C.29.3 Implant Template Group Module
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### C.29.3 Implant Template Group Module

This section describes the specific modules for the Implant Template Group IOD.

#### C.29.3.1 Implant Template Group Module

Table C.29.3-1 contains the Attributes of the Implant Template Group Module.

Table C.29.3-1. Implant Template Group Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Effective DateTime | (0068,6226) | 1 | Date and time from which on this Instance is valid.
Implant Template Group Name | (0078,0001) | 1 | Name of this group
Implant Template Group Description | (0078,0010) | 3 | Purpose or intent of this group.
Implant Template Group Issuer | (0078,0020) | 1 | Person or Organization that issued this group.
Implant Template Group Version | (0078,0024) | 2 | The version code of the Implant Template Group.
Replaced Implant Template Group Sequence | (0078,0026) | 1C | Reference to the Implant Template Group that is replaced by this Instance. Only a single Item shall be included in this Sequence. Required if this Instance replaces another Instance.
>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
Implant Template Group Target Anatomy Sequence | (0078,0028) | 3 | Identifies the anatomical region the implant is to be implanted to. One or more Items are permitted in this Sequence.
>Anatomic Region Sequence | (0008,2218) | 1 | Sequence that identifies the anatomic region of interest in this Instance (i.e., external anatomy, surface anatomy, or general region of the body). Only a single Item shall be included in this Sequence.
>>Include Table 8.8-1 “Code Sequence Macro Attributes” | Defined CID 7304 “Implant Target Anatomy”.
Implant Template Group Members Sequence | (0078,002A) | 1 | Contains references to all Implant Template SOP instances that are part of this group. One or more Items shall be included in this Sequence.
>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
>Implant Template Group Member ID | (0078,002E) | 1 | Numeric ID of the Implant Template. Uniquely identifies the Implant Template within the Implant Template Group. The value shall start at 1, and increase monotonically by 1 for each Item.
>3D Implant Template Group Member Matching Point | (0078,0050) | 1C | 3D inter-component Matching Point. May be present if Number of Surfaces (0066,0001) is present in the Instance referenced in the Implant Template Group Members Sequence Item. See Section C.29.3.1.1.1
>3D Implant Template Group Member Matching Axes | (0078,0060) | 1C | Direction cosines of the Matching Point. Required if 3D Implant Template Group Matching Point (0078,0050) is present.
> Implant Template Group Member Matching 2D Coordinates Sequence | (0078,0070) | 1C | One or more Items shall be included in this Sequence. May be present if HPGL Document Sequence (0068,62C0) is present in the Instance referenced in the Implant Template Group Members Sequence Item. See Section C.29.3.1.1.1
>>Referenced HPGL Document ID | (0068,6440) | 1 | Value of the HPGL Document ID (0068,62D0) present in the HPGL Document Sequence (0068,62C0) of the Instance that is referenced in the Implant Template Group Members Sequence Item. Shall be unique within the sequence.
>>2D Implant Template Group Member Matching Point | (0078,0090) | 1 | 2D inter-component Matching Point. See Section C.29.3.1.1.1.
>>2D Implant Template Group Member Matching Axes | (0078,00A0) | 1 | Direction cosines of the Matching Point. See Section C.29.3.1.1.1.
Implant Template Group Variation Dimension Sequence | (0078,00B0) | 1 | List of all Variation Dimensions that are covered by this group. One or more Items shall be included in this Sequence. See Section C.29.3.1.1.2.
>Implant Template Group Variation Dimension Name | (0078,00B2) | 1 | Descriptive name of the variation dimension.
>Implant Template Group Variation Dimension Rank Sequence | (0078,00B4) | 1 | Order in which the implant group members are sorted according to this dimension. One or more Items shall be included in this Sequence.
>> Referenced Implant Template Group Member ID | (0078,00B6) | 1 | Value of the Implant Template Group Member ID (0078,002E) present in the Implant Template Group Member Sequence (0078,002A) that contains the Implant Template Group Member Items. Shall be unique within the sequence.
>>Implant Template Group Variation Dimension Rank | (0078,00B8) | 1 | The rank of this Implant Template in the Variation Dimension. In one Implant Template Group Variation Dimension Rank Sequence there may be more than one Implant Templates with the same rank.

##### C.29.3.1.1 Implant Template Group Module Attribute Description

###### C.29.3.1.1.1 Implant Template Group Member Matching Coordinates

Template Groups are used to facilitate browsing through a set of similar implants. The Template Group Member Matching Coordinates is a coordinate system in the Frame of Reference of every member of the group that is used to place and orient the members of the group in a similar way: When a user or a system positioned one member of the group within the Frame of Reference of the patient, then all other members of the family are placed and oriented so that their Template Group Member Matching Coordinates coincide.

The matching coordinates are applied similar to the mating features during implant template mating. An example is found in part 17, Figure C.29.3.1.1.1-1.

Figure C.29.3.1.1.1-1. Implant Template Groups Example.

###### C.29.3.1.1.2 Implant Template Groups

Implant templates in the group can be ordered according to several orthogonal dimensions, e.g., width and length. This is intended to facilitate scrolling through the implant template repository by offering references to the next bigger and smaller templates according to multiple criteria. Figure C.29.3.1.1.2-1 shows how the Variation Dimensions may be used for plates that differ in two dimensions: length and number of holes.

Figure C.29.3.1.1.2-1. Implant Template Group for 2 Dimensions Example

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