International Journal of Medical and Dental Sciences

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Mapping of Tooth Loss Profiles and the Variety of Removable Partial Denture Designs Fitted to Patients in a University Dental School Clinic in Trinidad


Affiliations
1 Restorative Dentistry, Prosthetics unit, The University of the West Indies, EWMSC, Trinidad and Tobago, West Indies, India
2 Departments of Environmental and Graduate Studies, The University of Trinidad and Tobago, West Indies, India
 

Background: Clinicians are continually challenged to improve the standard of treatment. Careful measurements and designs, based on knowledge of tooth loss patterns and biomechanical principles, will determine the overall quality of removable prostheses.

Objectives: This study maps the pattern of tooth loss in a sample of patients and the most efficient designs employed for their cobalt-chrome removable prosthesis.

Material and methods: Data was collected from gypsum casts, metal castings, and prescriptions sent to dental technicians. The sample included both men (44) and women (109). Information was obtained on their Kennedy classification, number of missing teeth in the maxilla and the mandible, the type of major connector fitted, and when additional indirect retainers with clasps were incorporated into the frame. The significance of the association between pairs of these categorical variables was tested by a Chi Square test.

Results: Patients with maxilla loss (82%) had mostly (54%) 6 to 10 missing teeth and were assessed principally (78%) as exhibiting Kennedy Class II or III patterns. Most (77%) of those missing teeth in their mandible (66%) were assessed as either Class I or Class II. The Anterior-Posterior (70%) in the maxilla and the Lingual Bar (74%) in the mandible were the most common fitted connectors. Indirect retainers were used for patients with maxilla (78%) or mandible (96%) tooth loss to provide extra stability.

Conclusion: Additional components incorporated in the Cobalt-Chrome frame increased the biomechanical efficiency of the appliance by reducing destructive forces, caused by the torque on the abutment teeth.


Keywords

Removable Prosthodontics, Indirect Retainers, Partial Denture Design, Pattern of Tooth Loss, Cobalt-Chrome Dentures.
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  • Pun D K, Waliszewski M P, Waliszeski KJ, Berzins D. Survey of partial dental prosthesis (partial RDP) types in a distinct patient population. J Prosthet Dent 2011; 106:48-56.

  • Curtis DA, Curtis TA, Wagnild GW, Finzen FC. Incidence of various classes of removable partial dentures. J Prosthet Dent 1992;67:664-667.

  • Niarchou AP, Ntala PC, Karamanoli EP, Polyzois GL, Frangou MJ. Partial edentulism and removable partial denture design in a dental school population: a survey in Greece. Gerodontology 2011;28:177-183.

  • Sadiq WM, Idowu AT. Removable partial denture design: a study of a selected population in Saudi Arabia. J Contemp Dent Pract 2002;15:40-53.

  • Al-DwairiZN. Partial edentulism and removable denture construction: a frequency study in Jordanians. Eur J Restor Dent 2006;14:13-17.

  • Preshaw PM, Walls AW, Jakubovics NS, Moynihan PJ, Jepson NJ, Loewy Z. Association of removable partial denture use with oral and systemic health. J Dent 2011;39:711-719.

  • Abuzar MA, Kahwaqi E, Yamakawa T. Investigating oral health-related quality of life and self-perceived satisfaction with partial dentures. J Invest Clin Dent 2012; 3(2):109-117.

  • Inoue M, John MT, Tsukasaki H, Furuyama C, Baba K. Denture quality has a minimal effect on health-related quality of life in patients with removable dentures. J Oral Rehabil 2011;38:818-826.

  • Hummel SK, Wilson MA, Marker VA, Nunn ME. Quality of removable partial dentures worn by the adult US population. J Prosthet Dent 2002;88:37-43.

  • Tuominen R. Clinical quality of removable dentures provided by dentists, denturists and laboratory technicians. J Oral Rehabil 2003;30:347-352.

  • Behr M, Zeman F, Passauer T, Koller M, Hahnel S, Buergers R, Lang R, Handel G, Kolbeck C. Clinical performance of cast clasp-retained removable partial dentures: a retrospective study. Int J Prosthodont 2012;25:138-144.

  • Wostmann B, Budtz-Jorgensen E, Jepson N, Mushimoto E, Palmqvist S, Sofou A, Owall B. Indications for removable partial dentures: a literature review. Int J Prosthodont 2005; 18:139-145.

  • Henderson D, McGivney G, Castleberry D. Removable Partial Prosthodontics. The CV Mosby Company; 1985.p.2-3.

  • Polychronakis N, Sotiriou M, Zissis A. A survey of removable partial denture casts and major connector designs found in commercial laboratories, Athens, Greece. J Prosthodont 2013;22:245-249.

  • McDowell GC, Fisher RL. Force transmission by indirect retainers when unilateral dislodging force is applied. J Prosthet Dent 1982;47:360-365.

  • Sojic LT, MilicLemic A, Tanasic I, Mitrovic N, Milosevic M, Petrovic A. Compressive strain and displacement in a partially dentate lower jaw rehabilitated with two different treatment modalities. Gerontology 2012;29:851-857.

  • Sajjan C. An altered cast procedure to improve tissue support for removable partial dentures. Contemp Clin Dent 2010;2:103-106.

  • Frank RP, Brudvik JS, Noonan CJ. Clinical outcome of the altered cast impression procedure compared with use of a onepiece cast. J Prosthet Dent 2004;91:468476.


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  • Mapping of Tooth Loss Profiles and the Variety of Removable Partial Denture Designs Fitted to Patients in a University Dental School Clinic in Trinidad

Abstract Views: 297  |  PDF Views: 119

Authors

Fiayaz A. Shaama
Restorative Dentistry, Prosthetics unit, The University of the West Indies, EWMSC, Trinidad and Tobago, West Indies, India
Valerie A. Stoute
Departments of Environmental and Graduate Studies, The University of Trinidad and Tobago, West Indies, India

Abstract


Background: Clinicians are continually challenged to improve the standard of treatment. Careful measurements and designs, based on knowledge of tooth loss patterns and biomechanical principles, will determine the overall quality of removable prostheses.

Objectives: This study maps the pattern of tooth loss in a sample of patients and the most efficient designs employed for their cobalt-chrome removable prosthesis.

Material and methods: Data was collected from gypsum casts, metal castings, and prescriptions sent to dental technicians. The sample included both men (44) and women (109). Information was obtained on their Kennedy classification, number of missing teeth in the maxilla and the mandible, the type of major connector fitted, and when additional indirect retainers with clasps were incorporated into the frame. The significance of the association between pairs of these categorical variables was tested by a Chi Square test.

Results: Patients with maxilla loss (82%) had mostly (54%) 6 to 10 missing teeth and were assessed principally (78%) as exhibiting Kennedy Class II or III patterns. Most (77%) of those missing teeth in their mandible (66%) were assessed as either Class I or Class II. The Anterior-Posterior (70%) in the maxilla and the Lingual Bar (74%) in the mandible were the most common fitted connectors. Indirect retainers were used for patients with maxilla (78%) or mandible (96%) tooth loss to provide extra stability.

Conclusion: Additional components incorporated in the Cobalt-Chrome frame increased the biomechanical efficiency of the appliance by reducing destructive forces, caused by the torque on the abutment teeth.


Keywords


Removable Prosthodontics, Indirect Retainers, Partial Denture Design, Pattern of Tooth Loss, Cobalt-Chrome Dentures.

References





DOI: https://doi.org/10.18311/ijmds%2F2014%2F80665