Leonard Mueninghoff

Oregon Health and Science University, Portland, OR, United States

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Publications (4)4.91 Total impact

  • Alberto J Ambard, Leonard Mueninghoff
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    ABSTRACT: Calcium phosphate cement is a bioactive and biodegradable grafting material in the form of powder and liquid, which when mixed, sets as primarily hydroxyapatite, sometimes mixed with unreacted particles and other phases. This material has been extensively investigated due to its excellent biological properties, potential resorbability, molding capabilities, and easy manipulation. Because the material can potentially be replaced with bone after a period of time, it could retain the short-term biological advantages of hydroxyapatite without the long-term disadvantages. Although little is known about this material in the dental community, in vivo and in vitro studies show calcium phosphate cement as a promising material for grafting applications. In the following article, the authors review the biological and mechanical properties of calcium phosphate cement, as well as its potential use in clinical applications. A Medline search was performed (timeline: 1980 to 2003) using the following keywords: calcium phosphate cement, hydroxyapatite cement, HA cement, and hydroxyapatite. The search was limited to the English language. The patent literature as well as a limited number of master's theses and books were reviewed after using the electronic database search service from a dental school library. Calcium phosphate cement appears to have excellent biological properties. At only 2 weeks, spicules of living bone with normal bone marrow and osteocytes can be seen. Excellent moldability is a desired clinical characteristic; however, further research is necessary in order to improve the mechanical properties of the cement. The resorption/replacement by bone capability of the cement remains controversial. Further research is needed to clarify this issue. Due to poor mechanical properties, clinical applications are currently limited to craniofacial applications. Further research is necessary to take advantage of the excellent biological properties of this cement under clinical applications. Further research is necessary to understand and improve the behavior of this type of cement under clinical situations.
    Journal of Prosthodontics 01/2006; 15(5):321-8. · 0.68 Impact Factor
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    ABSTRACT: Two important factors in the use of implant-retained overdentures are cleansability and patients' satisfaction. Limited research has been published concerning the cleansability of these overdentures On the other hand, studies have compared patients' satisfaction with conventional dentures and various designs of implant overdentures. However, no studies have compared overdentures retained by Hader bars (Sterngold, Attleboro, Mass.) and direct ERA attachments (Sterngold) in terms of both cleansability and patients' satisfaction. The authors' aim was to determine the cleansability of and patients' acceptance of overdentures retained by direct ERA attachments and overdentures supported by a Hader bar with distal ERA attachments and a Hader clip. Two groups of 10 subjects each were evaluated: Group A, consisting of patients with overdentures retained by direct ERA attachments, and Group B, consisting of patients with overdentures retained by Hader bars. The authors evaluated the subjects between 18 and 24 months after the delivery of the overdentures by means of a questionnaire and a clinical examination to score each patient on gingival, plaque and calculus indexes. Group A exhibited better results than Group B on calculus, plaque and gingival indexes, but the difference was not statistically significant. The authors found no significant difference between the two experimental groups in satisfaction. When evaluated in terms of subjects' satisfaction and calculus, plaque and gingival index scores, implant-retained overdentures supported by direct ERA attachments were similar to those supported by a Hader bar. The two types of overdentures studied are equally satisfactory and easy to clean. Other factors such as biomechanics, patients' preference and previous experience may be more critical when selecting the retention design for an overdenture supported by four implants.
    Journal of the American Dental Association (1939) 10/2002; 133(9):1237-42; quiz 1261. · 1.82 Impact Factor
  • Alberto Ambard, Leonard Mueninghoff
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    ABSTRACT: This article describes the dental rehabilitation of a bulimic patient using endosteal implants. Although the patient, a 31-year-old woman with a long history of bulimia nervosa, had been receiving medical and psychological treatment, the condition was not completely controlled. Clinical examination revealed multiple crowns with extensive cervical caries. The prognosis for all remaining teeth was poor. After extractions, implant therapy was implemented to provide support for fixed prostheses. After the implants were uncovered and during provisional therapy, the peri-implant tissue exhibited inflammation and lack of keratinized tissue requiring additional periodontal procedures before definitive restorations could be placed. Because of the difficulty in managing the peri-implant tissue during the many phases of implant therapy, treatment was challenging. One year after treatment, the patient's low self-esteem had improved substantially and her restorations provided satisfactory esthetics and function.
    Journal of Prosthodontics 10/2002; 11(3):176-80. · 0.68 Impact Factor
  • Alberto Ambard, Leonard Mueninghoff
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    ABSTRACT: This article describes a clinical protocol for the occlusal rehabilitation of patients with severe Angle skeletal Class II malocclusions. Within this protocol, an occlusal device is used for 2 purposes: first, to locate the most suitable maxillary-mandibular relationship for function and range of motion at an established vertical dimension of occlusion; and second, to accurately transfer this relationship to an articulator for fabrication of provisional and definitive restorations. The theory behind this protocol and its associated clinical procedures is presented along with a discussion of the protocol's advantages and disadvantages.
    Journal of Prosthetic Dentistry 09/2002; 88(2):200-7. · 1.72 Impact Factor

Publication Stats

70 Citations
4.91 Total Impact Points

Institutions

  • 2006
    • Oregon Health and Science University
      • School of Dentistry
      Portland, OR, United States
  • 2002–2006
    • University of Alabama at Birmingham
      • School of Dentistry
      Birmingham, Alabama, United States
    • University of Chicago
      • Department of Surgery
      Chicago, IL, United States