Abstract
Aim: Evaluation of stresses induced on over-denture abutments endodonticaly treated with two different obturation techniques.Materials and methods: eight mandibular permanent canines were inserted in four pesudo-realistic models. In each model two canines were placed in it. One canine was treated with lateral obturation technique and the other canine with vertical obturation technique. Four over-denture prostheses were fabricated on the four models. Then strain gauges were attached on the coronal one third of the root buccally and lingually for all eight canines. A metal rod was placed occlusally on the premolar –molar area, and a 50 N load was applied on the middle of the rod using the universal testing machine. Readings were collected. Results: from the collected data the lateral obturation showed 85.25±104.901 µε and the vertical obturation showed 4.875±3.555 µε with significance difference of P<0.05 between the groups.Conclusion: it can be concluded that the abutments treated with vertical obturation techniques reduced the stresses induced to the supporting structures when compared with the lateral condensation technique.
Highlights
Over-denture is one of the basis treatment options, over-dentures can be either tooth supported or implant supported
It can be concluded that the abutments treated with vertical obturation techniques reduced the stresses induced to the supporting structures when compared with the lateral condensation technique
Statistical analysis showed that strain induced within teeth obturated using lateral condensation technique was significantly higher than strain induced in teeth obturated by vertical compaction
Summary
Over-denture is one of the basis treatment options, over-dentures can be either tooth supported or implant supported. Two abutments bilaterally positioned are indicated in the conventional over-denture and the abutments are prepared to be 2-3mm from the gingival level In this type of over-dentures endodontic treatment for the abutments are required. Abutments with metal coping showed high susceptibility of gingival inflammation, and root caries, percentage of metal copings loss were high, the incident of the mobility of the abutments recorded was low ELSHERBINI2, CHABARA et al 3. Another form is the over-denture retained with attachments; numerous attachments have been used with varying success rates, some have proved high performers and improved patients’ quality of life. In a systematic review of implants, the use of different attachments designs in over-dentures didn’t seem to have an effect on the marginal bone loss around the abutments CEHERLI et al.[6]
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