic identical intraoral radiographs. A modified Eggen technique.

A method for obtaining periodic identical radiographs with a modified long-cone paralleling technique is described. The appliance consists of a modified Eggen film positioner and an aiming device fastened to a long cone. There was no fixed connection between the film positioner and the x-ray machine. Radiographs have been obtained from twenty-five patients participating in a long-term study of apicoectomy with retrograde root filling. The intervals between the radiographs ranged from 0 to 12 months. A long-term error and a short-term error of the method were found. The method proved to be accurate and fast compared to those described previously.

Dental Equipment↗
PubMed1982

Intentional replantation of a maxillary molar. A 4-year follow-up.

A 4-year follow-up of a case treated by intentional replantation has been presented. A maxillary molar with a metal core was diagnosed as having acute apical periodontitis, endodontic treatment was determined to be impractical, and the tooth was extracted. Three roots canals which could not be detected roentgenologically were discovered and, after apicoectomy and reversed amalgam filling, the tooth was replanted in its socket. The follow-up reveals periapical repair with no signs of root resorption or ankylosis.

Adult↗
PubMed1985

Inadequate treatment: a pathway to surgery.

A patient developed postendodontic pain 3 years after undergoing root canal therapy in a maxillary first premolar tooth. Radiographic examination revealed that a recently extracted impacted second premolar had originally obscured the x-ray view of a third root on the first premolar. Endodontic therapy in the unfilled root was rejected because the tooth had been restored with full coverage. Apicoectomies and retroseals were performed on all roots, and the tooth became asymptomatic.

Adult↗
PubMed1985

A comparison of the sealing properties of different retrograde techniques: an autoradiographic study.

Single-rooted teeth were instrumented and filled in vitro with a lateral condensation of gutta-percha with sealer. Following obturation, the tooth apices were treated by various retrograde procedures. The teeth were then coated with ethyl acetate, immersed in 45Ca solution, washed, and sectioned, and autoradiographs were used to compare the leakage of the various techniques. Statistical analysis indicated that lateral condensation produced a significantly better seal than any retrograde technique tested except retrofilling with Super EBA cement and that a significantly worse seal was obtained with amalgam retrofill when compared to all retrograde techniques except cold-burnished gutta-percha following apicoectomy. No significant difference existed between other group combinations.

Aluminum Oxide↗
PubMed1988

Undiagnosed benign cementoblastoma in a patient with a 6-year pain condition. Report of a case.

Symptoms in the lower first molar developed in a 15-year-old girl. The problems started with tenderness during occlusion. The first radiographic examination revealed a radiopacity at the distal root, which was considered in the radiographic report to be a cementoma. Therapy commenced with occlusal adjustment, but this was followed 20 months later by endodontic therapy, which was undertaken because of the suspicion of partial pulpal necrosis with condensing osteitis. A painful condition developed and led first to apicoectomy and then to extraction 2 1/2 years after the start of the endodontic therapy. Light microscopic examination of adjacent hard tissue revealed signs of chronic inflammation on both occasions, and a diagnosis of diffuse sclerosing osteomyelitis was made. The pain was not relieved but remained at a tolerable level for 18 months. Then a reexamination of the first radiographs led to a strong suspicion of a benign cementoblastoma. A thorough third operation revealed a small piece of hard tissue in a lacuna of the lingual part of the mandible covered buccally by granulation tissue and inflammatory affected bone. The final histopathologic diagnosis was benign cementoblastoma combined with chronic inflammation.

Adolescent↗
PubMed1993

Is phantom tooth pain a deafferentation (neuropathic) syndrome? Part I: Evidence derived from pathophysiology and treatment.

Phantom tooth pain is a syndrome of persistent pain or paresthesia in teeth and other oral tissues that may follow dental or surgical procedures such as pulp extirpation, apicoectomy, tooth extractions, or exenteration of the contents of the maxillary antrum. It can also occur when nerves are injured after trauma to the face or even after routine inferior alveolar nerve blocks if the needle pierces the nerve sheath. In the case of tooth extraction, the pain is found in the edentate area. After periodontal surgery, pain or paresthesia is located in the gingiva. The incidence of phantom tooth pain after extirpation may be as high as 3% of cases. Clinically, phantom tooth pain is similar in many essential characteristics to deafferentation pain syndromes also known as phantom pain syndromes. A limitation to this taxonomy is the lack of definitive information with respect to the pathophysiology of deafferentation pain in the trigeminal nerve. This article amplifies previous clinical descriptions of phantom tooth pain. Current concepts in the pathophysiology of neuropathic pain are reviewed as they pertain to phantom tooth pain. Treatments are described that use three routes of drug administration: oral, nerve blocks by injections, and intranasal applications. Reasons are discussed for the high rates of morbidity after dental and neurosurgery in attempts to treat phantom tooth pain.

Afferent Pathways↗
PubMed1994

Bacteria invading periapical cementum.

The aim of this study was to determine whether microorganisms invade periapical cementum of human teeth from the adjacent periapical lesions. We therefore attempted to isolate microorganisms from periapical cementum through the adoption of standard anaerobic procedures for obligate anaerobes. Samples of cementum were taken from 10 amputated tooth roots at the time of apicoectomy. From two of these samples, bacteria were recovered after anaerobic incubation, but no bacteria were recovered after aerobic incubation of the same samples. Of a total of eight isolates from the cementum, seven were obligate anaerobes and one was aerotolerant. The obligate anaerobes isolated were assigned to the genera Prevotella, Peptostreptococcus, Eubacterium, and Fusobacterium. The aerotolerant anaerobe was Campylobacter. From this, we conclude that bacteria can successfully invade cementum via periapical periodontal tissue, and that such bacteria may play a significant role in chronic periapical pathosis.

Actinomyces↗
PubMed1993

Periodontal tissue regeneration including cementogenesis adjacent to dentin-bonded retrograde composite fillings in humans.

The roots of two incisors were treated by apicoectomy and a retrograde dentin-bonded composite filling. Periapical healing was observed a few months later by radiography. Later, due to root fracture and marginal bone resorption, the apical parts were removed including adjacent periapical bone. A histological and scanning electron microscopic examination of the tissue showed reformation of periodontium adjacent to the composite, including reformation of a lamina dura, inserting Sharpey's fibers and cementum deposited in intimate contact with the composite. This finding is in agreement with previous observations of tissue surrounding retrograde dentin-bonded composite fillings placed in monkeys, indicating that tissue regeneration including cementogenesis may occur on composite material and consequently form a biological closure of the root canal.

Adult↗