Muhammad Rizwan Memon, Fazal Ghani.
Reasons and problems in dislodged metal ceramic fixed partial dentures presented for re-cementation by patients.
J Pak Dent Assoc Jan ;16(1):13-9.

OBJECTIVE: To report reasons and problems seen in dislodged metal ceramic fixed partial dentures (FPDs), presenfed for re-cementation at the Department of Prosthodontics, Khyber College of Dentistry Peshawar, Pakistan. SUBJECTS AND METHODS: Using a structured proforma, over a period of one year (Oct 2005-Sep: 2006), data relating to 46 dislodged FPDs of patients were recorded. These included a history of placement of FPD, reasons for consulfation and habits as well as age, gender and other social demographic data. Detailed oral examination, as well as examination of the dislodged FPDs was carried out to record information relating to arch, site, number of units, ponfics and refainers. The reasons of dislodgement and length of FPD in service were also ascertained. RESULTS: The proportions of dislodged FPDs were 60.8% in maxillary and 39.1% in the mandibular arch. Majority of FPDs (60.8%) were dislodged in the posterior side, some 30.4% of dislodged FPDs had remained in service for less than one year, where 30.4% had been in service from one to two years and 39.1% for more than two years. The proportions of FPDs that dislodged during normal chewing function were 56.5% as compared to 43.5% that dislodged either as a result of trauma, mouth cleaning or need for endo treatment of abutments. More than one reason/problem was seen in each case of dislodged FPDs in the form of defective margin in 34 cases, unsatisfactory oral hygiene in 30 cases and over-tapered preparation in 28 cases. The numbers and severity of problems seen were more in the dislodged FPDs that had rendered a service life more than two years. CONCLUSION: Within the limitations of this study, it can concluded that irrespective of the reasons and problems, maxillary FPDs would have a greater tendency for dislodgement and that defective margins, over-tapered preparations and unsatisfactory oral hygiene were the predominant reasons for FPD dislodgement.

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