Implant and root supported overdentures - a literature review and some data on bone loss in edentulous jaws

Abstract

PURPOSETo present a literature review on implant overdentures after a brief survey of bone loss after extraction of all teeth.MATERIALS AND METHODSPapers on alveolar bone loss and implant overdentures have been studied for a narrative review.RESULTSBone loss of the alveolar process after tooth extraction occurs with great individual variation, impossible to predict at the time of extraction. The simplest way to prevent bone loss is to avoid extraction of all teeth. To keep a few teeth and use them or their roots for a tooth or root-supported overdenture substantially reduces bone loss. Jaws with implant-supported prostheses show less bone loss than jaws with conventional dentures. Mandibular 2-implant overdentures provide patients with better outcomes than do conventional dentures, regarding satisfaction, chewing ability and oral-health-related quality of life. There is no strong evidence for the superiority of one overdenture retention-system over the others regarding patient satisfaction, survival, peri-implant bone loss and relevant clinical factors. Mandibular single midline implant overdentures have shown promising results but long-term results are not yet available. For a maxillary overdenture 4 to 6 implants splinted with a bar provide high survival both for implants and overdenture.CONCLUSIONIn edentulous mandibles, 2-implant overdentures provide excellent long-term success and survival, including patient satisfaction and improved oral functions. To further reduce the costs a single midline implant overdenture can be a promising option. In the maxilla, overdentures supported on 4 to 6 implants splinted with a bar have demonstrated good functional results.

Di̇ş Üstü Protezlerde Schubi̇ger Ataşman Di̇zayninin Modi̇fi̇ye Kullanimi: Olgu Sunumu

“…Kimi ekonomik durumu yeterli olan hastanın ise; ileri cerrahi yöntemler olmaksızın implant destekli sabit protetik restorasyon uygulamayı müm-kün kılacak derecede kemik doku desteği bulunmayabilmektedir. 7 Bu yüzden, implant üstü sabit protetik restorasyonlarla tedavi edilebilecek genç bir hastayı, o an için ekonomik durumunun elvermemesi sebebi ile klinik kron boyları uzamış destek dişlerini üzerine gelecek yatay kuvvetlerle kısa zamanda kaybedebileceği hareketli bölümlü protez ile veya estetik kaygılardan ötürü kalan dişlerin çekimini takiben tam protez uygulamaları yerine, diş üstü protez ile tedavi edilmesi daha uygun olacaktır. Böylece, destek dişler etrafındaki kemik doku korunarak hastanın ekonomik durumunun yeterli olduğu durumda implant destekli sabit restorasyon uygulaması herhangi bir ileri cerrahi tekniği ile kemik ogmentasyonu gerekmeyecektir.…”

“…5,6 Kök üzerinden destek alan basit başlıklar hastalar tarafın-dan maliyet açısından her ne kadar prefabrik tutucu ataşmanlara göre daha fazla tercih edilse de, uzun dönemde hasta konforu ve memnuniyeti açısından prefabrike ataşmanlar avantaj sağlamaktadır. 7 Buna rağmen, prefabrike ataşman maliyetini karşılayama-yacak hastalarda maliyet performansı daha uygun olabilecek şekilde modifiye edilerek dökümden elde edilmesi mümkün olabilir. 8 Schubiger ataşman destek dişe vida sistemi ile bağlanan, tam protezin tutuculuk ve desteğini bu destek dişler arasında konumlandırılmış bar tutucular ile sağlayan bir dizayndır.…”

Functional Impressions in Complete Denture and Overdenture Treatment

“…Since more than 10% of patients do not wear their complete dentures, the remaining teeth have an important role for denture retention and stability. They are used as abutment teeth for retention elements (conical and telescopic crowns, ball attachments, bars, locators) (5)(6)(7)(8).…”

“…nondisplaceable mucosa when in function. This creates a valve effect and good denture retention and stability (1,5,8,12). Functional impression for overdentures also determines relationships between retention attachments on the remaining teeth or implants, and therefore it is called fixation functional impression (5,(11)(12)(13)(14)(15)(16)(17)(18)(19).…”

Attitude of accepting dental implant treatment among aged patients

“…Two-or even one-implant overdenture for the edentulous mandible is regarded as a minimum standard of care in many developed countries [7,8] and implant-supported denture is the appropriate treatment of mature patients becoming edentulous [9]. There is sufficient evidence to affirm that the mandibular implant overdenture is a well-established treatment modality, in nondependent edentulous individuals [10], but indication of implant-supported dentures is questionable for patients who have become dependent on others for daily oral health care.…”