全口义齿印模 (Impression of complete denture). 1. Classification of impression

全口义齿印模全口义齿印模(Impression of complete dentur(Impression of complete dentur

e)e)

1.1. Classification of Classification of impressionimpression

According to impression According to impression timestimes • Primary impression method (Primary impression method ( 一次印模一次印模 ))

• Secondary impression method (combinSecondary impression method (combined impression) (ed impression) ( 二次印模法又称联合印模二次印模法又称联合印模法法 ))

According to the patient mouth According to the patient mouth (open or close)(open or close)

• Open-mouth impression (Open-mouth impression ( 开口式印模开口式印模 ))

• Close-mouth impression (Close-mouth impression ( 闭口式印模闭口式印模 ))

According the press to the According the press to the mucosamucosa

• Mucostatic impression technique(Mucostatic impression technique( 粘膜粘膜静止式印模静止式印模 ))

• Mucodynamic impression(Mucodynamic impression( 粘膜运动式印粘膜运动式印模模 ))

2.Method and procedure of 2.Method and procedure of making impression of making impression of complete denturecomplete denture

Preparation (stock trays Preparation (stock trays selection)selection)

Making preliminary Making preliminary impressionimpression

The fabrication of custom The fabrication of custom traystrays

Buccal border modeling (Buccal border modeling ( 颊部边缘修整颊部边缘修整 ))

labial border modeling (labial border modeling ( 唇部边缘修整唇部边缘修整 ))

posterior border modeling (posterior border modeling ( 后部边缘修整后部边缘修整 ))

唇系带Labial frenum

颊系带Buccal frenum

后部边缘封闭区Posterior seal border

颊侧翼缘区Buccal flange area

舌侧翼缘区Lingual flange area

Another kind of method to make custom trayAnother kind of method to make custom tray

Making final impressionMaking final impression

3. Requirement of the 3. Requirement of the impressionimpression• The tissues should be pressed The tissues should be pressed

evenly.evenly.

• Enlarge the impression areas Enlarge the impression areas appropriately.appropriately.

• Making functional impressionMaking functional impression

• Keep the stable position.Keep the stable position.

模型模型 (model or cast)(model or cast)

Requirement of the castRequirement of the cast

• Border width 3-5mmBorder width 3-5mm• There should be about 10mm of the stonThere should be about 10mm of the ston

e in the thinnest parte in the thinnest part• The posterior border of the upper cast wThe posterior border of the upper cast w

as at least 2mm posteriorly to palatine fas at least 2mm posteriorly to palatine foveaovea

• At least 10 mm length from the anterior At least 10 mm length from the anterior part of the retromolar pad part of the retromolar pad

PouringPouring the castthe cast

• Boxing methodBoxing method

• General methodGeneral method

Treatment of post-dam areaTreatment of post-dam area