ABSTRACT
Several different methods of file sterilization were analyzed to determine the best method of providing complete file sterility, including the metal shaft and plastic handle. Six test groups of 15 files were studied using Bacillus stearothermophilus as the test organism. Groups were "sterilized" by glutaraldehyde immersion, steam autoclaving, and various techniques of salt sterilization. Only proper steam autoclaving reliably produced completely sterile instruments. Salt sterilization and glutaraldehyde solutions may not be adequate sterilization methods for endodontic hand files and should not be relied on to provide completely sterile instruments.
Subject(s)
Dental Instruments , Infection Control, Dental/methods , Root Canal Preparation/instrumentation , Sodium Chloride , Sterilization/methods , Colony Count, Microbial , Evaluation Studies as Topic , Geobacillus stearothermophilus/growth & development , Glutaral , Hot Temperature , Steam , Sterilization/instrumentationABSTRACT
This article reports 31 cases of intentional replantation with an overall success rate of 80.6% with six recorded failures. Survival times varied from 1 day to 22 years. A second mandibular molar that failed after 3 weeks was replanted successfully a second time with no signs of failure after a 46-month follow-up period. Two cases of intentional replantation of deciduous molars are also reported. We suggest that intentional replantation reduces adverse outcomes and should be considered as another treatment modality and not as a procedure of last resort. This procedure is recommended as the treatment of choice in the following instances: for lower second molars, for single-rooted teeth, and lower first molars when there is difficulty in accessibility to perform apical surgery; when the mental foramen is superimposed over the apex of the premolars; when the molar apex is in proximity to the mandibular canal; when patients object to periradicular surgery; when failures occur after apical surgery, or when surgery would create a periodontal pocket as a result of extensive bone removal. Periradicular surgery with a retroseal is more advantageous for first molars when roots are more curved, widespread, and are more prone to fracture compared with second molars whose roots are more tapered and close together.
Subject(s)
Root Canal Therapy/methods , Tooth Replantation , Contraindications , Humans , Reoperation , Root Canal Therapy/adverse effects , Tooth Extraction , Tooth Replantation/methods , Treatment Failure , Treatment OutcomeSubject(s)
Dental Arch , Periapical Diseases/surgery , Root Canal Therapy/methods , Adult , Aged , Bicuspid , Female , Humans , Male , Middle Aged , Molar , Tooth Fractures/surgery , Tooth Replantation , Tooth Root/injuriesSubject(s)
Dental Fistula/surgery , Periapical Diseases/surgery , Root Canal Therapy/methods , Adult , Female , Gingiva/surgery , Humans , Male , Post and Core Technique , Tooth Root/surgerySubject(s)
Molar/surgery , Tooth Replantation/methods , Adult , Dental Pulp Necrosis/therapy , Female , Humans , Root Canal TherapyABSTRACT
This study showed that the excised periodontal ligament from humans and hamsters actively synthesizes protein, as measured by 14C-proline incorporation, when incubated in vitro for periods of 30 minutes to six hours. However, only a small percentage of the protein synthesized was collagen.
