The overall endodontic fill and apical seal achieved using two different obturation methods were compared. Twenty-six adult dog canine teeth were instrumented and obturated using either a warm vertical or heated lateral technique. Zinc oxide-eugenol sealer was applied by paper point in the warm vertical technique and by syringe injection in the heated lateral technique. The cadaver jaws were warmed to 35-37 degrees C (95-98.6 degrees F) during obturation using a circulating warm water bath. Obturation times were recorded and ventrodorsal, lateral, and oblique dental radiographs were taken of all teeth for comparison. Twenty-two of the canine teeth were extracted and an apical dye study was performed using a clearing technique. Apical dye leakage was linearly measured to evaluate the furthest ink penetration into the root canal. Although radiographically the heated lateral method appeared to have a better endodontic fill, there was significantly greater apical dye leakage in teeth obturated with that combination of sealer and gutta percha. There was also extrusion of sealer and root fracture associated with the heated lateral technique. The method of sealer application was different for each technique; this variable should be taken into consideration when interpreting our results, which suggest that the warm vertical compaction technique may provide a better apical seal in canine teeth of dogs in a shorter period of time, with fewer obturation complications when compared to the heated lateral technique.
A two-year old neutered/male cougar (Felis concolor) was presenled because of abnormal eating habits and an irregularity of the mqndibular rightfirst molar thatwas noted by the caretaker. Oral examination and denrtalladiographs showed a lesion consistent with odontoclastic',re.sorption of the mandibular rightfrst molar, and a crcwnfracture and dilaeerated root of the narillary right first incisor Exodontic therapywas performed on both teeth. The caretaker reported no problems associated with the patientb oral cavity I 0-months foll owing treatment J Vet Dent I7(4); I 73-176, 2000, lntroduction Feline odontoclastic resorption, also known as neck lesions, cervical line lesions, cervical erosive lesions, and dental resolptive lesions, is the most common disease of the tooth structure in domestic cats today.r The prevalence of feline odontoclastic resorptive lesions (FORL) ranges from 20 to 67%o depending on the characteristics ofthe population studied.' First reported in the 1920's by Hopewell-Smith, the incidence of FORL has increased since the 1960's, along with certain aspects of feline domestication such as neutering, vaccinations, and diet. 2'3 These lesions are also seen in large exotic (e.g., lions, tigers, leopards), feral, and small exotic cats, although these populations of nondomestic cats have a substantially lowerrate ofFORL formation compared with domestic cats.laThe etiology of FORL remains unknown. Several hypotheses for the causal relationship of factors associated with FORL are currently being studied including: (l) periodontal disease;(2) furcation anatomy of feline teeth; (3) mechanical stress; (4) diet texture and nutrient content; (5) oral acid levels related to diet or vomitus; (6) inegularities of calcium homeostasis; (7) excess vitamin A; and, (8) viral infections.3 Lesions may be multifactorial in origin. Diet may be an important factor since the commercial pet food industry developed concurrent with the incidence of FORL in domestic cats.s The incidence of FORL varies with diet in large zoo cats. NorthAmerican zoo caretakers feed prepared diets to large cats consisting primarily ofground meat with nutritional supplements, while in Europe the diet is composed of large pieces of fibrous meat. Periodontal disease and FORL are common in large cats of North American zoos, whereas these disease processes are rare in large cats in European zoos.6 Anatural, self-cleansing diet fed to large captive cats in Great Britain has been associated with a FORL prevalence of lessthan2Yo.l Additional information is needed to determine the cause of FORL in order to perform measures to prevent these lesions in both domestic and non-domestic cats. Case ReportA2-year-old,46 kg neutered/male cougar (Felis concolor) had been owned illegally and was confiscated by an animal control agency 6-months previously. He was placed in an animal rescue center and was living there at the time of presentation. The cougar's dietatthe rescue centerconsistedprimarily of fresh, whole chickens. The caretaker noticed that the cougar ...
A three-year-old Labrador retriever was referred for decreased appetite, a painful swelling in the region of the maxillary right fourth premolar, and a heart murmur indicative of patent ductus arteriosus (PDA) diagnosed 1.5-weeks prior to presentation. Oral examination and intraoral dental radiographs showed impaction of the maxillary right fourth premolar surrounded by reactive alveolar bone. Necrotic bone, remnants of the deciduous maxillary right fourth premolar, and the impacted permanent maxillary right fourth premolar were removed following surgical exploration of the area. The PDA was repaired without complication 2-weeks following oral surgery. The extraction site was healing appropriately, and the dog's inappetence and painful facial swelling had resolved.
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