Literatura – InDex

MECHANICAL CONNETION

1 – Immediate Provisionalization of a Maxillary Lateral Incisor With a Dental Mini-Implant: Surgical and Prosthetic Rationale

Kotaro Oyama, DDS, MS* • Joseph Y.K. Kan, DDS, MS† • Kitichai Rungcharassaeng DDS, MS±

*Assistant Professor, Advanced Education in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, CA.
†Professor, Department of Restorative Dentistry, Loma Linda University School of Dentistry, Loma Linda, CA.
±Associate Professor, Department of Orthodontics and Dentofacial Orthopedicsc, Loma Linda University School of Dentistry, Loma Linda.
Kotaro Oyama, DDS, MS, Oyama Dental Office, 2-22-2 Haramachi, Meguroku, Tokyo, Japan.
Pract Proced Aesthet Dent 2009;21(4):249-255

ABSTRACT

Dental mini implants were first introduced as transitional implants to support interim prostheses during the healing of a definitive implant or implants. When the inter-radicular space and/or buccolingual bone width are limited, however, mini-implants have been used successfully as definitive implants. This article describes in detail the use of a mini-implant in the treatment of a congenital missing maxillary lateral incisor. Also discussed are recommendations for mini-implant placement relative to anatomic landmarks as well as the surgical and prosthetic rationale.

Learning Objectives: This article highlights the surgical and prosthetic considerations used in mini-implant placement for a patient with a congenitally missing lateral incisor. Upon completing this exercise the reader should:

  • Understand the clinical indications for successful use of mini-implants.
  • Improve his or her clinical decision making relative to the selection of mini-implants versus conventional implants.

2 – In vitro evaluation of the implant abutment connection sealing capability of different implant systems

P. G. Coelho*, P. Sudack*, M. Suzuki†, K. S. Kurtz‡, G. E. Romanos§ & N. R. F. A. Silva*
*Department of Biomaterials and Biomimetics, New York University, New York, NY
†Department of Prosthodontics and Operative Dentistry, Tufts School of Dental Medicine, Boston, MA,
‡Departments of Dentistry & Otolaryngology, Montefiore Medical Center / Albert Einstein College of Medicine, Bronx, NY
§Department of Periodontology, University of Rochester School of Dentistry and Medicine, Rochester, NY, USA
J Oral Rehabil. 2008 Dec;35(12):917-24. Epub 2008 Oct 29. © 2008 The Authors. Journal compilation ©2008 Blackwell Publishing Ltd

ABSTRACT

This study sought to evaluate the sealing capability of the implant abutment connection of different dental implant systems. Five Nobel Replace select, Straumann and Intra-lock implants of approximately 4.5 mm diameter with their respective abutments were provided by the manufacturers.

A calibration curve was determined by placing toluidine blue (TB) increments of 0.1 lL into 1.5 mL of distilled water and recording its absorbance in a spectrophotometer until reaching 0.7 lL. Then, 0.7 lL of TB was placed in the deepest portion of each implant’s internal screw, the abutments were adapted to the implant according to the manufacturer’s instructions and the specimens were placed in vials with 1.5 mL of distilled water.

Spectrophotometric analysis was performed at 1, 3, 6, 24, 48, 72, 96 and 144 h. Statistical analysis was performed by One-way ANOVA at 95% level of significance. The calibration curve was linear with respect to the TB amount in 1.5 lL distilled water (R2 = 0.9961). All implant abutment systems presented an increase in absorbance as a function of time.

As time elapsed in vitro, significantly higher amounts of TB was released from the Straumann and Nobel Replace Select connection systems (P < 0.0001). Leakage was significant between the groups. Despite controlled torquing, the seal between the implant body and the abutment could not be maintained in all three of the systems tested.