Maxillary anterior and mandibular posterior residual ridge resorption in patients wearing a mandibular implant-retained overdenture.

The mandibular implant-retained overdenture could improve masticatory function compared to the conventional complete denture. However, increased forces exerted by the overdenture could increase residual ridge resorption of the maxillary anterior and mandibular posterior areas. The aim of this study was to compare the effect of the mandibular implant-retained overdenture using two or four dental implants, or the conventional complete denture on resorption of the residual ridge of the maxillary anterior and mandibular posterior areas over a period of 10 years. In total, 120 patients, 30 patients treated with an overdenture on two implants (two-implant group), 30 patients with an overdenture on four implants (four-implant group) and 60 patients treated with a conventional full denture (conventional group), participated in this study. On panoramic radiographs, made before and 10 years after treatment, proportional area measurements were applied to determine changes in bone height. After 10 years, a statistically significant amount of bone resorption had occurred in the anterior maxilla in the two-implant group and in the four-implant group. A significant amount of bone resorption had occurred in the posterior mandible in all three groups. There were no statistically significant differences between the groups in both areas. Patients presented large individual differences. It is concluded that patients rehabilitated with implant-retained mandibular overdentures are not subjected to more residual ridge resorption in the anterior maxilla when compared to patients wearing a conventional full denture. Regarding the mandibular posterior residual ridge, resorption was irrespective of wearing an implant-retained mandibular overdenture or a conventional mandibular denture.

[1]  B. Stegenga,et al.  Patient satisfaction and chewing ability with implant-retained mandibular overdentures: a comparison with new complete dentures with or without preprosthetic surgery. , 1995, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[2]  M. Kreisler,et al.  Residual ridge resorption in the edentulous maxilla in patients with implant-supported mandibular overdentures: an 8-year retrospective study. , 2003, The International journal of prosthodontics.

[3]  M. V. van’t Hof,et al.  Implant-retained mandibular overdentures compared with complete dentures; a 5-years' follow-up study of clinical aspects and patient satisfaction. , 1999, Clinical oral implants research.

[4]  I. Blum,et al.  A clinical investigation of the morphological changes in the posterior mandible when implant-retained overdentures are used. , 2004, Clinical oral implants research.

[5]  A Tallgren,et al.  The continuing reduction of the residual alveolar ridges in complete denture wearers: a mixed-longitudinal study covering 25 years. , 2003, The Journal of prosthetic dentistry.

[6]  H. Barber,et al.  Evaluation of anterior maxillary alveolar ridge resorption when opposed by the transmandibular implant. , 1990, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[7]  T. Linkevicius,et al.  Maxillary complete denture outcome with two-implant supported mandibular overdentures. A systematic review. , 2008, Stomatologija.

[8]  M. Quirynen,et al.  Posterior jaw bone resorption in osseointegrated implant-supported overdentures. , 1992, Clinical oral implants research.

[9]  A. Vissink,et al.  Implant-retained maxillary overdentures on milled bar suprastructures: a 10-year follow-up of surgical and prosthetic care and aftercare. , 2009, The International journal of prosthodontics.

[10]  R. H. Batenburg,et al.  Mandibular overdentures supported by two or four endosteal implants. A prospective, comparative study. , 1998, International journal of oral and maxillofacial surgery.

[11]  S. Lechner,et al.  Combination syndrome in relation to osseointegrated implant-supported overdentures: a survey. , 1996, The International journal of prosthodontics.

[12]  A. Slagter,et al.  Bite Forces with Mandibular Implant-retained Overdentures , 1998, Journal of dental research.

[13]  R. M. Watson,et al.  The effects of fixed and removable implant-stabilised prostheses on posterior mandibular residual ridge resorption. , 2002, Clinical oral implants research.

[14]  Ahmed S Assad,et al.  The Effect of Different Mandibular Dentures on Antagonistic Maxillary Ridge , 2007, Implant dentistry.

[15]  R. Jacobs,et al.  Maxillary bone resorption in patients with mandibular implant-supported overdentures or fixed prostheses. , 1993, The Journal of prosthetic dentistry.

[16]  Anita Visser,et al.  Mandibular overdentures supported by two or four endosseous implants: a 10-year clinical trial. , 2009, Clinical oral implants research.

[17]  B. Lang,et al.  LINGUALIZED INTEGRATION: TOOTH MOLDS AND AN OCCLUSAL SCHEME FOR EDENTULOUS IMPLANT PATIENTS , 1992, Implant dentistry.

[18]  R. P. Desjardins,et al.  The maxillary complete denture opposing the mandibular bilateral distal-extension partial denture: treatment considerations. , 1979, The Journal of prosthetic dentistry.

[19]  T. Närhi,et al.  Changes in the edentulous maxilla in persons wearing implant-retained mandibular overdentures. , 2000, The Journal of prosthetic dentistry.

[20]  M. Waas The influence of psychologic factors on patient satisfaction with complete dentures , 1990 .

[21]  M. Kreisler,et al.  A new method for the radiological investigation of residual ridge resorption in the maxilla. , 2000, Dento maxillo facial radiology.

[22]  P. Wright,et al.  Posterior mandibular residual ridge resorption in patients with conventional dentures and implant overdentures. , 2003, The International journal of oral & maxillofacial implants.