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Taiyeb-Ali, T. B. and Toh, C. G. and Siar, C. H. and Seiz, D. and Ong, S. T. (2009) Influence of Abutment Design on Clinical Status of Peri-Implant Tissues. Implant Dentistry, 18 (5). pp. 438-446. ISSN 1056-6163

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    Objective: To compare the clinical soft tissue responses around implant tooth-supported 3-unit bridges using tapered abutments with those using butt-joint abutments. Methods: In a split-mouth design study, 8 mm Ankylos (Dentsply Friadent, Germany) implants were placed in the second mandibular molar region of 8 adult Macaca fascicularis monkeys about I month after extraction of all mandibular molars. After 3 months of submerged healing, 3-unit metal bridges were constructed. Clinical data was collected by the author who was blind to the abutment selections. Implants were clinically evaluated using Waite plaque index, sulcus bleeding index, probing pocket depth (PPD), probing attachment loss (PAL), and width of keratinized mucosa at baseline (BL) and 3-month and 6-month intervals. Stability of the implant was assessed using Periotest device at BL and after 6 months. Results: At BL, all the clinical variables did not differ statistically between the tapered and the butt-joint groups except for PPD (P < 0.05), where the meat? PPD was greater in the butt-joint group (2.75 +/- 1.02 mm) as compared with the tapered group (1.97 +/- 0.65 mm). At the 3-month assessment, there was no difference in all clinical variables. After 6-month loading, no significant difference between these 2 groups was detected in all these variables, with the exception of PAL (P = 0.05) where mean PAL was greater for implants with the butt-joint abutments (0.91 +/- 0.86 mm) in comparison with the tapered abutments (0.50 +/- 0.88 mm), and mean Periotest values (PTVs) that indicate the tapered-abutment implants (PTV = -4.5 +/- 1.60) were more stable than butt-joint-abutment implants (PTV = -1.5 +/- 3.59) with P < 0.05. Conclusions: The differences in these mucogingival responses between these 2 groups at BL (during seating of abutments, especially of butt-joint abutments) and after 6-month loading indicated enhanced peri-implant soft tissue stability around the tapered abutments of this system. There was also enhanced-PTV in the test group for clinical mobility assessment after 6-month loading. (Implant Dent 2009; 18:438-446)

    Item Type: Article
    Additional Information: ISI Document Delivery No.: 508US Times Cited: 0 Cited Reference Count: 20 Cited References: Abrahamsson I, 1997, J CLIN PERIODONTOL, V24, P568, DOI 10.1111/j.1600-051X.1997.tb00230.x Bragger U, 1996, CLIN ORAL IMPLAN RES, V7, P230, DOI 10.1034/j.1600-0501.1996.070305.x Chou Cherng-Tzeh, 2004, J Oral Implantol, V30, P134, DOI 10.1563/1548-1336(2004)30<134:APICBL>2.0.CO;2 Engelke Wilfried, 2004, Implant Dent, V13, P88, DOI 10.1097/01.ID.0000116457.03989.01 Gross M, 1999, INT J ORAL MAX IMPL, V14, P94 Hermann JS, 2001, J PERIODONTOL, V72, P1372, DOI 10.1902/jop.2001.72.10.1372 Jansen VK, 1997, INT J ORAL MAX IMPL, V12, P527 Lang NP, 2004, INT J ORAL MAX IMPL, V19, P150 Morris Harold F, 2004, J Oral Implantol, V30, P121, DOI 10.1563/1548-1336(2004)30<121:IANAII>2.0.CO;2 Morris H F, 2000, J Oral Implantol, V26, P291, DOI 10.1563/1548-1336(2000)026<0291:TAEDIA>2.3.CO;2 MUHLEMAN.HR, 1971, HELV ODONTOL ACTA, V15, P107 Nentwig Georg H, 2004, J Oral Implantol, V30, P171, DOI 10.1563/1548-1336(2004)30<171:TAISCA>2.0.CO;2 Norton Michael R, 2002, Compend Contin Educ Dent, V23, P21 Norton MR, 1997, CLIN ORAL IMPLAN RES, V8, P290, DOI 10.1034/j.1600-0501.1997.080407.x Salvi GE, 2004, INT J ORAL MAX IMPL, V19, P116 Scarano Antonio, 2005, J Oral Implantol, V31, P269, DOI 10.1563/753.1 Steinebrunner L, 2005, INT J ORAL MAX IMPL, V20, P875 TOH CG, 2005, J DENT RES Tsuge T, 2008, DENT MATER J, V27, P29 WAITE IM, 1983, DENTAL PRACTICE, V21, P1 Taiyeb-Ali, Tara B. Toh, Chooi Gait Siar, Chong Huat Seiz, Doris Ong, Siew Tin RD IRPA40-02-03-0002; Dentsply Friadent, Germany This study was supported by R&D IRPA Vote No. 40-02-03-0002; and Dentsply Friadent, Germany. Lippincott williams & wilkins Philadelphia
    Uncontrolled Keywords: monkeys tapered-joint abutment butt-joint abutment platform switching 3-unit bridges in-vitro evaluation marginal fit interface parameters leakage
    Subjects: Medicine and Dentistry > Clinical Dentistry
    Divisions: UNSPECIFIED
    Depositing User: Ms Nursyafiqah Abd Malek
    Date Deposited: 01 Nov 2012 07:43
    Last Modified: 01 Nov 2012 07:43
    URI: http://opendepot.org/id/eprint/1513

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