J Adv Prosthodont.  2017 Oct;9(5):341-349. 10.4047/jap.2017.9.5.341.

Accuracy of several implant bite registration techniques: an in-vitro pilot study

• Park DH
• Park JM
• Choi JW
• Kang ES
• Bae EB
• Jeon YC
• Jeong CM
• Yun MJ
• Huh JB

• KMID: 2393219
• DOI: http://doi.org/10.4047/jap.2017.9.5.341

Abstract

PURPOSE
This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis.
MATERIALS AND METHODS
Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration materials on the healing abutments (H) or temporary abutments (T). The groups were classified into HA, HP, HB, TA, TP, and TB according to each combination. The group using the bite impression coping was the BC group; impression taking and bite registration were performed simultaneously. After impression and bite taking, the scan bodies were connected to the lab analogs of the casts. These casts were scanned using a model scanner. The distances between two reference points in three-dimensional files were measured in each group. One-way ANOVA and Duncan's test were used at the 5% significance level.
RESULTS
The smallest distance discrepancy was observed in the TB group using the temporary abutments. The Blu-Mousse and HP groups showed the largest distance discrepancy. The TB and BC groups showed a lower distance discrepancy than the HP group (P=.001), and there was no significant difference between the groups using the temporary abutments and healing abutments (P>.05).
CONCLUSION
Although this study has limitations as an in-vitro investigation, the groups using the temporary abutments to hold the Blu-Mousse record and bite impression coping showed greater accuracy than the group using the healing abutments to hold the pattern resin record.

Keyword

Implant prostheses; Bite registration; Bite impression; Accuracy; Three dimensional analysis

MeSH Terms

Bicuspid
Jaw Relation Record*
Molar
Pilot Projects*
Polyurethanes
Prostheses and Implants
Polyurethanes

Figure

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  Fig. 1 Fabricated reference model. (A) Top view of the mandibular polyurethane cast with the implant fixtures. (B) Mounting of the polyurethane casts on a semi-adjustable dental articulator.

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  Fig. 2 Final impression taking. (A) Individual tray for groups using the healing abutment and temporary abutment. (B) Final impression with an individual tray. (C) Connection of the Pick Cap coping for the group with a bite impression coping. (D) Final impression with a bite tray for the group with a bite impression coping.

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  Fig. 3 Bite registration for groups with the healing abutments. (A) Connection of the healing abutments, (B) Group HA: Aluwax, (C) Group HP: Pattern Resin, (D) Group HB: Blu-Mousse.

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  Fig. 4 Bite registration for groups using the temporary abutments. (A) Connection of the temporary abutments, (B) Group TA: Aluwax, (C) Group TP: Pattern Resin, (D) Group TB: Blu-Mousse.

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  Fig. 5 Schematic diagram of this study. HA = using healing abutments to hold the Aluwax record; HP = using healing abutments to hold the Pattern Resin record; HB = using healing abutments to hold the Blu-Mousse record; TA = using temporary abutments to hold the Aluwax record; TP = using temporary abutments to hold the Pattern Resin record; TB = using temporary abutments to hold Blu-Mousse record; BC = using bite impression copings and a bite tray.

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  Fig. 6 Measurements for the evaluation of interocclusal accuracy. (A) Maxillary arch 3D file, (B) Mandibular arch 3D file, (C) Mandibular reference point: the center of the superior surface of the right mandibular first molar site scan body, (D) Distance between the center of the superior surface of the right mandibular first molar site scan body and the mesiopalatal cusp tip of the maxillary first molar.

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