Clinical and laboratory observation of porcelain fused to metal prosthesis in 63 aged patients with loss of teeth / 解放军医学杂志

ABSTRACT

Objective To observe and analyze the clinical and laboratory features of the use of porcelain fused to metal(PFM) prosthesis in aged patients with loss of teeth.Methods The clinical characteristics of 63 aged patients with 138 units of PFM prosthesis were reviewed and analyzed on the fabrication and reparation processes,and all the patients were followed up for 3 months to 1 year.Results All the PFM prosthesis fit well with the abutments without loosening or drop off except 3 patients,in whom the porcelain cracked.The periodontal tissue remained healthy,and patients were satisfactory with the treatment.The requirements and key points of PFM prosthesis(1) there must be 6-7 teeth or dental roots left in different sections of the jaw.Bone absorption around the tooth should be less than half of the root.(2) The restoration of the vertical range must be accurate.(3) Adjust the overall relations of the jaw.(4) Eliminate the early contact points to avoid crack of porcelain.(5) Choose the correct temperature and observe strictly operation protocol according to the characters of the porcelain.Conclusion Porcelain fused to metal prosthesis is a good choice in repairing the defect of dental bodies and dentition in aged patients.